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AU2005200729B2 - New modulators of dopamine neurotransmission - Google Patents
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AU2005200729B2 - New modulators of dopamine neurotransmission - Google Patents

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AU2005200729B2
AU2005200729B2 AU2005200729A AU2005200729A AU2005200729B2 AU 2005200729 B2 AU2005200729 B2 AU 2005200729B2 AU 2005200729 A AU2005200729 A AU 2005200729A AU 2005200729 A AU2005200729 A AU 2005200729A AU 2005200729 B2 AU2005200729 B2 AU 2005200729B2
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Bengt Andersson
Clas Sonesson
Joakim Tedroff
Nicholas Waters
Susanna Waters
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Teva Pharmaceuticals International GmbH
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    • C07D211/18—Heterocyclic compounds containing hydrogenated pyridine rings, not condensed with other rings with only hydrogen or carbon atoms directly attached to the ring nitrogen atom having no double bonds between ring members or between ring members and non-ring members with hydrocarbon or substituted hydrocarbon radicals directly attached to ring carbon atoms with substituted hydrocarbon radicals attached to ring carbon atoms
    • C07D211/34—Heterocyclic compounds containing hydrogenated pyridine rings, not condensed with other rings with only hydrogen or carbon atoms directly attached to the ring nitrogen atom having no double bonds between ring members or between ring members and non-ring members with hydrocarbon or substituted hydrocarbon radicals directly attached to ring carbon atoms with substituted hydrocarbon radicals attached to ring carbon atoms with hydrocarbon radicals, substituted by carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals
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    • C07D295/096—Heterocyclic compounds containing polymethylene-imine rings with at least five ring members, 3-azabicyclo [3.2.2] nonane, piperazine, morpholine or thiomorpholine rings, having only hydrogen atoms directly attached to the ring carbon atoms with substituted hydrocarbon radicals attached to ring nitrogen atoms substituted by singly bound oxygen or sulfur atoms with the ring nitrogen atoms and the oxygen or sulfur atoms separated by carbocyclic rings or by carbon chains interrupted by carbocyclic rings
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Description

AUSTRALIA
Patents Act 1990 COMPLETE SPECIFICATION STANDARD PATENT Applicant: A. CARLSSON RESEARCH AB Invention Title: NEW MODULATORS OF DOPAMINE NEUROTRANSMISSION The following statement is a full description of this invention, including the best method of performing it known to me/us: ci C NEW MODULATORS OF DOPAMINE NEUTROTRANSMISSION
VO
Field of the Invention The present invention relates to new modulators C of dopamine neurotransmission, and more specifically to new substituted 4-(phenyl N-alkyl) piperazines, and use 0 5 thereof.
ci o Background of the invention Ci Dopamine is a neurotransmitter in the brain. Since this discovery, made in the 1950s, the function of dopamine in the brain has been intensely explored. To date, it is well established that dopamine is essential in several aspects of brain function including motor, cognitive, sensory, emotional and autonomous regulation of appetite, body temperature, sleep) functions. Thus, modulation of dopaminergic function may be beneficial in the treatment of a wide range of disorders affecting brain functions. In fact, both neurologic and psychiatric disorders are treated with medications based on interactions with dopamine systems and dopamine receptors in the brain.
Drugs that act, directly or indirectly, at central dopamine receptors are commonly used in the treatment of neurologic and psychiatric disorders, e.g. Parkinson's disease and schizophrenia. Currently available dopaminergic pharmaceuticals have severe side effects, such as extrapyramidal side effects and tardive dyskinesia in dopaminergic antagonists used as antipsychotic agents, and dyskinesias and psychoses in dopaminergic agonists used as anti-Parkinson's agents. Therapeutic effects are unsatisfactory in many respects. To improve efficacy and reduce side effects of dopaminergic pharmaceuticals, novel dopamine receptor ligands with selectivity at specific dopamine receptor subtypes or regional selectivity are sought for. In this context, also partial dopamine Cl 2 receptor agonists, i.e. dopamine receptor ligands with Ssome but not full intrinsic activity at dopamine recep- 00 tors, are being developed to achieve an optimal degree of stimulation at dopamine receptors, avoiding excessive dopamine receptor blockade or excessive stimulation.
Cl Compounds belonging to the class of substituted 4o(phenyl-N-alkyl)-piperazine and substituted 4-(phenyl-N- Salkyl)-piperidines have been previously reported. Among V these compounds, some are inactive in the CNS, some display serotonergic or mixed serotonergic/dopaminergic pharmacological profiles while some are full or partial dopamine receptor agonists or antagonists with high affinity for dopamine receptors.
A number of 4-phenylpiperazines and 4-phenylpiperidine derivatives are known and described, for example Costall et al. European J. Pharm. 31, 94, (1975), Mewshaw et al. Bioorg. Med. Chem. Lett., 8, 295, (1998).
The reported compounds are substituted 4-phenylpiperazine's, most of them being 3- or 4-OH phenyl substituted and displaying DA autoreceptor agonist properties.
Fuller et al, J. Pharmacol. Exp. Therapeut.
218, 636, (1981) disclose substituted piperazines (e.g.
1-(m-trifluoro-methylphenyl)piperazine) which reportedly act as serotonin agonists and inhibit serotonin uptake.
Fuller R. W. et al, Res. Commun. Chem. Pathol. Pharmacol.
17, 551, (1977) disclose the comparative effects on the 3,4-dihydroxy-phenylacetic acid and Res. Commun. Chem.
Pathol. Pharmacol. 29, 201, (1980) disclose the comparative effects on the 5-hydroxyindole acetic acid concentration in rat brain by 1-(p-chlorophenol)-piperazine.
Boissier J. et al Chem Abstr. 61:10691c, disclose disubstituted piperazines. The compounds are reportedly adrenolytics, antihypertensives, potentiators of barbiturates, and depressants of the central nervous system.
A number of different substituted piperazines have been published as ligands at 5-HTA receptors, for example in o 3 ci SGlennon R.A. et al J. Med. Chem., 31, 1968, (1988), van SSteen J. Med. Chem., 36, 2751, (1993), Mokrosz, J.
et al, Arch. Pharm. (Weinheim) 328, 143-148 (1995), and Dukat J. Med. Chem., 39, 4017, (1996). Glennon R.
A. discloses, in international patent applications WO 0 93/00313 and WO 91/09594 various amines, among them subci stituted piperazines, as sigma receptor ligands. Clinical o studies investigating the properties of sigma receptor C ligands in schizophrenic patients have not generated evidence of antipsychotic activity, or activity in any other 0i CNS disorder. Two of the most extensively studied selective sigma receptor antagonists, BW234U (rimcazole) and BMY14802, have both failed in clinical studies in schizophrenic patients (Borison et al, 1991, Psychopharmacol Bull 27(2): 103-106; Gewirtz et al, 1994, Neuropsychopharmacology 10:37-40).
Further, WO 93/04684 and GB 2027703 also describe specific substituted piperazines useful in the treatment of CNS disorders.
Summary of the invention In the work leading to the present invention, it was found that it is desired to provide substances with specific pharmacological properties, namely substances that have modulating effects on dopamine neurotransmission.
These properties have not been described earlier, and they are not possible to obtain with the earlier known compounds. The compounds according to the present invention have a very surprising and interesting dualistic dopaminergic action profile with antagonist-like effects on brain neurochemistry and mild agonist-like effects on 4 o normal behaviour, but they induce inhibition of behaviour CA' in states of hyperactivity.
The present invention thus relates to new 3- Ssubstituted 4-(phenyl-N-alkyl) piperazines in the form of I\ 5 free base or pharmaceutically acceptable salts thereof, pharmaceutical compositions containing said compounds and use of said compounds in therapy.
N One subject of the invention is to provide new compounds for therapeutic use, and more precisely o 10 compounds for modulation of dopaminergic systems in the fl mammalian brain, including human brain.
o Another subject of the invention is to provide C' compounds with therapeutic effects after oral administraton.
More precisely, the present invention relates to a 3-substituted 4-(phenyl-N-alkyl)-piperazine compound of Formula 1: R1 6N x/ NR2 wherein: RI is selected from the group consisting of OSO 2
CF
3
OSO
2
CH
3 S0 2
R
3
COCF
3 COCH3 and COCH 2
CH
3 wherein R 3 is as defined below;
R
2 is selected from the group consisting of Ci-C 4 alkyls, allyl, CH 2
CH
2
OCH
3
CH
2
CH
2
CH
2 F, CH 2
CF
3 3,3,3-trifluoropropyl and 4,4,4-trifluorobutyl;
R
3 is selected from the group consisting of C 1
-C
3 alkyls,
CF
3 and N(CH 3 2 with the proviso that when Ri is S0 2
R
3 and R 3 is a Ci-C 3 alkyl, then R 2 is not CH2CH 2 0CH 3 or a pharmaceutically acceptable salt thereof.
H!\NaraR\Keep\SPeci\P5S92S.doc 16/03/05 0 cO ci The compounds according to the present invention o possess dopamine-modulating properties and are useful in treating numerous central nervous system disorders including both psychiatric and neurological symptoms.
cq Diseases in which compounds with modulating effects on dopaminergic systems may be beneficial are in disorders related to ageing, for preventing bradykinesia and depression and for the improvement of mental functions.
They may also be used to improve cognitive functions and related emotional disturbances in neurodegenerative and developmental disorders as well as after brain damage.
The compounds according to the invention can be used to improve all symptoms of psychosis, including schizophrenia and schizophreniform disorders as well as drug induced psychotic disorders. The compounds according to the invention may also be used in behavioral disorders usually first diagnosed in infancy, childhood, or adolescence as well as in impulse control disorders. Also, speech disorders such as stuttering may improve. They may also be used for treating substance abuse disorders as well as disorders characterized by misuse of food.
Mood and anxiety disorders, personality disorders, and conversion hysteria may also be treated with the compounds according to the invention.
Neurological indications include the treatment of Huntington's-disease and other movement disorders as well as movement disorders induced by drugs. Restless legs and related disorders as well as narcolepsy may also be treated with compounds included according to the invention. They may also improve mental and motor function in Parkinson's disease, and in related parkinsonian syn- Sdromes. They may also be used to ameliorate tremor of different origins. They may be used in the treatment of 00 headaches and used to improve brain function following vascular or traumatic brain injury. Moreover, they may be used to relieve pain in conditions characterized by in- ON creased muscle tone.
