Enantioselective process for cycloalkenyl β-substituted alanines
申请人:Liu Zijun
公开号:US08558023B2
公开(公告)日:2013-10-15
A process for preparing an enantiomerically enriched cycloalkene-substituted alanine compound having the structure:
by asymmetrically hydrogenating a dehydro amino acid compound having the structure:
in a suitable reaction media in the presence of a catalyst having a transition metal moiety complexed to a chiral phosphine ligand to prepare enantiomerically enriched cycloalkene substituted alanine compounds having the structure of Formula (IA) or (IB), which are key intermediates for the ACE inhibitors ramipril and perindolpril:
ENANTIOSELECTIVE PROCESS FOR CYCLOALKENYL ?-SUBSTITUTED ALANINES
申请人:Liu Zijun
公开号:US20110257408A1
公开(公告)日:2011-10-20
A process for preparing an enantiomerically enriched cycloalkene-substituted alanine compound having the structure:
by asymmetrically hydrogenating a dehydro amino acid compound having the structure:
in a suitable reaction media in the presence of a catalyst having a transition metal moiety complexed to a chiral phosphine ligand to prepare enantiomerically enriched cycloalkene substituted alanine compounds having the structure of Formula (IA) or (IB), which are key intermediates for the ACE inhibitors ramipril and perindolpril: