C - Chemistry – Metallurgy – 12 – P
Patent
C - Chemistry, Metallurgy
12
P
C12P 7/52 (2006.01) C07C 51/09 (2006.01) C12P 7/40 (2006.01) C12P 41/00 (2006.01)
Patent
CA 2169659
A process is disclosed for preparing (L)-2-chlorpropionic acid and its alkali, alkaline earth metal or ammonium salts. For that purpose, L-chlorpropionic acid isobutyl ester is hydrolysed at a pH value from 4 to 8 in the presence of a lipase from pseudomonas spec. DSM 8246 and the optically active reaction product is isolated from the reaction mixture or further reacted in situ in a per se known manner either directly or after conversion of the salt into the acid. The optically active products obtained by this process constitute important intermediate products for preparing plant protective agents.
Un procédé permet de préparer de l'acide chloropropionique-2-(L) et ses sels de métaux alcalins, de métaux alcalino-terreux ou d'ammonium. On hydrolyse l'ester isobutylique d'acide chloropropionique-L à une valeur de pH entre 4 et 8 en présence d'une lipase extraite de pseudomonas spec. DSM 8246, puis on isole le produit de réaction optiquement actif ou on continue à le faire réagir in situ de manière connue en soi soit directement, soit après conversion du sel en acide. Les produits optiquement actifs obtenus par ce procédé représentent d'importants produits intermédiaires pour la production d'agents phytosanitaires.
Hansen Hanspeter
Ladner Wolfgang
Rettenmaier Hansjorg
Zipperer Bernhard
Basf Aktiengesellschaft
Robic
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