The compounds according to the present invention o have unexpectedly been found to act specifically on dopa- V) minergic systems in the brain. They have effects on bioo 10 chemical indices in the brain with the characteristic Ci features of selective dopamine antagonists, e.g. producing increases in concentrations of dopamine metabolites.
Yet, dopamine receptor antagonists characteristically suppress behavioral activity and induce catalepsy, while the compounds of this invention show no, or only limited, inhibitory effects on spontaneous locomotion. In contrast they may induce a slight behavioral activation with concomitant increases in small-scale movements, e.g.
stops in the center of the behavior recording arena, similar to that induced by dopaminergic agonists. The behavioral activation is limited, not reaching the profound increases in activity induced by direct or indirect -dopaminergic agonists. On the other hand, the preferred substances reduce the increase in activity induced by direct or indirect dopaminergic agonists, i.e. d-amphetamine and congeners.
Thus, the compounds of this invention surprisingly show an interesting dualistic dopaminergic action profile with antagonist like effects on brain neurochemistry and mild agonist like effects on normal behavior, but inhibition of behavior in states of hyperactivity. The action profile suggests modulatory effects on dopaminergic functions, clearly different from known compounds belonging to these chemical classes or effects anticipated of typical dopamine receptor antagonists or agonists from these or other chemical classes.
Cl 7 Given the involvement of dopamine in a large variety Sof CNS functions and the clinical shortcomings of pres- 00 ently available pharmaceuticals acting on dopamine systems, the novel class of dopaminergic modulators presented in this invention may prove superior to presently Cl known dopaminergic compounds in the treatment of several o disorders related to dysfunctions of the CNS, in terms of C efficacy as well as side effects.
SSome compounds according to the invention have been found to have surprisingly good pharmacokinetic properties including high oral bioavailability. They are thus suitable for the preparation of orally administered pharmaceuticals. There is no guidance in the prior art how to obtain compounds with this effect on dopamine systems in the brain.
Detailed Description of the Invention Pharmacolov Evidence is available that neurotransmission in the CNS is disturbed in psychiatric and neurologic diseases.
In many instances, for example in schizophrenia or Parkinson's disease, pharmacotherapies based on antagonism or agonism at dopamine receptors are useful, but not optimal. In recent years much efforts have been put on finding novel and selective ligands for dopamine receptor subtypes (Di, D 2
D
3 D4, D 5 with the aim to improve efficacy and reduce side effects.
The present invention offers another principle for novel therapeutics based on interactions with dopamine systems. The compounds according to the invention have effects on brain neurochemistry similar to antagonists at dopamine D 2 receptors. In contrast to currently used dopamine receptor antagonists the compounds according to the invention show no or limited inhibitory effects on spontaneous locomotion. They may induce behavioral activation with concomitant increases in small-scale movements, e.g- stops in the center of the behavior recording o 8 D arena, similar to that induced by dopaminergic agonists.
c The behavioral activation is limited, not reaching the OO profound increases in activity induced by direct or indirect dopamine receptor agonists. Surprisingly, the preferred substances can actually reduce the increase in ac- C tivity induced by direct or indirect dopaminergic agoci nists, i.e. d-amphetamine and congeners.
O The preferred structures are substituted in the meta CA position on the aromatic ring. An example of such a compound is methanesulfonic acid 3-(l-propyl-piperidin-4- C yl)-phenyl ester, which is shown in Example 14 below. In rat, this compound increases 3,4-dihydroxyphenylacetic acid in the striatum from 1265 74 (controls) to 3208 236 ng/g tissue at 50 pmol/kg s.c. in combination with a slight increase in behavioral activity; 1485 328 min (controls) to 2126 240 cm/30 min at 50 gmol/kg n=4. Another preferred example of a compound according to the invention is 4-(3-methanesulfonyl-phenyl)- 1-propyl-piperidine, further illustrated in Example 6. In rat, this compound increases 3,4-dihydroxy-phenylacetic acid in the striatum from 914 19 (controls) to 1703 19 ng/g tissue at 50 rmol/kg s.c. This increase in dopamine turnover is followed by a trend towards an increase in motor activity from 2030 299 cm/60 min to 2879 398 cm/60 min p 0.14. In animals habituated to the motilitymeter box the compound described in Example 6, 4-(3methanesulfonyl-phenyl) -1-propyl-piperidine, increases behavioral activity from 476 279 cm/60 min (controls) to 1243 72 cm/60 min, p 0.05, n 4, and 4dihydroxyphenylacetic acid in the striatum from 975 23 (controls) to 2074 144 ng/g tissue at 50 mol/kg s.c., p 0.05, n 4.
In addition, the compound described in Example 6, 4- (3-methanesulfonyl-phenyl)-1-propyl-piperidine, has the preferred ability to reduce behavioral activation induced by both d-amphetamine (1.5 mg/kg and dizolcipine (Mk-801, 0,7 mg/kg d-Amphetamine hyperactivity is SPCT/SE00/02674 09 1) reduced from 10694 2165 cm/60 min to 1839 344 p 0.05 n 4, at 50 pmol/kg s.c. of the com- 00 pound described in Example 6 and behavioral activation induced by dizolcipine (Mk-801) is reduced from 32580 4303 cm/60 min to 18197 1389 cm/60min p 0.05, at pmol/kg sc. Surprisingly, the compound described in Exam- O ple 6 has an oral availability of 85% in rat.
Cl Unlike the somewhat similar compounds described in o W091/09594, the compound of Example 6, 4-(3-methane- C 10 sulfonyl-phenyl)-1-propyl-piperidine, lacks affinity at the sigma receptor, <50% inhibition of [3H]-DTG binding (according to a method for measurement of sigma binding described by Shirayama Y. et al., 1993, Eur. J. Pharmacol. 237, p 117) at 10 pmol/L to rat brain membranes.
In order to demonstrate the surprising effects of the compounds according to the invention, some of the compounds have been compared to similar compounds according to prior art. The compounds used for comparison with the compounds according to the invention in the comparative examples are thus not compounds according to the invention since they do not exhibit the desired properties.
Comparative example 1: 4-(4-methanesulphonylphenyl)-1-propyl piperidine illustrates that substitution in the para position yields inactive compounds. 4-(4methanesulphonyl-phenyl)-l-propyl piperidine has no effect on 3,4-dihydroxyphenyl-acetic acid in the striatum as demonstrated in the neurochemical experiment; 988 (controls) ng/g tissue and 928 51 ng/g tissue at pmol/kg s.c. 4-(4-methanesulphonyl-phenyl)-1-propyl piperidine does not have the properties desired according to the invention.
Comparative example 2: To further illustrate the importance of the substitition on the aromatic ring for the desired properties, 4-phenyl-1-propyl-piperidine is demonstrated to lack activity in the behavioral assay in the non-pre-treated rat, 3661±494 cm/60 min, controls, to 2553 471 cm/60 min, p>0.05, n 4, at 33 Amol/kg and c Slacks effects on 3,4-dihydroxyphenyl-acetic acid in the Sstriatum as demonstrated in the neurochemical experiment; 00 1027 31 (controls) ng/g tissue and 1190 70 ng/g tissue at 33 pmol/kg p 0.05., 4-phenyl-l-propylpiperidine] also lacks the desired inhibition of behav- (C ioral activity in the d-amphetamine stimulated (17295 o 4738 cm/60 min, d-amphetamine, to 13764 2919 cm/60 min, C- n 4, p 0.05 at 33 pmol/kg.
SComparative example 3: Further, l-phenyl-4-propylo 10 piperazine, described as sigma receptor binding compound in W091/09594, is found to reduce behavioral activity in the non-pre-treated animal, from 3370 227, controls, to 1923 204 cm/60 min, n 4, p 0.05 at 33 pmol/kg s.c., thus lacking the properties sought for.
Comparative example 4: Substitution in the ortho position as exemplified by 1-(2-methoxy-phenyl)-4-propyl piperazine yields a compound which increases 3,4dihydroxyphenylacetic acid in the striatum from 1028 9 (controls) ng/g tissue to 3836 65 ng/g tissue at pmol/kg p 0.05, n 4. This is followed by the behavioral inhibition not sought for in the present invention; 1651 300 cm/60 min (controls) to 67 34 min, at 50 pmol/kg p 0.05, n 4.
Comparative example 5: The properties of the substituent in the meta position are important. l-propyl-4- (3-triflouro-methyl-phenyl) piperazine increases 3,4dihydroxyphenyl-acetic acid in the striatum from 1066 46 (controls) ng/g tissue to 3358 162 ng/g tissue at pmol/kg p 0.05, n 4, however, followed by behavioral inhibition from 1244 341 cm/60 min (controls) to 271 137 at 50 pmol/kg p 0.05, n 4, thus, lacking the properties sought for in the present invention.
Comparative example 6: Further, the compound of 3- (4-Propyl-piperazine-l-yl)-benzonitrile increases 3,4dihydroxyphenyl-acetic acid in the striatum from 1432 57 (controls) ng/g tissue to 4498 243 ng/g tissue at 0 11 ,D 100 /pmol/kg p 0.05, n 4, and-redi-es 4 indole acetic acid from 630 16 (controls) ng/g tissue 00 to 484 26 ng/g tissue at 100 pmol/kg p 0.05, n 4. These effects are followed by behavioral inhibition from 3959 688 cm/60 min (controls) to 634 266 at 100 pmol/kg p 0.05, n 4, thus, lacking the Sproperties sought for in the present invention. 3-(4o propyl-piperazine-l-yl)-benzonitrile has the following Sproperties: m.p. 159 0 C (fumarate) MS m/z (relative inteno 10 sity, 70 eV) 229 28), 200 157 129 (22), c 70 Comparative example 7: Another example of the importance of the substituent is preparation 14 which has no effect on 3,4-dihydroxy-phenyl-acetic acid in the striatum; 1121 36 (controls) ng/g tissue to 1169 42 ng/g tissue at 50 pmol/kg s.c.
Comparative example 8: The physicochemical properties of the substituent on the basic nitrogen is also important for the desired profile. It is not possible to use any substituent, which is exemplified by 1-phenethyl- 4-(3-trifluoromethyl-phenyl)-piperazine described as a sigma receptor ligand in WO 91/09594 and WO 93/00313 which has some effects on 3,4-dihydroxyphenylacetic acid in the striatum; 852 33 (controls) to 1406 77 ng/g tissue at 50 pmol/kg p 0.05, n 4, but also reduces both 5-hydroxyindoleacetic acid in the striatum from 358 20 (controls) to 289 16 ng/g tissue at pmol/kg p 0.05, n 4, and serotonin (5-HT) from 379±10 (controls) to 282±6 ng/g tissue at 50 pmol/kg p 0.05, n 4, which is an undesired property according to this invention but in accordance with the reported IC50 of 20,3 nM at the 5-HTIA receptor (WO 93/00313).
