Method of preparing d,l-phenylalanine

US4400533A · kind A · utility

Assignee

• Dynamit Nobel GmbH · DE

Inventors

• Helmut aus der Funten · Merzig, DE
• Klaus Schrage · Hennef (Sieg), DE

Key dates

• Filing date: Feb 8, 1982
• Grant date: Aug 23, 1983
• Expiry date: Feb 8, 2002

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C227/08
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A process for preparing an alkali salt of d,l-phenylalanine and the free acid thereof is disclosed. According to the invention an alkali salt of phenylpyruvic acid is reacted at elevated pressure with hydrogen and ammonia in the presence of a noble metal catalyst of Group VIII. If the acid is desired it is obtained by acidification of the corresponding salt.