Synthesis and Application of Chiral Phospholane Ligands Bearing a Sterically and Electrically Adjustable Moiety
作者:Kazuhiko Matsumura、Hideo Shimizu、Takao Saito、Hidenori Kumobayashi
DOI:10.1002/adsc.200390008
日期:2003.1
A series of C1-symmetric phosphine-phospholane ligands, 1-(disubstituted phosphino)-2-(phospholano)benzenes (5), which are called UCAPs, with an achiral phosphino group and a chiral phospholane which can be sterically and electrically adjustable, has been designed and synthesized. In the asymmetric hydrogenation of (Z)-N-benzoyl-1-phenylpropenamine (3), the stereorecognition abilities of the 5d−e–Rh
一系列的C 1对称膦-膦配体,1-(二取代膦基)-2-(膦基)苯(5),称为UCAP,具有非手性膦基和可空间和电调节的手性膦酸酯,已经设计和合成。在(Z)-N-苯甲酰基-1-苯基丙胺(3)的不对称氢化中,非手性磷上具有较大芳基取代基的5d-e -Rh催化剂的立体识别能力优于DuPHOS- Rh催化剂。讨论了不同取代基对非手性磷原子的影响。