Catalytic Asymmetric Generation of (<i>Z</i>)-Disubstituted Allylic Alcohols
作者:Luca Salvi、Sang-Jin Jeon、Ethan L. Fisher、Patrick J. Carroll、Patrick J. Walsh
DOI:10.1021/ja0762285
日期:2007.12.1
one-pot method for the direct preparation of enantioenriched (Z)-disubstituted allylicalcohols is introduced. Hydroboration of 1-halo-1-alkynes with dicyclohexylborane, reaction with t-BuLi, and transmetalation with dialkylzinc reagents generate (Z)-disubstituted vinylzinc intermediates. In situ reaction of these reagents with aldehydes in the presence of a catalyst derived from (-)-MIB generates (Z)-disubstituted