JP2004175761A - METHOD FOR PRODUCING 10,11-DIHYDRO-10-OXO-5H-DIBENZO[b,f]AZEPINE-5-CARBOXAMIDE - Google Patents

METHOD FOR PRODUCING 10,11-DIHYDRO-10-OXO-5H-DIBENZO[b,f]AZEPINE-5-CARBOXAMIDE Download PDF

Info

Publication number
JP2004175761A
JP2004175761A JP2002346547A JP2002346547A JP2004175761A JP 2004175761 A JP2004175761 A JP 2004175761A JP 2002346547 A JP2002346547 A JP 2002346547A JP 2002346547 A JP2002346547 A JP 2002346547A JP 2004175761 A JP2004175761 A JP 2004175761A
Authority
JP
Japan
Prior art keywords
dibenzo
azepine
dihydro
carboxamide
oxo
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP2002346547A
Other languages
Japanese (ja)
Inventor
Hideki Takeuchi
竹内  秀樹
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kissei Pharmaceutical Co Ltd
Original Assignee
Kissei Pharmaceutical Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kissei Pharmaceutical Co Ltd filed Critical Kissei Pharmaceutical Co Ltd
Priority to JP2002346547A priority Critical patent/JP2004175761A/en
Publication of JP2004175761A publication Critical patent/JP2004175761A/en
Pending legal-status Critical Current

Links

Abstract

<P>PROBLEM TO BE SOLVED: To provide a practical and safe method to be applied to a dibenzo[b,f]azepine derivative and stably producing 10,11-dihydro-10-oxo-5H-dibenzo[b,f]azepine-5-carboxamide useful as a medicine on an industrial scale. <P>SOLUTION: 10,11-Dihydro-10-oxo-5H-dibenzo[b,f]azepine-5-carboxamide useful as a medicine can be produced by hydrogenating 10,11-epoxy-10,11-dihydro-5H-dibenzo[b,f]azepine-5-carboxamide in the presence of a catalyst and oxidizing the obtained 10,11-dihydro-10-hydroxy-5H-dibenzo[b,f]azepine-5-carboxamide with dimethyl sulfoxide and its activation agent. <P>COPYRIGHT: (C)2004,JPO

