Phosphate Tether-Mediated Approach to the Formal Total Synthesis of (−)-Salicylihalamides A and B
作者:Rambabu Chegondi、Mary M. L. Tan、Paul R. Hanson
DOI:10.1021/jo200337v
日期:2011.5.20
A concise formal synthesis of the cytotoxic macrolides (−)-salicylihalamides A and B is reported. Key features of the synthetic strategy include a chemoselective hydroboration, highly regio- and diastereoselective methyl cuprate addition, Pd-catalyzed formate reduction, and an E-selective ring-closingmetathesis to construct the 12-membered macrocycle subunit. Overall, two routes have been developed
报告了细胞毒性大环内酯 (−)-水杨基卤酰胺 A 和 B 的简明正式合成。该合成策略的关键特征包括化学选择性硼氢化、高度区域和非对映选择性铜酸甲酯加成、Pd 催化的甲酸还原以及 E 选择性闭环复分解以构建 12 元大环亚基。总体而言,已经从易于制备的双环磷酸酯(4 个步骤)开发了两条路线,一条是 13 步路线,另一条是依赖于关键二醇的区域选择性酯化的更有效的 9 步顺序。