JP3665091B2 - Process for producing 17α-hydroxypregna-1,4,6-triene-3,20-dione - Google Patents
Process for producing 17α-hydroxypregna-1,4,6-triene-3,20-dione Download PDFInfo
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- JP3665091B2 JP3665091B2 JP20854294A JP20854294A JP3665091B2 JP 3665091 B2 JP3665091 B2 JP 3665091B2 JP 20854294 A JP20854294 A JP 20854294A JP 20854294 A JP20854294 A JP 20854294A JP 3665091 B2 JP3665091 B2 JP 3665091B2
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- PJERKBARHKFJRD-KQMXEUTGSA-N CC(CCC1C2(C)C=C3)(C(CC4)C1C=CC2=CC3=O)[C@]4(C(C)=O)O Chemical compound CC(CCC1C2(C)C=C3)(C(CC4)C1C=CC2=CC3=O)[C@]4(C(C)=O)O PJERKBARHKFJRD-KQMXEUTGSA-N 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/50—Improvements relating to the production of bulk chemicals
- Y02P20/55—Design of synthesis routes, e.g. reducing the use of auxiliary or protecting groups
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Description
【0001】
【産業上の利用分野】
本発明は、17α−ヒドロキシプレグナ−1,4,6−トリエン−3,20−ジオンの製造方法およびその中間体に関する。本発明により製造される17α−ヒドロキシプレグナ−1,4,6−トリエン−3,20−ジオンは、抗男性ホルモン剤として有用な酢酸ゲストロキサンの合成中間体として有用である。
【0002】
【従来の技術】
強い抗男性ホルモン剤として有用な化合物である酢酸ゲストロキサンは、17α−アセトキシプレグナ−1,4,6−トリエン−3,20−ジオンから容易に製造されることが知られている(特開昭61−204198号公報参照)。従来、17α−アセトキシプレグナ−1,4,6−トリエン−3,20−ジオンの製造方法としては、ドイツ特許出願公開明細書第1,119,226号に記載された17α−アセトキシプレグナ−4−エン−3−オンを原料とする方法が知られている。
【0003】
【発明が解決しようとする課題】
上記の文献には、生成物である17α−アセトキシプレグナ−1,4,6−トリエン−3,20−ジオンの収率は記載されていないが、ジャーナル オブ アメリカン ケミカル ソサエティー(Journal of American Chemical Society)、72巻、4534頁(1950年)に記載されている類似の反応例から推測すれば、その収率は低い。
【0004】
しかして、本発明の1つの目的は、酢酸ゲストロキサンの合成中間体として有用な17α−アセトキシプレグナ−1,4,6−トリエン−3,20−ジオンへ容易に変換可能な17α−ヒドロキシプレグナ−1,4,6−トリエン−3,20−ジオンを、短工程で収率よく得る方法を提供することにある。本発明の他の目的は、17α−ヒドロキシプレグナ−1,4,6−トリエン−3,20−ジオンを与える新規な合成中間体である7―置換―プレグナ−1,4−ジエン−3,20−ジオンを提供することにある。
【0005】
【課題を解決するための手段】
本発明によれば、上記の目的は、下記の一般式(I)
【0006】
【化8】
【0007】
(式中、Rは水素原子または水酸基の保護基を表す。)
で示される化合物[以下、化合物(I)と略記する。]を、銅触媒の存在下に分子状酸素により酸化して下記の一般式(II)
【0008】
【化9】
【0009】
(式中、Rは前記定義のとおりである。)
で示される7−置換−プレグナ−1,4−ジエン−3,20−ジオン[以下、7−置換−プレグナ−1,4−ジエン−3,20−ジオン(II)と略記する。]を得、該7−置換−プレグナ−1,4−ジエン−3,20−ジオン(II)を酸触媒の存在下に脱水反応に付すことにより下記の式(III)
【0010】
