Process for the resolution of the racemate S-(carboxymethyl)-(RS)-cysteine (B)

US4411840A · kind A · utility

Assignee

• Degussa AG · DE

Inventors

• Horst Bethge · Hanau, DE
• Axel Kleemann · Hanau, DE
• Jurgen Martens · Alzenau, DE

Key dates

• Filing date: Aug 25, 1982
• Grant date: Oct 25, 1983
• Expiry date: Aug 25, 2002

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07B2200/07
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

There is described the resolution of the racemate S-(carboxymethyl)-(RS)-cysteine. It is carried out by means of the optical isomers of 1-phenyl-ethylamine. This process makes it possible to obtain in a simple manner S-(carboxymethyl)-(R)-cysteine which is important for pharmaceutical purposes and is made from synthetically produced cysteine.