Comparative example 9: In addition, 1-benzyl-4-(3methanesulfonyl-phenyl) -piperidine and 3-(1-benzylpiperidin-4-yl)-phenol, compounds with benzylic substitution on the basic nitrogen, both has the undesired propc .12 2 erty to interact with serotonin systems in the brain. 1- [i Benzyl-4-(3-methanesulfonyl-phenyl)-piperidine increases 00 5-hydroxyindoleacetic acid in the striatum from 428±20 (controls) to 487±7 ng/g tissue at 50 pmol/kg p 0.05, n 4, and reduces serotonin (5-HT) from 442±15 C, (controls) to 345±18 ng/g tissue at 50 pmol/kg p o 0.05, n 4, and induces the serotonin behavioral syno drome (serotonin behavioral syndrome is e.g. described by in Tricklebank et al., 1985, Eur. J. Pharmacol, 106, pp 271- 282). 3-(l-Benzyl-piperidin-4-yl)-phenol has the unde- C sired ability to increse 5-hydroxyindoleacetic acid in the striatum from 404±10 (controls) to 492±26 ng/g tissue at 50 mol/kg p 0.05, n 4, and reduces serotonin in the limbic region (5-HT) from 734±8 (controls) to 677±20 ng/g tissue at 50 Amol/kg p 0.05, n 4.
Comparative example 10: Substitution on the basic nitrogen according to 2-[4-(3-methanesulfonyl-phenyl)piperazin-1-yll-ethanol] (described in GB 2027703) renders compounds which are inactive in the behavioral activity test; 3238 1089 cm/60 min (controls) to 3782 962 cm/60 min at 33 gmol/kg n=4, p 0.05, as well as in the neurochemical test; effects on 3,4dihydroxyphenylacetic acid in the striatum; 1158 126 (controls) to 1239 162 ng/g tissue at 33 pmol/kg s.c., n 4, p 0.05.
The compounds according to the invention are especially suitable for treatment of disorders in the central nervous system, and particularly for treatment of dopamine mediated disorders. They may, e.g. used to ameliorate symptoms of mood disorders, in obesitas as an anorectic agent and in other eating disorders, to improve cognitive functions and related emotional disturbances, to improve cognitive and motor dysfunctions associated with developmental disorders, to improve all symptoms of schizophrenia and schizophreniform disorders as well as other psychoses, to improve ongoing symptoms as well as to prevent the occurrence of new psychotic episodes, to 04 13 regulate pathological disorders due to intake of food, coffee, tea, tobacco, alcohol, addictive drugs etc.
00 The compounds according to the invention can thus be used to treat symptoms in e.g.: schizophrenia and other psychotic disorders, such as C catatonic, disorganized, paranoid, residual or differeno tiated schizophrenia; schizophreniform disorder; schizoo affective disorder; delusional disorder; brief psychotic Sdisorder; shared psychotic disorder; psychotic disorder SLO due to a general medical condition with delusions and/or hallucinations; mood disorders, such as depressive disorders e.g., dysthymic disorder or major depressive disorder; bipolar disorders, bipolar I disorder, bipolar II disorder, and cyclothymic disorder; mood disorder due to a general medical condition with depressive, and/or manic features;.
and substance-induced mood disorder; anxiety disorders, such as acute stress disorder, agoraphobia without history of panic disorder, anxiety disorder due to general medical condition, generalized anxiety disorder, obsessive-compulsive disorder, panic disorder with agoraphobia, panic disorder without agoraphobia, posttraumatic stress disorder, specific phobia, social phobia, and substance-induced anxiety disorder; eating disorders, such as anorexia nervosa, bulimia nervosa, and obesitas; sleep disorders, such as dyssomnias, breathingrelated sleep disorder, circadian rhythm sleep disorder, hypersomnia, insomnia, narcolepsy, and "jet lag"; impulse-control disorders not elsewhere classified, such as intermittent explosive disorder, kleptomania, pathological gambling, pyromania, and trichotillomania; personality disorders, such as paranoid, schizoid or schizotypal disorder; antisocial, borderline, histrionic, and narcissistic disorder; and avoidant, dependent, obsessive-compulsive disorder; (C 14 S- medication-induced movement disorders, such as neuroleptic induced parkinsonism, neuroleptic malignant syn- 00 drome, neuroleptic induced acute and tardive dystonia, neuroleptic induced akathisia, neuroleptic induced tardive dyskinesia, medication induced tremor, and medication induced dyskinesias; o substance-related disorders, such as abuse, dependence, Sanxiety disorder, intoxication, intoxication delirium, psychotic disorder, psychotic disorder with delusions, S 10 mood disorder, persisting amnestic disorder, persisting <C dementia, persisting perception disorder, sexual dysfunction, sleep disorder, withdrawal, and withdrawal delirium due to use ore misuse of alcohol, amphetamine (or amphetamine-like substances), caffeine, cannabis, cocaine, hallucinogens, inhalants, nicotine, opioids, phencyclidine (or phencyclidine-like substances), sedative substances, hypnotic substances, and/or anxiolytic substances; disorders usually first diagnosed in infancy, childhood, or adolescence, such as mental retardation; learning disorders; motor skills disorders, e.g. developmental coordination disorder; communication disorders, e.g. expressive language disorder, phonological disorder, receptive-expressive language disorder and stuttering; pervasive developmental disorders, e.g. Asperger's disorder, autistic disorder, childhood disintegrative disorder, and Rett's disorder; attention-deficit and disruptive behavior disorders, e.g. attentiondeficit/hyperactivity disorder, conduct disorder, and oppositional defiant disorder; feeding and eating disorders of infancy or early childhood, e.g. feeding disorder of infancy or early childhood, pica, rumination disorder; tic disorders, e.g. chronic motor or vocal tic disorder, and Tourette's disorder; other disorders of infancy, childhood, or adolescence, e.g. selective mutism, and stereotypic movement disorder; 0c S- delirium, dementia, amnestic and other cognitive disor- Sders, such as Alzheimer's, Creutzfeldt-Jakob disease, 0 0 dead trauma, Huntington's disease, HIV disease, Pick's disease, and diffuse Lewy body dementia; conversion hysteria; (q conditions connected to normal aging, such as disturo bances in motor functions and mental functions; o Parkinson's Disease and related disorders, such as mul- VS tiple system atrophies, e.g. striatonigral degeneration, o 10 olivopontocerebellar atrophy, and shydrager syndrome; progressive supranuclear palsy; corticobasal degeneration; and vascular parkinsonism; tremors, such as essential, orthostatic, rest, cerebellar, and secondary tremor headaches, such as migraine, cluster headache, tension type headache, and paroxysmal headache; movement disorders, such as dyskinesias, e.g. in deneral medicine condition, secondary to trauma or vascular insult, hemiballism, athetosis, Sydenham's chorea, and paroxysmal; dystonias; Ekbom's syndrome (restless legs); Wilson's Disease; Hallerworden-Spatz disease; rehabilitation medicine, e.g. to improve rehabilitation after vascular or traumatic brain injury; pain in conditions characterized by increased muscular tone, such as fibromyalgia, myofascial syndrome, dystonia, and parkinsonism; as well as conditions related to the above that fall within the larger-categories but does not meet the criteria of any specific disorder within those categories.
Synthesis The synthesis of the present compounds is carried out by methods that are conventional for the synthesis of related known compounds. The syntheses of compounds in Formula 1, in general, comprise the reaction of an intermediate that supplies the alkyl group with an intermediin 0 0 16 Sate piperidine or piperazine that supplies the amine |group of Formula 2: 00 R1 8DNH (2) ci A convenient method of synthesis of the present com- 0 o pounds is by use of an alkyl iodide 1-propyliodide). Alternatively, other leaving groups besides iodide may be used on the alkyl group, of course, such as sulfonates, particularly methanesulfonate or toluenesulfonate, bromo and the like. The alkyl intermediate is reacted with the appropriate amine in the presence of any convenient acid scavenger. The usual bases such as alkali metal or alkaline earth metal carbonates, bicarbonates and hydroxides are useful acid scavengers, as are some organic bases such as trialkylamines and trialkanolamines. The reaction medium for such reactions may be any convenient organic solvent which is inert to the basic conditions; acetonitrile, esters such as ethylacetate and the like and halogenated alkane solvents are useful.
Usually the reactions will be carried out at elevated temperatures such as from ambient temperature to the reflux temperature of the reaction mixture, particularly from 50°C to about 100°C.
Another convenient method of synthesis of the present compounds involves reductive amination with an amine of Formula 2:
RI
QH c 17 D with an aldehyde or ketone, either in the presence of a Sreducing agent such as sodium cyanoborohydride or sodium 00 triacetoxyborohydride or followed by reduction, e.g. using catalytic hydrogenation, to give a corresponding compound of Formula 1.
eC Compounds of Fomula 3 o
RI
wherein X=N is accomplished by reacting compounds of Formula 4: R1 (I NH (4) with compounds of Formula z' NH where Z is a leaving group like iodide. Other leaving groups besides iodide may be used on the alkyl group, of course, such as sulfonates, particularly methanesulfonate or toluenesulfonate, bromo and the like. The alkyl intermediate is reacted with the appropriate amine in the presence of any convenient acid scavenger. The usual bases such as alkali metal or alkaline earth metal carbonates, bicarbonates and hydroxides are useful acid scavengers, as are some organic bases such as trialkylamines and trialkanolamines. The reaction is performed in a suitable solvent such as n-butanol by heating at about 50-1500C.
c9 18 SCompounds of the Formula 1 wherein X N is also ac- Scomplished by reacting compounds of Formula 6: 00 S(6) with an aryl substituted with a leaving group of Formula D 7: Z (7) where Z is halide e.g. chloro, bromo, iodo, or sulfonate e.g. -OSO 2
CF
3 or -OSO 2 F, in the presence of a base and a zerovalent transition metal catalyst such as Pd or Ni, according to known method (Tetrahedron Letters, vol 37, 1996, 4463-4466, J. Org. Chem., vol. 61, 1996, 1133- 1135).