【化10】
【0011】
で示されるプレグナ−1,4,6−トリエン−3,20−ジオン(III)を得、該プレグナ−1,4,6−トリエン−3,20−ジオン(III)を塩基および還元剤の存在下に分子状酸素により酸化することを特徴とする下記の式(IV)
【0012】
【化11】
【0013】
で示される17α−ヒドロキシプレグナ−1,4,6−トリエン−3,20−ジオン(IV)の製造方法および7−置換−プレグナ−1,4−ジエン−3,20−ジオン(II)を提供することにより達成される。
【0014】
前記一般式(I)および7−置換−プレグナ−1,4−ジエン−3,20−ジオン(II)において、Rが示す水酸基の保護基としては、水酸基の保護の役割を果たす基であれば特に制限されないが、例えば、メチル基、第三級ブチル基、トリフェニルメチル基などの置換基を有していてもよいアルキル基;ベンジル基などのアラルキル基;アリル基などのアルケニル基;メトキシメチル基、1−エトキシエチル基、メトキシエトキシメチル基、テトラヒドロフラニル基、テトラヒドロピラニル基などの置換基を有していてもよいアルコキシメチル基;ベンジルオキシメチル基などのアラルキルオキシメチル基;トリメチルシリル基、トリエチルシリル基、イソプロピルジメチルシリル基、トリイソプロピルシリル基、第三級ブチルジメチルシリル基、第三級ブチルジフェニルシリル基、トリフェニルシリル基などの三置換シリル基などを挙げることができる。
【0015】
本発明の製造方法の各工程を詳細に説明する。化合物(I)から7−置換−プレグナ−1,4−ジエン−3,20−ジオン(II)を得る工程において、反応系に存在させる銅触媒としては、酢酸銅(II)、硫酸銅(II)などが使用される。銅触媒の使用量は化合物(I)に対して1モル%から7モル%の範囲が好ましく、3モル%から5モル%の範囲がより好ましい。この反応は、2,2'−ジピリジルおよび塩基の存在下に行うことが良好な結果を与える。2,2'−ジピリジルの使用量は、化合物(I)に対して1モル%から10モル%の範囲が好ましく、3モル%から5モル%の範囲がより好ましい。塩基としては、トリエチルアミン、ジイソプロピルエチルアミン、1,4−ジアザビシクロ[2.2.2]オクタン、1,8−ジアザビシクロ[5.4.0]ウンデカ−7−エンなどが用いられる。塩基の使用量は、化合物(I)に対して0.2当量から1.5当量の範囲が好ましく、0.4当量から0.7当量の範囲がより好ましい。反応は、反応液中に空気、好ましくは酸素を吹き込むことによって行われる。反応は、0℃から30℃の範囲の温度で行うのが好ましい。
【0016】
7−置換−プレグナ−1,4−ジエン−3,20−ジオン(II)からプレグナ−1,4,6−トリエン−3,20−ジオン(III)を得る工程において、反応系に存在させる酸触媒としては、硫酸、p−トルエンスルホン酸、リン酸などを使用することができる。酸触媒の使用量は、7−置換−プレグナ−1,4−ジエン−3,20−ジオン(II)に対して0.1当量から1当量の範囲が好ましく、0.3当量から0.5当量の範囲がより好ましい。かかる反応は、ベンゼンまたはトルエンを反応溶媒として用い、加熱環流下に行うのが良好な結果を与える。
【0017】
プレグナ−1,4,6−トリエン−3,20−ジオン(III)から17α−ヒドロキシプレグナ−1,4,6−トリエン−3,20−ジオン(IV)を得る工程において、反応系に存在させる塩基としては、例えば、水酸化ナトリウム、水酸化カリウムなどのアルカリ金属の水酸化物;ナトリウムメトキシド、ナトリウムt−ブトキシドなどのアルコキシドなどが用いられる。塩基の使用量はプレグナ−1,4,6−トリエン−3,20−ジオン(III)に対して1当量から5当量の範囲が好ましく、2当量から4当量の範囲がより好ましい。
【0018】
また、還元剤としては、ジメチルスルフィド、ジエチルスルフィドなどのジアルキルスルフィド;テトラヒドロチオフェン;亜リン酸トリメチル、亜リン酸トリエチルなどの亜リン酸トリアルキル;亜リン酸トリフェニル;またはトリフェニルホスフィンなどの過酸化物を還元する能力のある化合物が使用される。還元剤の使用量はプレグナ−1,4,6−トリエン−3,20−ジオン(III)に対して1当量から10当量の範囲が好ましく、2当量から5当量の範囲がより好ましい。
【0019】
かかる反応は、反応溶液中に空気、好ましくは酸素を吹き込むことにより行われる。反応は−15℃から−25℃の範囲の温度で行うのが好ましい。
【0020】
このようにして得られた17α−ヒドロキシプレグナ−1,4,6−トリエン−3,20−ジオン(IV)の反応混合物からの単離・精製は、通常の有機化合物の単離・精製において用いられるのと同様の方法で行われる。例えば、反応混合物を水、塩化アンモニウム水溶液または重曹水溶液に注ぎ、ジエチルエーテル、塩化メチレン、酢酸エチル等の有機溶媒で抽出し、該抽出液を水、食塩水で洗浄したのち、乾燥、濃縮して粗生成物を得、該粗生成物を必要に応じて再結晶、クロマトグラフィー等により精製することにより行われる。