Description

【0001】
【発明の属する技術分野】
本発明は、医薬品、例えば中枢および末梢神経系の障害の治療剤として有用な式、
【0002】
【化6】

Figure 2004175761
【0003】
で表される10,11−ジヒドロ−10−オキソ−5H−ジベンゾ〔b,f〕アゼピン−5−カルボキサミドの製造法に関するものである。さらに詳しくは、式、
【0004】
【化7】
Figure 2004175761
【0005】
で表される10,11−エポキシ−10,11−ジヒドロ−5H−ジベンゾ〔b,f〕アゼピン−5−カルボキサミドを触媒下水素添加することにより得られる、式
【0006】
【化8】
Figure 2004175761
【0007】
で表される10,11−ジヒドロ−10−ヒドロキシ−5H−ジベンゾ〔b,f〕アゼピン−5−カルボキサミドを製し、得られるされる10,11−ジヒドロ−10−ヒドロキシ−5H−ジベンゾ〔b,f〕アゼピン−5−カルボキサミドをジメチルスルホキシドおよびその活性化剤を用いて酸化し、前記式(I)で表される10,11−ジヒドロ−10−オキソ−5H−ジベンゾ〔b,f〕アゼピン−5−カルボキサミドを製造する方法に関するものである。
【0008】
【従来の技術】
これまで10位にヒドロキシ基を有するジベンゾ〔b,f〕アゼピン誘導体のヒドロキシ基を酸化する方法としては、5−シアノ−10−ヒドロキシ−10,11−ジヒドロ−5H−ジベンゾ〔b,f〕アゼピンに対し次亜塩素酸ナトリウムおよび2,2,6,6−テトラメチルピペリジンニトロキシドを酸化剤として用いて5−シアノ−10,11−ジヒドロ−10−オキソ−5H−ジベンゾ〔b,f〕アゼピンを製造する方法が報告されている(例えば、特許文献1参照。)。
【0009】
また、前述のジベンゾ〔b,f〕アゼピン類似の骨格で10位にヒドロキシ基を有する誘導体を酸化する方法としては、5−シアノ−10,11−ジヒドロ−10−ヒドロキシ−5H−ジベンゾ〔a,d〕シクロヘプテンを無水クロム酸−硫酸混合酸化剤(以下ジョーンズ試薬という)を用いて5−シアノ−10,11−ジヒドロ−10−オキソ−5H−ジベンゾ〔a,d〕シクロヘプテンを製造する方法が報告されている(例えば、特許文献2参照。)。
【0010】
一方、本発明の製造方法の原料物質あるいは製造中間体である前記式(III)で表される10,11−ジヒドロ−10−ヒドロキシ−5H−ジベンゾ〔b,f〕アゼピン−5−カルボキサミドは、本発明の目的物である前記式(I)で表される10,11−ジヒドロ−10−オキソ−5H−ジベンゾ〔b,f〕アゼピン−5−カルボキサミドを還元することにより製造する方法(例えば、特許文献3参照。)、若しくは、式
【0011】
【化9】
Figure 2004175761
【0012】
で表される5H−ジベンゾ〔b,f〕アゼピン−5−カルボキサミドに対し特別な微生物を作用させる方法(例えば、非特許文献1参照。)などが報告されている。
【0013】
【特許文献1】
欧州特許出願公開第1127877号明細書
【特許文献2】
米国特許第3641038号明細書
【特許文献3】
英国特許第1310120号明細書
【非特許文献1】
Mattthias Kittelmann、外3名、「Preparation of 10,11−epoxycarbazepine and10,11−dihydrocarbazepine and 10,11−dihydro−10−hydroxycarbamazepine by microbial epoxidation and hydroxylation」,Bioscience Biotechnology and Biochemistry,1993年,第57巻,第9号,p.1589−1590
【0014】
【発明が解決しようとする課題】
特許文献1で報告されているジベンゾ〔b,f〕アゼピン骨格における10位のヒドロキシ基を酸化する方法は、5−シアノ−10,11−ジヒドロ−10−ヒドロキシ−5H−ジベンゾ〔b,f〕アゼピンを次亜塩素酸ナトリウムおよびニトロキシド誘導体を用いて酸化する方法であり、この方法は、水−水難溶性有機溶媒の二層系で実施する必要がある。しかしながら、このような不均一系の反応は撹拌効率の調整、反応温度の制御、反応進行度の確認が困難であるという問題を有している。これら、撹拌効率の調整、反応温度の制御、反応進行度の確認といった事項は、安定して製造物を得るために必要とされているものであるから、特許文献1に記載されている次亜塩素酸ナトリウムとニトロキシド誘導体を用いる酸化反応は工業的な製造方法とは成り難いものである。
【0015】
さらに、該酸化方法は反応条件として反応溶液中のpHを8〜9の間に保持することが要求され、このように狭い範囲にpHを保つためには、pHが上記範囲から逸脱しないよう監視するための特別な装置を必要としたり、pHが上記範囲から逸脱した場合は直ちに正常なpH範囲に調整しなければならないといった煩雑な作業を要するという問題も有している。
【0016】
本発明者は、特許文献1で報告されている酸化反応を、前記式(III)で表される10,11−ジヒドロ−10−ヒドロキシ−5H−ジベンゾ〔b,f〕アゼピン−5−カルボキサミドに対して適用したが、カルバモイル基の脱離という副反応が進行するのみで、目的とする前記式(I)で表される10,11−ジヒドロ−10−オキソ−5H−ジベンゾ〔b,f〕アゼピン−5−カルボキサミドを得ることはできなかった。また、特許文献1に従い種々条件を変えた場合でも副反応を抑えることはできなかった。
【0017】
一方、ジベンゾ〔b,f〕アゼピン類似骨格を有する化合物の10位のヒドロキシ基を酸化する方法としては、ジベンゾ〔a,d〕シクロヘプテン誘導体の10位のヒドロキシ基をジョーンズ試薬を用いて酸化する方法が特許文献2に報告されている。しかしながら、ジョーンズ試薬に使用するクロム酸は、国際ガン研究機関(IARC)によって一番発がん性の高いクラス1に指定されているように、人体に対して非常に毒性が高いものである。そのため、クロム酸を医薬品の製造行程に使用した場合は、人体への影響を最小限に抑えるために、医薬品中に使用した重金属が混入しないように特別な精製工程を必要としたり、医薬品中の残留金属の濃度確認の為の様々な検査項目を実施しなければならず安全上の問題や製造コスト上の問題を有している。このように、特許文献2に記載の方法は、医薬品の製造方法としては極めて不適な製造方法である。
【0018】
その上、クロム酸を使用した製造方法は、環境への影響を最小限にするための特別な処理を実施することが「毒物および劇物取締法」にて指示されているように、公害の元になる多量の重金属を含んだ廃棄物を産出するものであり、環境衛生上の問題や公害対策費としての製造コストの問題が大きいものでもある。
【0019】
以上のようにこれまで報告されているジベンゾ〔b,f〕アゼピン骨格、または類似骨格の10位にヒドロキシ基を有する誘導体の酸化方法は、その工業的規模での実施において安定して製造物を得るのが困難であったり、毒性の高いクロム酸を用いる方法であり、本発明の医薬品として有用な前記式(I)で表される10,11−ジヒドロ−10−オキソ−5H−ジベンゾ〔b,f〕アゼピン−5−カルボキサミドの製造方法には適応できない方法である。
【0020】
本発明の目的は、ジベンゾ〔b,f〕アゼピン誘導体に適用し、医薬品として有用な前記式(I)で表される10,11−ジヒドロ−10−オキソ−5H−ジベンゾ〔b,f〕アゼピン−5−カルボキサミドを工業的規模でも安定して供給することのできる、実用的で安全性の高い製造方法を提供するものである。
【0021】
【課題を解決するための手段】
本発明者は、前記式(I)で表される10,11−ジヒドロ−10−オキソ−5H−ジベンゾ〔b,f〕アゼピン−5−カルボキサミドの実用的で安全性の高い製造法について鋭意検討した結果、前記式(III)で表される10,11−ジヒドロ−10−ヒドロキシ−5H−ジベンゾ〔b,f〕アゼピン−5−カルボキサミドをジメチルスルホキシドおよびその活性化剤を用いて酸化することにより、前記式(I)で表される10,11−ジヒドロ−10−オキソ−5H−ジベンゾ〔b,f〕アゼピン−5−カルボキサミドを収率良く得ることができることを見いだした。
【0022】
また、酸化反応の原料として使用する前記式(III)で表される10,11−ジヒドロ−10−ヒドロキシ−5H−ジベンゾ〔b,f〕アゼピン−5−カルボキサミドについても、前記式(II)で表される10,11−エポキシ−10,11−ジヒドロ−5H−ジベンゾ〔b,f〕アゼピン−5−カルボキサミドを触媒存在下水素添加することにより収率良く製造することが可能なことを見いだした。
【0023】
以上の製造方法は工業的規模の実施においても安定して、医薬品として有用な前記式(I)で表される10,11−ジヒドロ−10−オキソ−5H−ジベンゾ〔b,f〕アゼピン−5−カルボキサミド供給することのできる実用的で安全性の高い製造方法を提供するものであり、本発明はこれら一連の知見に基づき成されたものである。
【0024】
以下、本発明を詳細に説明する。本発明においてジメチルスルホキシドは酸化剤として作用し、前記式(III)で表される10,11−ジヒドロ−10−ヒドロキシ−5H−ジベンゾ〔b,f〕アゼピン−5−カルボキサミドに対して1当量以上使用することにより収率良く前記式(I)で表される10,11−ジヒドロ−10−オキソ−5H−ジベンゾ〔b,f〕アゼピン−5−カルボキサミドを得ることが出来る。この場合、ジメチルスルホキシドは酸化剤として使用すると同時に反応溶媒として使用するのが好ましく、反応溶媒を兼ねて使用する場合は10,11−ジヒドロ−10−ヒドロキシ−5H−ジベンゾ〔b,f〕アゼピン−5−カルボキサミドに対して5〜30重量倍使用するのが好ましい。また、ジメチルスルホキシドを溶媒として使用しない場合は、反応に害を加えない有機溶媒を使用することができ、例えば、塩化メチレン、クロロホルム、ジエチルエーテル、テトラヒドロフラン等の有機溶媒を用いることができ、これらの中ではテトラヒドロフランが好ましい。
【0025】
本発明におけるジメチルスルホキシドの活性化剤とは、ジメチルスルホキシドを活性化する作用を有する試薬を意味し、塩基存在下使用する。活性化剤としては、例えば、三酸化硫黄−トリエチルアミン錯体、三酸化硫黄−トリメチルアミン錯体、三酸化硫黄−ピリジン錯体、塩化オキザリル、塩化チオニル、無水酢酸があげられ、中でも三酸化硫黄−ピリジン錯体を使用するのが好ましい。使用する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、N−メチルピペリジンなどの第3級アミンが挙げられ、中でもトリエチルアミン、ジイソプロピルエチルアミンが好ましい。塩基の使用量は、塩基の種類にもよるが前記式(III)で表される10,11−ジヒドロ−10−ヒドロキシ−5H−ジベンゾ〔b,f〕アゼピン−5−カルボキサミドに対して1〜8当量用いるのが好ましい。
【0026】
活性化剤の使用量は、活性化剤の種類により異なるが、前記式(III)で表される10,11−ジヒドロ−10−ヒドロキシ−5H−ジベンゾ〔b,f〕アゼピン−5−カルボキサミドに対して通常1〜5当量使用するのが好ましい。
【0027】
反応温度は、使用するジメチルスルホキシドの活性化剤、溶媒の種類により異なるが概ね20〜40℃で行うのが好ましく、反応時間は概ね1〜24時間で行うのが好ましい。
【0028】
反応終了時の処理は、反応系に水を添加した後、析出物をろ取するか若しくは必要に応じて有機溶媒で抽出することにより前記式(III)で表される10,11−ジヒドロ−10−ヒドロキシ−5H−ジベンゾ〔b,f〕アゼピン−5−カルボキサミドを得ることができる。また、反応処理時に水の代わりに10%過酸化水素水を添加し、室温下1〜6時間撹拌した後、析出物をろ取するか若しくは必要に応じて有機溶媒で抽出することによっても前記式(III)で表される10,11−ジヒドロ−10−ヒドロキシ−5H−ジベンゾ〔b,f〕アゼピン−5−カルボキサミドを得ることができる。
【0029】
本発明の原料若しくは製造中間体として用いる前記式(III)で表される10,11−ジヒドロ−10−ヒドロキシ−5H−ジベンゾ〔b,f〕アゼピン−5−カルボキサミドは、前記式(II)で表される10,11−エポキシ−10,11−ジヒドロ−5H−ジベンゾ〔b,f〕アゼピン−5−カルボキサミドを、触媒存在下水素添加することにより製造することができる。本反応で得られる前記式(II)で表される10,11−エポキシ−10,11−ジヒドロ−5H−ジベンゾ〔b,f〕アゼピン−5−カルボキサミドは単離してもよいが、水素添加時の触媒をろ別したろ液のまま、あるいは触媒をろ別いたろ液の溶媒を留去するのみで次の酸化反応に使用することができる。本発明のこの製造方法はこれまで報告されているような特別な微生物を使用しないので、特殊な製造設備や製造技術を要しなくて済み、操作性および製造コスト上工業的規模での実施において有利である。
【0030】
水素添加に用いる触媒としては、パラジウム−炭素、パラジウム−硫酸バリウム、パラジウム−炭酸カルシウム等を用いることができ、中でもパラジウム−炭素が好ましい。水添触媒の使用量は用いる触媒の種類により異なるが、10%パラジウム−炭素を用いる場合は、前記式(II)で表される10,11−エポキシ−10,11−ジヒドロ−5H−ジベンゾ〔b,f〕アゼピン−5−カルボキサミドに対して1〜5重量%用いるのが好ましい。
【0031】
