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:
一种制备具有结构的对映异构富集的环烷烯基丙
氨酸化合物的方法:通过在适当的反应介质中,在存在将过渡
金属基团络合到手性
膦配体的催化剂的情况下,对具有结构的脱氢
氨基酸化合物进行不对称加氢,以制备具有结构的对映异构富集的环烷烯基丙
氨酸化合物,该化合物是ACE
抑制剂雷米普利和佩利多普利的关键中间体。