【0021】
本発明により得られる17α−ヒドロキシプレグナ−1,4,6−トリエン−3,20−ジオン(IV)は、特開昭54−109959号公報に記載の方法により17α−アセトキシプレグナ−1,4,6−トリエン−3,20−ジオンに容易に変換することができる。さらに、17α−アセトキシプレグナ−1,4,6−トリエン−3,20−ジオンは、特開昭61−204198号公報に記載の方法により、酢酸ゲストロキサンに導くことができる。
【0022】
また、本発明の出発物質である化合物(I)は、国際特許出願公開第88/ 07545号明細書記載の方法に従って製造することができる。
【0023】
【実施例】
以下、実施例により本発明を更に詳しく説明する。なお、本発明はこれらの実施例によって制限されるものではない。
【0024】
実施例1
7α−ヒドロキシプレグナ−1,4−ジエン−3,20−ジオンの合成
室温下、7α−ヒドロキシプレグナ−20−ホルミル−1,4−ジエン−3−オン(10g、29.2mmol)のN,N-ジメチルホルムアミド(200ml)溶液に酢酸第一銅一水和物(170mg、0.85mmol)、2,2'−ジピリジル(140mg、0.90mmol)および1,8−ジアザビシクロ[ 5.4.0] ウンデカ−7−エン(2.0ml、14.6mmol)を加え、室温下、空気を吹き込みながら20時間撹拌した。反応溶液を減圧下に濃縮した後に、酢酸エチル(300ml)により希釈し、水(200ml)により洗浄した。得られた水層を酢酸エチル(100ml)により2度抽出し、有機層を先に得られた有機層に加えた。有機層は水(200ml)で2度洗浄し、次いで飽和食塩水(200ml)で洗浄し、無水硫酸ナトリウムにより乾燥した後に、減圧下に溶媒を溜去した。得られた残査を塩化メチレン(40ml)に溶解して得られた溶液に、ヘキサン(80ml)を加え、生成した沈澱を濾過することにより、下記の物性値を示す7α−ヒドロキシプレグナ−1,4−ジエン−3,20−ジオン7.95g(収率83%)を得た。
13C−NMR(67.5MHz、CDCl3 )
209.2 、185.6 、164.5 、155.4 、127.6 、127.2 、69.4、63.2、50.4、44.1、43.9、43.4、41.0、39.7、38.0、31.4、23.9、22.8、22.4、18.3、13.2
【0025】
実施例2
プレグナ−1,4,6−トリエン−3,20−ジオンの合成
窒素雰囲気下、7α−ヒドロキシプレグナ−1,4−ジエン−3,20−ジオン(6. 28g、19.1mmol)をトルエン(50ml)およびN,N-ジメチルホルムアミド(10ml)の混合溶媒に溶解して得られた溶液に、p−トルエンスルホン酸(1.1g、5.74mmol)を加え、還流下脱水装置を用いて20時間反応させた。反応溶液を、酢酸エチル(50ml)により希釈し、続いて、水(100ml)により洗浄した。得られた水層を酢酸エチル(100ml)で2度抽出し、有機層を先に得られた有機層に加えた。有機層は1規定水酸化ナトリウム水溶液(50ml)で3度洗浄し、飽和食塩水(50ml)で洗浄した後に、無水硫酸ナトリウムにより乾燥し、減圧下に溶媒を溜去することにより、下記の物性値を示すプレグナ−1,4,6−トリエン−3,20−ジオン5.4g(収率91%)を得た。
13C−NMR(67.5MHz、CDCl3 )
208.9 、186.3 、162.2 、152.7 、137.8 、128.3 、127.9 、124.0 、63.1、53.8、48.2、44.3、41.1、38.5、38.1、31.5、23.9、22.9、21.8、20.7
【0026】
実施例3
17α−ヒドロキシプレグナ−1,4,6−トリエン−3,20−ジオンの合成
窒素雰囲気下、粗プレグナ−1,4,6−トリエン−3,20−ジオン(5.6g、18.1mmol)のN,N-ジメチルホルムアミド(225ml)溶液に亜リン酸トリエチル(8.4ml)および水酸化ナトリウム(2.24g)のメタノール(11.2ml)溶液を−20℃で加え、酸素を吹き込みながら−20℃で6時間撹拌した。反応溶液に−20℃で窒素を30分間吹き込んだ後に、水(500ml)に注ぎ込み、塩化メチレン(150ml)で3度抽出した。得られた有機層を飽和チオ硫酸ナトリウム水溶液(200ml)で2回、1規定水酸化ナトリウム水溶液(200ml)で2回、水(200ml)で2回、次いで飽和食塩水(200ml)で1回洗浄した後に、無水硫酸ナトリウムにより乾燥し、減圧下に溶媒を溜去した。得られた残査を塩化メチレン(20ml)加熱下に溶解して得られた溶液に、ヘキサン(100ml)を加え、生成した沈澱を濾過することにより下記の物性値を示す17α−ヒドロキシプレグナ−1,4,6−トリエン−3,20−ジオン3. 85g(収率65%)を得た。
