Synthesis of the C(1)−C(18) Segment of Lophotoxin and Pukalide. Control of 2-Alkenylfuran (<i>E</i>/<i>Z</i>)-Configuration
作者:Peter Wipf、Michael J. Soth
DOI:10.1021/ol025861m
日期:2002.5.1
[reaction: see text] The convergent synthesis of the fully functionalized C(1)-C(18) segment 24 of the furanocembranes lophotoxin and pukalide was accomplished in 11 steps and 10% overall yield. The key step was a stereoselective conversion of alkynoate 21 to trimethylsilyl 2-alkenylfuran 22.
[反应:见正文]呋喃呋喃呋喃酯光致毒素和普卡利德的完全功能化的C(1)-C(18)区段24的收敛合成是通过11个步骤完成的,总产率为10%。关键步骤是将炔酸酯21立体选择性转化为三甲基甲硅烷基2-烯基呋喃22。