The preparation and wittig condensations of C-4 thiazole phosphonium methylides
作者:David R. Williams、Dawn A. Brooks、Jimmie L. Moore、Andrew O. Stewart
DOI:10.1016/0040-4039(95)02358-5
日期:1996.2
A modification of the Hantzsch thiazole synthesis is described which produces C4 thiazolylmethyl phosphonium salts. Ylides are condensed with a variety of aldehydes to produce a series of 2,4-disubstituted thiazoles.
Asymmetric allylation. An effective strategy for the convergent synthesis of highly functionalized homoallylic alcohols
作者:David R. Williams、Dawn A. Brooks、Kevin G. Meyer、Michael P. Clark
DOI:10.1016/s0040-4039(98)01557-3
日期:1998.10
A survey of stereoselective syntheses of highly-functionalized homoallylicalcohols is described via asymmetric allylation. Initial transmetalation from an allylic stannane to a C-2 symmetric chiral borane controller is followed by low temperature addition to aldehydes efficiently effecting convergent strategies to complex targets.