The catalyst, preferably Pd will have the ability to form ligand complex and undergo oxidative addition. Typical Pd catalysts will be Pd 2 (dba) 3 (wherein dba refers to di-benzylidene acetone), Pd(PPh 3 4 Pd(OAc) 2 or PdC1 2 [P(o-tol) 3 ]2 and typical phosphine ligands will be BINAP, P(o-tol) 3 dppf, or the like. The usual bases such as alkali metal or alkaline earth metal carbonates, bicarbonates and alkyloxides are useful acid scavengers, as are some organic bases such as trialkylamines and trialkanolamines. The reaction medium for such reactions may be any convenient organic solvents, which are inert to the basic conditions; acetonitrile, toluene, dioxane, NMP (N-methyl-2-pyrrolidone), DME (dimethoxyethane), DMF (N,N-dimethylformamide), DMSO (dimethylsulfoxide) and THF (tetrahydrofuran) solvents are useful. Usually the reactions will be carried out at elevated temperatures such as from ambient temperature to the reflux temperature of 19 0 Cthe reaction mixture, particularly from 50 0 C to about 120 0
C.
0 Compounds of the Formula 1 wherein X N is also accomplished by reacting compounds of Formula 6 with an aryl substituted with a leaving group F or Cl) via nucleophilic aromatic displacement reactions in the preso ence of a base as explained above.
0 Compounds of the Formula 1 wherein X CH is also oaccomplished by transition metal catalyzed cross-coupling 0 reaction, known as, for example, Suzuki and Stille reacc-I tions, to those skilled in the art.
The reaction may be carried out between compounds of Formula 8:
Y
(8) wherein Y is, for example, a dialkylborane, dialkenylborane or boronic acid BEt 2
B(OH)
2 (dotted lines can be double bonds)) or a trialkyltin SnMe 3 SnBU 3 and an aryl substituted with a leaving group of Formula 7: Z(7) (for definition of Z, see above) in the presence of a base and a zerovalent transition metal catalyst such as Pd or Ni, according to known methods (Chem. Pharm. Bull., vol 33, 1985, 4755-4763, Am. Chem. Soc., vol. 109, 1987, 5478-5486., Tetrahedron Lett., vol. 33, 1992, 2199- 2202). In addition, Y can also be a zink- or magnesiumhalide group ZnC1 2 ZnBr 2 ZnI,, MgBr 2 MgI 2 according to known methods (Tetrahedron Lett., vol. 33, 1992, 5373-5374, Tetrahedron Lett., vol. 37, 1996, 5491-5494).
The catalyst, preferably Pd will have the ability to form ligand complex and undergo oxidative addition. The 0 C) definition of ligands, bases and solvents, is mentioned above.
00 Alternatively, the transition metal catalyzed crosscoupling reaction can be performed with the opposite substitution pattern: c-R o 1 with an heteroaryl/alkenyl substituted with an leaving group of Formula in the presence of a base and a zerovalent transition metal catalyst such as Pd or Ni, according known methods discussed in the previous paragraph.
Compounds of Formula 11:
RI
NH
I--
(11) can be prepared by catalytic hydrogenation of the tetrahydropyridine or pyridine from the previous paragraph, using standard methods known in the art, generally with palladium on carbon, Pt02, or Raney nickel as the catalyst. The reaction is performed in an inert solvent, such as ethanol or ethyl acetate, either with or without a protic acid, such as acetic acid or HCl. When the pyridine ring is quaternized with an alkyl group the ring can be partly reduced by NaBH 4 or NaCNBH 4 yielding the tetrahydropyridine analog which can further be reduced with catalytic hydrogenation.
CN 21 SAnother convenient method of syntheses of compounds Sof the Formula 1, wherein X CH is also accomplished by 0 treating arylhalides of Formula 7: Z (7) Cl n wherein 2 is Cl, Br, or I, with alkyllithium reagents, Sfor example, butyllithium, sec-butyllithium or tert- Cl butyl-lithium, preferably butyllitium or Mg (grignard reaction) in an inert solvent. Suitable solvents include, for example ether or tetrahydrofuran, preferably tetrahydrofuran. Reaction temperatures range from about -1100C to about 60°C. The intermediate lithium anions or magnesium anions thus formed may then be further reacted with a suitable electrophile of Formula 12: ta A (12) wherein A is defined as a protecting group like t-Boc (tert-butoxycarbonyl), Fmoc (fluorenylmethoxycarbonyl), Cbz (benzyloxycarbonyl) or a an alkylgroup like benzyl.
The intermediates of Formula 13: R1
OH
(13) which are formed require that the hydroxy group be removed so as to result in compounds of Formula 1 (X=CH).
This step may be accomplished by one of several standard methods known in the art. For example, a thiocarbonyl derivative (for example a xanthate) may be prepared and removed by a free radical process, of which are (c 22 0 Sknown to those skilled in the art. Alternatively, the hy- Sdroxyl group may be removed by reduction with a hydride 00 source such as triethylsilane under acidic conditions, using such as, for example, trifluoroacetic acid or boron h 5 trifluoride. The reduction reaction can be performed neat C or in a solvent, such as methylene chloride. A further O alternative would be to first convert the hydroxyl group C to a suitable leaving group, such as tosylate or chlo- 1 ride, using standard methods. The leaving group is then removed with a nucleophilic hydride, such as, for examc-I ple, lithium aluminium hydride. This last reaction is performed typically in an inert solvent, such as, ether or tetrahydrofuran.
Another alternative method for removing the hydroxyl group is to first dehydrate the alcohol to an olefin with a reagent such as Burgess salt Org. Chem., vol 38, 1973, 26) followed by catalytic hydrogenation of the double bond under standard conditions with a catalyst such as palladium on carbon. The alcohol may also be dehydrated to the olefin by treatment with acid such as ptoluenesulfonic acid or trifluoroacetic acid.
The protecting group, A, is removed under standard conditions known by those skilled in the art. For example, t-Boc cleavages are conveniently carried out with trifluoroacetic acid either neat or in combination with methylene chloride. F-moc is conveniently cleaved off with simple bases such as, ammonia, piperidine, or morpholine, usually in polar solvents such as DMF and acetonitrile. When A is Cbz or benzyl, these are conveniently cleaved off under catalytic hydrogenation conditions. The benzyl group can also be cleaved off under N-dealkylation conditions such as treatment with a-chloroethyl chloroformate Org. Chem., vol 49, 1984, 2081-2082).
It is further possible to convert a radical Ri in a compound of the Formula 1 into another radical R 1 e.g.
by oxidizing methylsulfide to methylsulfone (for example by m-chloroperoxybenzoic acid), substitution of a tri- S23 Sflate or halide group with a cyano group (for example palladium catalyzed cyanation), substitution of triflate 0O or halide group with a ketone (for example palladium catalyzed Heck reaction with butyl vinyl ether), substitution of a triflate or halide group with a carboxamide (N (for example, palladium catalyzed carbonylation), or o cleaving an ether by, for example, converting a methoxy Sgroup into the corresponding hydroxyl derivate, which can further be converted into the corresponding mesylate or o 10 triflate. The terms mesylate and triflate refers to OS02CH3, CH3SO 3 or OS0 2
CF
3
CF
3
SO
3 respectively.
In summary, the general process for preparing the present compounds has six main variations, which may briefly be described as follows: according to Scheme 1: R1 OH N R2 X=N, CH,orC X N,CH,orC X N, CH or C or according to Scheme 2: Reducing agent S(Y= independently
H
X N, CH, or C or small alkyl groups) X N, CH, or C or according to Scheme 3: Base zNH 2 z N.NH K.NH or according to Scheme 4:
RI
Nt~
INC
"Pd-catalys
RI
N ,R or according to Scheme orY Z or Y "Pd-catalysV' R1 cat hydrogen '14H Zis a leaving group; Y is Zn. MW. B~alkyl)2, B(OH)2 or Sn(alkyI)3) or according to Scheme 6: Ri radical ract.
RI
BUa r Mg 1 OH
N-
t A of A
RI
N
RI
OtX A (Z is CI, Br or 1) ddhYdMUM
RI
1. cat hydroge 2.cdavagsc&A 6A
RI
ckeaage of A As used herein the term C 1
-C
4 alkyl. refers to an alkyl containing 1-4 carbon atoms in any isomeric form. The various carbon moieties are defined as follows: Alkyl refers to an aliphatic hydrocarbon radical and includes branched or unbranched forms such as methyl, ethyl, npropyl, i-propyl, n-butyl, 1-butyl, s-butyl, t-butyl.
The term cycloalkyl refers to a radical of a saturated cyclic hydrocarbon such as cyclopropyl, cyclobutyl, cy- 00 clopentyl, cyclohexyl.
The term "Patient" used herein refers to an individual in need of the treatment according to the invention.
ON The term "treatment" used'-herein relates to both S treatment in order to cute or alleviate a disease or a condition, and to treatment in order to prevent the development of a disease or a condition. The treatment may either be performed in an acute or in a chronic way.
Ci Both organic and inorganic acids can be employed to form non-toxic pharmaceutically acceptable acid addition salts of the compounds according to the invention. illustrative acids are sulfuric, nitric, phosphoric, hydrochloric, citric, acetic, lactic, tartaric, palmoic, ethane disulfonic, sulfamic, succinic, cyclohexylsulfamic, fumaric, maleic, and benzoic acid. These salts are readily prepared by methods known in the art.
The pharmaceutical composition containing a compound according to the invention may also comprise substances used to facilitate the production of the pharmaceutical preparation or the administration of the preparations.
Such substances are well known to people skilled in the art and may for example be pharmaceutically acceptable adjuvants, carriers and preservatives.
In clinical practice the compounds used according to the present invention will normally be administered orally, rectally, or by injection, in the form of pharmaceutical preparations comprising the active ingredient either as a free base or as a pharmaceutically acceptable non-toxic, acid addition salt, such as the hydrochloride, lactate, acetate, sulfarnate salt, in association with a pharmaceutically acceptable carrier. The carrier may be a solid, 'semisolid or liquid preparation. Usually the active substance will constitute between 0.1 and 99% by weight of the preparation, more specifically between and 20% by a weight for preparations intended for injeco WO 01/46145 CI 26 tion and between 0'.2 and So% by weight for preparations suitable for oral administration.
00 To produce pharmaceutical .preparations containing the compound according to the invention in the form of dosage units for oral application, the selected compound may be mixed with a solid excipient, e.g. lactose, saco charose, sorbitol, mannitol, starches such as potato 0 starch, corn starch or amylopectin, cellulose derivatives, a binder such as gelatine or polyvinylpyrrolidine, and a lubricant such as magnesium stearate, CI calcium stearate, polyethylene glycol, waxes, paraffin, and the like, and then compressed into tablets. If coated tablets are required, the cores, prepared as described above, may be coated with a concentrated sugar solution which may contain e.g. gum arabic, gelatine, talcum, titanium dioxide, and the like. Alternatively, the tablet can be coated with a polymer known to the man skilled in the art, dissolved in a readily volatile organic solvent or mixture of organic solvents. Dyestuffs may be added to these coatings in order to readily distinguish between tablets containing different active* substances or different amounts of the active compound.
