JPH0354939B2 - - Google Patents

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Publication number
JPH0354939B2
JPH0354939B2 JP61263630A JP26363086A JPH0354939B2 JP H0354939 B2 JPH0354939 B2 JP H0354939B2 JP 61263630 A JP61263630 A JP 61263630A JP 26363086 A JP26363086 A JP 26363086A JP H0354939 B2 JPH0354939 B2 JP H0354939B2
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formula
compound
dimethylaminoethanol
hydrochloride
mol
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JPS62108872A (en
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    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07DHETEROCYCLIC COMPOUNDS
    • C07D281/00Heterocyclic compounds containing rings of more than six members having one nitrogen atom and one sulfur atom as the only ring hetero atoms
    • C07D281/02Seven-membered rings
    • C07D281/04Seven-membered rings having the hetero atoms in positions 1 and 4
    • C07D281/08Seven-membered rings having the hetero atoms in positions 1 and 4 condensed with carbocyclic rings or ring systems
    • C07D281/10Seven-membered rings having the hetero atoms in positions 1 and 4 condensed with carbocyclic rings or ring systems condensed with one six-membered ring
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61PSPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P9/00Drugs for disorders of the cardiovascular system

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Cardiology (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Bioinformatics & Cheminformatics (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Pharmacology & Pharmacy (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Nitrogen- Or Sulfur-Containing Heterocyclic Ring Compounds With Rings Of Six Or More Members (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)

