Patent · US Expired

Preparation of optically active 2-halopropionic acids

US5763659A · kind A · utility

0Cited by

2References

11Claims

0Family size

Assignee

BASF SE

Inventors

Hans Rupert Merkle · Ludwigshafen, DE
Erich Fretschner · Neckarsteinach, DE
Hanspeter Hansen
Bernhard Zipperer · Dirmstein, DE

Key dates

Filing date	Jul 1, 1997
Grant date	Jun 9, 1998
Priority date	—
Expiry date	Jul 1, 2017

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07C51/09
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

The present invention relates to a process for the preparation of optically active 2--halopropionic acids, in which the corresponding optically active alkyl 2--halopropionates are caused to react with a carboxylic acid at elevated temperature in a transacylation reaction with the formation of the optically active 2--halopropionic acid and the alkyl carboxylate, and the optically active 2--halopropionic acid obtained is separated from the reaction mixture. The optically active products produced are important intermediates for the preparation of plant protectants and pharmaceuticals.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.