作者:Gaël Jalce、Xavier Franck、Blandine Seon-Meniel、Reynald Hocquemiller、Bruno Figadère
DOI:10.1016/j.tetlet.2006.06.060
日期:2006.8
Stereoselective synthesis of C13–C29 fragment of caribenolide I, a potent antitumour macrolide isolated from a marine dinoflagellate Amphidinium sp. is described. The key step relies on a highly diastereoselective C-glycosylation, using a bulky chiral oxazolidin-2-thione, to control the absolute configuration of C21. The C24 and C25 stereogenic centres were controlled by the enantioselective vinylogous
的C立体选择性合成13 -C 29 caribenolide I的片段,一种有效的抗肿瘤大环内酯类从海生鞭毛藻中分离前沟藻。描述。关键步骤依赖于高非对映选择性的C-糖基化,使用庞大的手性恶唑烷-2--2-硫酮来控制C 21的绝对构型。C 24和C 25立体异构中心由对映选择性乙烯基Mukayiama aldol反应控制,而C 14和C 16立体异构中心由手性双环氧化物构建。