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US 6,686,182 B2Granted
Alkyl esters of 3-(3,4-dihalophenyl)-2,6-dioxopiperidine-3-propionic acid of use as intermediates
AssigneeSanofi-Synthelabo
InventorsBertrand Castro, Jean-Robert Dormoy, Alain Rabion
Life of this patent
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Abstract
The invention relates to lower-alkyl esters of 3-(3,4-dihalophenyl)-2,6-dioxopiperidine-3-propionic acid derivatives, and to processes for preparing the same.
Claims3
A process for the preparation of a compound of S configuration corresponding to the formula
- in which X represents a halogen and R1 represents a linear C1-C4 alkyl, wherein an enantioselective enzymatic hydrolysis of a compound of formula:
- in which X represents a halogen and R1 represents a linear C1-C4 alkyl, is carried out.
Dependencies are inferred from the claim text.