A General and Simple Diastereoselective Reduction by L-Selectride: Efficient Synthesis of Protected (4S,5S)-Dihydroxy Amides
作者:Bo Yin、Dong-Nai Ye、Kai-Hui Yu、Liang-Xian Liu
DOI:10.3390/molecules15042771
日期:——
A general approach to (4S,5S)-4-benzyloxy-5-hydroxy-N-(4-methoxybenzyl) amides 10 based on a diastereoselective reduction of (5S,6RS)-6-alkyl-5-benzyloxy-6-hydroxy-2-piperidinones 6 and their tautomeric ring-opened keto amides 7 is described. The reduction with L-Selectride at -20 °C to room temperature afforded the products 10 in excellent yields and moderate to high syn-diastereoselectivities.
本文介绍了一种基于非对映选择性还原 (5S,6RS)-6-烷基-5-苄氧基-6-羟基-2-哌啶酮 6 及其同分异构体开环酮酰胺 7 的 (4S,5S)-4-苄氧基-5-羟基-N-(4-甲氧基苄基)酰胺 10 的一般方法。在 -20 °C 至室温条件下,用 L-选择性氮化物进行还原,得到了产率极佳、具有中等至高同-非对映选择性的产物 10。