Process for preparation of optically active sulfonamides and intermediates for their synthesis
申请人:——
公开号:US20040049041A1
公开(公告)日:2004-03-11
A method including resolution of a diastereomeric mixture represented by the formula
1
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
a
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.