作者:Victor Garcia-Ruiz、Simon Woodward
DOI:10.1016/s0957-4166(02)00574-8
日期:2002.10
The alcohols (S)-(C5H11CH)-C-n(R)CH2OH (R = Me, Et) have been prepared by Evans' alkylation chemistry (>98% e.e.). For R = Me [alpha](D) = -15.5 (c 0.31, MeOH); for R = Et [alpha](D) = +6.8 (c 0.31, MeOH). Equivalent alcohols are obtained by Baeyer-Villiger oxidative cleavage of (S)-(-)-(C5H11CH)-C-n(R)CH2COMe (R = Me, 85% e.e.; R = Et, 62% e.e.) derived from catalytic asymmetric conjugate addition. Thus, AlMe3 or ZnEt2 addition to the Si face of the enone generates a (-) antipode with a 4S stereocentre. (C) 2002 Elsevier Science Ltd. All rights reserved.