作者:Youseung Shin、Jean-Hugues Fournier、Arndt Brückner、Charitha Madiraju、Raghavan Balachandran、Brianne S. Raccor、Michael C. Edler、Ernest Hamel、Rachel P. Sikorski、Andreas Vogt、Billy W. Day、Dennis P. Curran
DOI:10.1016/j.tet.2007.05.033
日期:2007.8
Total syntheses of (-)-dictyostatin, 6,16-bis-epi-dictyostatin, 6,14,19-tris-epi-dictyostatin and a number of other isomers and analogs are reported. Three main fragments-top, middle and bottom-were first assembled and then joined by olefination or anionic addition reactions. After appending the two dienes at either end of the molecule, macrolactonization and deprotection completed the syntheses. The
报告了 (-)-dictyostatin、6,16-bis-epi-dictyostatin、6,14,19-tris-epi-dictyostatin 和许多其他异构体和类似物的总合成。三个主要片段——顶部、中间和底部——首先组装,然后通过烯化或阴离子加成反应连接。在分子的任一端附加两个二烯后,大环内酯化和脱保护完成合成。这项工作证明了 (-)-dictyostatin 的相对和绝对构型。这些化合物通过基于细胞的微管质量增加和抗增殖活性的测量、体外微管蛋白聚合试验以及与紫杉醇在微管上的结合位点的竞争试验进行评估。