作者:Seung-Yong Seo、Jae-Kyung Jung、Seung-Mann Paek、Yong-Sil Lee、Seok-Ho Kim、Kwang-Ok Lee、Young-Ger Suh
DOI:10.1021/ol0363366
日期:2004.2.1
feature of this synthetic route involves the highly stereoselective construction of the vinyl-substituted bicyclic lactone by an intramolecular Pd(0)-catalyzed allylic alkylation and its facile conversion to the hydroxy bicyclic lactone skeleton of bacillariolide III, induced by stereoselective vinylcerium addition to the aldehyde. In addition, the (Z)-pentenoic acid was efficiently introduced by the
[反应:见正文] bacillariolide III的不对称全合成反应是通过15个线性步骤完成的,总收率为14.6%。该合成途径的关键特征涉及通过分子内Pd(0)催化的烯丙基烷基化反应对乙烯基取代的双环内酯进行高度立体选择性的构建,以及通过向立体选择性乙烯基铈中添加立体定向而诱导的其容易地转化为芽孢杆菌内酯III的羟基双环内酯骨架。醛。另外,通过内部羟基束缚的闭环复分解(RCM)有效地引入了(Z)-戊烯酸。