Process Development Overcomes a Challenging Pd-Catalyzed C–N Coupling for the Synthesis of RORc Inhibitor <b>GDC-0022</b>
作者:Lauren E. Sirois、David Lao、Jie Xu、Rémy Angelaud、Jerry Tso、Brandon Scott、Paroma Chakravarty、Sushant Malhotra、Francis Gosselin
DOI:10.1021/acs.oprd.0c00012
日期:2020.4.17
a challenging late-stage palladium-catalyzed C–N coupling of a bicyclic amine were likewise central to synthetic efforts. Understanding of this key reaction, as well as the development of API salt forms and isolations, ultimately enabled a successful reaction at 8.0 kg scale, utilizing 1.0 mol % XantPhos–Pd–G2 as precatalyst and, in turn, preparation of >5.0 kg of GDC-0022 tosylate salt for preclinical
描述了以公斤级合成GDC-0022(视黄酸受体相关孤儿受体γ(RORc)的抑制剂)的工艺开发。活性药物成分(API)的输送依赖于六元sultam结构单元的非对映选择性制备,以及在异质条件下进行苄基化。研究和优化具有挑战性的后期钯催化的双环胺的C–N偶联也是合成努力的核心。对这一关键反应的理解以及API盐形式和分离物的开发,最终使8.0 kg规模的反应得以成功进行,利用1.0 mol%XantPhos–Pd–G2作为前催化剂,进而制备了> 5.0 kg GDC-0022 将甲苯磺酸盐用于临床前需求。