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JP4449229B2 - 6- (1-Fluoroethyl) -5-iodo-4-alkylaminopyrimidine derivatives, their production and pesticides for agriculture and horticulture - Google Patents
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JP4449229B2 - 6- (1-Fluoroethyl) -5-iodo-4-alkylaminopyrimidine derivatives, their production and pesticides for agriculture and horticulture - Google Patents

6- (1-Fluoroethyl) -5-iodo-4-alkylaminopyrimidine derivatives, their production and pesticides for agriculture and horticulture Download PDF

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JP4449229B2
JP4449229B2 JP2001031160A JP2001031160A JP4449229B2 JP 4449229 B2 JP4449229 B2 JP 4449229B2 JP 2001031160 A JP2001031160 A JP 2001031160A JP 2001031160 A JP2001031160 A JP 2001031160A JP 4449229 B2 JP4449229 B2 JP 4449229B2
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Prior art keywords
fluoroethyl
compound
iodo
formula
alkylaminopyrimidine
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JP2002234876A (en
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勝利 藤井
泰 中本
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Ube Corp
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Ube Industries Ltd
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Description

【0001】
【発明の属する技術分野】
本発明は、農園芸用の有害生物防除剤として有用である新規な6−(1−フルオロエチル)−5−ヨード−4−アルキルアミノピリミジン誘導体に関するものである。
【0002】
【従来の技術】
本発明の6−(1−フルオロエチル)−5−ヨード−4−アルキルアミノピリミジン誘導体は新規化合物であり、農園芸用の有害生物防除活性を有することも知られていない。
【0003】
【発明が解決しようとする課題】
本発明の課題は、新規な6−(1−フルオロエチル)−5−ヨード−4−アルキルアミノピリミジン誘導体、その製法及びそれを有効成分とする農園芸用の有害生物防除剤を提供することである。
【0004】
【課題を解決するための手段】
本発明者らは、前記の課題を解決するために検討した結果、新規な6−(1−フルオロエチル)−5−ヨード−4−アルキルアミノピリミジン誘導体が顕著な農園芸用の殺虫,殺ダニ,殺線虫及び殺菌活性を有することを見出し、本発明を完成した。
即ち、本発明は次の通りである。
第1の発明は、次式(1):
【0005】
【化4】

Figure 0004449229
【0006】
(式中、Rは、炭素原子数1〜20個の直鎖状又は分岐状アルキル基を表わし;*は、不斉炭素原子を表わす。)
で示される6−(1−フルオロエチル)−5−ヨード−4−アルキルアミノピリミジン誘導体に関するものである。
第2の発明は
次式(2):
【0007】
【化5】
Figure 0004449229
【0008】
(式中、*は、前記と同義である。)
で示される4−クロロ−6−(1−フルオロエチル)−5−ヨードピリミジンと
次式(3):
【0009】
【化6】
Figure 0004449229
【0010】
(式中、Rは、前記と同義である。)
で示されるアルキルアミン類とを反応させることを特徴とする前記の式(1)で示される6−(1−フルオロエチル)−5−ヨード−4−アルキルアミノピリミジン誘導体の製法に関するものである。
第3の発明は、前記の式(1)で示される6−(1−フルオロエチル)−5−ヨード−4−アルキルアミノピリミジン誘導体を有効成分とする農園芸用の有害生物防除剤に関するものである。
【0011】
【発明の実施の形態】
以下、本発明について詳細に説明する。
