The present invention relates to a process (Mukaiyama Aldol reaction) for thepreparation of compounds of formula (I) wherein R1 is C1-4 alkyl, C3-6 cycloalkyl-C1-4 alkyl or aryl-C1-4 alkyl; R2 is C1-4 alkyl, benzyl, substituted benzyl or allyl; R3 is C1-4 alkyl or allyl; R4 is C1-4 alkyl, allyl, benzyl or substituted benzyl; R4’ is benzyl or substituted benzyl; or R1 and R4 together form a (CH2)3-group.
Synthesis of alpha-amino-beta-alkoxy-carboxylic acid esters
申请人:Schmid Rudolf
公开号:US20050272665A1
公开(公告)日:2005-12-08
Compounds of formula I
and a process for the preparation of such compounds are disclosed.