Synthesis of Novel Enantiopure Biphenyl <i>P</i>,<i>N-</i>Ligands and Application in Palladium-Catalyzed Asymmetric Addition of Arylboronic Acids to <i>N-</i>Benzylisatin
作者:Hongshan Lai、Zhiyan Huang、Qiong Wu、Yong Qin
DOI:10.1021/jo802036m
日期:2009.1.2
Enantiopure tetra-ortho-substituted biphenyl phosphinoimine ligands (Ra,S)-3 and (Sa,S)-3 were synthesized via multistep reactions. The first asymmetric addition reactions of arylboronic acids to N-benzylisatin catalyzed by Pd(OAc)2 and (Ra,S)-3 were studied to provide 3-aryl-3-hydroxyoxindoles in moderate yields and enantioselectivities.