前記の各化合物で表した各種の置換基は、次の通りである。
Rは炭素原子数1〜20個の直鎖状又は分岐状アルキル基である。
*は、不斉炭素原子である。
【0012】
Rにおける炭素原子数1〜20個のアルキル基としては、直鎖状又は分岐状のアルキル基を挙げることができるが;i−プロピル基,sec−ブチル基,n−アミル基,n−オクチル基,2−エチルヘキシル基,n−ノニル基,n−デシル基,1−エチルノニル基,n−テトラデシル基が好ましい。
【0013】
本発明の化合物(1)はアミノ基を有しているので、これに由来する酸付加塩も本発明に含まれる。
酸付加塩を形成する酸としては、例えば、塩酸,臭化水素酸,硝酸,硫酸,リン酸などの無機酸;ギ酸,シュウ酸,フマル酸,アジピン酸,ステアリン酸,オレイン酸,アコニット酸などのカルボン酸;メタンスルホン酸,ベンゼンスルホン酸、p−トルエンスルホン酸などのスルホン酸;サッカリンなどを挙げることができる。
【0014】
また、本発明の化合物(1)は*で示した不斉炭素原子原子を含むので、これらに由来する個々の光学異性体、ラセミ体,ジアステレオマー体又はそれらの混合物のいずれも本発明に含まれる。
前記の本発明の化合物(1)の合成法を、さらに詳細に述べる。
〔合成法〕
合成法は、化合物(2)と化合物(3)とを、溶媒中、塩基存在下で反応させて化合物(1)を得る方法である。
【0015】
溶媒の種類としては、本反応に直接関与しないものであれば特に限定されず、例えば、ベンゼン,トルエン,キシレン,メチルナフタリン,石油エーテル,リグロイン,ヘキサン,クロルベンゼン,ジクロルベンゼン,クロロホルム,ジクロルエタン,トリクロルエチレンのような塩素化された又はされていない芳香族、脂肪族、脂環式の炭化水素類;テトラヒドロフラン,シオキサン,ジエチルエーテルなどのようなエーテル類;アセトニトリル,プロピオニトリルなどのようなニトリル類;アセトン,メチルエチルケトンなどのようなケトン類;N,N−ジメチルホルムアミド,ジメチルスルフォキシド,スルフォラン,N,N−ジメチルイミダゾリジノン,N−メチルピロリドンなどのような非プロトン性極性溶媒;及び前記溶媒の混合物などを挙げることができる。
【0016】
溶媒の使用量は、化合物(2)が5〜80重量%になるようにして使用することができるが;10〜70重量%が好ましい。
塩基の種類としては、特に限定されず、有機及び無機塩基、例えばトリエチルアミンのような第3級アミン、DBUなどの有機塩基、アルカリ金属及びアルカリ土類金属の水素化物、水酸化物、炭酸塩、炭酸水素塩などの無機塩基を挙げることができるが;トリエチルアミンのような有機塩基が好ましい。
塩基の使用量は、化合物(2)に対して1〜5倍モルであるが;1.2〜2.0倍モルが好ましい。
【0017】
反応温度は、特に限定されないが、室温から使用する溶媒の沸点以下の温度範囲内であり;60〜110℃が好ましい。
反応時間は、前記の濃度,温度によって変化するが;通常0.5〜8時間である。
原料化合物の使用量は、化合物(2)に対して化合物(3)が、1.0〜5倍モルであるが;1〜1.1倍モルが好ましい。
本発明で用いる化合物(2)は、特願2000−384776号公報の記載に準じて次式に示す方法で製造することができる。
【0018】
【化7】
Figure 0004449229
【0019】
(式中、*は、前記と同義である。)
化合物(4)は、例えば、特開平−171834号公報に記載の方法に準じて、次式に示す方法で製造できる。
【0020】
【化8】
Figure 0004449229
【0021】
化合物(3)は、市販品を使用するか、又は次式に示す方法によって製造することができる。
【0022】
【化9】
Figure 0004449229
【0023】
(式中、Rは、前記と同義であり、Xはクロル原子又はブロモ原子を表す。)
以上のようにして製造された目的の化合物(1)は、反応終了後、抽出,濃縮,ロ過などの通常の後処理を行い、必要に応じて再結晶,各種クロマトグラフィーなどの公知の手段で適宣精製することができる。
【0024】
〔防除効果〕
本発明の化合物(1)で防除効果が認められる農園芸用有害生物としては、農園芸害虫〔例えば、半翅目(ウンカ類,ヨコバイ類,アブラムシ類,コナジラミ類など)、鱗翅目(ヨトウムシ類,コナガ,ハマキムシ類,メイガ類,シンクイムシ類,モンシロチョウなど)、鞘翅目(ゴミムシダマシ類,ゾウムシ類,ハムシ類,コガネムシ類など)、ダニ目(ハダニ科のミカンハダニ,ナミハダニなど、フシダニ科のミカンサビダニなど)〕、線虫(ネコブセンチュウ,シストセンチュウ,ネグサレセンチュウ,シンガレセンチュウ,マツノザイセンチュウなど)、ネダニ、衛生害虫(例えば、ハエ,カ,ゴキブリなど)、貯蔵害虫(例えば、コクヌストモドキ類,マメゾウムシ類など)、木材害虫(例えば、イエシロアリ,ヤマトシロアリ,ダイコクシロアリなどのシロアリ類、ヒラタキクイムシ類、シバンムシ類、シンクイムシ類、カミキリムシ類、キクイムシ類など)を挙げることができ、また、農園芸病原菌(例えば、コムギ赤さび病,大麦うどんこ病,キュウリべと病,イネいもち病,トマト疫病など)を挙げることができる。
【0025】
〔有害生物防除剤〕
本発明の農園芸用の有害生物防除剤は、特に、殺虫・殺ダニ及び殺線虫効果が顕著であり、化合物(1)の1種以上を有効成分として含有するものである。
化合物(1)は、単独で使用することもできるが、通常は常法によって、担体,界面活性剤,分散剤,補助剤などを配合(例えば、粉剤,乳剤,微粒剤,粒剤,水和剤,油性の懸濁液,エアゾールなどの組成物として調製する)して使用することが好ましい。
【0026】
担体としては、例えば、タルク,ベントナイト,クレー,カオリン,ケイソウ土,ホワイトカーボン,バーミキュライト,消石灰,ケイ砂,硫安,尿素などの固体担体;炭化水素(ケロシン,鉱油など)、芳香族炭化水素(ベンゼン,トルエン,キシレンなど)、塩素化炭化水素(クロロホルム,四塩化炭素など)、エーテル類(ジオキサン,テトラヒドロフランなど)、ケトン類(アセトン,シクロヘキサノン,イソホロンなど)、エステル類(酢酸エチル,エチレングリコールアセテート,マレイン酸ジブチルなど)、アルコール類(メタノール,n−ヘキサノール,エチレングリコールなど)、極性溶媒(ジメチルホルムアミド,ジメチルスルホキシドなど)、水などの液体担体;空気,窒素,炭酸ガス,フレオンなどの気体担体(この場合には、混合噴射することができる)などを挙げることがでる。
【0027】
本剤の動植物への付着,吸収の向上,薬剤の分散,乳化,展着などの性能を向上させるために使用できる界面活性剤や分散剤としては、例えば、アルコール硫酸エステル類,アルキルスルホン酸塩,リグニンスルホン酸塩,ポリオキシエチレングリコールエーテルなどを挙げることができる。そして、その製剤の性状を 改善するためには、例えば、カルボキシメチルセルロース,ポリエチレングリコール,アラビアゴムなどを補助剤として用いることができる。
本剤の製造では、前記の担体,界面活性剤,分散剤及び補助剤をそれぞれの目的に応じて、各々単独で又は適当に組み合わせて使用することができる。
【0028】
本発明の化合物(1)を製剤化した場合の有効成分濃度は、乳剤では通常1〜50重量%,粉剤では通常0.3〜25重量%,水和剤では通常1〜90重量%,粒剤では通常0.5〜5重量%,油剤では通常0.5〜5重量%,エアゾールでは通常0.1〜5重量%である。
これらの製剤を適当な濃度に希釈して、それぞれの目的に応じて、植物茎葉,土壌,水田の水面に散布するか、又は直接施用することによって各種の用途に供することができる。
【0029】
【実施例】
以下、本発明を参考例及び実施例によって具体的に説明する。なお、これらは、本発明の範囲を限定するものではない。
参考例1〔化合物(5)の合成法〕
6−(1−フルオロエチル)−4−ピリミドンの合成
4−フルオロ−3−オキソペンタン酸メチルエステル(93.3g)をメタノール(1000ml)に溶解し、28%ナトリウムメチラート/メタノール溶液(365g)とホルムアミジン酢酸塩(98.4g)を順次加え、40℃で12時間加熱還流した。
反応終了後、10℃以下に冷却し、濃硫酸(95.1g)と水(85g)の混合液を添加した。次いで、50℃で30分撹拌し、不溶物を濾別し、濾液を減圧下に濃縮した。得られた残渣をイソプロパノールで再結晶することによって、無色結晶である目的化合物を58g得た。
m.p.170.0〜171.5℃
【0030】
参考例2〔化合物(6)の合成法〕
6−(1−フルオロエチル)−5−ヨード−4−ピリミドンの合成
ヨード(50.8g)を酢酸(500ml)に加え、室温撹拌下に塩素(15g)を吹き込み調製した1塩化ヨウ素の酢酸溶液を、6−(1−フルオロエチル)−4−ピリミドン(56.8g)の酢酸(150ml)溶液に室温撹拌下に滴下し、6時間撹拌した。
反応終了後、減圧下に酢酸を留去し、水(300ml)を加え溶解し、2N水酸化ナトリウム及び飽和炭酸水素ナトリウム水溶液でpH5に調整する。析出した結晶を濾集し、水洗、乾燥し、淡黄土色結晶の目的物85gを得た。
更に、酢酸エチル−ヘキサンによる再結晶で精製することによって、無色小針状結晶である目的化合物を76.0g得た。
m.p.195〜196℃
【0031】
参考例3〔化合物(2)の合成法〕
4−クロロ−6−(1−フルオロエチル)−5−ヨードピリミジンの合成
6−(1−フルオロエチル)−5−ヨード−4−ピリミドン(53.6g)を酢酸エチル(180ml)に加え、N,N−ジメチルフォルムアミド(1.5g)を添加し、70℃に加温撹拌する。次いで、チオニルクロライド(28.6g)を滴下し、3時間撹拌して反応を完結した。
反応混合物冷却後、氷冷水に加え、2N水酸化ナトリウムでpH4に調整し、酢酸エチル層を分取し、水洗、無水硫酸ナトリウムで乾燥した。次いで、減圧下溶媒を留去し、得られた残渣を減圧蒸留で精製することによって、淡黄色液体である目的物を54.6g得た。
b.p.116〜118℃/4mmHg
【0032】
実施例1〔化合物(1)の合成法〕
(1)6−(1−フルオロエチル)−5−ヨード−4−(i−プロピルアミノ)ピリミジン(化合物4)の合成
i−プロピルアミン(0.4g)とトリエチルアミン(0.6g)をトルエン20mlに溶解し、4−クロロ−6−(1−フルオロエチル)−5−ヨードピリミジン(1.5g)を加え、約80℃で3時間加熱撹拌した。
反応終了後、トリエチルアミン塩酸塩を濾別し、減圧下溶媒を留去し、得られた残渣をシリカゲルカラムクロマトグラフィー(ワコーゲルC−200,n−ヘキサン:酢酸エチル=3:1溶出)で精製することによって、無色粉状結晶である目的物を1.4g得た。