触媒による水素添加反応は、前記式(II)で表される10,11−エポキシ−10,11−ジヒドロ−5H−ジベンゾ〔b,f〕アゼピン−5−カルボキサミドを、水、ジオキサン、テトラヒドロフラン、ジエチルエーテル、メタノール、エタノール、酢酸エチル等から選ばれる1種類、若しくは混合物を溶媒として用い、常圧または加圧下で水添することにより収率良く得ることができ、中でも溶媒はメタノールが好ましい。反応温度としては用いる水添触媒の種類や溶媒により異なるが、通常0℃〜溶媒の還流温度で行われ、好ましくは室温〜40℃である。
【0032】
本発明をより好適に実施する方法としては、前記式(II)で表される10,11−エポキシ−10,11−ジヒドロ−5H−ジベンゾ〔b,f〕アゼピン−5−カルボキサミドを、メタノール中4重量%の10%パラジウム−炭素を用い常圧下室温にて10〜15時間水添を行うことにより前記式(III)で表される10,11−ジヒドロ−10−ヒドロキシ−5H−ジベンゾ〔b,f〕アゼピン−5−カルボキサミドを製造し、次いでこれをジメチルスルホキシド中3当量のトリエチルアミンもしくはジイソプロピルエチルアミン存在下3当量の三酸化硫黄−ピリジン錯体を酸化剤として用い、室温にて0.5〜2時間酸化する方法である。得られた反応生成物は、反応混合物に対し10%過酸化水素水を添加し室温にて1〜6時間撹拌後、析出した結晶をろ取し、次いでそれを乾燥することにより前記式(I)で表される10,11−ジヒドロ−10−オキソ−5H−ジベンゾ〔b,f〕アゼピン−5−カルボキサミドを得ることができる。
【0033】
本発明の製造原料である前記式(II)で表される10,11−エポキシ−10,11−ジヒドロ−5H−ジベンゾ〔b,f〕アゼピン−5−カルボキサミドは、前記式(IV)で表される5H−ジベンゾ〔b,f〕アゼピン−5−カルボキサミドに対して通常のエポキシ化の反応条件で処理することにより得ることができ、例えば重炭酸ナトリウム存在下Oxone(登録商標)を用いて酸化することにより収率良く得ることができる。
【0034】
【発明の実施の形態】
本発明の内容を以下の参考例および実施例にてさらに詳しく説明するが、本発明は、これらに限定されるものではない。
【0035】
【実施例】
参考例1
10,11−エポキシ−10,11−ジヒドロ−5H−ジベンゾ〔b,f〕アゼピン−5−カルボキサミド
5H−ジベンゾ〔b,f〕アゼピン−5−カルボキサミド20.0gおよび炭酸水素ナトリウム57.0gのアセトン400mL−水400mLの懸濁液に室温下Oxone(登録商標)104.0gを加え、同温にて11時間撹拌した後20%亜硫酸ナトリウム水溶液110mLを室温下加え、さらに同温にて1時間撹拌した。反応液を半分まで減圧下濃縮した後、析出した結晶をろ取し水で洗浄後減圧下乾燥し10,11−エポキシ−10,11−ジヒドロ−5H−ジベンゾ〔b,f〕アゼピン−5−カルボキサミド20.3gを得た。
【0036】
NMR(CDCl) δ ppm:
4.29 (2H, s), 4.55 (2H, s), 7.55−7.30 (8H, m)
【0037】
実施例1
10,11−ジヒドロ−10−オキソ−5H−ジベンゾ〔b,f〕アゼピン−5−カルボキサミド
10,11−エポキシ−10,11−ジヒドロ−5H−ジベンゾ〔b,f〕アゼピン−5−カルボキサミド10.3gのメタノール100mL懸濁液に10%パラジウム−炭素0.412gを加え、水素雰囲気下室温にて13時間撹拌した。不溶物をろ去し、ろ液を減圧下濃縮乾固し、残留物を酢酸エチルより結晶化し10,11−ジヒドロ−10−ヒドロキシ−5H−ジベンゾ〔b,f〕アゼピン−5−カルボキサミド9.4gを得た。得られた10,11−ジヒドロ−10−ヒドロキシ−5H−ジベンゾ〔b,f〕アゼピン−5−カルボキサミド3.0gのジメチルスルホキシド8.4mL溶液に、三酸化硫黄−ピリジン錯体3.76gのジメチルスルホキシド15mL溶液を室温にて30分間撹拌した後トリエチルアミン3.29mLを加え同温にて5分間撹拌した溶液を、室温下15分間かけて滴下し、滴下終了後同温にてさらに1時間撹拌した。室温下反応混合物に水8.5mLを加えた後、さらに10%過酸化水素水81mLを加え同温にて4時間撹拌した。析出物をろ取し、水で洗浄した後、ギ酸−水より再結晶し10,11−ジヒドロ−10−オキソ−5H−ジベンゾ〔b,f〕アゼピン−5−カルボキサミド1.53gを得た。
【0038】
NMR(CDCl) δ ppm:
3.85 (2H, d, J=14.0Hz), 4.45 (2H, d, J=14.0Hz), 7.30−7.70 (7H, m), 8.11 (1H, d, J=8.0Hz)
【0039】
実施例2
10,11−ジヒドロ−10−オキソ−5H−ジベンゾ〔b,f〕アゼピン−5−カルボキサミド
10,11−ジヒドロ−10−ヒドロキシ−5H−ジベンゾ〔b,f〕アゼピン−5−カルボキサミド3.0gのジメチルスルホキシド27.7mL溶液に、室温下撹拌しながらトリエチルアミン4.93mLを加え、次いで三酸化硫黄−ピリジン錯体5.63gを少しづづ加えた。室温下1.5時間撹拌した後、水60mLを加えた。析出物をろ取し、水で洗浄した後、ギ酸−水より再結晶し10,11−ジヒドロ−10−オキソ−5H−ジベンゾ〔b,f〕アゼピン−5−カルボキサミド1.67gを得た。
【0040】
NMR(CDCl) δ ppm:
3.85 (2H, d, J=14.0Hz), 4.45 (2H, d, J=14.0Hz), 7.30−7.70 (7H, m), 8.11 (1H, d, J=8.0Hz)
【0041】
実施例3
10,11−ジヒドロ−10−オキソ−5H−ジベンゾ〔b,f〕アゼピン−5−カルボキサミド
10,11−ジヒドロ−10−ヒドロキシ−5H−ジベンゾ〔b,f〕アゼピン−5−カルボキサミド3.0gのジメチルスルホキシド8.4mLの溶液に、室温下撹拌しながらジイソプロピルエチルアミン3.05gを加え、次いで三酸化硫黄−ピリジン錯体3.76gのジメチルスルホキシド15mL溶液を15分間かけて滴下した。さらに同温にて1時間撹拌した後、30%過酸化水素水2.7mLと水87.3mLの混合液を22分間かけて滴下し、同温で4時間撹拌した。析出物をろ取し、水で洗浄した後、ギ酸−水より再結晶し10,11−ジヒドロ−10−オキソ−5H−ジベンゾ〔b,f〕アゼピン−5−カルボキサミド2.26gを得た。
【0042】
NMR(CDCl) δ ppm:
3.85 (2H, d, J=14.0Hz), 4.45 (2H, d, J=14.0Hz), 7.30−7.70 (7H, m), 8.11 (1H, d, J=8.0Hz)
【発明の効果】
以上のように、本発明は医薬品として有用な前記式(I)で表される10,11−ジヒドロ−10−オキソ−5H−ジベンゾ〔b,f〕アゼピン−5−カルボキサミドの工業的規模での製造を可能にするものであり、取り扱いが容易で安全性の高い試薬を用いて、反応の制御が容易な系で実施することができるので、安全性が高く実用的かつ効果的な製造方法である。しかも、クロム酸を一切使用しないため、安全性の高い医薬品を供給することができるものである。[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention provides a pharmaceutical, for example, a formula useful as a therapeutic agent for disorders of the central and peripheral nervous system,
[0002]
Embedded image
Figure 2004175761
[0003]
And a process for producing 10,11-dihydro-10-oxo-5H-dibenzo [b, f] azepine-5-carboxamide represented by the formula: More specifically, the formula,
[0004]
Embedded image
Figure 2004175761
[0005]
A compound obtained by hydrogenating 10,11-epoxy-10,11-dihydro-5H-dibenzo [b, f] azepine-5-carboxamide represented by the following formula:
Embedded image
Figure 2004175761
[0007]
10,11-dihydro-10-hydroxy-5H-dibenzo [b, f] azepine-5-carboxamide represented by the following formula, and the resulting 10,11-dihydro-10-hydroxy-5H-dibenzo [b , F] azepine-5-carboxamide is oxidized with dimethylsulfoxide and its activator to give 10,11-dihydro-10-oxo-5H-dibenzo [b, f] azepine represented by the above formula (I). The present invention relates to a method for producing 5-carboxamide.
[0008]
[Prior art]
Heretofore, as a method of oxidizing the hydroxy group of a dibenzo [b, f] azepine derivative having a hydroxy group at the 10-position, 5-cyano-10-hydroxy-10,11-dihydro-5H-dibenzo [b, f] azepine On the other hand, 5-cyano-10,11-dihydro-10-oxo-5H-dibenzo [b, f] azepine was prepared using sodium hypochlorite and 2,2,6,6-tetramethylpiperidine nitroxide as oxidizing agents. A production method has been reported (for example, see Patent Document 1).
[0009]
As a method for oxidizing a derivative having a hydroxy group at the 10-position with a skeleton similar to dibenzo [b, f] azepine described above, 5-cyano-10,11-dihydro-10-hydroxy-5H-dibenzo [a, d] A method for producing 5-cyano-10,11-dihydro-10-oxo-5H-dibenzo [a, d] cycloheptene using cycloheptene using a mixed oxidizing agent of chromic anhydride and sulfuric acid (hereinafter referred to as Jones reagent). (See, for example, Patent Document 2).
[0010]
On the other hand, 10,11-dihydro-10-hydroxy-5H-dibenzo [b, f] azepine-5-carboxamide represented by the formula (III), which is a raw material or a production intermediate of the production method of the present invention, comprises: A method for producing by reducing the 11,11-dihydro-10-oxo-5H-dibenzo [b, f] azepine-5-carboxamide represented by the formula (I), which is the object of the present invention (for example, Patent Document 3) or the formula:
Embedded image
Figure 2004175761
[0012]
(5) A method of causing a special microorganism to act on 5H-dibenzo [b, f] azepine-5-carboxamide represented by the formula (for example, see Non-Patent Document 1).
[0013]
[Patent Document 1]
European Patent Application Publication No. 1127877 [Patent Document 2]
US Pat. No. 3,641,038 [Patent Document 3]
British Patent No. 1310120 [Non-Patent Document 1]