1H−NMR(270MHz、CDCl3 )
7.06(1H, d, J = 10.37Hz)、6.24-6.32(2H, m)、6.03(1H, bd, J = 11.59Hz)、6.01(1H, bs)、2.74(1H, m) 、2.28(3H, s) 、1.20(3H, s) 、0.90(3H, s) 、1.2-2.15(10H, m)
【0027】
【発明の効果】
抗男性ホルモン剤として有用な酢酸ゲストロキサンの合成中間体として有用な17α−ヒドロキシプレグナ−1,4,6−トリエン−3,20−ジオンを、短工程で収率よく製造することができる。[0001]
[Industrial application fields]
The present invention relates to a process for producing 17α-hydroxypregna-1,4,6-triene-3,20-dione and an intermediate thereof. 17α-Hydroxypregna-1,4,6-triene-3,20-dione produced by the present invention is useful as a synthetic intermediate for acetic guest oxane useful as an anti-androgenic agent.
[0002]
[Prior art]
It is known that guest oxaloxane acetate, a compound useful as a strong antiandrogen, is easily produced from 17α-acetoxypregna-1,4,6-triene-3,20-dione (specially (See Kaisho 61-204198). Conventionally, as a method for producing 17α-acetoxypregna-1,4,6-triene-3,20-dione, 17α-acetoxypregna- described in German Patent Application No. 1,119,226 is used. A method using 4-en-3-one as a raw material is known.
[0003]
[Problems to be solved by the invention]
Although the above document does not describe the yield of the product 17α-acetoxypregna-1,4,6-triene-3,20-dione, the Journal of American Chemical Society ), 72, 4534 (1950), the yield is low.
[0004]
Thus, one object of the present invention is to provide 17α-hydroxy that can be easily converted to 17α-acetoxypregna-1,4,6-triene-3,20-dione useful as an intermediate for the synthesis of acetic guest oxane. An object of the present invention is to provide a method for obtaining pregna-1,4,6-triene-3,20-dione with a short process and high yield. Another object of the present invention is to provide 7-substituted-pregna-1,4-diene-3, a novel synthetic intermediate that gives 17α-hydroxypregna-1,4,6-triene-3,20-dione . To provide 20-dione .
[0005]
[Means for Solving the Problems]
According to the present invention, the above object is achieved by the following general formula (I):
[0006]
[Chemical 8]
[0007]
(In the formula, R represents a hydrogen atom or a hydroxyl-protecting group.)
