Asymmetric induction in the addition of enantiomerically pure H -phosphinate to chiral aldimines: diastereoselective generation of α-amino phosphinates with P , C -stereogenic centers
摘要:
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.
Asymmetric induction in the addition of enantiomerically pure H -phosphinate to chiral aldimines: diastereoselective generation of α-amino phosphinates with P , C -stereogenic centers
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.
Double Asymmetric Induction During the Addition of (<i>R</i><sub>P</sub>)-Menthyl Phenyl Phosphine Oxide to Chiral Aldimines