【0033】
m.p.88〜90℃
1H−NMR(CDCl3,δppm)
1.26〜1.28(6H,d)、1.59〜1.71(3H,d−d)、
4.25〜4.36(1H,m)、5.39(1H,b)、
5.68〜5.90(1H,d−q)、8.52(1H,s)、
【0034】
(2)6−(1−フルオロエチル)−5−ヨード−4−(n−テトラデシルアミノ)ピリミジン(化合物16)の合成
n−テトラデシルアミン(1.1g)とトリエチルアミン(0.6g)をトルエン20mlに溶解し、4−クロロ−6−(1−フルオロエチル)−5−ヨードピリミジン(1.5g)を加え、約80℃で3時間加熱撹拌した。
反応終了後、トリエチルアミン塩酸塩を濾別し、減圧下溶媒を留去し、得られた残渣をシリカゲルカラムクロマトグラフィー(ワコーゲルC−200,n−ヘキサン:酢酸エチル=3:1溶出)で精製することによって、淡橙色粉状結晶である目的物を2.1g得た。
【0035】
m.p.35〜36℃
1H−NMR(CDCl3,δppm)
0.86〜0.90(3H,t)、1.26(20H,s)、
1.59〜1.70(4H,m)、3.46〜3.52(4H,m)、
5.59(1H,b)、5.68〜5.90(1H,d−q)、
8.45(1H,s)
【0036】
(3)表1中のその他の化合物(1)の合成
前記(1)及び(2)に記載の方法に準じて、表1中のその他の化合物(1)を合成した。
以上のように合成した化合物(1)及びそれらの物性を表1に示す。
【0037】
【表1】
Figure 0004449229
【0038】
実施例2〔製剤の調製〕
(1)粒剤の調製
化合物(1)を5重量部、ベントナイト35重量部,タルク57重量部,ネオレックスパウダー(商品名;花王株式会社製)1重量部及びリグニンスルホン酸ソーダ2重量部を均一に混合し、次いで少量の水を添加して混練した後、造粒,乾燥して粒剤を得た。
【0039】
(2)水和剤の調製
化合物(1)を10重量部,カオリン70重量部,ホワイトカーボン18重量部,ネオレックスパウダー(商品名;花王株式会社製)1.5重量部及びデモール(商品名;花王株式会社製)0.5重量部を均一に混合し、次いで粉砕して水和剤を得た。
【0040】
(3)乳剤の調製
化合物(1)を20重量部及びキシレン70重量部に、トキサノン(商品名;三洋化成工業製)10重量部を加えて均一に混合し、溶解して乳剤を得た。
【0041】
(4)粉剤の調製
化合物(1)を粉5重量部,タルク50重量部及びカオリン45重量部を均一に混合して粉剤を得た。
【0042】
実施例3〔効力試験〕
(1)アオムシに対する効力試験
実施例2に準じて調製した表1に示す化合物(1)の各水和剤を界面活性剤(0.01%)を含む水で1000ppmに希釈し、これら各薬液中にキャベツ葉片(5cm×5cm)を30秒浸漬し、各プラスチックカップに一枚ずつ入れて風乾した。
次に、これらカップ内に各々10頭のアオムシ(3齢幼虫)を放って蓋をし、25℃の定温室に放置し、2日後に各カップの生死虫数を数えて死虫率を求めた。
この結果、化合物9,11,12,15,16が、80%以上の殺虫活性を示した。
【0043】
(2)モモアカアブラムシに対する効力試験
実施例2に準じて調製した表1に示す化合物(1)の各水和剤を界面活性剤(0.01%)を含む水で100ppmに希釈し、これら各薬液中にキャベツ葉片(5cm×5cm)を30秒浸漬し、各プラスチックカップに一枚ずつ入れて風乾した。
次に、これらカップ内に各々10頭のモモアカアブラムシ(無翅雌成虫)を放って蓋をし、25℃の定温室に放置し、3日後に各カップの無翅雌成虫及び幼虫の生死数を数えて死虫率を求めた。
この結果、化合物6,9,11,12,15,16が、80%以上の殺虫活性を示した。
【0044】
(3)抗菌試験
表1に示す化合物(1)のアセトン溶液を、最終濃度40ppmとなるようにPDA(ポテトデキストロース寒天)培地に混入させ平板培地を作製した。
予めPDA平板培地に生育させたスモモ灰星病菌、イネいもち病菌の菌叢をメスで1mm四方に切り取り、作製した薬剤入り平板培地へ接種した。
25℃、暗黒下で3日間培養し、薬剤無添加区と菌叢直径を比較し、以下の式で菌叢生育阻止率(%)を求めた。
【0045】
【数1】
Figure 0004449229
【0046】
効果の判定は、菌叢阻止率が95〜100%を5,85〜95%を4,85〜70%を3,45〜70%を2,10〜45を1,10〜0%を0として、5〜0の6段階で行った。
この結果、スモモ灰星病菌に対して化合物4〜6,9〜12,15,16が4以上の効果を示し、イネいもち病菌対して化合物4,6,9,11,12,15,16が3以上の効果を示した。
【0047】
【発明の効果】
本発明の新規な6−(1−フルオロエチル)−5−ヨード−4−アルキルアミノピリミジン誘導体は、優れた農園芸用の有害生物防除効果を有するものである。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a novel 6- (1-fluoroethyl) -5-iodo-4-alkylaminopyrimidine derivative useful as a pest control agent for agriculture and horticulture.