[Hereinafter abbreviated as compound (I). ] Is oxidized with molecular oxygen in the presence of a copper catalyst to give the following general formula (II)
[0008]
[Chemical 9]
[0009]
(Wherein R is as defined above.)
7-substituted-pregna-1,4-diene-3,20-dione [hereinafter abbreviated as 7-substituted-pregna-1,4-diene-3,20-dione (II)]. And subjecting the 7-substituted-pregna-1,4-diene-3,20-dione (II) to a dehydration reaction in the presence of an acid catalyst, the following formula (III)
[0010]
Embedded image
[0011]
Pregna-1,4,6-triene-3,20-dione (III) represented by formula (1) is obtained, and the pregna-1,4,6-triene-3,20-dione (III) is present in the presence of a base and a reducing agent. The following formula (IV), characterized by oxidation with molecular oxygen
[0012]
Embedded image
[0013]
And a process for producing 17α-hydroxypregna-1,4,6-triene-3,20-dione (IV) represented by formula ( 7 ) and 7-substituted-pregna-1,4-diene-3,20-dione (II). Achieved by providing.
[0014]
In the general formula (I) and 7-substituted-pregna-1,4-diene-3,20-dione (II), the hydroxyl protecting group represented by R is a group that plays a role in protecting the hydroxyl group. Although not particularly limited, for example, an alkyl group which may have a substituent such as a methyl group, a tertiary butyl group or a triphenylmethyl group; an aralkyl group such as a benzyl group; an alkenyl group such as an allyl group; An alkoxymethyl group optionally having a substituent such as a group, 1-ethoxyethyl group, methoxyethoxymethyl group, tetrahydrofuranyl group, tetrahydropyranyl group; aralkyloxymethyl group such as benzyloxymethyl group; trimethylsilyl group, Triethylsilyl group, isopropyldimethylsilyl group, triisopropylsilyl group, tertiary butyldimethyl Lil group, tert-butyldiphenylsilyl group, etc. trisubstituted silyl group such as triphenylsilyl group can be given.
[0015]
Each process of the manufacturing method of this invention is demonstrated in detail. In the step of obtaining 7-substituted-pregna-1,4-diene-3,20-dione (II) from compound (I), the copper catalyst present in the reaction system includes copper acetate (II), copper sulfate (II ) Etc. are used. The amount of copper catalyst used is preferably in the range of 1 mol% to 7 mol%, more preferably in the range of 3 mol% to 5 mol%, relative to compound (I). This reaction gives good results when carried out in the presence of 2,2′-dipyridyl and a base. The amount of 2,2′-dipyridyl to be used is preferably in the range of 1 mol% to 10 mol%, more preferably in the range of 3 mol% to 5 mol%, relative to compound (I). Examples of the base include triethylamine, diisopropylethylamine, 1,4-diazabicyclo [2.2.2] octane, 1,8-diazabicyclo [5.4.0] undec-7-ene. The amount of base used is preferably in the range of 0.2 equivalents to 1.5 equivalents, more preferably in the range of 0.4 equivalents to 0.7 equivalents, relative to compound (I). The reaction is performed by blowing air, preferably oxygen, into the reaction solution. The reaction is preferably carried out at a temperature in the range of 0 ° C to 30 ° C.
[0016]
Acid present in the reaction system in the step of obtaining pregna-1,4,6-triene-3,20-dione (III) from 7-substituted-pregna-1,4-diene-3,20-dione (II) As the catalyst, sulfuric acid, p-toluenesulfonic acid, phosphoric acid and the like can be used. The amount of the acid catalyst to be used is preferably in the range of 0.1 equivalent to 1 equivalent with respect to 7-substituted-pregna-1,4-diene-3,20-dione (II), and 0.3 equivalent to 0.5 equivalent. A range of equivalents is more preferred. Such a reaction gives good results when carried out under heated reflux using benzene or toluene as a reaction solvent.
[0017]
In the step of obtaining 17α-hydroxypregna-1,4,6-triene-3,20-dione (IV) from pregna-1,4,6-triene-3,20-dione (III), present in the reaction system Examples of the base to be used include alkali metal hydroxides such as sodium hydroxide and potassium hydroxide; alkoxides such as sodium methoxide and sodium t-butoxide. The amount of the base used is preferably in the range of 1 to 5 equivalents and more preferably in the range of 2 to 4 equivalents with respect to pregna-1,4,6-triene-3,20-dione (III).
