A Unified Total Synthesis of the Immunomodulators (−)-Rapamycin and (−)-27-Demethoxyrapamycin: Construction of the C(21−42) Perimeters
作者:Amos B. Smith、Stephen M. Condon、John A. McCauley、Johnnie L. Leazer、James W. Leahy、Robert E. Maleczka
DOI:10.1021/ja963066w
日期:1997.2.1
A total synthesis of the potent, naturally occurring immunomodulators (−)-rapamycin (1) and (−)-27-demethoxyrapamycin (2) has been achieved via a unified, highly convergent synthetic strategy. Both targets were elaborated from common building blocks A−E, the latter available in decagram quantities. Herein we present the construction of the ABC northern perimeters of 1 and 2. The accompanying paper
强效天然免疫调节剂 (-)-雷帕霉素 (1) 和 (-)-27-去甲氧基雷帕霉素 (2) 的全合成已通过统一、高度收敛的合成策略实现。这两个目标都是从共同的构建块 A-E 精心设计的,后者以十克的数量提供。在此,我们介绍了 ABC 北部周边 1 和 2 的建设。随附的论文描述了南部周边 DE 段的准备、三烯和脱保护模型研究以及合成企业的完成。该方法的显着特点包括三取代烯烃的立体选择性 σ 键结构和通过有效的二噻烷偶联结合高级中间体。