[0002]
[Prior art]
The 6- (1-fluoroethyl) -5-iodo-4-alkylaminopyrimidine derivatives of the present invention are novel compounds and are not known to have pest control activity for agriculture and horticulture.
[0003]
[Problems to be solved by the invention]
An object of the present invention is to provide a novel 6- (1-fluoroethyl) -5-iodo-4-alkylaminopyrimidine derivative, a production method thereof, and an agricultural and horticultural pest control agent comprising the same as an active ingredient. is there.
[0004]
[Means for Solving the Problems]
As a result of studies to solve the above problems, the present inventors have found that novel 6- (1-fluoroethyl) -5-iodo-4-alkylaminopyrimidine derivatives are remarkable for agricultural and horticultural insecticides and acaricides. The present invention was completed by finding nematicidal and bactericidal activities.
That is, the present invention is as follows.
The first invention is the following formula (1):
[0005]
[Formula 4]
Figure 0004449229
[0006]
(In the formula, R represents a linear or branched alkyl group having 1 to 20 carbon atoms; * represents an asymmetric carbon atom.)
6- (1-fluoroethyl) -5-iodo-4-alkylaminopyrimidine derivatives represented by formula (1).
The second invention is the following formula (2):
[0007]
[Chemical formula 5]
Figure 0004449229
[0008]
(In the formula, * is as defined above.)
4-chloro-6- (1-fluoroethyl) -5-iodopyrimidine represented by the following formula (3):
[0009]
[Chemical 6]
Figure 0004449229
[0010]
(In the formula, R is as defined above.)
And a process for producing a 6- (1-fluoroethyl) -5-iodo-4-alkylaminopyrimidine derivative represented by the above formula (1).
The third invention relates to an agricultural and horticultural pest control agent comprising a 6- (1-fluoroethyl) -5-iodo-4-alkylaminopyrimidine derivative represented by the above formula (1) as an active ingredient. is there.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in detail.
The various substituents represented by the respective compounds are as follows.
R is a linear or branched alkyl group having 1 to 20 carbon atoms.
* Is an asymmetric carbon atom.
[0012]
Examples of the alkyl group having 1 to 20 carbon atoms in R include a linear or branched alkyl group; i-propyl group, sec-butyl group, n-amyl group, and n-octyl group. , 2-ethylhexyl group, n-nonyl group, n-decyl group, 1-ethylnonyl group and n-tetradecyl group are preferable.
[0013]
Since the compound (1) of the present invention has an amino group, an acid addition salt derived therefrom is also included in the present invention.
Examples of acids that form acid addition salts include inorganic acids such as hydrochloric acid, hydrobromic acid, nitric acid, sulfuric acid, and phosphoric acid; formic acid, oxalic acid, fumaric acid, adipic acid, stearic acid, oleic acid, and aconitic acid. Carboxylic acid of; sulfonic acid such as methanesulfonic acid, benzenesulfonic acid, p-toluenesulfonic acid; saccharin and the like.
[0014]
In addition, since the compound (1) of the present invention contains an asymmetric carbon atom indicated by *, any of the individual optical isomers, racemates, diastereomers or mixtures thereof derived from these compounds is included in the present invention. included.
The method for synthesizing the compound (1) of the present invention will be described in more detail.
(Synthesis method)
The synthesis method is a method of obtaining compound (1) by reacting compound (2) and compound (3) in a solvent in the presence of a base.
[0015]
The type of solvent is not particularly limited as long as it does not directly participate in this reaction. For example, benzene, toluene, xylene, methylnaphthalene, petroleum ether, ligroin, hexane, chlorobenzene, dichlorobenzene, chloroform, dichloroethane, Aromatic, aliphatic, and alicyclic hydrocarbons such as trichlorethylene; ethers such as tetrahydrofuran, thioxane, diethyl ether, etc .; nitriles such as acetonitrile, propionitrile, etc. Ketones such as acetone, methyl ethyl ketone, etc .; aprotic polar solvents such as N, N-dimethylformamide, dimethyl sulfoxide, sulfolane, N, N-dimethylimidazolidinone, N-methylpyrrolidone, and the like; Mixing of the solvents Or the like can be mentioned things.
[0016]
The amount of the solvent used can be such that the compound (2) is 5 to 80% by weight; however, it is preferably 10 to 70% by weight.
The type of base is not particularly limited, and organic and inorganic bases, for example, tertiary amines such as triethylamine, organic bases such as DBU, alkali metal and alkaline earth metal hydrides, hydroxides, carbonates, Mention may be made of inorganic bases such as bicarbonates; organic bases such as triethylamine are preferred.
Although the usage-amount of a base is 1-5 times mole with respect to a compound (2); 1.2-2.0 times mole is preferable.
[0017]
Although reaction temperature is not specifically limited, It exists in the temperature range below the boiling point of the solvent to be used from room temperature; 60-110 degreeC is preferable.
The reaction time varies depending on the concentration and temperature; however, it is usually 0.5 to 8 hours.
The amount of the raw material compound used is 1.0 to 5 times mol of compound (3) with respect to compound (2); preferably 1 to 1.1 times mol.