Mattthias Kittelmann, and three others, "Preparation of 10,11-epoxycarbazepine and10,11-dihydrocarbazepine and 10,11-dihydro-10-hydroxycarbamazepine by microbial epoxidation and hydroxylation", Bioscience Biotechnology and Biochemistry, 1993 years, Vol. 57, No. No. 9, p. 1589-1590
[0014]
[Problems to be solved by the invention]
The method for oxidizing the hydroxy group at the 10-position in the dibenzo [b, f] azepine skeleton reported in Patent Document 1 is based on 5-cyano-10,11-dihydro-10-hydroxy-5H-dibenzo [b, f]. This is a method of oxidizing azepine using sodium hypochlorite and a nitroxide derivative, and this method needs to be carried out in a two-layer system of a water-water-insoluble organic solvent. However, such a heterogeneous reaction has a problem that it is difficult to adjust the stirring efficiency, control the reaction temperature, and confirm the degree of progress of the reaction. Since these items such as adjustment of stirring efficiency, control of reaction temperature, and confirmation of reaction progress are required to stably obtain a product, the following sub-patents described in Patent Document 1 are used. An oxidation reaction using sodium chlorate and a nitroxide derivative is unlikely to be an industrial production method.
[0015]
Further, the oxidation method requires that the pH of the reaction solution be maintained between 8 and 9 as a reaction condition. In order to maintain the pH in such a narrow range, the pH is monitored so as not to deviate from the above range. In addition, there is also a problem that a special device for performing the operation is required, and a complicated operation is required such that when the pH deviates from the above range, the pH must be immediately adjusted to a normal pH range.
[0016]
The present inventors converted the oxidation reaction reported in Patent Document 1 to 10,11-dihydro-10-hydroxy-5H-dibenzo [b, f] azepine-5-carboxamide represented by the above formula (III). However, only the side reaction of elimination of the carbamoyl group proceeds, and the desired 10,11-dihydro-10-oxo-5H-dibenzo [b, f] represented by the above formula (I) is applied. Azepine-5-carboxamide could not be obtained. Further, even when various conditions were changed in accordance with Patent Document 1, the side reaction could not be suppressed.
[0017]
On the other hand, as a method for oxidizing the 10-position hydroxy group of a compound having a dibenzo [b, f] azepine-like skeleton, a method of oxidizing the 10-position hydroxy group of a dibenzo [a, d] cycloheptene derivative using a Jones reagent is used. Is reported in Patent Document 2. However, the chromic acid used in the Jones reagent is extremely toxic to the human body, as specified by the International Agency for Research on Cancer (IARC) as the most carcinogenic Class 1. Therefore, when chromic acid is used in the manufacturing process of pharmaceutical products, a special purification process is required to prevent the heavy metals used in the pharmaceutical products from being mixed in order to minimize the effects on the human body. It is necessary to carry out various inspection items for confirming the concentration of the residual metal, and there are safety problems and manufacturing cost problems. As described above, the method described in Patent Document 2 is an extremely inappropriate manufacturing method as a method for manufacturing a pharmaceutical.
[0018]
In addition, the production method using chromic acid can reduce pollution, as stipulated in the Toxic Substances and Deleterious Substances Control Law to implement special treatment to minimize the impact on the environment. It produces waste containing a large amount of heavy metals, which is the source of the waste, and has a great problem of environmental hygiene and a problem of manufacturing cost as a pollution control cost.
[0019]
As described above, the oxidation method of a derivative having a hydroxy group at the 10-position of a dibenzo [b, f] azepine skeleton or a similar skeleton reported so far can stably produce a product in an industrial scale. It is a method using chromic acid which is difficult to obtain or has high toxicity, and is useful as the pharmaceutical of the present invention, and represented by the above formula (I), 10,11-dihydro-10-oxo-5H-dibenzo [b , F] azepine-5-carboxamide.
[0020]
An object of the present invention is to apply a dibenzo [b, f] azepine derivative to a 10,11-dihydro-10-oxo-5H-dibenzo [b, f] azepine represented by the above formula (I), which is useful as a pharmaceutical. It is intended to provide a practical and highly safe production method capable of stably supplying -5-carboxamide even on an industrial scale.
[0021]
[Means for Solving the Problems]
Means for Solving the Problems The present inventors have earnestly studied a practical and highly safe production method of 10,11-dihydro-10-oxo-5H-dibenzo [b, f] azepine-5-carboxamide represented by the above formula (I). As a result, by oxidizing 10,11-dihydro-10-hydroxy-5H-dibenzo [b, f] azepine-5-carboxamide represented by the above formula (III) using dimethyl sulfoxide and an activator thereof, It has been found that 10,11-dihydro-10-oxo-5H-dibenzo [b, f] azepine-5-carboxamide represented by the formula (I) can be obtained in good yield.
[0022]
Further, the 10,11-dihydro-10-hydroxy-5H-dibenzo [b, f] azepine-5-carboxamide represented by the formula (III) used as a raw material for the oxidation reaction is also represented by the formula (II). It has been found that the compound can be produced in good yield by hydrogenating the represented 10,11-epoxy-10,11-dihydro-5H-dibenzo [b, f] azepine-5-carboxamide in the presence of a catalyst. .
[0023]
The above-mentioned production method is stable even on an industrial scale, and is useful as a medicament for the preparation of 10,11-dihydro-10-oxo-5H-dibenzo [b, f] azepine-5 represented by the above formula (I). -It is intended to provide a practical and highly safe production method capable of supplying carboxamide, and the present invention has been made based on these series of findings.
