kilogram scale is reported herein. The hydrochloride salt of AMG 925 was prepared in 23% overall yield over eight steps from commercially available raw materials, and more than 8 kg of the target molecule were delivered. The synthetic route features a Buchwald–Hartwig amination using BrettPhos as ligand and conducted to afford 12 kg of product in a single batch. In addition, this work highlights the challenges
本文报道了以千克规模生产候选药物
AMG 925的合成途径的发展。
AMG 925的盐酸盐是从市售原料中经8步以23%的总收率制备的,并交付了8 kg以上的目标分子。合成路线以布赫瓦尔德-哈特维格(Buchwald-Hartwig)胺化为特征,使用BrettPhos作为
配体,并进行了批量生产,可提供12千克产品。此外,这项工作突出了在生产活性药物成分中与难溶性加工中间体的使用相关的挑战。由于工艺中间体的溶解度低,必须设计出创新的解决方案来进行看似常规的活动,例如除盐,pH调节和清除重
金属。最后,