Toward the Total Synthesis of the Brasilinolides: Construction of a Differentially Protected C20−C38 Segment
作者:Ian Paterson、Paul M. Burton、Christopher J. Cordier、Michael P. Housden、Friedrich A. Mühlthau、Olivier Loiseleur
DOI:10.1021/ol802769e
日期:2009.2.5
An efficient, convergent synthesis of a differentially protected C20−C38 segment of the brasilinolides is described. Iterative 1,4-syn aldol additions and ketone reductions were employed to construct the two related stereotetrads, while a sequence of Horner−Wadsworth−Emmons (HWE) coupling, CBS reduction, and Sharpless AE installed the epoxy alcohol functionality.