[0024]
Hereinafter, the present invention will be described in detail. In the present invention, dimethyl sulfoxide acts as an oxidizing agent, and at least 1 equivalent of 10,11-dihydro-10-hydroxy-5H-dibenzo [b, f] azepine-5-carboxamide represented by the above formula (III). By using the compound, 10,11-dihydro-10-oxo-5H-dibenzo [b, f] azepine-5-carboxamide represented by the above formula (I) can be obtained in good yield. In this case, dimethyl sulfoxide is preferably used as a reaction solvent at the same time as being used as an oxidizing agent. When used also as a reaction solvent, 10,11-dihydro-10-hydroxy-5H-dibenzo [b, f] azepine- It is preferable to use 5 to 30 times by weight of 5-carboxamide. When dimethyl sulfoxide is not used as a solvent, an organic solvent that does not harm the reaction can be used.For example, organic solvents such as methylene chloride, chloroform, diethyl ether, and tetrahydrofuran can be used. Among them, tetrahydrofuran is preferred.
[0025]
The activator of dimethyl sulfoxide in the present invention means a reagent having an action of activating dimethyl sulfoxide, and is used in the presence of a base. Examples of the activator include sulfur trioxide-triethylamine complex, sulfur trioxide-trimethylamine complex, sulfur trioxide-pyridine complex, oxalyl chloride, thionyl chloride, and acetic anhydride, and among them, sulfur trioxide-pyridine complex is used. Is preferred. Examples of the base used include tertiary amines such as triethylamine, diisopropylethylamine, and N-methylpiperidine, and among them, triethylamine and diisopropylethylamine are preferable. Although the amount of the base used depends on the kind of the base, it is 1 to 10-11-dihydro-10-hydroxy-5H-dibenzo [b, f] azepine-5-carboxamide represented by the formula (III). It is preferable to use 8 equivalents.
[0026]
The amount of the activator to be used varies depending on the type of the activator, but is different from the amount of the 10,11-dihydro-10-hydroxy-5H-dibenzo [b, f] azepine-5-carboxamide represented by the formula (III). On the other hand, it is usually preferable to use 1 to 5 equivalents.
[0027]
The reaction temperature varies depending on the type of the dimethyl sulfoxide activator and the solvent used, but is preferably about 20 to 40 ° C., and the reaction time is preferably about 1 to 24 hours.
[0028]
The treatment at the end of the reaction is carried out by adding water to the reaction system and then collecting the precipitate by filtration or, if necessary, extracting the precipitate with an organic solvent to obtain the 10,11-dihydro- compound represented by the formula (III). 10-Hydroxy-5H-dibenzo [b, f] azepine-5-carboxamide can be obtained. Alternatively, the reaction may be carried out by adding a 10% aqueous hydrogen peroxide solution instead of water at the time of the reaction treatment, stirring the mixture at room temperature for 1 to 6 hours, and collecting the precipitate by filtration or extracting with an organic solvent as necessary. 10,11-Dihydro-10-hydroxy-5H-dibenzo [b, f] azepine-5-carboxamide represented by the formula (III) can be obtained.
[0029]
The 10,11-dihydro-10-hydroxy-5H-dibenzo [b, f] azepine-5-carboxamide represented by the formula (III) used as a raw material or a production intermediate of the present invention is represented by the formula (II). It can be produced by hydrogenating the represented 10,11-epoxy-10,11-dihydro-5H-dibenzo [b, f] azepine-5-carboxamide in the presence of a catalyst. The 10,11-epoxy-10,11-dihydro-5H-dibenzo [b, f] azepine-5-carboxamide represented by the above formula (II) obtained by this reaction may be isolated, Can be used in the next oxidation reaction as it is by filtering off the catalyst or by simply distilling off the solvent of the filtrate from which the catalyst has been filtered off. Since the production method of the present invention does not use special microorganisms as reported so far, special production equipment and production technology are not required, and operability and production cost make it possible to implement the method on an industrial scale. It is advantageous.
[0030]
As the catalyst used for the hydrogenation, palladium-carbon, palladium-barium sulfate, palladium-calcium carbonate, and the like can be used, and among them, palladium-carbon is preferable. The amount of the hydrogenation catalyst used varies depending on the type of the catalyst used, but when 10% palladium-carbon is used, 10,11-epoxy-10,11-dihydro-5H-dibenzo represented by the above formula (II) [ b, f] It is preferably used in an amount of 1 to 5% by weight based on azepine-5-carboxamide.
[0031]
The hydrogenation reaction using a catalyst is performed by reacting 10,11-epoxy-10,11-dihydro-5H-dibenzo [b, f] azepine-5-carboxamide represented by the above formula (II) with water, dioxane, tetrahydrofuran, diethyl ether. One type or a mixture selected from ether, methanol, ethanol, ethyl acetate, and the like can be used as a solvent and hydrogenated under normal pressure or pressure to obtain a good yield. Among them, methanol is preferable. The reaction temperature varies depending on the type of hydrogenation catalyst used and the solvent, but is usually from 0 ° C. to the reflux temperature of the solvent, preferably from room temperature to 40 ° C.
[0032]
