空间位阻手性酮是合成活性药物成分的有用中间体。在这里,我们通过由野生型酮还原酶 (KRED) 酶促进的动力学拆分过程报告了一种可扩展且高度对映选择性的合成。对该过程进行了彻底调查,包括 DoE 优化和动力学研究。高达 0.8 kg 的放大演示揭示了酶聚集/失活的挑战,并提供了解决方案,以高产率和对映体过量获得所需的对映体,酶载量相对较低 (2-4 wt%)。
Development of a Scalable Synthesis toward a KRAS G12C Inhibitor Building Block Bearing an All-Carbon Quaternary Stereocenter, Part 2: Asymmetric Synthesis via Shi Epoxidation
作者:Zhulin Tan、Xuan Ju、Hao Wu、Weitong Dong、Joyce C. Leung、Xiaowen Hou、Heewon Lee、Alice Granger、Joshua M. Paolillo、Susan V. DiMeo、Chengsheng Chen、Linglin Wu、Jon C. Lorenz、Max Sarvestani、Frederic Buono、Rogelio Frutos、Thomas G. Tampone、Xiaojun Huang、Gulin Zhang、Yuwen Wang、Earl Spinelli、Zhen Lei、Jinhua J. Song
DOI:10.1021/acs.oprd.3c00363
日期:2024.1.19
The development of a scalable asymmetric synthesis of KRAS G12C inhibitor building block 1 is described. The all-carbon quaternary stereocenter was installed enantioselectively via Shi epoxidation, followed by a newly discovered regioselective LaCl3·2LiCl-catalyzed epoxide opening. Subsequent organocatalyzed oxidation provided the requisite ketone, which underwent the final assembly of the heterocyclic
ANNULATED 2-AMINO-3-CYANO THIOPHENES AND DERIVATIVES FOR THE TREATMENT OF CANCER
申请人:Boehringer Ingelheim International GmbH
公开号:US20210380574A1
公开(公告)日:2021-12-09
The present invention encompasses compounds of formula (I)
wherein R
1a
, R
1b
, R
2a
, R
2b
, Z, R
3
to R
5
, A, p, U, V, W, L and E have the meanings given in the claims and specification, their use as inhibitors of mutant Ras family proteins, pharmaceutical compositions and preparations containing such compounds and their use as medicaments/medical uses, especially as agents for treatment and/or prevention of oncological diseases.