Description

【発明の詳现な説明】 本発明は、匏 の2S3S−−アセトキシ−−−
ゞメチルアミノ−゚チル−−−メトキシフ
゚ニル−−ゞヒドロ−−ベンゟチ
アれピン−5Hオンおよびその酞付加塩の新
しい補造方法に関する。その䞀般名ゞルチアれム
diltiazemによる匏の化合物はカルシり
ム拮抗掻性を有する心臓薬である。 圓業界に既知の、倚くのゞルチアれムの補造方
法においお、−アミノ−チオプノヌルおよび
トランスメチル−−メトキシプニル−オ
キシラン−−カルボキシレヌトの反応により䞀
局倚くの反応工皋においお補造された匏 の2S3S−−−アミノプニル−チオ
−−ヒドロキシ−−−メトキシプニル
−プロピオン酞たたはこれから補造された匏
 の2S3S−−ヒドロキシ−−−メト
キシプニル−−ゞヒドロ−−ベ
ンゟチアれピン−5H−オンが出発物質ずし
お甚いられる。 匏の化合物の或る補造方法によれば、䟋
えばハンガリヌ特蚱第159671号明现曞ベルギヌ
特蚱第723035号明现曞および刊行物薬孊雑誌
93、7291973およびヘルベテむカ・シミカ・ア
クタHelv.Chim.Acta67、9161984におい
お、匏の化合物のラセミ化合物をたずアル
カリ金属氎玠化物、奜たしくは氎玠化ナトリりム
で盞圓する塩に倉換し、埗られた塩をハロゲン化
−ゞメチルアミノ゚チル、奜たしくは塩化−
ゞメチル−アミノ゚チルでアルキル化し、次いで
ラセミ化合物ずしお埗られた匏 の−−ゞメチルアミノ゚チル−−ヒドロ
キシ−−−メトキシプニル−−ゞ
ヒドロ−−ベンゟチアれピン−5H−
オンを無氎酢酞でアセチル化した。䟋によれば、
アルキル化工皋の収率は、広範囲12.4〜84
内で倉わりそしおその技術的実珟化には倚く
の困難を䌎぀た。匏の化合物をアニオン圢
にし、か぀塩化物むオンを結合させるために、氎
玠化ナトリりムの等モル量が必芁である。氎玠化
ナトリりムは、その匕火性の故に鉱油40〜50
䞋に貯蔵する。埓぀お、反応混合物に鉱油の
痕跡量の存圚は避けられない。油の痕跡量は、埗
られた−−ゞメチルアミノ゚チル−−ヒ
ドロキシ−−−メトキシプニル−
−ゞヒドロ−−ベンゟチアれピン−
5H−オンを、その塩の圢で氎性盞に導入する
こずによ぀おのみ陀くこずができる。反応の他の
欠点は、アルキル化工皋においお、塩化−ゞメ
チルアミノ゚チルを甚い、この氎玠化ナトリりム
の前蚘の性質の故に無氎有機溶液に加えるこずで
ある。塩化−ゞメチルアミノ゚チル゚チルは、
「頭䞀尟」反応の途䞭で自己四玚化しやすいこ
ずが既知であり、これは倧芏暡においお困難な問
題を生じる。なぜならば、四玚化反応の生成物は
゚ヌテル溶液たたは他の䞍掻性溶媒をも぀お補造
された溶液から沈殿し、これによ぀お反応は副生
物圢成の方向に移る。前蚘のように、前蚘の匕䟋
により、匏の化合物は、90゜〜100℃におい
お無氎酢酞によ぀お匏の最終生成物に倉換
される。この工皋は䜕ら困難がないように思われ
るが、埗られる収率がわずかに80〜84であ
り、しかも過剰に甚いた反応䜓の再生に関し、酢
酞の存圚によ぀お䞀局困難になる問題から、この
工皋さえも開発された工業的に応甚できる操䜜の
必芁条件を完党に満たさないこずが分かる。 匏の化合物は、たたペヌロツパ特蚱出願
第81234号明现曞においおも出発物質ずしお甚い
られる。第工皋においお、匏の化合物
を、ピリゞン䞭で塩化アセチルず反応させた。反
応時間は長く倜、しかも匏 の−アセトキシ−−メトキシプニル−
−ゞヒドロ−−ベンゟチアれピン−
5H−オンが収率71で圢成された。次いで
望たれる最終生成物は、埌者の化合物を炭酞カリ
りムの存圚䞋にアセトン䞭で塩化−ゞメチルア
ミノ゚チル塩酞塩でアルキル化するこずによ぀お
補造された。この操䜜の欠点は、アセチル化が高
䟡な毒性溶媒であるピリゞン䞭で行われ、しかも
反応時間がやや長いこずである。さらに高吞湿性
の塩化−ゞメチルアミノ゚チル塩酞塩の䜿甚
は、反応䜓の秀量の䞍正確のような倚くの技術的
問題の原因ずなろう。 匏のプロピオン酞誘導䜓たたはピリゞ
ン、第䞉アミン、アルカリ金属たたはアルカリ土
類金属をも぀お圢成されたその塩は、公告された
日本の特願571365−81号明现曞に開瀺された方法
においお出発原料ずしお甚いられた。さらに詳し
くは、前蚘塩の䜕れかをゞメチルホルムアミド䞭
で無氎酢酞でアセチル化するこずによ぀お、匏
のアセチル誘導䜓が埗られ、このアセチル
誘導䜓を次いでクロマトグラフむヌによ぀お粟補
した。次に、匏の䞭間䜓を、氎玠化ナトリ
りムおよびシリカゲルの存圚䞋にゞメチルスルホ
キシド䞭で塩化−ゞメチルアミノ゚チルの゚ヌ
テル溶液によ぀お匏の最終生成物に収率77
で倉換された。クロマトグラフむヌ粟補に加え
お、この方法のこれ以䞊の欠点は、危険な物質
ピリゞン、ゞメチルスルホキシド、氎玠化ナト
リりムおよび溶媒混合物の䜿甚である。 本発明の目的は、2S3S−−アセトキシ
−−−ゞメチルアミノ゚チル−−
−メトキシ−プニル−−ゞヒドロ−
−ベンゟチアれピン−5H−オンおよ
びその酞付加塩、奜たしくはその塩酞塩の新しい
補造方法を提䟛するこずであり、この補造方法に
より、これらの化合物は、圓業界で既知の操䜜に
関しお述べた問題なく䞀局良収率で容易に埗られ
る材料、䞀局危険でない反応䜓を甚いお補造でき
る。 本発明者らは、匏の化合物および匏
の化合物の䞡者が単に−ゞメチルアミノ
゚タノヌルメシレヌト塩酞塩をアルキル化剀ずし
お甚いるこずによ぀お、埓来既知のアルキル化操
䜜に関する前蚘の困難なく、優れた収率でアルキ
ル化できるこずを実隓的に芋いだした。この化合
物は、その補造に぀いお圓業界においお既知の操
䜜に埓い、塩化−ゞメチルアミノ゚チル塩酞塩
よりも䞀局容易にしかも安党に容易に入手できる
−ゞメチルアミノ−゚タノヌルからメタンスル
ホン酞塩化物を甚いお、補造できるオヌガニツ
ク・シンセシヌズOrg.Synt.31 37151を
参照されたい。ゞメチルアミノ゚タノヌルメシ
レヌト塩酞塩は、圓業界に既知の方法においお補
造されるゞダヌナル・オブ・メデむシナル・ケ
ミストリヌJ.Med.Chem.、3441966、が、
しかし゚ヌテル型溶媒、䟋えばゞ゚チル゚ヌテ
ル、ゞむ゜プロピル゚ヌテルたたはテトラヒドロ
フラン䞭で補造される。なぜならば、この方法に
おいおはゞメチルアミノ゚タノヌルメシレヌト塩
酞塩が䞀局高玔床で埗られるからである。これ以
䞊の利点は、このゞメチルアミノ゚タノヌルメシ
レヌト塩酞塩が、吞湿性でなく、埓぀おその貯蔵
および取り扱いが、圓業界に既知のアルキル化剀
の堎合よりも䞀局容易なこずである。 さらに、本発明者らは、埓来既知のアセチル化
反応に関する欠点は、酞觊媒の存圚䞋に酢酞む゜
プロペニルをアセチル化剀ずしお甚いるこずによ
぀お回避できるこずを芋いだした。この反応䜓を
甚いるこずによ぀お、盞圓するアセチル誘導䜓
は、匏の化合物および匏の化合物の
䞡者から非垞に短時間に事実䞊定量的に補造でき
る。 埓぀お、本発明は、䞋蚘アルキル化を−ゞメ
チルアミノ゚タノヌルメシレヌト塩酞塩で行いお
よびたたは䞋蚘アセチル化を酢酞む゜プロペ
ニルで行うこずを特城ずする、 任意の順序で、匏 の2S3S−−ヒドロキシ−−−メ
トキシプニル−−ゞヒドロ−
−ベンゟチアれピン−5H−オンをアルキ
ル化およびアセチル化し、あるいは  匏 の−アセトキシ−−−メトキシ−プ
ニル−−ゞヒドロ−−ベンゟチ
アれピン−5H−オンをアルキル化し、そ
しお 所望ならば、埗られた匏の化合物をそ
の酞付加塩に倉換するこずによる、匏 の2S3S−−アセトキシ−−
−ゞメチルアミノ゚チル−−−メトキシ
プニル−−ゞヒドロ−−ベン
ゟチアれピン−5H−オンおよびその酞付
加塩の新しい補造方法に関する。 本発明の方法の奜たしい態様によれば、匏
の化合物は、匏の化合物から出発し
お補造され、そしおアルキル化工皋においお、
−ゞメチルアミノ゚タノヌルメシレヌト塩酞塩を
アルキル化剀ずしお甚いるが、䞀方ではアセチル
化は酞觊媒の存圚䞋に酢酞む゜プロペニルで行わ
れる。 第工皋におけるこの操䜜の倉圢によれば、ア
ルキル化は、前蚘の反応䜓をも぀お行われ、その
埌埗られた化合物を酢酞む゜プロペニルでアセチ
ル化するか、あるいは酞觊媒の存圚䞋に匏
の化合物をたず酢酞む゜プロペニルでアセチル化
し、次いで埗られた化合物をさらに−ゞメチル
アミノ゚タノヌルメシレヌト塩酞塩ず反応させ
る。酞觊媒ずしお、䟋えばスルホン酞、奜たしく
はメタンスルホン酞たたは−トル゚ン−スルホ
ン酞を䜿甚できる。 本発明は、簡単な反応条件䞋に反応䞭に圢成さ
れたアセトンの連続脱離なく迅速に奜収率で−
アセチル化が、酢酞む゜プロペニル、すなわちア
セトンの゚ノヌルアセテヌトを甚いお実斜できる
ずいう発芋に基づいおいる。さらに、−ゞ
メチルアミノ゚チル基は、補造が容易でしかも䜕
ら䞍快な性質のない−ゞメチルアミノ゚タノヌ
ルメシレヌト塩酞塩によ぀お容易に圢成できるこ
ずが分か぀た。反応の収率は高い。 反応の特に奜たしい態様によれば、アセトン
䞭、炭酞カリりムの存圚䞋、還流䞋に匏の
化合物モルが−ゞメチル−アミノ゚タノヌル
メシレヌト塩酞塩1.2モル〜モルでアルキル化
される。その埌、無機物質およびアセトンを陀
き、そしおメタンスルホン酞たたは−トル゚ン
−スルホン酞の存圚䞋に、奜たしくは埌者の化合
物をモル圓量で甚いお、塩玠化炭化氎玠、奜た
しくはゞクロロ゚タンで補造された溶液䞭で埗ら
れた匏の化合物を、酢酞む゜プロペニル
モル〜3.2モルで、アセチル化する。生成物を、
その塩酞塩ずしお単離する。 本発明による方法の他の特に奜たしい態様によ
れば、䞍掻性溶媒䞭で、−トル゚ン−スルホン
酞たたはメタン−スルホン酞モル圓量未満の存
圚䞋に匏の化合物モルを酢酞む゜プロペ
ニルモル〜2.2モルでアセチル化する。溶媒を
陀き、次いで埗られた生成物を濃氎酞化アンモニ
りムで凊理する。埗られた匏の化合物を次
に前蚘のようにしお−ゞメチルアミノ゚タノヌ
ルメシレヌト塩酞塩1.2モル〜モルでアルキル
化する。生成物を、その塩酞塩の圢で単離する。 本発明による方法の最も重芁な利点は、䞋蚘の
ずおりである −特別の装眮を芁しない。 −最終生成物は簡単な技術および容易に入手でき
る反応䜓を甚いお、良奜な収率ずずもに高玔床
