Highly stereoselective total synthesis of tylonolide, the aglycon of the 16-membered macrolide antibiotic tylosin. II. Total synthesis of tylonolide by virtue of 4-methoxybenzyl and 3,4-dimethoxybenzyl protection.
摘要:
泰诺内酯(Tylonolide)是由双丙酮葡萄糖通过两个片段 i (2) (C-11-C-17)和 ii (3) (C-1-C-10)的偶联和环化合成的。一种 Prelog-Djerassi 内酯型化合物是合成后一个片段的中间体。用 Yamaguchi 方法对这两个部分进行酯化,然后用 Wittig-Horner 反应进行大环化,得到 16 元环烯酮,去除其保护基团后得到泰诺内酯。在整个合成过程中,4-甲氧基苄基和 3,4-二甲氧基苄基保护基团发挥了重要作用。
Highly stereoselective total synthesis of tylonolide, the aglycon of the 16-membered macrolide antibiotic tylosin. I. Construction of the C-1-C-8 chiral centers.