作者:Xiaoping Hou、Lucas W. Hernandez、Elizabeth A. Jurica、Rulin Zhao、Bei Wang、Michael Wong、Jung-Hui Sun、Dawn Sun、Dauh-Rurng Wu、Changxia Yuan、Michael Hay、Miao Yu、Ximao Wu、Yanting Huang、Bruce A. Ellsworth、Francisco Gonzalez Bobes、Arvind Mathur、James Kempson
DOI:10.1021/acs.oprd.3c00433
日期:2024.1.19
focus on phase-appropriate processes that circumvented key reagents with short supply in the original synthesis. The key transformations refined for large-scale production were an asymmetric aldol reaction, O-alkylation of an unstable intermediate, selective (Z)-olefination, and reduction of a Weinreb amide to aldehyde. Additionally, the new route circumvented stability issues of the core pyrrolidine
在此,我们描述了一系列制备先进 GPR40 激动剂(化合物1)的合成工作,重点是避开原始合成中供应短缺的关键试剂的适相工艺。大规模生产的关键转化是不对称羟醛反应、不稳定中间体的O-烷基化、选择性 ( Z )-烯化以及 Weinreb 酰胺还原为醛。此外,新路线通过从头合成避免了核心吡咯烷片段的稳定性问题,在环形成过程中实现了高dr。新的改进路线被有效地扩大规模,以制备超过 100 g API 用于毒理学研究。