Total Synthesis of Epothilones B and D: Stannane Equivalents for β-Keto Ester Dianions
作者:Gary E. Keck、Robert L. Giles、Victor J. Cee、Carrie A. Wager、Tao Yu、Matthew B. Kraft
DOI:10.1021/jo802215v
日期:2008.12.19
Studies leading to a total synthesis of epothilones B and D are described. The overall synthetic plan was based on late-stage fragmentassembly of two segments representing C(1)-C(9) and C(10)-C(21) of the structure. The C(1)-C(9) fragment was prepared by elaboration of commercially available (2R)-3-hydroxy-2-methylpropanoate at both ends of the three-carbon unit. Introduction of carbons 1-4 containing