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:
一种制备对映富集的
环烷基取代的丙
氨酸化合物的过程,其结构为:通过在适当的反应介质中,在具有过渡
金属基团络合手性
膦配体的
催化剂存在下,对具有下列结构的
脱氢氨基酸化合物进行不对称
氢化,制备对映富集的
环烷基取代的丙
氨酸化合物,其结构为式(IA)或式(IB),这些化合物是ACE
抑制剂雷米普利和
培哚普利的关键
中间体: