Synthesis of a C1C14 subunit of the macrodiolide antibiotics pamamycin-607 and pamamycin-635B
作者:Robert D. Walkup、Young Soo Kim
DOI:10.1016/0040-4039(95)00471-n
日期:1995.5
A nonracemic C1C14 portion of the antibiotics pamamycin-607 and -635B was prepared using a route which features two stereoselective aldol reactions (including an apparent kinetic resolution via the Evans aldol reaction), a stereospecific intramolecular oxymercuration of a γ-silyloxyallene, a stereospecific conjugate reduction of a β-alkoxy-α-methylene carboxylate ester, and use of the 2,6-di--butyl-4-methoxyphenyl
非外消旋Ç 1 C 14的抗生素pamamycin-607和-635B部使用其具有两个立体选择性醛醇缩合反应(包括经由埃文斯醛醇缩合反应的表观动力学拆分)的路由,一个γ-silyloxyallene的立体有择的分子内oxymercuration制备,β-烷氧基-α-亚甲基羧酸酯的立体定向共轭还原,以及使用2,6-二-丁基-4-甲氧基苯基酯基团来“保护”羧酸酯官能团免受通常在酯基团上发生的反应的影响。