For the preparation of soft gelatine capsules, the active substance may be admixed with e.g. a vegetable oil or poly-ethylene glycol. Hard gelatine capsules may contain granules of the active substance using either the mentioned excipients for tablets e.g. lactose, saccharose, sorbitol, mannitol, starches potato starch, corn starch or amylopect in), cellulose derivatives or gelatine. Also liquids or semisolids of the drug can be filled into hard gelatine capsules.
Dosage units for rectal application can be solutions or suspensions or can be prepared in the form of suppositories comprising the active substance in a mixture with a neutral fatty base, or gelatine rectal capsules comprising the active substance in admixture with vegetable oil or paraffin oil. Liquid preparations for oral appli- 27 cation may be in the form of syrups or suspensions, for example solutions containing from about 0.2% to about 00 by weight of the active substance herein described, the balance being sugar and mixture of ethanol, water, glycerol and propylene glycol. optionally such liquid preparations may contain coloring agents, flavoring agents, saccharine and carboxymethylcellulose as a thickening Cl agent or-other excipients known to the man in the art.
o) Solutions for parenteral applications by injection can be prepared in an aqueous solution of a water-soluble pharmaceutically acceptable salt of the active substance, preferably in a concentration of from 0.5% to about by weight. These solutions may also containing stabilizing agents and/or buffering agents and may conveniently be provided in various dosage unit ampoules. The use and administration to a patient to be treated in the clinic would be readily apparent to an ordinary skill in the art.- In therapeutical treatment an effective amount or a therapeutic amount of the compounds according to the invention are from about 0.01 to about 500 mg/kg body weight daily, preferably 0.1-10 mg/kg body weight daily.
The compounds may be administered in any suitable way, such as orally or parenterally. The daily dose will preferably be administered in individual dosages 1 to 4 times daily.
it is known for those skilled in the art that replacing a hydrogen in a non-substituted position in the aromatic ring with a fluorine atom may block the possibility for enzymatic hydroxylation which render the compound low oral bicavailability. This type of exchange (H to F) seldom changes the pharmacological profile. Thus, it may-be important, in some cases to introduce a fluorine atom in any non-substituted positions in the aromatic ring of compounds of Formula I to improve the oral bioavai lability 28 1) The invention is further illustrated in the examples below, which in no way are intended to limit the scope of 00 the invention.
Example 1: 1- (3-Methanesulfonyl-phenvl) -4-propl piperazine o A suspension of 1-(3-methanesulfonyl-phenyl)- 0- piperazine (350 mg) and ground K 2 C0 3 (403 mg) was stirred o in CH 3 CN (25 mL) at room temperature. 1-Iodo-propane (712 o 10 pL) was added. The mixture was refluxed overnight. The reaction mixture was filtered and the volatiles were evaporated in vacuum. The oily residue was chromatographed on a silica column with MeOH:CH 2 Cl 2 (1:30 as eluent. Collection of the fractions containing pure product and evaporation of the solvent afforded pure 1- (3-methanesulfonyl-phenyl)-4-propyl-piperazine (220 mg).
The amine was converted into the HC1 salt and recrystallized from ethanol/diethylether: m.p. 233 0 C MS m/z (relative intensity, 70 eV) 282 30), 254 253 (bp), 210 70 (21).
The following compounds according to Examples 2 11 were prepared in a manner similar to the one described in Example 1.
Example 2: 1-Propvl-4- (3-Trifluoromethanesulfonylphenyl) -piperazine MS m/z (relative intensity, 70 eV) 336 16), 307 77 70 56 (23).
Example 3: 1- 3-(4-Propyl-viperazin-l-vl) -phenyllethanone Beginning with 1- (3-Piperazin-1-yl-phenyl)-ethanone and n-Pr-I: m.p. 119 0 C (oxalate), MS m/z (rel. intensity, 70 eV) 246 10), 217 132 70 56 Rf 0.23 (EtOAc).
(N 29 Exanmle 4: 1-Pr-opvl-4- (3-trifluoromnethl-hell) pineridine 00 Beginning with 4-(3-Trifluoromethyl-pheli)piperidine and n-Pr-I: nip. 1950C (Rd1), MS m/z (rel. intensity, 70 eV) 271 (M'fl, 243 242 159 70 (49).
Exanmle 5: 1-Butvl-4--(3-trifluoromethl-helVl) o piperidine o io Beginning with 4-(3--Trifluorornethyl-pheflyl)piperidine and n-Eu-Br: rn.p. 222 00 (gSd), MS m/z (rel.
intensity, 70 eV) 285 243 242 (bp) (51) 56 (17).
is Example 6: 4- (3-MethanesulfonYI.-n-helvl) -1-pronvidineer rn-p. 2000C (HC1) MS m/z (relative intensity, 70 eV) 281 252 129 115 70 Example 7: (3-Methanesulfonyl--Pheyl) -i-nRropvl-1.2,3,6tetrahy-dro-ny-ridile -Beginning -with- 4 -+(3-methanesulfolyl -phenl-) 6tetrahydro-pyridine and jodopropane: MS m/z (relative intensity 1 70 eV) 279 26), 250 171 128 115 Example 8: 4- (3-Methanesulfoflyl-Vhelyl) ethylpineri dine.
Beginning with 4- (3-methanesulfonyl-pheniyl) piperidine and iodoethane: m.p. 158 00 (1101). MS rn/z (rel. intensity, 70 eV) 267 20), 252 130 115 84 (20) Examle 9: 1-Isopronvl-4- (3-methanesulfonyl-Dheyl) pineridine Beginning with 4- (3 -methanesulfonyl-phenyl) piperidine and i-propylbronide: m.p. 220 00 MS m/z c S(rel. intensity, 70 eV) 281 266 187 C129 115 00 Example 10: 4- (3-Methanesulfonvl-phenvl)-1-butvlpiperidine eC Beginning with 4-(3-methanesulfonyl-phenyl)- Spiperidine and n-BuCl. MS m/z (rel. intensity, 70 eV) 295 o 252 130 115 70 ci o 10 Example 11: l-Isobutvl-4-(3-methanesulfonyl-phenvl)-
C
N piperidine Beginning with 4-(3-methanesulfonyl-phenyl)piperidine and i-butylbromide; m.p. 212 OC (HC1); MS m/z (rel. intensity, 70 eV) 295 252 129 115 70 (bp).
Example 12: 3- (l-Propyl-piperidin-4-vl)-benzonitrile A solution of 3-(l-propyl-piperidin-4-yl)-benzamide (350 mg) and POC1 3 (326 gL) in dry DMF (6 ml) was heated at 80°C for 3 h under an argon atmosphere. Evaporation of the solvent yielded a dark, oily residue, which was dissolved in water. The solution was basified and extracted with CH 2 C1 2 The combined organic phases were dried (MgSO 4 filtered and evaporated. The oily residue was chromathographed on a silica column with MeOH:CH 2 C1 2 (1:19 as eluent. Collection of the fractions containing pure product and evaporation of the solvent afforded pure 3-(l-Propyl-piperidin-4-yl)-benzonitrile (127 mg). The amine was converted into the fumarate salt and recrystallized from ethanol/diethylether: m.p. 122 0 C; MS m/z (relative intensity, 70 eV) 228 199 129 70 (bp) 56 (53).
Example 13: 1-sec-Butvl-4-(3-methanesulfonvl-phenvl)piperidine 4-(3-methanesulfonyl-phenyl)-piperidine hydrochloride (20 mg), glacial acetic acid (4.4 mg) and 2-butanone 0c 31 S(5.1 mg) were mixed in 1,2-dichloroethane (5 mL). Sodium Striacetoxyborohydride (23.5 mg) was added to the solution 00 and the reaction mixture was stirred at room temperature under a nitrogen atmosphere for 5 h analysis indicated a complete reaction). The reaction was quenched C( with saturated aqueous NaHCO 3 and the product was exo tracted with CH 2 Cl 2 The combined organic phases were Sdried (MgS04), filtered, and the solvent was evaporated kn to afford l-sec-butyl-4-(3-methanesulfonyl-phenyl)o 10 piperidine as an oily residue. The product was chromatoc graphed on a silica column with CH 3 Cl 2 :MeOH (9:1 as eluent. Collection of the fractions containing pure product and evaporation of the solvent afforded pure amine mg, MS m/z (relative intensity, 70 eV) 295 280 266 187 129 Example 14: Methanesulfonic acid 3-(l-proyvl-piperidin-4yl)-phenyl ester A solution of 3-(1-propyl-piperidin-4-yl)-phenol (340 mg) and triethylamine (187 mg) in 20 ml of CH 2 C1 2 was cooled to 0 C. Then methanesulfonyl chloride (194 mg) dissolved in 10 ml of CH2C1 2 was added dropwise. The reaction mixture was allowed to reach room temperature and then stirred for 2.5 h at 25 oC. The reaction was finally quenched with water. The organic layer was separated and washed with 10% HCI and then 10% Na 2
CO
3 After drying (MgS0 4 the solvent was removed under reduced pressure. The residue was chromathographed on a silica column using MeOH:CH 2 CI2 (1:9 as eluent. The fractions containing pure methanesulfonic acid 3-(1propyl-piperidin-4-yl)-phenyl ester were collected, and the solvent was removed in vacuum, affording 206 mg of the title compound. (MS m/z (rel. intensity, 70 eV) 297 268 189 131 79 (16); in Cy 32 SThe following compounds in Examples 15 19 were Sprepared in a manner similar to the one described in Ex- 00 ample 14.
