PROCESS FOR PREPARATION OF OPTICALLY ACTIVE SULFONAMIDES AND INTERMEDIATES FOR THEIR SYNTHESIS

摘要

A method including resolution of a diastereomeric mixture represented by the formula wherein R<1> and R<2> are the same or different and each is an optionally substituted hydrocarbon group or an optionally substituted heterocyclic group, only one of R<1> and R<2> contains one asymmetric carbon, and R is an optically active and optionally substituted hydrocarbon group or an optically active and optionally substituted heterocyclic group, or a salt thereof, to produce the diastereomer having a steric configuration of the asymmetric carbon for R<1> or R<2> of an R configuration or an S configuration, or a salt thereof.