The compound (2) used in the present invention can be produced by a method represented by the following formula according to the description in Japanese Patent Application No. 2000-384776.
[0018]
[Chemical 7]
Figure 0004449229
[0019]
(In the formula, * is as defined above.)
Compound (4) can be produced, for example, by the method shown in the following formula according to the method described in JP-A-171834.
[0020]
[Chemical 8]
Figure 0004449229
[0021]
Compound (3) may be a commercially available product, or can be produced by the method shown in the following formula.
[0022]
[Chemical 9]
Figure 0004449229
[0023]
(In the formula, R is as defined above, and X represents a chloro atom or a bromo atom.)
The target compound (1) produced as described above is subjected to conventional post-treatments such as extraction, concentration and filtration after completion of the reaction, and known means such as recrystallization and various chromatography as necessary. Can be refined properly.
[0024]
[Control effect]
Examples of agricultural and horticultural pests that are effective in controlling the compound (1) of the present invention include agricultural and horticultural pests [for example, Hemiptera (Lepidoptera, Leafhopper, Aphid, Whitefly, etc.), Lepidoptera (Coleoptera) , Moths, caterpillars, moths, beetles, cabbage butterflies, etc., Coleoptera, weevil, potato beetles, scarabs, etc. )], Nematodes (such as root-knot nematodes, cyst nematodes, negrassenchu, singale nematodes, pine wood nematodes, etc.), mites, sanitary pests (eg, flies, mosquitoes, cockroaches, etc.) Wood pests (eg, termites, Yamato termites, Examples include termites such as crocodile, flattering beetles, beetles, beetles, beetles, bark beetles, etc., and agro-horticultural fungi (for example, wheat rust, barley powdery mildew, cucumber downy mildew) , Rice blast, tomato plague, etc.).
[0025]
[Pesticides]
The agricultural and horticultural pest control agent of the present invention is particularly effective in insecticidal / miticidal and nematicidal effects, and contains at least one compound (1) as an active ingredient.
The compound (1) can be used alone, but usually contains a carrier, a surfactant, a dispersing agent, an auxiliary agent, etc. by a conventional method (for example, powder, emulsion, fine granule, granule, hydration) (Prepared as a composition such as an agent, oily suspension, aerosol).
[0026]
Examples of the carrier include solid carriers such as talc, bentonite, clay, kaolin, diatomaceous earth, white carbon, vermiculite, slaked lime, silica sand, ammonium sulfate, and urea; hydrocarbons (kerosene, mineral oil, etc.), aromatic hydrocarbons (benzene) , Toluene, xylene, etc.), chlorinated hydrocarbons (chloroform, carbon tetrachloride, etc.), ethers (dioxane, tetrahydrofuran, etc.), ketones (acetone, cyclohexanone, isophorone, etc.), esters (ethyl acetate, ethylene glycol acetate, Liquid carriers such as dibutyl maleate), alcohols (methanol, n-hexanol, ethylene glycol, etc.), polar solvents (dimethylformamide, dimethyl sulfoxide, etc.), water; gas carriers (air, nitrogen, carbon dioxide, freon, etc.) This Case, it is possible to mix injection) out and the like.
[0027]
Examples of surfactants and dispersants that can be used to improve the performance of adhesion and absorption of this agent to animals and plants, dispersion, emulsification, and spreading of drugs include alcohol sulfates and alkyl sulfonates. , Lignin sulfonate, polyoxyethylene glycol ether, and the like. In order to improve the properties of the preparation, for example, carboxymethylcellulose, polyethylene glycol, gum arabic and the like can be used as an auxiliary agent.
In the production of this agent, the above-mentioned carrier, surfactant, dispersant and adjuvant can be used alone or in appropriate combination depending on the purpose.
[0028]
The active ingredient concentration when the compound (1) of the present invention is formulated is usually 1 to 50% by weight for emulsions, usually 0.3 to 25% by weight for powders, and usually 1 to 90% by weight for wettable powders. It is usually 0.5 to 5% by weight for agents, 0.5 to 5% by weight for oils, and 0.1 to 5% by weight for aerosols.
These preparations can be used for various purposes by diluting them to an appropriate concentration and spraying them on the surface of plant foliage, soil, paddy fields, or applying them directly according to their purpose.
[0029]
【Example】
Hereinafter, the present invention will be specifically described with reference examples and examples. These do not limit the scope of the present invention.
Reference Example 1 [Synthesis Method of Compound (5)]
Synthesis of 6- (1-fluoroethyl) -4-pyrimidone 4-fluoro-3-oxopentanoic acid methyl ester (93.3 g) was dissolved in methanol (1000 ml), and 28% sodium methylate / methanol solution (365 g) And formamidine acetate (98.4 g) were sequentially added, and the mixture was heated to reflux at 40 ° C. for 12 hours.