Example 15: Methanesulfonic acid 3-(1-ethyl-piperidin-4- C vyl)-phenvl ester o Beginning with 3-(1-ethyl-piperidin-4-yl)-phenol and O methanesulfonyl chloride. MS m/z (rel. intensity, 70 eV) It 283 268 189 131 79 CD C Example 16: Methanesulfonic acid 3-(1-butvl-piperidin-4yl)-ohenyl ester Beginning with 3-(1-butyl-piperidin-4-yl)-phenol and methanesulfonyl chloride. MS m/z (rel. intensity, 70 eV) 311 268 189 131 79 (12); Example 17: Methanesulfonic acid 3-(4-propvl-piperazin-lyl)-phenvl ester Beginning with 3-(4-propyl-piperazin-l-yl)-phenol and methanesulfonyl chloride: m.p 143-144 OC (fumarate); MS m/z (rel. intensity, 70 eV) 298 35), 269 121 84 .(30),70 (bp); Example 18: Trifluoro-methanesulfonic acid 3-(1-DropYvlpiperidin-4-vll-phenvl ester Beginning with 3-(1-propyl-piperidin-4-yl)-phenol and triflic anhydride MS m/z (rel. intensity, 70 eV) 351 322 189 131 69 (bp).
Example 19: Trifluoro-methanesulfonic acid 3-(1-ethylpiperidin-4-yl)-phenvl ester Beginning with 3-(l-ethyl-piperidin-4-yl)-phenol and triflic anhydride: MS m/z (rel. intensity, 70 eV) 337 322 189 131 69 (bp).
SWO 01/46145 PCT/SEOO/02674 S33 SExamle 20 1- 3-(l-Propyl-piperidin-4-vl)-phenvllethanone 0 To a stirred solution of trifluoro-methanesulfonic acid 3-(l-propyl-piperidin-4-yl)-phenyl ester (300 mg) in DMF (4 ml) under argon atm at r.t. was subsequently added Cl NEt 3 (356 butyl vinyl ether (823 gL), 1,3o bis(diphenylphosphino)propane (50 mg), and Pd(OAc) 2 (19 0 mg). The reaction mixture was then heated to 80 0 C and afn ter 2 h the reaction was stopped. 5 Hydrochloric acid solution (6 ml) was added and the combined mixture stirred for 45 min. Then CH 2 Ca1 was added and the phases were separated. The aqueous layer was then extracted with
CH
2 C12. The combined organic phases were dried (MgS04), filtered and evaporated to dryness. The crude product was purified by flash chromatography (MeOH:CH 2 C1, (1:9 Collection of the fractions containing pure product and evaporation of the solvent afforded pure 1-[3-(l-Propylpiperidin-4-yl)-phenyl]-ethanone (35 mg). MS m/z (rel.
intensity, 70 eV) 245 216 100 57 (13).
Examole 21: 1-Provpl-4- (3-trifluoromethvlsulfonylphenvl)- 1.2,3,6-tetrahydropvridine 4-(3-Trifluoromethylsulfonylphenyl)-Pyridine (0.3 g) was dissolved in l-iodo-propane (2 ml) and heated to 100°C for 2 h. Then the voilatiles were evaporated and the residue redissolved in abs EtOH (20 ml) and NaBH4 (340 mg) was addded portions wise at 20 0 C. The mixture was then allowed to reach r.t. and stirred over night. To the mixture was added 10% Na2CO 3 solution (20 ml). The aqueous layer was extracted with CHIC1 2 and the combined organic phases were dried (MgSO4), filtered and evaporated to dryness. The crude product was purified by flash chromatography (MeOH:CH 2 C1 2 (1:9 Collection of the fractions containing pure product and evaporation of the solvent afforded pure 1-propyl-4-(3-trifluoromethylsulfonylphenyl)-1,2,3,6-tetrahydropyridine (150 mg). MS 34 m/z (rel. intensity, 70 eV) 333 21), 305 304 171 128 Rf 0.55 (MeOH) 00 Example 22: 1-Propvl-4(3-trifluoromethlsulfonylphenyl)piperidine CA Beginning with 1-propyl-4-(3-trifluoromethylo sulfonyl-phenyl)-1,2,3,6-tetrahydropyridine, 1-Propyl- 0 4 (3-trifluoro-methylulfonylphenyl)-piperidine was recovered by the procedure described in Preparation 9. MS m/z o 10 (relative intensity, 70 eV) 335 307 306 173 70 Example 23: 1-Allyl-4-(3-methanesulfonyl-phenvl)- Diperidine Beginning with 4-(3-methanesulfonyl-phenyl)piperidine and allylbromide, the titled compound was recovered by the procedure described in Example 1. MS m/z (relative intensity, 70 eV) 279 74), 96 82 68 55 Rf 0.42 (MeOH, 0.08 (EtOAc).
Example 24: 4-(3-Methanesulfonvl-phenyl)-1-(tetrahydrofuran-2-v-methyl)-nineridine Beginning with 4-(3-methanesulfonyl-phenyl)piperidine and tetrahydrofurfuryl chloride, the titled compound was recovered by the procedure described in Example 1. MS m/z (relative intensity, 70 eV) 323 1), 252 129 115 70 Rf 0.3 (MeOH, 0.03 (EtOAc).
Syntheses of intermediates used in the above Examples are described in the preparations below.
Preparation 1: 4-Hydroxy-4-(3-methylsulfanyl-phenyl)piperidin-1-carboxylic acid tert-butyl ester 1-Bromo-3-methylsulfanyl-benzene (5.0 g, 24.6 mmol) was dissolved in dry THF (40 ml) and cooled to -780C under a stream of Argon n-BuLi (12.8 ml, 2.5 M in hexo ci D ane, 31.9 mmol) was added dropwise via syringe and the Sreaction mixture was stirred for an additional 30 min at OO -78 0 C, then the temperature was increased to 0°C for min and then decreased to -780C. l-tert-Butoxycarbonyl-4piperidone (5.4 g, 27.06 mmol) dissolved in dry THF C ml) was added via syringe. The reaction mixture was alci lowed to reach room temperature and then stirred for 1 o hour, and finally quenched with saturated ammonium chloride solution (30 ml). The mixture was extracted several o 10 times with EtOAc and the combined organic phases were Cq dried (MgSO4), filtered and evaporated to dryness. The oily residue was chromatho-graphed on a silica column using CH 2 C1 2 :MeOH (19:1 as eluent, yielded 4-hydroxy- 4-(3-methylsulfanyl-phenyl)-piperidin-1-carboxylic acid tert-butyl ester (6 g, 76 MS m/z (relative intensity, eV) 323.1 223.0 178.0 152 57.0 56 Preparation 2: 1-Benzvl-4-(3-methoxv-phenvl)-piperidin-4ol Beginning with 3-bromoanisole (5 g) and l-benzyl-4piperidone (5.5 4.58 g of l-benzyl-4-(3-methoxyphenyl)-piperidin-4-ol was recovered by the procedure described in Preparation 1. MS m/z (relative intensity, eV) 297 279 206 146 91 (bp).
Preparation 3: 1-Benzvl-4-(3-trifluoromethvl-phenvl)piperidin-4-ol Beginning with 3-trifluoromethyl-iodobenzene (3 g) and l-benzyl-4-piperidone (2.1 1.75 g of the title compound was recovered by the procedure described in preparation 1. MS m/z (rel. intensity, 70 eV) 335 29), 244 146 91 56 (19).
c4 36 e Preparation 4: 4-(3-Methvlsulfanl -phenvl)- 12.3,6- 1 tetrahydro-pvridine 00 4-Hydroxy-4-(3-methylsulfanyl-phenyl)-piperidin-1carboxylic acid tert-butyl ester (3.97 g) was dissolved in CH 2 C1 2 (500 ml) and trifluoroacetic acid (80 ml) was (q added in one portion. The mixture was refluxed for one o hour and then washed with two portions, of 10%-Na 2 C0 3 O dried (MgSO 4 filtered and evaporated to dryness. Yield V 2.07 g. MS m/z (relative intensity, 70 eV) 205 73), o 10 158 129 128 82 (bp).
Preparation 5: l-Benzvl-4-(3-methoxv-Dhenvl)-1.2,3,6tetrahydro-vpridine Beginning with l-Benzyl-4-(3-methoxy-phenyl)piperidin-4-ol (4.5 g) and trifluoroacetic acid (80 ml), g of l-benzyl-4-(3-methoxy-phenyl)-1,2,3,6tetrahydro-pyridine was recovered by the procedure described in Preparation 4. MS m/z (relative intensity, eV) 279 35), 145 115 91 65 (22).
Preparation 6: 1-Benzyl-4-(3-trifluoromethyl-phenvl)- 1.2.3.6-tetrahvdro-pyridine Beginning with l-Benzyl-4-(3-trifluoromethylphenyl)-piperidin-4-ol (1.74 1.44 g of the title compound was recovered by the procedure described in preparation 4 (neat CF3COOH). MS m/z (rel. intensity, 70 eV) 317 71), 226 172 91 65 (17).
Preparation 7: 4-(3-Methylsulfanvl-phenyl)-3.6-dihydro- 2H-pvridine-l-carboxvlic acid methyl ester 4-(3-Methylsulfanyl-phenyl)-1,2,3,6-tetrahydropyridine (2 g) and NEt3 (1 g) were dissolved in CH 2 C12 ml) and cooled to 0°C. Methyl chloroformate (0.96 g) dissolved in CH 2 C12 (20 ml) was added dropwise and the reaction mixture was then allowed to reach room temperature.
After an additional two hours at room temperature the reaction mixture was washed with 10% Na 2
CO
3 solution, dried Cl 37 O (MgS04), filtered and concentrated by evaporation. The Soily residue was chromatographed on a silica column using 0_
CH
2 C1 2 :MeOH (19:1 as eluent, 4-(3-methylsulfanylphenyl)-3,6-dihydro-2H-pyridine-l-carboxylic acid methyl ester (1.4 MS m/z (relative intensity, 70 eV) 263 (M+ 45), 248 129 128 59 (96).
^C Preparation 8: 4- (3-Methanesulfonvl-phenvl) 6-dihvdroo .2H-ovridine-l-carboxylic acid methyl ester o 10 4-(3-Methylsulfanyl-phenyl)-3,6-dihydro-2H-pyridine- Cl 1-carboxylic acid methyl ester (1.4g) was dissolved in CH2C1 2 (150 ml) and cooled to 0°C. m-Chloroperoxybenzoic acid (2.48 g) was added portions wise and the mixture was stirred at room temperature for three hours. The resulting clear solution was washed with 10%-Na 2 CO3 solution, dried (MgSO4), filtered and concentrated by evaporation and yielding an oily residue (1.3 MS m/z (relative intensity, 70 eV) 295 19), 280 129 128 59 (bp).