で埗られる。 −䞭間䜓を反応䞭に単離する必芁がない。 −反応を実斜する堎合、䞍快な性質を有する危険
な反応䜓たたは溶媒を䜿甚しない。 本発明による方法のこれ以䞊の詳现は、䞋蚘の
非限定䟋によ぀お具䜓的に説明される。 䟋  2S3S−−ヒドロキシ−−−メト
キシプニル−−ゞヒドロ−−ベ
ンゟチアれピン−5H−オン1.50.005モ
ルを50cm3䞞底フラスコに秀取し、次いでゞオキ
サン15cm3に溶解し、その埌−トル゚ン−スルホ
ン酞0.15および酢酞む゜プロペニル1.11.2
cm3、0.011モルを溶液に加える。反応混合物を、
攪拌しながら、時間還流し、真空䞭で蒞発し、
次いで残留物を濃氎酞化アンモニりム氎溶液cm3
で粉砕する。埗られた2S3S−−アセトキ
シ−−−メトキシプニル−−ゞヒ
ドロ−−ベンゟチアれピン−5H−オ
ンをろ別し、䞭性たで氎掗し、次いで也燥する。 収量1.7199 融点150℃〜152℃ 䟋  2S3S−−アセトキシ−−−メト
キシプニル−−ゞヒドロ−−ベ
ンゟチアれピン−5H−オン1.700.005モ
ルをアセトン50cm3に溶解し、そしお−ゞメチ
ルアミノ゚タノヌルメシレヌト塩酞塩1.52
0.0075モルおよび炭酞カリりム2.080.015
モルを溶液に加える。埗られた懞濁液を攪拌し
ながら12時間還流する。冷华の際に反応混合物か
ら分離した䞍溶性塩をろ別し、次いでろ液を蒞発
する。残留物をクロロホルム20cm3に溶解し、そし
お゚タノヌル䞭の塩酞の蚈算量を溶液に加える。
溶液を真空䞭で蒞発し、そしお残留物をむ゜プロ
パノヌル15cm3から結晶化する。結晶ゞルチアれム
塩酞塩をろ別し、次いで也燥する。 収量1.879.92 融点206℃〜207℃ 䟋  2S3S−−ヒドロキシ−−−メト
キシプニル−−ゞヒドロ−−ベ
ンゟチアれピン−5H−オン4.50.015モ
ルをアセトン80cm3に溶解し、そしお−ゞメチ
ルアミノ゚タノヌルメシレヌト塩酞塩4.58
0.0225モルおよび炭酞カリりム6.250.045
モルを溶液に加える。懞濁液を攪拌しながら12
時間還流し、宀枩に冷华し、そしお䞍溶性物質を
ろ別する。ろ液を蒞発し、残留物をクロロホルム
25cm3に溶解し、そしお溶液を゚タノヌル䞭塩酞溶
液の蚈算量で酞性にする。蒞発埌、残留物をむ゜
プロパノヌル20cm3から結晶化しお、結晶圢の
2S3S−−−ゞメチルアミノ゚チル−
−ヒドロキシ−−−メトキシプニル−
−ゞヒドロ−−ベンゟチアれピン−
5H−オン塩酞塩を生じる。その埌、結晶を
ろ過し、次いで也燥する。 収量5.2585.68 融点225℃〜227℃ α20 D176.5゜0.7クロロホルム 䟋  2S3S−−−ゞメチル−アミノ゚チ
ル−−ヒドロキシ−−−メトキシプニ
ル−−ゞヒドロ−−ベンゟチアれ
ピン−5H−オン塩酞塩4.080.01モルを
クロロホルム60cm3に溶解し、その埌酢酞む゜プロ
ペニル3.03.3cm3、0.3モルおよびメタンスル
ホン酞2.881.97cm3、0.03モルを溶液に加え
る。次にこの溶液を45分還流し、宀枩に冷华し、
そしお1n氎酞化ナトリりム氎溶液31cm3で抜出す
る。有機盞を也燥し、゚タノヌル䞭塩酞溶液の蚈
算量を加え、そしお混合物を蒞発する。残留物を
む゜プロパノヌル20cm3から結晶化する。沈殿した
ゞルチアれム塩酞塩結晶をろ過し、そしお也燥す
る。 収量4.088.8 融点206℃〜207℃ α20 D96゜0.5、メタノヌル 䟋  2S3S−−ヒドロキシ−−−メト
キシプニル−−ゞヒドロ−−ベ
ンゟチアれピン−5H−オン3.00.01モル
をアセトン80cm3に溶解し、その埌、−ゞメチル
アミノ゚タノヌルメシレヌト塩酞塩3.05
0.015モルおよび炭酞カリりム4.170.03モ
ルを溶液に加える。埗られた懞濁液を攪拌しな
がら12時間還流する。冷华埌、䞍溶性物質をろ別
し、次にろ液を真空䞭で蒞発する。残留油をゞク
ロロ゚タン30cm3に溶解し、そしお酢酞む゜プロペ
ニル2.22.42cm3、0.022モルおよびメタンス
ルホン酞2.111.42cm3、0.022モルを溶液に加
える。溶液を45分沞隰させ、冷华し、そしお1n
氎酞化ナトリりム氎溶液22cm3で抜出する。有機盞
を也燥し、蒞発させ、そしお残留物をむ゜プロパ
ノヌル20cm3から結晶化する。沈殿したゞルチアれ
ム塩酞塩結晶をろ過し、次いで也燥する。 収量3.2171.3 融点210℃〜211℃ α20 D95.81゜0.4、メタノヌル 䟋  −ゞメチルアミノ゚タノヌルメシレヌト塩酞
塩の補造 −ゞメチルアミノ゚タノヌル8.910.2cm3、
0.1モルをゞむ゜プロピル゚ヌテル100cm3に溶解
し、その埌攪拌しながら、枩床℃〜℃におい
おメタンスルホン酞塩化物12.68cm3、0.11
モルを溶液に滎加する。さらに10分攪拌埌、生
成物をろ別する。湿最物質を゚タノヌル25cm3から
再結晶化し、そしお宀枩においお也燥する。 収量14.572.74 融点126℃〜127℃
DETAILED DESCRIPTION OF THE INVENTION The present invention is based on the formula () (2S,3S)-3-acetoxy-5-(N,N-
The present invention relates to a new method for producing dimethylamino-ethyl)-2-(4-methoxyphenyl)-2,3-dihydro-1,5-benzothiazepin-4(5H)one and its acid addition salt. The compound of formula () by its generic name diltiazem is a cardiac drug with calcium antagonist activity. In many methods of producing diltiazem known in the art, it is produced in more reaction steps by the reaction of 2-amino-thiophenol and transmethyl 3-(4-methoxyphenyl)-oxirane-2-carboxylate. expression () (2S,3S)-3-(2-aminophenyl-thio)
-2-hydroxy-3-(4-methoxyphenyl)
-propionic acid or the formula prepared from it () (2S,3S)-3-hydroxy-2-(4-methoxyphenyl)-2,3-dihydro-1,5-benzothiazepin-4(5H)-one is used as starting material. According to certain methods of preparing compounds of formula (), for example Hungarian Patent No. 159671 (Belgium Patent No. 723035) and the publication Pharmaceutical Journal
93, 729 (1973) and Helv. Chim. Acta 67 , 916 (1984), the racemate of the compound of formula () is first treated with an alkali metal hydride, preferably sodium hydride. The resulting salt is converted into a 2-dimethylaminoethyl halide, preferably 2-dimethylaminoethyl chloride.
Alkylated with dimethyl-aminoethyl and then obtained as a racemic compound of formula () 5-(2-dimethylaminoethyl)-3-hydroxy-2-(4-methoxyphenyl)-2,3-dihydro-1,5-benzothiazepine-4(5H)-
ion was acetylated with acetic anhydride. According to the example,
The yield of the alkylation step varies over a wide range (12.4% to 84%
%) and its technical realization was accompanied by many difficulties. Equimolar amounts of sodium hydride are required to bring the compound of formula () into the anionic form and to bind the chloride ion. Because of its flammability, sodium hydride can be mixed with mineral oil (40% to 50%
%) stored under. The presence of traces of mineral oil in the reaction mixture is therefore unavoidable. Traces of oil are present in the resulting 5-(2-dimethylaminoethyl)-3-hydroxy-2-(4-methoxyphenyl)-2,3
-dihydro-1,5-benzothiazepine-4
