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US 4,408,068 AGranted
Process for the preparation of optically active 2-chloropropionic acid esters
AssigneeHoechst Aktiengesellschaft
InventorManfred Koch
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Abstract
What is disclosed is a process for the preparation of optically active 2-chloropropionic acid esters by the decomposition of optically active 2-chlorosulfinoxypropionic acid esters in the presence of quaternary ammonium or phosphonium salts as catalysts.
Claims8
A method for making an optically active 2-chloropropionic acid ester of the formula ##STR4## wherein R is (C.sub.1 -C.sub.6) alkyl, which method comprises decomposing an optically active 2-chlorosulfinoxypropionic acid ester of the formula ##STR5## in the presence of a quaternary ammonium salt or of a phosphonium salt as a catalyst.
Dependencies are inferred from the claim text.