Preparation 9: 4-(3-Methanesulfonvl-phenvl)-piperidin-lcarboxvlic acid methyl ester 4-(3-Methanesulfonyl-phenyl)-3,6-dihydro-2Hpyridine-1-carboxylic acid methyl ester (2.0 g) was dissolved in methanol (40 ml). Concentrated hydrochloric acid (2 ml) and Pd/C (500 mg) were added. The resulting mixture was hydrogenated under a hydrogen gas pressure psi) for 8 h and then filtered through a pad of celite. The solvent was evaporated in vacuum and the residue was purified by flash chromatography
(CH
2 C1 2 MeOH, 3:1 Yield 0.92 g MS m/z (relative intensity, eV) 297 54), 282 238 115 56 (93).
Preparation 10; 4-(3-Methoxv-phenyl)-piperidine Beginning with 1-Benzyl-4-(3-methoxy-phenyl)- 1,2,3,6-tetrahydro-pyridine (5.1 g) and 900 mg Pd/C, 1.7 g of 4 -(3-Methoxy-phenyl)-piperidine was recovered by the c 38 procedure described in Preparation 9. The oily residue Cwas purified by flash chromatography (SiO2, CH 2 Cl 2 :MeOH, 00 3:1 with 1 NEt 3 to give the pure title compound.
MS m/z (relative intensity, 70 eV) 191 75), 160 83 57 56 (bp).
ci o Preparation 11: 4-(3-Trifluoromethyl-phenyl -piperidine o Beginning with 1-Benzyl-4-(3-trifluoromethyln phenyl)-1,2,3,6-tetrahydro-pyridine (1.44 1 g of the title compound as HC1 salt was recovered by the procedure described in preparation 9. m.p. 202°C (HC1); MS m/z (rel. intensity, 70 eV) 229 44), 228 83 (12), 57 56 (bp).
Preparation 12: 4-(3-Methanesulfonvl-phenvl-piperidine 4-(3-Methanesulfonyl-phenyl)-piperidin-1-carboxylic acid methyl ester (0.92 g) dissolved in ethanol (15 ml) and 8 M HC1 (40 ml) was refluxed for 12 hours. The mixture was then evaporated in vacuum to dryness. Yield 0.85 g MS m/z (relative intensity, 70 eV) 239 59), 238 69 57 56 (bp).
Preparation 13: 3-Piperidin-4-vl-phenol.
4-(3-Methoxy-phenyl)-piperidine (1.7 g) was dissolved in 48-% HBr (60 ml) and stirred at 120 OC under an Argon-atmosphere for 3 h. The excess of HBr was then evaporated and absolute ethanol added and evaporated.
This procedure was repeated several times to yield dry crystals of 3-piperidin-4-yl-phenol x HBr (2.3 MS m/z (relative intensity, 70 eV) 177 bp), 176 91 57 56 Preparation 14: 3-(l-Propyl-piperidin-4-yl)-phenol x HBr Beginning with 3-piperidin-4-yl-phenol x HBr (300 mg) and n-propyl iodide (200 mg), 340 mg of 3-(1-propylpiperidin-4-yl)-phenol was recovered by the procedure described in Example 1. The HBr salt was prepared to pro- ^c 39 vide the title compound. MS m/z (rel. intensity, 70 eV) S219 21), 190 119 91 70 m.p.
o 0 181-184 OC (HBr).
Preparation 15: 3-(l-Ethyl-DiDeridin-4-yl) -phenol C( Beginning with 3-piperidin-4-yl-phenol x HBr (200 0 mg) and Ethyl iodide (121 mg), 120 mg of 3-(l-ethyl- C piperidin-4-yl)-phenol was recovered by the procedure de- V scribed in Example 1. MS m/z (rel. intensity, 70 eV) 205 I 12), 190 119 91 70 (87).
preparation 16; 3- (-Butvl-Diperidin-4-vl) -phenol Beginning with 3-piperidin-4-yl-phenol x HBr (200 mg) and n-butyl chloride (73 mg), 118 mg of 3-(1-butylpiperidin-4-yl)-phenol was recovered by the procedure described in Example 1. MS m/z (rel. intensity, 70 eV) 233 190 119 91 70 preparation 17: 1-(3-Methanesulfonvl-phenvl) -iperazine A mixture of l-bromo-3-methanesulfonyl-benzene piperazine (1 sodium tert-butoxide (0.5 g) SBINAP (42 mg)- and -[Pd 2 -(dba)- 3 (38 mg). in toluene (7 ml) was heated under argon at 80 oC for 24 h. After cooling to roomtemperature, the solvent was evaporated to dryness.
The crude material was purified by flash chromatography on silica gel using EtOAc. Yield 0.48 g: MS m/z (rel. intensity, 70 eV) 240 17), 199 198 119 56 Preparation 18: 1-(3-Trifluoromethanesulfolnvl-henvl) piperazine Beginning with 3-bromo-trifluoromethanesulfonylbenzene and piperazine, the titled cmp was recovered by the procedure described in Preparation 17. MS m/z (rel.
intensity, 70 eV) 294 22), 252 119 104 56 (c Preparation 19: 1-(3-Piperazin-1-vl-phenvl)-ethanone SBeginning with 3-bromo-acetophenone and piperazine, O0 the titled cmp was recovered by the procedure described in Preparation 17. MS m/z (rel. intensity, 70 eV) 204 162 77 57 56 (bp).
ci o Preparation 20: 3-(l-Propvl-piperidin-4-vl)-benzoic acid o methyl ester tlV A mixture of trifluoro-methanesulfonic acid 3-(1propyl-piperidin-4-yl)-phenyl ester (1.2 triethyl C amine (0.9 MeOH (5.4 ml), Pd(OAc) 2 (25 mg) and 1,3bis(di-phenyl-phosphino)propane (45 mg) in 15 ml DMSO was stirred at room temperature for 15 min. A stream of CO was passed through the solution for 4-5 min., and then the reaction vessel was placed under a sligthly positive pressure of CO The temp was increased to 0 C. After 6h the reaction was allowed to cool to r.t.
Water was then added, and the aqueous solution was extracted with five portions of ethyl acetate and the combined organic phases were dried (MgSO4), and evaporated.
The residue was chromathographed on a silica column using MeOH: CH 2 C1 2 (1:9 as eluent. The fractions containing pure titled compound were collected, and the solvent was removed in vacuum, affording 650 mg of the titled compound. (MS m/z (rel. intensity, 70 eV) 261 233 232 161 70 Preparation 21: 3-(l-Propyl-piperidin-4-yl)-benzamide A solution of 3-(l-Propyl-piperidin-4-yl)-benzoicacid methyl ester (0.6 g) and formamide (320 IL) in DMF (9 ml) was heated to 100 OC under a blanket of argon. Sodium methoxide in methanol 770 pL) was added dropwise and after Ih, GC analysis revealed the complete absence of starting material and indicated the titled compound as the sole product. After cooling, CH 2
C
2 was added and the resulting solution was filtered through a pad of celite and evaporated to dryness. The residue was chroin 41 Smathographed on a silica column using MeOH: CH 2 C12 (1:3 as eluent. The fractions containing pure titled 0 0 compound were collected, and the solvent was removed in vacuum, affording 400 mg of the titled compound, m.p.
182°C (oxalate) (MS m/z (rel. intensity, 70 eV) 246 Cl 217 131 100 70 (63).
1D 0 O preparation 22: 4-(3-Trifluoromethvlsulfonyl-phenyl)o npvridine S 10 1-Bromo-3-trifluoromethylsulfonyl benzene (580 mg) Cl and 4-pyridine-boronic acid (275 mg) was dissolved in toluene (5 ml) and abs EtOH (5 ml). To the mixture was then added Na 2 C03 (424 mg) and Pd(PPh 3 4 (119 mg) under an atmosphere of Argon. The resulting mixture was heated to 90 °C for 18 h. Then CH 2 C12 was added and the organic phase was washed with water and dried (MgS0 4 filtered and evaporated to dryness. The residue was then used without any further purification. (MS m/z (rel. intensity, 70 eV) 287 33), 218 154 127 (56), 69 (27).
The following tests were used for evaluation of the compounds according to the invention.
In vivo test: Behavior For behavioral testing, the animals were placed in separate motility meter boxes 50X50X50 cm equipped with an array of 16x16 photocells (Digiscan activity monitor, RXYZM (f6) TAO, Omnitech Electronics, USA), connected to an Omnitech Digiscan analyzer and a Apple Macintosh computer equipped with a digital interface board (NB DIO-24, 'National Instruments, USA). Behavioral data from each motility meter box, representing the position (center of gravity) of the animal at each time, were recorded at a sampling frequency of 25 Hz and collected using a custom written LABView M application. The data from each recording session were analyzed with respect to distance trav- S42 Seled and small-scale movements, e.g. stops in the center Sof the behavior recording arena, during the recording 00 session. To determine stops in the center, velocity at each time point is calculated as the distance traveled since the preceding sample divided by the time elapsed C since the preceding sample. The number of stops is then calculated as the number of times that the velocity 0 changes from a non-zero value to zero. The number of l stops in the center of the behavioral recording arena is calculated as the number of stops occurring at a position C at least ten centimeters from the edges of the recording arena. For behavioral testing of habituated rats, the animals were placed in the motility meter boxes 30 minutes before the administration of'test compound. Each behavioral recording session lasted 60 or 30 minutes, starting immediately after the injection of test compound. Similar behavioral recording procedures was applied for non-habituated rats, habituated rats and drug pre-treated rats. Rats pre-treated with d-amphetamine are given the dose 1,5 mg/kg s.c. 5 min before the behavioral session in the motility meter. Rats pre-treated with dizolcipine (Mk-801) are given the dose 0,7 mg/kg i.p. min before the behavioral session in the motility meter.
In vivo test: Neurochemistry After the behavioral activity sessions the rats were decapitated and their brains rapidly taken out and put on an ice-cold petri-dish. The limbic forebrain, the striatum, the frontal cortex and the remaining hemispheral parts of each rat were dissected and frozen. Each brain part was subsequently analyzed with respect to its content of monoamines and their metabolites. The monoaminergic indices analyzed were dopamine 3,4-dihydroxyphenylacetic acid (DOPAC), homovanillic acid (HVA), 3methoxytyramine serotonin acetic acid (5-HIAA), and noradrenaline All monoaminergic indices in the dissected tissue were analyzed CI 43 by means of HPLC with electrochemical detection as described by Svensson K, et al. 1986, Naunyn- 00 Schmiedeberg's Arch Pharmacol 334: 234-245 and references cited therein.