After completion of the reaction, the mixture was cooled to 10 ° C. or lower, and a mixed solution of concentrated sulfuric acid (95.1 g) and water (85 g) was added. Subsequently, the mixture was stirred at 50 ° C. for 30 minutes, insoluble matters were filtered off, and the filtrate was concentrated under reduced pressure. The obtained residue was recrystallized from isopropanol to obtain 58 g of the objective compound as colorless crystals.
m. p. 170.0-171.5 ° C
[0030]
Reference Example 2 [Synthesis Method of Compound (6)]
Synthesis of 6- (1-fluoroethyl) -5-iodo-4-pyrimidone Iodine chloride (50.8 g) was added to acetic acid (500 ml) and chlorine (15 g) was blown into the mixture with stirring at room temperature. Was added dropwise to a solution of 6- (1-fluoroethyl) -4-pyrimidone (56.8 g) in acetic acid (150 ml) with stirring at room temperature, and stirred for 6 hours.
After completion of the reaction, acetic acid is distilled off under reduced pressure, water (300 ml) is added and dissolved, and the pH is adjusted to 5 with 2N sodium hydroxide and saturated aqueous sodium hydrogen carbonate solution. The precipitated crystals were collected by filtration, washed with water and dried to obtain 85 g of the desired product as pale ocher crystals.
Further, purification by recrystallization with ethyl acetate-hexane gave 76.0 g of the target compound as colorless small needle crystals.
m. p. 195-196 ° C
[0031]
Reference Example 3 [Synthesis Method of Compound (2)]
Synthesis of 4-chloro-6- (1-fluoroethyl) -5-iodopyrimidine 6- (1-fluoroethyl) -5-iodo-4-pyrimidone (53.6 g) was added to ethyl acetate (180 ml) and N , N-dimethylformamide (1.5 g) is added, and the mixture is heated to 70 ° C. with stirring. Subsequently, thionyl chloride (28.6 g) was added dropwise and stirred for 3 hours to complete the reaction.
After cooling the reaction mixture, it was added to ice-cold water, adjusted to pH 4 with 2N sodium hydroxide, the ethyl acetate layer was separated, washed with water, and dried over anhydrous sodium sulfate. Subsequently, the solvent was distilled off under reduced pressure, and the obtained residue was purified by distillation under reduced pressure to obtain 54.6 g of the desired product as a pale yellow liquid.
b. p. 116-118 ° C / 4mmHg
[0032]
Example 1 [Synthesis Method of Compound (1)]
(1) Synthesis of 6- (1-fluoroethyl) -5-iodo-4- (i-propylamino) pyrimidine (Compound 4) i-propylamine (0.4 g) and triethylamine (0.6 g) in 20 ml of toluene 4-chloro-6- (1-fluoroethyl) -5-iodopyrimidine (1.5 g) was added, and the mixture was stirred with heating at about 80 ° C. for 3 hr.
After completion of the reaction, triethylamine hydrochloride is filtered off, the solvent is distilled off under reduced pressure, and the resulting residue is purified by silica gel column chromatography (Wakogel C-200, n-hexane: ethyl acetate = 3: 1 elution). As a result, 1.4 g of the desired product as colorless powdery crystals was obtained.
[0033]
m. p. 88-90 ° C
1 H-NMR (CDCl 3 , δ ppm)
1.26 to 1.28 (6H, d), 1.59 to 1.71 (3H, dd),
4.25 to 4.36 (1H, m), 5.39 (1H, b),
5.68-5.90 (1H, dq), 8.52 (1H, s),
[0034]
(2) Synthesis of 6- (1-fluoroethyl) -5-iodo-4- (n-tetradecylamino) pyrimidine (Compound 16) n-tetradecylamine (1.1 g) and triethylamine (0.6 g) It melt | dissolved in 20 ml of toluene, 4-chloro-6- (1-fluoroethyl) -5-iodopyrimidine (1.5 g) was added, and it heated and stirred at about 80 degreeC for 3 hours.
After completion of the reaction, triethylamine hydrochloride is filtered off, the solvent is distilled off under reduced pressure, and the resulting residue is purified by silica gel column chromatography (Wakogel C-200, n-hexane: ethyl acetate = 3: 1 elution). As a result, 2.1 g of the target product which was a pale orange powder crystal was obtained.
[0035]
m. p. 35-36 ° C
1 H-NMR (CDCl 3 , δ ppm)
0.86 to 0.90 (3H, t), 1.26 (20H, s),
1.59 to 1.70 (4H, m), 3.46 to 3.52 (4H, m),
5.59 (1H, b), 5.68-5.90 (1H, dq),
8.45 (1H, s)
[0036]
(3) Synthesis of Other Compound (1) in Table 1 According to the method described in (1) and (2) above, the other compound (1) in Table 1 was synthesized.
Table 1 shows the compound (1) synthesized as described above and the physical properties thereof.
[0037]
[Table 1]
Figure 0004449229
[0038]
Example 2 [Preparation of formulation]
(1) Preparation of Granules 5 parts by weight of compound (1), 35 parts by weight of bentonite, 57 parts by weight of talc, 1 part by weight of Neorex powder (trade name; manufactured by Kao Corporation) and 2 parts by weight of sodium lignin sulfonate After mixing uniformly, a small amount of water was added and kneaded, and then granulated and dried to obtain granules.
[0039]
(2) Preparation of wettable powder 10 parts by weight of compound (1), 70 parts by weight of kaolin, 18 parts by weight of white carbon, 1.5 parts by weight of Neorex powder (trade name; manufactured by Kao Corporation) and demole (trade name) A product of Kao Co., Ltd.) 0.5 parts by weight was uniformly mixed and then pulverized to obtain a wettable powder.
