Development of a Two-Step, Enantioselective Synthesis of an Amino Alcohol Drug Candidate
作者:Michael A. Schmidt、Emily A. Reiff、Xinhua Qian、Chao Hang、Vu Chi Truc、Kenneth J. Natalie、Chenchi Wang、Jacob Albrecht、Andrew G. Lee、Ehrlic T. Lo、Zhiwei Guo、Animesh Goswami、Steven Goldberg、Jaan Pesti、Lucius T. Rossano
DOI:10.1021/acs.oprd.5b00192
日期:2015.9.18
The process development and large scale synthesis for the β-hydroxyamino amide 1 is described. The route evolved from a multistep sequence utilizing a classical resolution to a two-step enantioselective process involving an enzyme-catalyzed aldol reaction and a direct amidation of a carboxylic acid. By utilizing a silicon-mediated direct amidation strategy, the route was devoid of protecting and deprotecting
描述了β-羟基氨基酰胺1的方法开发和大规模合成。该途径从利用经典拆分的多步骤序列发展到涉及酶催化的醛醇缩合反应和羧酸的直接酰胺化的两步对映选择性过程。通过利用硅介导的直接酰胺化策略,该途径缺乏保护和脱保护步骤,同时保留了高度敏感的β-羟基氨基酸的立体化学完整性。两步策略可采用本文显著提高了产率,工艺绿度,周期时间,和估算成本生产1。