The (5H)-one can only be removed by introducing it into the aqueous phase in the form of its salt. Another disadvantage of the reaction is the use of 2-dimethylaminoethyl chloride in the alkylation step, which is added to an anhydrous organic solution due to the aforementioned properties of sodium hydride. 2-dimethylaminoethylethyl chloride is
They are known to be prone to self-quaternization (during "head-to-tail" reactions), which poses a difficult problem on a large scale. This is because the products of the quaternization reaction precipitate from solutions prepared with ether solutions or other inert solvents, thereby shifting the reaction towards by-product formation. As mentioned above and according to the above reference, the compound of formula () is converted to the final product of formula () with acetic anhydride at 90° to 100°C. Although this process appears to be without any difficulties, the yields obtained are only 80%-84%, and problems with regeneration of reactants used in excess are made more difficult by the presence of acetic acid. It can be seen from this that even this process does not fully meet the requirements of the developed industrially applicable operation. Compounds of formula () are also used as starting materials in European Patent Application No. 81234. In the first step, a compound of formula () was reacted with acetyl chloride in pyridine. The reaction time is long (one night), and the formula () 3-acetoxy-2(4-methoxyphenyl)-
2,3-dihydro-1,5-benzothiazepine-
4(5H)-one was formed in 71% yield. The desired final product was then prepared by alkylation of the latter compound with 2-dimethylaminoethyl chloride hydrochloride in acetone in the presence of potassium carbonate. The disadvantage of this procedure is that the acetylation is carried out in pyridine, an expensive and toxic solvent, and the reaction time is rather long. Furthermore, the use of highly hygroscopic 2-dimethylaminoethyl chloride hydrochloride would cause many technical problems, such as inaccuracies in the weighing of reactants. Propionic acid derivatives of formula () or their salts formed with pyridine, tertiary amines, alkali metals or alkaline earth metals can be prepared in the process disclosed in published Japanese Patent Application No. 571,365-81. It was used as a starting material. More specifically, acetylation of any of the above salts with acetic anhydride in dimethylformamide gave an acetyl derivative of formula (), which was then purified by chromatography. The intermediate of formula () is then converted to the final product of formula () by an ethereal solution of 2-dimethylaminoethyl chloride in dimethyl sulfoxide in the presence of sodium hydride and silica gel in a yield of 77.
Converted in %. In addition to the chromatographic purification, further disadvantages of this method are the use of hazardous substances (pyridine, dimethyl sulfoxide, sodium hydride) and solvent mixtures. The object of the present invention is (2S,3S)-3-acetoxy-5-(N,N-dimethylaminoethyl)-2-
(4-methoxy-phenyl)-2,3-dihydro-
The object of the present invention is to provide a new method for the preparation of 1,5-benzothiazepin-4(5H)-one and its acid addition salts, preferably its hydrochloride, by which these compounds can be prepared using easily obtainable materials, less hazardous reactants, and in better yields without the problems mentioned with respect to the operation. The inventors have determined that both the compound of formula () and the compound of formula () can be prepared by simply using 2-dimethylaminoethanol mesylate hydrochloride as the alkylating agent, as described above with respect to previously known alkylation operations. It has been experimentally found that the alkylation can be carried out without difficulty and in excellent yields. This compound was prepared using methanesulfonic acid chloride from 2-dimethylamino-ethanol, which is more readily and safely available than 2-dimethylaminoethyl chloride hydrochloride, following procedures known in the art for its preparation. , can be manufactured [see Organic Synthesis [Org. Synt.] 31 37 (151)]. Dimethylaminoethanol mesylate hydrochloride is prepared by methods known in the art [J.Med.Chem. 9 , 344 (1966)], but by