[0018]
Examples of the reducing agent include dialkyl sulfides such as dimethyl sulfide and diethyl sulfide; tetrahydrothiophenes; trialkyl phosphites such as trimethyl phosphite and triethyl phosphite; triphenyl phosphites; A compound capable of reducing the oxide is used. The amount of the reducing agent used is preferably in the range of 1 equivalent to 10 equivalents and more preferably in the range of 2 equivalents to 5 equivalents with respect to pregna-1,4,6-triene-3,20-dione (III).
[0019]
Such a reaction is performed by blowing air, preferably oxygen, into the reaction solution. The reaction is preferably carried out at a temperature in the range of -15 ° C to -25 ° C.
[0020]
The isolation and purification of the 17α-hydroxypregna-1,4,6-triene-3,20-dione (IV) thus obtained from the reaction mixture is carried out by the usual isolation and purification of organic compounds. This is done in the same way as used. For example, the reaction mixture is poured into water, an aqueous ammonium chloride solution or an aqueous sodium bicarbonate solution, and extracted with an organic solvent such as diethyl ether, methylene chloride, ethyl acetate, and the extract is washed with water and brine, dried and concentrated. A crude product is obtained, and the crude product is purified by recrystallization, chromatography or the like, if necessary.
[0021]
17α-Hydroxypregna-1,4,6-triene-3,20-dione (IV) obtained by the present invention can be obtained by the method described in JP-A No. 54-109959, 17α-acetoxypregna-1, It can be easily converted to 4,6-triene-3,20-dione. Further, 17α-acetoxypregna-1,4,6-triene-3,20-dione can be led to acetic acid guestloxane by the method described in JP-A-61-204198.
[0022]
Compound (I) which is a starting material of the present invention can be produced according to the method described in International Patent Application Publication No. 88/07545.
[0023]
【Example】
Hereinafter, the present invention will be described in more detail with reference to examples. In addition, this invention is not restrict | limited by these Examples.
[0024]
Example 1
Synthesis of 7α-hydroxypregna-1,4-diene-3,20-dione N of 7α-hydroxypregna-20-formyl-1,4-dien-3-one (10 g, 29.2 mmol) at room temperature , N-dimethylformamide (200 ml) solution in cuprous acetate monohydrate (170 mg, 0.85 mmol), 2,2′-dipyridyl (140 mg, 0.90 mmol) and 1,8-diazabicyclo [5.4. 0] Undec-7-ene (2.0 ml, 14.6 mmol) was added, and the mixture was stirred at room temperature for 20 hours while blowing air. The reaction solution was concentrated under reduced pressure, diluted with ethyl acetate (300 ml), and washed with water (200 ml). The obtained aqueous layer was extracted twice with ethyl acetate (100 ml), and the organic layer was added to the previously obtained organic layer. The organic layer was washed twice with water (200 ml), then with saturated brine (200 ml), dried over anhydrous sodium sulfate, and the solvent was distilled off under reduced pressure. Hexane (80 ml) is added to a solution obtained by dissolving the obtained residue in methylene chloride (40 ml), and the resulting precipitate is filtered to obtain 7α-hydroxypregna-1 having the following physical properties. , 4-diene-3,20-dione 7.95 g (yield 83%) was obtained.
13 C-NMR (67.5 MHz, CDCl 3 )
209.2, 185.6, 164.5, 155.4, 127.6, 127.2, 69.4, 63.2, 50.4, 44.1, 43.9, 43.4, 41.0, 39.7, 38.0, 31.4, 23.9, 22.8, 22.4, 18.3, 13.2
[0025]
Example 2
Synthesis of Pregna-1,4,6-triene-3,20-dione Under a nitrogen atmosphere, 7α-hydroxypregna-1,4-diene-3,20-dione (6.28 g, 19.1 mmol) was dissolved in toluene (6.28 g, 19.1 mmol). 50 ml) and N, N-dimethylformamide (10 ml) dissolved in a mixed solvent, p-toluenesulfonic acid (1.1 g, 5.74 mmol) was added, and the mixture was added using a dehydrator under reflux. Reacted for hours. The reaction solution was diluted with ethyl acetate (50 ml) followed by washing with water (100 ml). The obtained aqueous layer was extracted twice with ethyl acetate (100 ml), and the organic layer was added to the previously obtained organic layer. The organic layer was washed 3 times with 1N aqueous sodium hydroxide solution (50 ml), washed with saturated brine (50 ml), dried over anhydrous sodium sulfate, and the solvent was distilled off under reduced pressure to obtain the following physical properties. 5.4 g (yield 91%) of pregna-1,4,6-triene-3,20-dione showing the value were obtained.