As a method of practicing the present invention more preferably, 10,11-epoxy-10,11-dihydro-5H-dibenzo [b, f] azepine-5-carboxamide represented by the above formula (II) is dissolved in methanol. Hydrogenation was performed at room temperature for 10 to 15 hours using 4% by weight of 10% palladium-carbon at normal pressure to obtain 10,11-dihydro-10-hydroxy-5H-dibenzo [b represented by the above formula (III). , F] azepine-5-carboxamide, which is then used in the presence of 3 equivalents of triethylamine or diisopropylethylamine in dimethylsulfoxide with 3 equivalents of sulfur trioxide-pyridine complex as oxidizing agent at room temperature for 0.5-2 hours. It is a method of oxidizing for a time. To the obtained reaction product, 10% aqueous hydrogen peroxide was added to the reaction mixture, and the mixture was stirred at room temperature for 1 to 6 hours. The precipitated crystals were collected by filtration, and then dried to obtain the compound of the above formula (I). )), Which can give 10,11-dihydro-10-oxo-5H-dibenzo [b, f] azepine-5-carboxamide.
[0033]
The 10,11-epoxy-10,11-dihydro-5H-dibenzo [b, f] azepine-5-carboxamide represented by the formula (II), which is a raw material of the present invention, is represented by the formula (IV). Can be obtained by treating the 5H-dibenzo [b, f] azepine-5-carboxamide under ordinary epoxidation reaction conditions, for example, oxidation using Oxone (registered trademark) in the presence of sodium bicarbonate. By doing so, a good yield can be obtained.
[0034]
BEST MODE FOR CARRYING OUT THE INVENTION
The content of the present invention will be described in more detail in the following Reference Examples and Examples, but the present invention is not limited thereto.
[0035]
【Example】
Reference Example 1
10,11-Epoxy-10,11-dihydro-5H-dibenzo [b, f] azepine-5-carboxamide 20.0 g of 5H-dibenzo [b, f] azepine-5-carboxamide and 57.0 g of sodium hydrogen carbonate in acetone 104.0 g of Oxone (registered trademark) was added to a 400 mL-water 400 mL suspension at room temperature, and the mixture was stirred at the same temperature for 11 hours. Then, a 20% aqueous sodium sulfite solution 110 mL was added at room temperature, and further stirred at the same temperature for 1 hour. did. The reaction solution was concentrated under reduced pressure to half, and the precipitated crystals were collected by filtration, washed with water, dried under reduced pressure, and then dried under reduced pressure to obtain 10,11-epoxy-10,11-dihydro-5H-dibenzo [b, f] azepine-5-. 20.3 g of carboxamide were obtained.
[0036]
NMR (CDCl 3 ) δ ppm:
4.29 (2H, s), 4.55 (2H, s), 7.55-7.30 (8H, m)
[0037]
Example 1
10,11-dihydro-10-oxo-5H-dibenzo [b, f] azepine-5-carboxamide 10,11-epoxy-10,11-dihydro-5H-dibenzo [b, f] azepine-5-carboxamide 0.412 g of 10% palladium-carbon was added to a suspension of 3 g of methanol in 100 mL, and the mixture was stirred at room temperature under a hydrogen atmosphere for 13 hours. The insoluble material is removed by filtration, the filtrate is concentrated to dryness under reduced pressure, and the residue is crystallized from ethyl acetate to give 10,11-dihydro-10-hydroxy-5H-dibenzo [b, f] azepine-5-carboxamide. 4 g were obtained. To a solution of 3.0 g of the obtained 10,11-dihydro-10-hydroxy-5H-dibenzo [b, f] azepine-5-carboxamide in 8.4 mL of dimethyl sulfoxide, 3.76 g of dimethyl sulfoxide of sulfur trioxide-pyridine complex was added. After stirring the 15 mL solution at room temperature for 30 minutes, 3.29 mL of triethylamine was added, and a solution stirred at the same temperature for 5 minutes was added dropwise at room temperature over 15 minutes. After the addition was completed, the solution was further stirred at the same temperature for 1 hour. After adding 8.5 mL of water to the reaction mixture at room temperature, 81 mL of 10% aqueous hydrogen peroxide was further added, and the mixture was stirred at the same temperature for 4 hours. The precipitate was collected by filtration, washed with water, and recrystallized from formic acid-water to obtain 1.53 g of 10,11-dihydro-10-oxo-5H-dibenzo [b, f] azepine-5-carboxamide.
[0038]
NMR (CDCl 3 ) δ ppm:
3.85 (2H, d, J = 14.0 Hz), 4.45 (2H, d, J = 14.0 Hz), 7.30-7.70 (7H, m), 8.11 (1H, d) , J = 8.0 Hz)
[0039]
Example 2
10,11-Dihydro-10-oxo-5H-dibenzo [b, f] azepine-5-carboxamide 3.0 g of 10,11-dihydro-10-hydroxy-5H-dibenzo [b, f] azepine-5-carboxamide 4.93 mL of triethylamine was added to a 27.7 mL solution of dimethyl sulfoxide with stirring at room temperature, and then 5.63 g of a sulfur trioxide-pyridine complex was gradually added. After stirring at room temperature for 1.5 hours, 60 mL of water was added. The precipitate was collected by filtration, washed with water, and recrystallized from formic acid-water to give 1.11 g of 10,11-dihydro-10-oxo-5H-dibenzo [b, f] azepine-5-carboxamide.
[0040]
NMR (CDCl 3 ) δ ppm:
3.85 (2H, d, J = 14.0 Hz), 4.45 (2H, d, J = 14.0 Hz), 7.30-7.70 (7H, m), 8.11 (1H, d) , J = 8.0 Hz)
[0041]
Example 3
10,11-Dihydro-10-oxo-5H-dibenzo [b, f] azepine-5-carboxamide 3.0 g of 10,11-dihydro-10-hydroxy-5H-dibenzo [b, f] azepine-5-carboxamide To a solution of dimethylsulfoxide (8.4 mL), 3.05 g of diisopropylethylamine was added with stirring at room temperature, and then a solution of 3.76 g of sulfur trioxide-pyridine complex in 15 mL of dimethylsulfoxide was added dropwise over 15 minutes. After further stirring at the same temperature for 1 hour, a mixture of 2.7 mL of 30% aqueous hydrogen peroxide and 87.3 mL of water was added dropwise over 22 minutes, followed by stirring at the same temperature for 4 hours. The precipitate was collected by filtration, washed with water, and recrystallized from formic acid-water to obtain 2.26 g of 10,11-dihydro-10-oxo-5H-dibenzo [b, f] azepine-5-carboxamide.
[0042]
NMR (CDCl 3 ) δ ppm:
3.85 (2H, d, J = 14.0 Hz), 4.45 (2H, d, J = 14.0 Hz), 7.30-7.70 (7H, m), 8.11 (1H, d) , J = 8.0 Hz)
【The invention's effect】
As described above, the present invention provides an industrially useful product of 10,11-dihydro-10-oxo-5H-dibenzo [b, f] azepine-5-carboxamide represented by the formula (I) which is useful as a pharmaceutical. It enables production and can be carried out in a system where the reaction can be easily controlled using reagents that are easy to handle and highly safe. is there. Moreover, since chromic acid is not used at all, a highly safe drug can be supplied.