However, they are prepared in ethereal solvents, such as diethyl ether, diisopropyl ether or tetrahydrofuran. This is because dimethylaminoethanol mesylate hydrochloride can be obtained with higher purity in this method. A further advantage is that this dimethylaminoethanol mesylate hydrochloride is not hygroscopic and therefore its storage and handling is easier than with alkylating agents known in the art. Furthermore, the inventors have found that the drawbacks associated with previously known acetylation reactions can be avoided by using isopropenyl acetate as the acetylating agent in the presence of an acid catalyst. By using this reactant, the corresponding acetyl derivatives can be prepared virtually quantitatively in a very short time from both compounds of formula () and compounds of formula (). The invention is therefore characterized in that the following alkylation is carried out with 2-dimethylaminoethanol mesylate hydrochloride and/or the following acetylation is carried out with isopropenyl acetate: a) In any order, the formula ( ) (2S,3S)-3-hydroxy-2-(4-methoxyphenyl)-2,3-dihydro-1,5
-benzothiazepine-4(5H)-one is alkylated and acetylated, or b) formula () of 3-acetoxy-2-(4-methoxy-phenyl)-2,3-dihydro-1,5-benzothiazepin-4(5H)-one and, if desired, the resulting formula () By converting the compound of formula () into its acid addition salt (2S,3S)-3-acetoxy-5-(N,N
-Dimethylaminoethyl)-2-(4-methoxyphenyl)-2,3-dihydro-1,5-benzothiazepin-4(5H)-one and its acid addition salt. According to a preferred embodiment of the process of the invention, a compound of formula () is prepared starting from a compound of formula () and in the alkylation step 2
-Dimethylaminoethanol mesylate hydrochloride is used as alkylating agent, while acetylation is carried out with isopropenyl acetate in the presence of an acid catalyst. According to a variant of this procedure in the first step, the alkylation is carried out with the abovementioned reactants and the compound obtained is then acetylated with isopropenyl acetate or in the presence of an acid catalyst of the formula ( )
The compound is first acetylated with isopropenyl acetate and then the resulting compound is further reacted with 2-dimethylaminoethanol mesylate hydrochloride. As acid catalyst it is possible to use, for example, sulfonic acids, preferably methanesulfonic acid or p-toluene-sulfonic acid. The present invention enables O-
It is based on the discovery that acetylation can be carried out using isopropenyl acetate, the enol acetate of acetone. Furthermore, it has been found that the N,N-dimethylaminoethyl group can be easily formed with 2-dimethylaminoethanol mesylate hydrochloride, which is easy to prepare and has no unpleasant properties. The yield of the reaction is high. According to a particularly preferred embodiment of the reaction, 1 mol of a compound of formula () is alkylated with 1.2 mol to 2 mol of 2-dimethyl-aminoethanol mesylate hydrochloride in acetone in the presence of potassium carbonate under reflux. Thereafter, the inorganic substances and acetone are removed and a chlorinated hydrocarbon, preferably dichloroethane, is prepared in the presence of methanesulfonic acid or p-toluene-sulfonic acid, preferably using 1 molar equivalent of the latter compound. The compound of formula () obtained in solution was added to isopropenyl acetate 2
mol ~ 3.2 mol, acetylates. the product,
It is isolated as its hydrochloride salt. According to another particularly preferred embodiment of the process according to the invention, 1 mole of a compound of formula Acetylation occurs between 2 mol and 2.2 mol. The solvent is removed and the product obtained is then treated with concentrated ammonium hydroxide. The resulting compound of formula () is then alkylated with 1.2 to 2 moles of 2-dimethylaminoethanol mesylate hydrochloride as described above. The product is isolated in its hydrochloride form. The most important advantages of the method according to the invention are: - No special equipment is required. - The final product is obtained in high purity with good yield using simple techniques and readily available reactants. - There is no need to isolate intermediates during the reaction. - When carrying out the reaction, no hazardous reactants or solvents with unpleasant properties are used. Further details of the method according to the invention are illustrated by the following non-limiting examples. Example 1 1.5 g (0.005 mol) of (2S,3S)-3-hydroxy-2-(4-methoxyphenyl)-2,3-dihydro-1,5-benzothiazepine-4(5H)-one was added to a 50 cm 3 weighed into a round bottom flask and then dissolved in 15 cm 3 of dioxane, followed by 0.15 g of p-toluene-sulfonic acid and 1.1 g of isopropenyl acetate (1.2
cm 3 , 0.011 mol) is added to the solution. The reaction mixture is
