Asymmetric induction in the addition of enantiomerically pure H -phosphinate to chiral aldimines: diastereoselective generation of α-amino phosphinates with P , C -stereogenic centers
作者:Meng Yang、Hao Xu、Zhong-Yang Zhou、He Zhang、Li-Juan Liu、Yong-Ming Sun、Shao-Zhen Nie、Chang-Qiu Zhao
DOI:10.1016/j.tetasy.2016.06.022
日期:2016.10
alpha-Amino phosphinates with P,C-stereogenic centers were prepared from a P-retained addition of (R-p)-(-)-menthyl H-phenylphosphinate to (R)-aldimines with up to 86:14 dr under catalyst and solvent free condition at ambient temperature; the single (S-p,S alpha-c)-stereoisomers were isolated in moderate yields. Chirality on the nitrogen of chiral aldimine was proposed to control the stereoselectivity, and the (-)-menthoxyl showed mismatched asymmetric induction with (S)-aldimines. (C) 2016 Elsevier Ltd. All rights reserved.