Claims (3)


Figure 2004175761
で表される10,11−ジヒドロ−10−ヒドロキシ−5H−ジベンゾ〔b,f〕アゼピン−5−カルボキサミドをジメチルスルホキシドおよびその活性化剤を用いて酸化することを特徴とする、式
Figure 2004175761
で表される10,11−ジヒドロ−10−オキソ−5H−ジベンゾ〔b,f〕アゼピン−5−カルボキサミドの製造方法。
formula
Figure 2004175761
Oxidizing 10,11-dihydro-10-hydroxy-5H-dibenzo [b, f] azepine-5-carboxamide represented by the following formula with dimethyl sulfoxide and an activator thereof.
Figure 2004175761
A method for producing 10,11-dihydro-10-oxo-5H-dibenzo [b, f] azepine-5-carboxamide represented by the formula:

Figure 2004175761
で表される10,11−エポキシ−10,11−ジヒドロ−5H−ジベンゾ〔b,f〕アゼピン−5−カルボキサミドを触媒存在下水素添加することにより、式
Figure 2004175761
で表される10,11−ジヒドロ−10−ヒドロキシ−5H−ジベンゾ〔b,f〕アゼピン−5−カルボキサミドを製し、得られる10,11−ジヒドロ−10−ヒドロキシ−5H−ジベンゾ〔b,f〕アゼピン−5−カルボキサミドをジメチルスルホキシドおよびその活性化剤を用いて酸化することを特徴とする、式
Figure 2004175761
で表される10,11−ジヒドロ−10−オキソ−5H−ジベンゾ〔b,f〕アゼピン−5−カルボキサミドの製造方法。
formula
Figure 2004175761
By hydrogenating 10,11-epoxy-10,11-dihydro-5H-dibenzo [b, f] azepine-5-carboxamide represented by the following formula in the presence of a catalyst,
Figure 2004175761
10,11-dihydro-10-hydroxy-5H-dibenzo [b, f] azepine-5-carboxamide represented by the following formula, and the resulting 10,11-dihydro-10-hydroxy-5H-dibenzo [b, f Oxidizing azepine-5-carboxamide with dimethylsulfoxide and its activator,
Figure 2004175761
A method for producing 10,11-dihydro-10-oxo-5H-dibenzo [b, f] azepine-5-carboxamide represented by the formula:
活性化剤が、三酸化硫黄−ピリジン錯体である請求項1または2の製造方法。3. The method according to claim 1, wherein the activator is a sulfur trioxide-pyridine complex.
JP2002346547A 2002-11-28 2002-11-28 METHOD FOR PRODUCING 10,11-DIHYDRO-10-OXO-5H-DIBENZO[b,f]AZEPINE-5-CARBOXAMIDE Pending JP2004175761A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2002346547A JP2004175761A (en) 2002-11-28 2002-11-28 METHOD FOR PRODUCING 10,11-DIHYDRO-10-OXO-5H-DIBENZO[b,f]AZEPINE-5-CARBOXAMIDE