While stirring, reflux for 1 hour, evaporate in vacuo,
The residue was then diluted with 5 cm 3 of concentrated ammonium hydroxide aqueous solution.
Grind with. The obtained (2S,3S)-3-acetoxy-2-(4-methoxyphenyl)-2,3-dihydro-1,5-benzothiazepin-4(5H)-one was filtered off and neutralized. Wash with water and then dry. Yield: 1.71g (99%) Melting point: 150℃~152℃ Example 2 (2S,3S)-3-acetoxy-2-(4-methoxyphenyl)-2,3-dihydro-1,5-benzothiazepine -4(5H)-one 1.70 g (0.005 mol) was dissolved in 50 cm 3 of acetone and 1.52 g of 2-dimethylaminoethanol mesylate hydrochloride
(0.0075 mol) and potassium carbonate 2.08 g (0.015 mol)
mol) to the solution. The resulting suspension is refluxed for 12 hours with stirring. The insoluble salts which separated out from the reaction mixture on cooling are filtered off and the filtrate is then evaporated. Dissolve the residue in 20 cm 3 of chloroform and add the calculated amount of hydrochloric acid in ethanol to the solution.
The solution is evaporated in vacuo and the residue is crystallized from 15 cm 3 of isopropanol. The crystalline diltiazem hydrochloride is filtered off and then dried. Yield: 1.8g (79.92%) Melting point: 206℃~207℃ Example 3 (2S,3S)-3-hydroxy-2-(4-methoxyphenyl)-2,3-dihydro-1,5-benzothiazepine 4.5 g (0.015 mol) of -4(5H)-one were dissolved in 80 cm 3 of acetone and 4.58 g of 2-dimethylaminoethanol mesylate hydrochloride
(0.0225 mol) and potassium carbonate 6.25 g (0.045
mol) to the solution. 12 while stirring the suspension
Reflux for an hour, cool to room temperature and filter off the insoluble material. Evaporate the filtrate and chloroform the residue.
Dissolve in 25 cm 3 and acidify the solution with the calculated amount of hydrochloric acid solution in ethanol. After evaporation, the residue was crystallized from 20 cm 3 of isopropanol to give the crystalline form (2S,3S)-5-(2-dimethylaminoethyl)-
3-hydroxy-2-(4-methoxyphenyl)-
2,3-dihydro-1,5-benzothiazepine-
4(5H)-one hydrochloride is produced. The crystals are then filtered and then dried. Yield: 5.25g (85.68%) Melting point: 225°C to 227°C [α] 20 D = +176.5° (c = 0.7; chloroform) Example 4 (2S,3S)-5-(2-dimethyl-aminoethyl) 4.08 g (0.01 mol) of -3-hydroxy-2-(4-methoxyphenyl)-2,3-dihydro-1,5-benzothiazepine-4(5H)-one hydrochloride was dissolved in 60 cm 3 of chloroform. , then 3.0 g (3.3 cm 3 , 0.3 mol) of isopropenyl acetate and 2.88 g (1.97 cm 3 , 0.03 mol) of methanesulfonic acid are added to the solution. The solution was then refluxed for 45 minutes, cooled to room temperature,
Then, extract with 31 cm 3 of 1N aqueous sodium hydroxide solution. Dry the organic phase, add the calculated amount of hydrochloric acid solution in ethanol and evaporate the mixture. The residue is crystallized from 20 cm 3 of isopropanol. The precipitated diltiazem hydrochloride crystals are filtered and dried. Yield: 4.0g (88.8%) Melting point: 206°C to 207°C [α] 20 D = +96° (c = 0.5, methanol) Example 5 (2S,3S)-3-hydroxy-2-(4-methoxyphenyl )-2,3-dihydro-1,5-benzothiazepine-4(5H)-one 3.0 g (0.01 mol)
was dissolved in 80 cm 3 of acetone, then 3.05 g of 2-dimethylaminoethanol mesylate hydrochloride
(0.015 mol) and 4.17 g (0.03 mol) of potassium carbonate are added to the solution. The resulting suspension is refluxed for 12 hours with stirring. After cooling, the insoluble material is filtered off and the filtrate is then evaporated in vacuo. The residual oil is dissolved in 30 cm 3 of dichloroethane and 2.2 g (2.42 cm 3 , 0.022 mol) of isopropenyl acetate and 2.11 g (1.42 cm 3 , 0.022 mol) of methanesulfonic acid are added to the solution. Boil the solution for 45 minutes, cool, and add 1n
Extract with 22 cm 3 of aqueous sodium hydroxide solution. The organic phase is dried, evaporated and the residue is crystallized from 20 cm 3 of isopropanol. The precipitated diltiazem hydrochloride crystals are filtered and then dried. Yield: 3.21g (71.3%) Melting point: 210°C to 211°C [α] 20 D = +95.81° (c = 0.4, methanol) Example 6 Production of 2-dimethylaminoethanol mesylate hydrochloride 2-dimethylaminoethanol 8.9g ( 10.2cm3 ,
0.1 mol) in 100 cm 3 of diisopropyl ether and then, with stirring, 12.68 g (8 cm 3 , 0.11 mol) of methanesulfonic acid chloride at a temperature of 0°C to 5°C.
mol) dropwise into the solution. After stirring for a further 10 minutes, the product is filtered off. The wet material is recrystallized from 25 cm 3 of ethanol and dried at room temperature. Yield: 14.5g (72.74%) Melting point: 126℃~127℃

Claims (1)

【特蚱請求の範囲】  䞋蚘アルキル化を−ゞメチルアミノ−゚タ
ノヌルメシレヌト塩酞塩で行い、およびたた
は䞋蚘アセチル化を酢酞む゜プロペニルで行う
こずを特城ずする、  任意の順序で匏 の2S3S−−ヒドロキシ−−−メ
トキシプニル−−ゞヒドロ−
−ベンゟ−チアれピン−5H−オンをアル
キル化およびアセチル化し、あるいは  匏 の−アセトキシ−−−メトキシ−プ
ニル−−ゞヒドロ−−ベンゟチ
アれピン−5H−オンをアルキル化し、 そしお所望ならば埗られた匏の化合物
をその酞付加塩に倉換するこずによる、匏
 の2S3S−−アセトキシ−−
−ゞメチルアミノ゚チル−−−メトキシ
−プニル−−ゞヒドロ−−ベ
ンゟチアれピン−5H−オンおよびその酞
付加塩の補造方法。  匏の化合物を−ゞメチルアミノ゚タ
ノヌルメシレヌト塩酞塩でアルキル化し、そしお
埗られた匏 の化合物をアセチル化剀ず反応させるこずを特城
ずする、特蚱請求の範囲第項に蚘茉の方法。  匏の化合物を−ゞメチルアミノ゚タ
ノヌルの反応性誘導䜓でアルキル化し、そしお酞
觊媒の存圚䞋に、埗られた匏の化合物を酢
酞む゜プロペニルでアセチル化するこずを特城ず
する、特蚱請求の範囲第項に蚘茉の方法。  匏の化合物をアセチル化剀ず反応さ
せ、そしお埗られた匏の化合物を−ゞメ
チルアミノ゚タノヌルメシレヌト塩酞塩でアルキ
ル化するこずを特城ずする、特蚱請求の範囲第
項に蚘茉の方法。  酞觊媒の存圚䞋に匏の化合物を酢酞む
゜プロペニルでアセチル化し、次いで埗られた匏
の化合物を−ゞメチルアミノ−゚タノヌ
ルの反応性誘導䜓でアルキル化するこずを特城ず
する、特蚱請求の範囲第項に蚘茉の方法。  匏の化合物を−ゞメチルアミノ゚タ
ノヌルメシレヌト塩酞塩でアルキル化しそしお酞
觊媒の存圚䞋に埗られた匏の化合物を酢酞
む゜プロペニルでアセチル化するこずを特城ずす
る、特蚱請求の範囲第項に蚘茉の方法。  酞觊媒の存圚䞋に、匏の化合物を酢酞
む゜プロペニルでアセチル化し、次いで埗られた
匏の化合物を−ゞメチルアミノ゚タノヌ
ルメシレヌト塩酞塩でアルキル化するこずを特城
ずする、特蚱請求の範囲第項に蚘茉の方法。  匏の化合物モルを−ゞメチルアミ
ノ゚タノヌルメシレヌト塩酞塩1.2モル〜モル
でアルキル化し、そしお酞觊媒、奜たしくはメタ
ン−スルホン酞たたは−トル゚ン−スルホン酞
の存圚䞋に、埗られた匏の化合物を酢酞む
゜プロペニルモル〜3.2モルでアセチル化する
こずを特城ずする、特蚱請求の範囲第項たたは
第項に蚘茉の方法。  酞觊媒、奜たしくはメタン−スルホン酞たた
は−トル゚ン−スルホン酞の存圚䞋に匏
の化合物モルを酢酞む゜プロペニルモル〜
2.2モルでアセチル化し、次いで埗られた匏
の化合物を−ゞメチルアミノ−゚タノヌルメシ
レヌト塩酞塩1.2モル〜モルでアルキル化する
こずを特城ずする、特蚱請求の範囲第項たたは
第項に蚘茉の方法。
[Scope of Claims] 1. characterized in that the following alkylation is carried out with 2-dimethylamino-ethanol mesylate hydrochloride and/or the following acetylation is carried out with isopropenyl acetate, a) in any order of the formula () (2S,3S)-3-hydroxy-2-(4-methoxyphenyl)-2,3-dihydro-1,5
-benzo-thiazepin-4(5H)-one is alkylated and acetylated, or b) formula () of 3-acetoxy-2-(4-methoxy-phenyl)-2,3-dihydro-1,5-benzothiazepin-4(5H)-one and, if desired, the resulting formula () By converting the compound into its acid addition salt, the formula () (2S,3S)-3-acetoxy-5-(N,N
A method for producing -dimethylaminoethyl)-2-(4-methoxy-phenyl)-2,3-dihydro-1,5-benzothiazepin-4(5H)-one and its acid addition salt. 2 A compound of formula () is alkylated with 2-dimethylaminoethanol mesylate hydrochloride, and the resulting formula () 2. A method according to claim 1, characterized in that the compound is reacted with an acetylating agent. 3. Alkylating a compound of formula () with a reactive derivative of 2-dimethylaminoethanol and acetylating the resulting compound of formula () with isopropenyl acetate in the presence of an acid catalyst, A method according to claim 1. 4. Claim 1, characterized in that the compound of formula () is reacted with an acetylating agent and the resulting compound of formula () is alkylated with 2-dimethylaminoethanol mesylate hydrochloride.
The method described in section. 5. Acetylation of a compound of formula () with isopropenyl acetate in the presence of an acid catalyst, and then alkylation of the resulting compound of formula () with a reactive derivative of 2-dimethylamino-ethanol, A method according to claim 1. 6. Claims characterized in that the compound of formula () is alkylated with 2-dimethylaminoethanol mesylate hydrochloride and the compound of formula () obtained in the presence of an acid catalyst is acetylated with isopropenyl acetate. The method described in item 1 of the scope. 7. Acetylating a compound of formula () with isopropenyl acetate in the presence of an acid catalyst, and then alkylating the resulting compound of formula () with 2-dimethylaminoethanol mesylate hydrochloride, A method according to claim 7. 8 1 mole of the compound of formula () is alkylated with 1.2 to 2 moles of 2-dimethylaminoethanol mesylate hydrochloride and in the presence of an acid catalyst, preferably methane-sulfonic acid or p-toluene-sulfonic acid, the obtained 7. The method according to claim 1, wherein the compound of formula () is acetylated with 2 to 3.2 mol of isopropenyl acetate. 9 In the presence of an acid catalyst, preferably methane-sulfonic acid or p-toluene-sulfonic acid, the formula ()
1 mole of the compound is converted into 2 moles of isopropenyl acetate ~
Acetylated with 2.2 mol and then the resulting formula ()
6. Process according to claim 1, characterized in that the compound of 2-dimethylamino-ethanol mesylate hydrochloride is alkylated with 1.2 to 2 mol of 2-dimethylamino-ethanol mesylate hydrochloride.
JP61263630A 1985-11-06 1986-11-05 Production of dilutiazem Granted JPS62108872A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
HU854264A HU195795B (en) 1985-11-06 1985-11-06 Process for preparing (2s,3s)-3-acetoxy-5-(n,n-dimethyl-amino-ethyl)-2-(h-methoxy-phenyl)-2,3-dihydro-1,5-benzothiazepin-h(5h)-one
HU2251-4264/85 1985-11-06

