P-chiral β-aminophosphine oxides vs. β-aminophosphines as auxiliaries for ruthenium catalysed enantioselective transfer hydrogenation of arylketones
作者:Anna M. Maj、K.M. Pietrusiewicz、Isabelle Suisse、Francine Agbossou、André Mortreux*
DOI:10.1016/s0022-328x(01)00678-7
日期:2001.4
Enantiopure P-chiral β-aminophosphine oxides and the corresponding β-aminophosphines have been synthesised and used as chiral auxiliaries in ruthenium catalysed asymmetric transfer hydrogenation of arylketones producing optically active alcohols up to 80% ee. Both types of auxiliaries provide comparable induction levels but the β-aminophosphine oxide ligands induce higher catalytic activities generally
已经合成了对映纯的P-手性β-氨基膦氧化物和相应的β-氨基膦,并用作钌催化的芳基酮的不对称转移氢化反应中的手性助剂,产生的光学活性醇含量高达80%ee。两种类型的助剂均提供可比较的诱导水平,但β-氨基膦氧化物配体通常诱导更高的催化活性。在一些实验中,当改变催化剂前体中的非手性芳烃配体时,观察到产物构型的独特逆转。