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EP0126030A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Process for the preparation of beta-(benzothiazolylthio) and beta-(benzimidazolylthio) carboxylic acids

Assignee: Novartis AG
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Filing: 1984-05-08
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Granted: —
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Expires: 2004-05-08
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Abstract

Abstract Translated from German Die Reaktion von 2-Mercapto-benzthiazol oder -benzimidazol mit a,ß-ungesättigten Carbonsäuren in stark saurem Reaktionsmedium liefert Verbindungen der Formel worin X Schwefel oder NH ist, jedes R unabhängig voneinander H, Alkyl, Halogenalkyl, alkoxy, Alkylthio, Alkylsulfonyl, Phenyl, Alkylphenyl, Phenylalkyl, Cycloalkyl, Halogen, NO 2 , CN, COOH, COOAlkyl, OH oder eine Amino- oder Carbamoylgruppe bedeutet und R', R 2 und R 3 unabhängig voneinander H, Alkyl, Halogenalkyl, Hydroxyalkyl, Alkoxyalkyl, Carboxyalkyl, Carboxyl, unsubstituiertes oder substituiertes Aryl oder Aralkyl bedeuten oder R' und R 2 zusammen unverzweigtes oder verzweigtes Alkylen bedeuten, das durch 1 oder 2 Carboxylgruppen substituiert sein kann. The reaction of 2-mercapto-benzthiazole or -benzimidazole with a, ß-unsaturated carboxylic acids in a strongly acidic reaction medium gives compounds of the formula wherein X is sulfur or NH, each R is independently H, alkyl, haloalkyl, alkoxy, alkylthio, alkylsulfonyl, phenyl, alkylphenyl, phenylalkyl, cycloalkyl, halogen, NO 2 , CN, COOH, COOalkyl, OH or an amino or carbamoyl group and R ', R 2 and R 3 independently of one another denote H, alkyl, haloalkyl, hydroxyalkyl, alkoxyalkyl, carboxyalkyl, carboxyl, unsubstituted or substituted aryl or aralkyl or R' and R 2 together denote unbranched or branched alkylene which is represented by 1 or 2 Carboxyl groups can be substituted.

Inventors

  • 👤 Hans Bosshard
  • 👤 Hans Dr. Greuter

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-05 05:45
CPC Classifications
C; C09; C09D; C09D5/00; C09D5/08; C09D5/082; C09D5/086; C07; C07D; C07D233/00; C07D233/04; C07D233/28; C07D277/00; C07D277/60; C07D277/62; C07D277/68; C07D277/70; C07D277/74

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