Palladium-catalyzed enantioselective synthesis of cyclohexene derivatives via kinetic resolution
作者:Toyoki Nishimata、Kentaro Yamaguchi、Miwako Mori
DOI:10.1016/s0040-4039(99)01079-5
日期:1999.7
Reaction of (+/-)-methyl 2-arylcyclohexenyl carbonate with tosyl amide in the presence of a catalytic amount of Pd(2)dba-CHCl3 and (S)-BINAPO produced 2-arylcyclohexenyl tosyl amide with a high ee along with the starting material with a high ee. The reaction involved two processes, and (+)- and (-)-methy] 2-arylcyclohexenyl carbonate gave the same (pi-allyl)palladium complex with a chiral ligand, which gave 2-arylcyclohexenyl tosyl amide with a high ee by enantioselective substitution. The intermediary (pi-allyl)palladium complex was synthesized, and the results of X-ray crystallography are shown. (C) 1999 Elsevier Science Ltd. All rights reserved.