Practical Synthesis of Chiral 2-Morpholine: (4-Benzylmorpholin-2-(<i>S</i>)-yl)-(tetrahydropyran-4-yl)methanone Mesylate, a Useful Pharmaceutical Intermediate
作者:Michael E. Kopach、Utpal K. Singh、Michael E. Kobierski、William G. Trankle、Michael M. Murray、Mark A. Pietz、Mindy B. Forst、Gregory A. Stephenson、Vincent Mancuso、Thierry Giard、Michel Vanmarsenille、Thierry DeFrance
DOI:10.1021/op800247w
日期:2009.3.20
A commercial synthesis was developed for the production of (4-benzylmorpholin-2-(S)-yl)-(tetrahydropyran-4-yl)methanone mesylate, 1a, a key starting material for a phase 2, new investigational drug candidate at Eli Lilly and Company. The target compound was produced in the clinical pilot plant by the combination of two key steps: resolution of a morpholine amide intermediate to install the S-morpholino
开发了一种商业合成方法,用于生产甲磺酸(4-苄基吗啉-2-(S)-基)-(四氢吡喃-4-基)甲酮甲磺酸酯1a,是第2阶段的关键原料,这是Eli的新候选药物礼来公司。目标化合物是通过两个关键步骤的组合在临床试验工厂中生产的:拆分吗啉酰胺中间体,以35%的收率安装S-吗啉代立构中心,并进行高产率(89%)格氏反应以生成标题分离为甲磺酸盐的化合物1a。当使用I 2的组合时,发现格氏反应最佳地进行并使用DIBAL-H进行初始化。另外,通过ReactMax量热法监测格氏试剂的形成,并完成了概念验证研究,表明格氏试剂步骤有可能作为镁回收的连续过程进行。