[EN] alpha -SUBSTITUTION OF UNPROTECTED beta -AMINO ESTER COMPOUNDS<br/>[FR] alpha -SUBSTITUTION DE COMPOSES DE beta -AMINO ESTERS NON PROTEGES
申请人:AVENTIS PHARM PROD INC
公开号:WO2000040547A1
公开(公告)日:2000-07-13
Methods for stereoselective substitution in which a (mono or un)-α-substituted unprotected β-amino ester compound or salt thereof is reacted with an aliphatic electrophile in the presence of a base selected from alkyl lithium compounds, lithium hybride, lithium amide, lithium dialkyl amides and alkali hexamethyldisilylamines.