Towards the Synthesis of (-)-Callipeltoside A: Stereoselective Synthesis of the C1-C14 Macrolactone Core
作者:Jhillu S. Yadav、Animesh Haldar、Tapas Maity
DOI:10.1002/ejoc.201101635
日期:2012.4
macrolide (–)-callipeltoside A has been achieved by utilizing an anti-selective aldol reaction and Wittig olefination to introduce an (E)-trisubstituted alkene, chemoselective diisobutylaluminum hydride (DIBAL-H) reduction of the 2,3-epoxy tosylate to install the C13 stereocenter, and intramolecular trapping of the acyl-ketene intermediate by the C13 hydroxy group as key steps.
细胞毒性大环内酯 (-)-callipeltoside A 的 C1-C14 大环内酯核心的高度立体选择性合成已通过利用抗选择性羟醛反应和 Wittig 烯化引入 (E)-三取代烯烃、化学选择性二异丁基氢化铝 (DIBAL) 实现-H) 还原 2,3-环氧甲苯磺酸盐以安装 C13 立体中心,以及通过 C13 羟基对酰基-烯酮中间体的分子内捕获作为关键步骤。