Publications (2)

Publication Number Publication Date
JPS62108872A JPS62108872A (en) 1987-05-20
JPH0354939B2 true JPH0354939B2 (en) 1991-08-21

Family

ID=10967486

Family Applications (1)

Application Number Title Priority Date Filing Date
JP61263630A Granted JPS62108872A (en) 1985-11-06 1986-11-05 Production of dilutiazem

Country Status (6)

Country Link
JP (1) JPS62108872A (en)
AT (1) AT393837B (en)
BE (1) BE905704A (en)
CA (1) CA1309714C (en)
ES (1) ES2001146A6 (en)
HU (1) HU195795B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6450872A (en) * 1987-08-21 1989-02-27 Tanabe Seiyaku Co Production of 1,5-benzothiazepine derivative
IT1226301B (en) * 1988-07-26 1990-12-27 Zambon Spa PROCESS FOR THE PREPARATION OF INTERMEDIATES FOR THE SYNTHESIS OF DILTIAZEM.

Also Published As

Publication number Publication date
JPS62108872A (en) 1987-05-20
AT393837B (en) 1991-12-27
HUT42767A (en) 1987-08-28
ATA294786A (en) 1991-06-15
BE905704A (en) 1987-03-02
CA1309714C (en) 1992-11-03
ES2001146A6 (en) 1988-04-16
HU195795B (en) 1988-07-28

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