[0040]
(3) Preparation of Emulsion To 20 parts by weight of Compound (1) and 70 parts by weight of xylene, 10 parts by weight of Toxanone (trade name; manufactured by Sanyo Chemical Industries) was added and mixed uniformly and dissolved to obtain an emulsion.
[0041]
(4) Preparation of powder A powder was obtained by uniformly mixing 5 parts by weight of powder (1), 50 parts by weight of talc and 45 parts by weight of kaolin.
[0042]
Example 3 [Efficacy test]
(1) Efficacy test against stink bug Each wettable powder of compound (1) shown in Table 1 prepared according to Example 2 was diluted to 1000 ppm with water containing a surfactant (0.01%), and each of these chemical solutions Cabbage leaf pieces (5 cm × 5 cm) were soaked in the interior for 30 seconds, put one by one in each plastic cup, and air-dried.
Next, 10 caterpillars (3rd instar larvae) are released in these cups, covered, and left in a constant temperature room at 25 ° C. After 2 days, the number of live and dead insects in each cup is counted to determine the death rate. It was.
As a result, Compounds 9, 11, 12, 15, and 16 showed 80% or more insecticidal activity.
[0043]
(2) Efficacy test against peach aphid Each wettable powder of compound (1) shown in Table 1 prepared according to Example 2 was diluted to 100 ppm with water containing a surfactant (0.01%). Cabbage leaf pieces (5 cm × 5 cm) were soaked in each chemical solution for 30 seconds, put one by one in each plastic cup, and air-dried.
Next, 10 peach aphids (adult female adults) were released in these cups, covered, and allowed to stand in a constant temperature room at 25 ° C. After 3 days, life and death of adult females and larvae in each cup The number was counted to determine the death rate.
As a result, compounds 6, 9, 11, 12, 15, and 16 showed 80% or more insecticidal activity.
[0044]
(3) Antibacterial test A plate medium was prepared by mixing an acetone solution of the compound (1) shown in Table 1 in a PDA (potato dextrose agar) medium to a final concentration of 40 ppm.
The flora of Prunus ash rot and rice blast fungus previously grown on a PDA plate medium was cut into 1 mm squares with a scalpel and inoculated into the prepared plate medium with a drug.
The cells were cultured at 25 ° C. in the dark for 3 days, the drug-free group and the flora diameter were compared, and the fungus growth inhibition rate (%) was determined by the following formula.
[0045]
[Expression 1]
Figure 0004449229
[0046]
Judgment of the effect is as follows: the bacterial flora inhibition rate is 95-100%, 5,85-95%, 4,85-70%, 3,45-70%, 2,10-45, 1,10-0% 0 As mentioned above, it was performed in 6 stages of 5-0.
As a result, the compounds 4-6, 9-12, 15, 16 have an effect of 4 or more against the plum blight fungus, and the compounds 4, 6, 9, 11, 12, 15, 16 have an effect on rice blast fungus. The effect of 3 or more was shown.
[0047]
【The invention's effect】
The novel 6- (1-fluoroethyl) -5-iodo-4-alkylaminopyrimidine derivative of the present invention has an excellent agricultural and horticultural pest control effect.

Claims (3)

次式(1):
Figure 0004449229
(式中、Rは、炭素原子数1〜20個の直鎖状又は分岐状アルキル基を表わし;*は、不斉炭素原子を表わす。)
で示される6−(1−フルオロエチル)−5−ヨード−4−アルキルアミノピリミジン誘導体。
The following formula (1):
Figure 0004449229
(In the formula, R represents a linear or branched alkyl group having 1 to 20 carbon atoms; * represents an asymmetric carbon atom.)
A 6- (1-fluoroethyl) -5-iodo-4-alkylaminopyrimidine derivative represented by the formula:
次式(2):
Figure 0004449229
(式中、*は、請求項1の記載と同義である。)
で示される4−クロロ−6−(1−フルオロエチル)−5−ヨードピリミジンと
次式(3):
Figure 0004449229
(式中、Rは、請求項1の記載と同義である。)
で示されるアルキルアミン類とを反応させることを特徴とする請求項1記載の式(1)で示される6−(1−フルオロエチル)−5−ヨード−4−アルキルアミノピリミジン誘導体の製法。
Formula (2):
Figure 0004449229
(In the formula, * is as defined in claim 1.)
4-chloro-6- (1-fluoroethyl) -5-iodopyrimidine represented by the following formula (3):
Figure 0004449229
(Wherein R has the same meaning as described in claim 1).
A process for producing a 6- (1-fluoroethyl) -5-iodo-4-alkylaminopyrimidine derivative represented by the formula (1) according to claim 1, wherein the alkylamine is represented by the following reaction:
請求項1に記載の式(1)で示される6−(1−フルオロエチル)−5−ヨード−4−アルキルアミノピリミジン誘導体を有効成分とする有害生物防除剤。A pest control agent comprising a 6- (1-fluoroethyl) -5-iodo-4-alkylaminopyrimidine derivative represented by the formula (1) according to claim 1 as an active ingredient.
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