Preparation of Methyltriazolo[1,4]benzodiazepine via Oxidative Activation of a Thiolactam for the Synthesis of BET Inhibitor Molibresib
作者:Greg A. Erickson、Mark A. Hatcher、Michel Journet、John A. Kowalski、Tom C. Lovelace、Christopher J. Pink、Shiping Xie
DOI:10.1021/acs.joc.1c00563
日期:2022.2.18
A novel oxidative activation of a thiolactam was developed for the preparation of methyltriazolo[1,4]benzodiazepine in a single step. A sulfenic acid (R-SOH) was proposed as the activated intermediate with the concurrent formation of acetylhydrazone from acethydrazide and cyclocondensation to the triazole. A version of the method with 35% peracetic acid was scaled up to 40 kg as a part of the new route
开发了一种硫内酰胺的新型氧化活化方法,用于一步制备甲基三唑并[1,4]苯二氮卓类药物。建议使用次磺酸 (R-SOH) 作为活化中间体,同时从乙酰肼生成乙酰腙,并环缩合生成三唑。作为合成 BET 抑制剂 molibresib (GSK525762) 的新路线的一部分,该方法的一个版本使用 35% 过氧乙酸被放大至 40 kg。硫内酰胺由市售的(2-氨基-5-甲氧基苯基)(4-氯苯基)甲酮分两步制备,产率为66%。简洁的四步合成提供了 52 kg 的 molibresib,其 ee > 99.9%,酮的总产率为 41%。甲基三唑的条件温和且没有敏感立体中心的外消旋化。氧化法,