Search for Highly Efficient, Stereoselective, and Practical Synthesis of Complex Organic Compounds of Medicinal Importance as Exemplified by the Synthesis of the C21C37 Fragment of Amphotericin B
作者:Guangwei Wang、Shiqing Xu、Qian Hu、Fanxing Zeng、Ei-ichi Negishi
DOI:10.1002/chem.201302383
日期:2013.9.23
Highly stereoselective: A highly efficient, stereoselective and practical synthesis of the C21C37 fragment of amphotericin B was realized in 25 % overall yield in eight longest linear steps from commercially available ethyl (S)‐3‐hydroxybutyrate by using Fráter–Seebach alkylation, Brown crotylboration, Negishi coupling, Heck reaction, and Horner–Wadsworth–Emmons (HWE) olefination as key steps (see
高度立体选择性:通过使用 Fráter-Seebach 烷基化从市售的 ( S )-3-羟基丁酸乙酯中,通过八个最长的线性步骤,以 25% 的总收率实现了两性霉素 B的 C21 C37 片段的高效、立体选择性和实用合成,布朗巴豆基硼化、Negishi 偶联、Heck 反应和 Horner-Wadsworth-Emmons (HWE) 烯化是关键步骤(见图)。