Process for the preparation of basically substituted phenylacetonitriles

US4697035A · kind A · utility

Assignee

• Ludwig Heumann & Co. GmbH · DE

Inventors

• Lothar Kisielowski · Nuremberg, DE
• Ingomar Grafe · Nürnberg, DE
• Walter Liebenow · Nuremberg, DE
• Kurt H. Ahrens · Nürnberg, DE

Key dates

• Filing date: Jun 3, 1985
• Grant date: Sep 29, 1987
• Expiry date: Jun 3, 2005

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C255/00
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A simplified process for the preparation of basically substituted phenylacetonitriles, in particular of verapamil, is described. This process is carried out with fewer stages and higher yields than the known processes according to the state of the art.