13 C-NMR (67.5 MHz, CDCl 3 )
208.9, 186.3, 162.2, 152.7, 137.8, 128.3, 127.9, 124.0, 63.1, 53.8, 48.2, 44.3, 41.1, 38.5, 38.1, 31.5, 23.9, 22.9, 21.8, 20.7
[0026]
Example 3
Synthesis of 17α-hydroxypregna-1,4,6-triene-3,20-dione Crude pregna-1,4,6-triene-3,20-dione (5.6 g, 18.1 mmol) under nitrogen atmosphere To a solution of N, N-dimethylformamide (225 ml) in a solution of triethyl phosphite (8.4 ml) and sodium hydroxide (2.24 g) in methanol (11.2 ml) at −20 ° C. and blowing oxygen- Stir at 20 ° C. for 6 hours. After nitrogen was blown into the reaction solution at −20 ° C. for 30 minutes, it was poured into water (500 ml) and extracted three times with methylene chloride (150 ml). The obtained organic layer was washed twice with a saturated aqueous sodium thiosulfate solution (200 ml), twice with a 1N aqueous sodium hydroxide solution (200 ml), twice with water (200 ml) and then once with a saturated saline solution (200 ml). After that, it was dried with anhydrous sodium sulfate, and the solvent was distilled off under reduced pressure. Hexane (100 ml) was added to a solution obtained by dissolving the obtained residue under heating with methylene chloride (20 ml), and the resulting precipitate was filtered to give a 17α-hydroxypregnaner having the following physical properties. 1.85 g (yield 65%) of 1,4,6-triene-3,20-dione was obtained.
1 H-NMR (270 MHz, CDCl 3 )
7.06 (1H, d, J = 10.37Hz), 6.24-6.32 (2H, m), 6.03 (1H, bd, J = 11.59Hz), 6.01 (1H, bs), 2.74 (1H, m), 2.28 (3H , s), 1.20 (3H, s), 0.90 (3H, s), 1.2-2.15 (10H, m)
[0027]
【The invention's effect】
17α-Hydroxypregna-1,4,6-triene-3,20-dione useful as an intermediate for synthesis of guest dextran acetate useful as an antiandrogenic agent can be produced in a short process with a high yield. .
Claims (3)
で示される化合物を銅触媒の存在下に分子状酸素により酸化する下記の一般式(II)The compound represented by the following general formula (II) is oxidized with molecular oxygen in the presence of a copper catalyst.
で示される7−置換−プレグナ−1,4−ジエン−3,20−ジオンの製造方法。The manufacturing method of 7-substituted-pregna-1,4-diene-3,20-dione shown by these.
で示される7―置換―プレグナ−1,4−ジエン−3,20−ジオン。The following general formula (II)
7-substituted-pregna-1,4-diene-3,20-dione represented by
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20854294A JP3665091B2 (en) | 1994-09-01 | 1994-09-01 | Process for producing 17α-hydroxypregna-1,4,6-triene-3,20-dione |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20854294A JP3665091B2 (en) | 1994-09-01 | 1994-09-01 | Process for producing 17α-hydroxypregna-1,4,6-triene-3,20-dione |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0873493A JPH0873493A (en) | 1996-03-19 |
| JP3665091B2 true JP3665091B2 (en) | 2005-06-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| JP20854294A Expired - Fee Related JP3665091B2 (en) | 1994-09-01 | 1994-09-01 | Process for producing 17α-hydroxypregna-1,4,6-triene-3,20-dione |
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| Country | Link |
|---|---|
| JP (1) | JP3665091B2 (en) |
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