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2002346547A JP2004175761A (en) 2002-11-28 2002-11-28 METHOD FOR PRODUCING 10,11-DIHYDRO-10-OXO-5H-DIBENZO[b,f]AZEPINE-5-CARBOXAMIDE

Publications (1)

Publication Number Publication Date
JP2004175761A true JP2004175761A (en) 2004-06-24

Family

ID=32707387

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2002346547A Pending JP2004175761A (en) 2002-11-28 2002-11-28 METHOD FOR PRODUCING 10,11-DIHYDRO-10-OXO-5H-DIBENZO[b,f]AZEPINE-5-CARBOXAMIDE

Country Status (1)

Country Link
JP (1) JP2004175761A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010000196A1 (en) 2008-07-04 2010-01-07 浙江工业大学 Method for chemical synthesis of oxcarbazepine
WO2013008194A2 (en) 2011-07-13 2013-01-17 Ranbaxy Laboratories Limited Process for the preparation and purification of eslicarbazepine acetate and intermediates thereof

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010000196A1 (en) 2008-07-04 2010-01-07 浙江工业大学 Method for chemical synthesis of oxcarbazepine
CN100591672C (en) * 2008-07-04 2010-02-24 浙江工业大学 Chemical synthesis method for oxcarbazepine
WO2013008194A2 (en) 2011-07-13 2013-01-17 Ranbaxy Laboratories Limited Process for the preparation and purification of eslicarbazepine acetate and intermediates thereof
WO2013008194A3 (en) * 2011-07-13 2013-03-14 Ranbaxy Laboratories Limited Process for the preparation and purification of eslicarbazepine acetate and intermediates thereof

Similar Documents

Publication Publication Date Title
EP0863133B1 (en) Process for the preparation of 2-amino-ethanesulfonylazide acid additon salts, 2-amino-ethanesulfonylazide hydrochloride as well as its use
JPH06271519A (en) Production of 5-aminolevulinic acid
EP0147317A2 (en) Ortho-condensed pyrrole derivatives, their preparation and medicaments containing them
JP2004175761A (en) METHOD FOR PRODUCING 10,11-DIHYDRO-10-OXO-5H-DIBENZO[b,f]AZEPINE-5-CARBOXAMIDE
WO2002016371A1 (en) Penicillin crystal and process for producing the same
JP4568398B2 (en) Hexahydroisoindoline acid addition salt and method of use thereof
DE60103568T2 (en) 5-Cyano-10-hydroxy-10,11-dihydro-5H-dibenzo [b, f] azepine, process for its preparation for conversion to 5-carbamoyl-10-oxo-10,11-dihydro-5H-dibenzo [ b, f] azepine or in 5-carbamoyl-5H-dibenz [b, f] azepine
CA2523059A1 (en) Process for the preparation of 7-alkyl-10-hydroxy-20(s)-camptothecin
JP3282372B2 (en) Piperonal manufacturing method
WO2005035539A1 (en) Penicillin crystal and process for producing the same
EP0962552B1 (en) A process for the preparation of 4-(des-dimethylamino)-tetracyclines
EP0234971B1 (en) Substituted amides, their preparation and pharmaceutical compositions containing them
WO2008090078A1 (en) Method for the synthesis of rhein and derivatives thereof
JP4158044B2 (en) Penicillin crystals and production method thereof
RU2103275C1 (en) 17-halogen-4-azaandrostene derivatives and method of preparation thereof
EP0547523A1 (en) Ethanolates of 6-sulfonylsubstituted 3-hydroxychromanes and their use as inhalation means for illnesses
JP4013005B2 (en) Method for producing tetracarboxylic acid
JP4001578B2 (en) Process for producing diterbutyl cis-1-propenylphosphonate
JP4645779B2 (en) Process for producing quinoline carbaldehyde
JPH07206810A (en) Bis(carbamoylethyl) trisulfide derivative and its production
FR2519002A1 (en) NEW BICYCLIC COMPOUNDS AND PROCESS FOR PREPARING THE SAME
DE2944413A1 (en) TETRAHYDROXANTHON DERIVATIVES, METHOD FOR THE PRODUCTION AND USE THEREOF
JP3257371B2 (en) Method for producing 5-phthalimido-4-oxopentenoic acid or its pyridine salt
JPS62178560A (en) Production of 2,3-dicyano-1,4-dihydroxynaphthalene derivative
EP0634411A1 (en) Process for the preparation of 8-(4&#39;C4&#34;-(pyrimidin-2&#39;&#39;&#39;-yl)-piperazin-1&#39;&#39;-yl)-butyl)-8-aza-spiro(4,5)decan-7,9-dione and of its hydrochlorides of high purity