CI In vivo test: Pharmacokinetics in the rat o To determine oral availability and plasma half 0q life (tl/2) of test compounds according to the invention Vexperiments performed in the rat were undertaken. On day 0 one rats were implanted with one catheter in the jugular vein and one catheter in the carotid artery under ketamine anesthesia. On day three test compound is injected either orally or in the jugular vein catheter. Blood samples are collected during 8 hours from the arterial catheter. The blood samples were heparinized and centrifuged. Plasma is collected from the centrifuged samples and frozen. The levels of test compound were subsequently determined in each sample by means of gas chromatographymass spectrometry (Hewlett-Packard S972MSD). The plasma samples, taken from the rats of the Sprague-Dawley strain, (0.5 ml) were diluted with water (0.5 ml), and pmol (50 Al) of ((-)-S-3-(3-Ethylsulfonylphenyl)-N-npropyl-piperidine as internal standard was added. The pH was adjusted to 11.0 by the addition of 25 Al saturated Na 2
CO
3 After mixing, the samples were extracted with 4 ml dichloromethane by shaking for 20 min. The organic layer was, after centrifugation, transferred to a smaller tube and evaporated to dryness under a stream of nitrogen and subsequently redissolved in 40 Al toluene for GC-MS analysis. A standard curve over the range of 1-500 pmol was prepared by adding appropriate amounts of test compound to blank plasma samples. GC was performed on a HP- Ultra 2 capillary column (12m x 0.2 mm ID), and 2 Al was injected in the splitless mode. The GC temperature was held at 90 0 C for 1 minute following injection, and was then increased by 300C/min to the final temperature of 2900C. Each sample was run in duplicate. The lowest de- 44 o tectable concentration of test compound was generally Cl found to be 1 pmol/ml.
In the claims which follow and in the preceding Sdescription of the invention, except where the context 5 requires otherwise due to express language or necessary implication, the word "comprise" or variations such as "comprises" or "comprising" is used in an inclusive sense, C. ie. to specify the presence of the stated features but not to preclude the presence or addition of further features in various embodiments of the invention.
C" It is to be clearly understood that although Sprior art publication(s) are referred to herein, this reference does not constitute an admission that any of these documents forms part of the common general knowledge in the art in Australia or in any other country.
H.nMRIKKcpcSp-ci\P5592, doc I1DO3/05

Claims (48)

1. A 3-substituted 4-(phenyl-N-alkyl)-piperazine Scompound of Formula 1: IO R1 (NN R 2 o wherein: o Ri is selected from the group consisting of OSO 2 CF 3 OS0 2 CH 3 SO2R 3 COCF 3 COCH 3 and COCH 2 CH 3 wherein R 3 is as defined below; R 2 is selected from the group consisting of CI-C 4 alkyls, allyl, CH 2 CH20CH 3 CH 2 CH 2 CH 2 F, CH2CF 3 3,3, 3-trifluoropropyl and 4,4,4-trifluorobutyl; R 3 is selected from the group consisting of C 1 -C 3 alkyls, CF3, and N(CH 3 2 with the proviso that when Ri is S0 2 R 3 and R 3 is a Ci-C 3 alkyl, then R 2 is not CH 2 CH 2 OCH 3 or a pharmaceutically acceptable salt thereof.
2. A compound according to claim 1, wherein Ri is selected from the group consisting of OS0 2 CF 3 OSO 2 CH 3 SO 2 CH 3 SO 2 CF 3 COCH 3 and SO 2 N(CH 3 2
3. A compound according to claim 1 or claim 2, wherein R 2 is selected from the group consisting of n- propyl and ethyl.
4. A pharmaceutical composition comprising a compound according to any one of the claims 1 3 and one or more pharmaceutically acceptable carriers or diluents. A pharmaceutical composition according to claim 4, for treatment of a condition selected from the group consisting of iatrogenic and non-iatrogenic Parkinsonism, dyskinesias, dystonias and Tourette's disease.
H.M.raR\ccKplSpcciP55925 doc 16/03/05 46 o
6. A pharmaceutical composition according to claim C(N 4, for treatment of Parkinson's disease.
7. A pharmaceutical composition according to claim S4, for treatment of a condition selected from the group \O 5 consisting of iatrogenic and non-iatrogenic psychoses and hallucinoses.
8. A pharmaceutical composition according to claim 4, for treatment of a condition selected from schizophrenia and schizophreniform disorders.
9. A pharmaceutical composition according to claim fl 4, for treatment of a condition selected from the group Sconsisting of mood and anxiety disorders.
10. A pharmaceutical composition according to claim 9, wherein said mood and anxiety disorders is selected from manodepressive illness, depression and obsessive- compulsive disease.
11. A pharmaceutical composition according to claim 4, for treatment of a condition selected from the group consisting of attention-deficit disorders, autism disorders and cognitive dysfunctions.
12. A pharmaceutical composition according to claim 4, for treatment of Huntington's disease.
13. A pharmaceutical composition according to claim 4, for treatment of a sleep disorder.
14. A pharmaceutical composition according to claim 4, for treatment of a substance related disorder related to abuse of alcohol or an addictive drug.
A pharmaceutical composition according to any one of claims 4 14, formulated for oral administration.
16. A pharmaceutical composition according to claim formulated as a tablet.
17. A pharmaceutical composition according to claim formulated as a capsule.
18. A pharmaceutical composition according to any one of claims 4 14, formulated for administration by injection. H \tI.R\KccpSpDA\P55925 doc 1603MO 47 o
19. Use of a compound according to any one of the (C claims 1 3 for the manufacture of a pharmaceutical composition for treatment of a condition selected from the Sgroup consisting of iatrogenic and non-iatrogenic I\ 5 Parkinsonism, dyskinesias, dystonias and Tourette's disease.
Use of a compound according to any one of the -ON claims 1 3 for the manufacture of a pharmaceutical 1 composition for treatment of Parkinson's disease.
21. Use of a compound according to any one of the fl claims 1 3 for the manufacture of a pharmaceutical Scomposition for treatment of a condition selected from the group consisting of iatrogenic and non-iatrogenic psychoses and hallucinoses.
22. Use of a compound according to any one of the claims 1 3 for the manufacture of a pharmaceutical composition for treatment of a condition is selected from schizophrenia and schizophreniform disorders.
23. Use of a compound according to any one of the claims 1 3 for the manufacture of a pharmaceutical composition for treatment of a condition selected from the group consisting of mood and anxiety disorders.
24. Use according to claim 23, wherein said mood and anxiety disorders is selected from manodepressive illness, depression and obsessive-compulsive disease.
Use of a compound according to any one of the claims 1 3 for the manufacture of a pharmaceutical composition for treatment of a condition selected from the group consisting of attention-deficit disorders, autism disorders and cognitive dysfunctions.
26. Use of a compound according to any one of the claims I 3 for the manufacture of a pharmaceutical composition for treatment of a sleep disorder.
27. Use of a compound according to any one of the claims 1 3 for the manufacture of a pharmaceutical composition for treatment of Huntington's disease. H ,r,,RIKKpXSpA\PSSflS d-c lbCMOS 48 o
28. Use of a compound according to any one of the C< claims 1 3 for the manufacture of a pharmaceutical composition for treatment of a substance related disorder Srelated to abuse of alcohol or an addictive drug. \D 5
29. A method for treatment of a condition selected from the group consisting of iatrogenic and non-iatrogenic Parkinsonism, dyskinesias, dystonias and Tourette's -ON disease, wherein a pharmaceutically active amount of a 8- 1 compound according to any one of the claims 1 3 is administered to a patient. If
30. A method for treatment of Parkinson's disease, Swherein a pharmaceutically active amount of a compound according to any one of the claims 1 3 is administered to a patient.
31. A method for treatment of a condition selected from the group consisting of iatrogenic and non-iatrogenic psychoses and hallucinoses, wherein a pharmaceutically active amount of a compound according to any one of the claims 1 3 is administered to a patient.
32. A method for treatment of a condition selected from schizophrenia and schizophreniform disorders, wherein a pharmaceutically active amount of a compound according to any one of the claims 1 3 is administered to a patient.
33. A method for treatment of a condition selected from the group consisting of mood and anxiety disorders, wherein a pharmaceutically active amount of a compound according to any one of the claims 1 3 is administered to a patient.
34. A method according to claim 33, wherein said mood and anxiety disorders is selected from manodepressive illness, depression and obsessive-compulsive disease. A method for treatment of a condition selected from the group consisting of attention-deficit disorders, autism disorders and cognitive dysfunctions, wherein a pharmaceutically active amount of a compound according to any one of the claims 1 3 is administered to a patient.
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36. A method for treatment of Huntington's disease, wherein a pharmaceutically active amount of a compound taccording to any one of the claims 1 3 is administered Sto a patient. ID 5
37. A method for treatment of a sleep disorder, wherein a pharmaceutically active amount of a compound according to any one of the claims 1 3 is administered ON to said patient.
S138. A method for treatment of a substance related 10 disorder related to abuse of alcohol or an addictive drug, ci V) wherein a pharmaceutically active amount of a compound o according to any one of the claims 1 3 is administered i to said patient.
39. A method according to any one of the claims 29 38 wherein said compound is administered orally.
A method according to any one of the claims 29 38 wherein said compound is administered by injection.
41. A compound according to any one of claims 1 3, substantially as herein described.
42. A compound according to any one of claims 1 3, substantially as herein described with reference to any one of the Examples thereof.
43. A pharmaceutical composition according to any one of claims 4 18, substantially as herein described.
44. A pharmaceutical composition according to any one of claims 4 18, substantially as herein described with reference to any one of the Examples thereof.
Use according to any one of claims 19 28, substantially as herein described.
46. Use according to any one of claims 19 28, substantially as herein described with reference to any one of the Examples thereof.
47. A method according to any one of claims 29 substantially as herein described. HwaMraRKeep\SpeiT55Q25 dcc Ib01105 o
48. A method according to any one of claims 29 C( substantially as herein described with reference to any one of the Examples thereof. 0 5 Dated this 16th day of March 2005 A. CARLSSON RESEARCH AB By their Patent Attorneys GRIFFITH HACK "Fellows Institute of Patent and Trade Mark Attorneys of Australia ci H :\MarR\KCCp\SpccilP55925 do 16/03/05
AU2005200729A 1999-12-22 2005-02-18 New modulators of dopamine neurotransmission Ceased AU2005200729B2 (en)

Applications Claiming Priority (3)

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SE9904724 1999-12-22
AU25705/01A AU778422B2 (en) 1999-12-22 2000-12-22 New modulators of dopamine neurotransmission
PCT/SE2000/002674 WO2001046145A1 (en) 1999-12-22 2000-12-22 New modulators of dopamine neurotransmission

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