Chiral diaminophosphine ligands with stable C(aryl)N(amine) axial chirality derived from prolinol
作者:Takashi Mino、Youichi Tanaka、Yutaka Sato、Akio Saito、Masami Sakamoto、Tsutomu Fujita
DOI:10.1016/s0040-4039(03)01097-9
日期:2003.6
New type chiral ligands 3, which have a chiral carbon center and stable C(aryl)-N(amine) axial chirality, were prepared from chiral prolinol-derived aminophosphine oxide 4. Pd-catalyzed asymmetric allylic alkylation of 1,3-diphenyl-2-propenyl acetate (6) with a dimethyl malonate-BSA-LiOAc system was successfully carried out in the presence of 3d resulting in a good yield with good enantioselectivity (up to 95% ee). (C) 2003 Elsevier Science Ltd. All rights reserved.