作者:Mingji Dai、Isaac J. Krauss、Samuel J. Danishefsky
DOI:10.1021/jo8016814
日期:2008.12.19
nucleophilic methylation. An RCMreaction to produce a tetrasubstituted double bond in the presence of free allylic alcohol and homoallylic oxygenated functional group is also described. This route shortened the synthesis of 11 from 9 steps to 3 steps. We have further developed a strategy to gain access to optically active spirotenuipesines A and B through the synthesis of enantioenriched 10 from commercially
Spirotenuipesines A 和 B 是由 Oshima 和同事从昆虫病原真菌 Paecilomyces tenuipes 中分离出来的。该合成的特点是通过分子内环丙烷化/自由基引发的断裂序列以及 α-亚甲基内酯亲双烯体 20 和协同二烯6a。C(9) 叔醇的安装通过亲核甲基化发生。还描述了在游离烯丙醇和高烯丙基含氧官能团存在下产生四取代双键的RCM反应。该路线将11种化合物的合成从9步缩短至3步。我们进一步开发了一种策略,通过从市售的 R-(-)-环氧氯丙烷合成对映体富集的 10 来获得光学活性的螺环肽 A 和 B。