Intermediate for preparing a biaryl compound

摘要

An optically active compound of formula (la'):
wherein
R 10 is a substituted or unsubstituted alkyl or aryl group,
R 11 is a substituted or unsubstituted alkoxycarbonyl group,
R 12 is a hydrogen atom,
R 13 is a C1-C4 alkyl group,
n 11 , n 12 and n 13 are each independently 0 or 1,
the carbon atom marked with * is an asymmetric carbon atom,
provided that R 10 is not a trifluoromethyl group, a nonafluorobutyl group or a pentafluorophenyl group; and a process for preparing the same.