Toward the Synthesis of Thapsigargin: Enantioselective Synthesis of 7,11-Dihydroxyguaianolides
作者:Francisco L. Manzano、Francisco M. Guerra、F. Javier Moreno-Dorado、Zacarías D. Jorge、Guillermo M. Massanet
DOI:10.1021/ol061024z
日期:2006.6.1
[reaction: see text] The enantioselective synthesis of a 7,11-dihydroxyguaianolide bearing the stereochemistry present in thapsigargin, a potent and selective inhibitor of the Ca(2+) SERCA-ATPase pumps, is described. Starting from (+)-dihydrocarvone, the synthesis presents two key steps. The first one involves the photochemical rearrangement of a gamma,delta-unsaturated ketone eudesmane into the corresponding
[反应:见正文]描述了一种7,11-二羟基胍基内酯的对映选择性合成,该立体化学存在于thapsigargin中,一种有效且选择性的Ca(2+)SERCA-ATPase泵抑制剂。从(+)-二氢香芹酮开始,合成过程提出了两个关键步骤。第一个涉及伽马,δ-不饱和酮杜鹃花的光化学重排成相应的愈创木酚。第二步包括未保护的四羟基化酮的区域选择性氧化,以提供具有所需立体化学的二羟基内酯。