A Concise Enantioselective Synthesis of Fluorinated Pyrazolo-Piperidine GSK3901383A Enabled by an Organocatalytic Aza-Michael Addition
作者:Benedict Barron、Colin Edge、Sabine Fenner、Harry Shrives、Steven Sollis、Matthew Whiting、Damien Valette
DOI:10.1021/acs.orglett.3c03694
日期:2024.3.1
A highly enantioselective organocatalytic aza-Michael addition of 4-nitro-pyrazole to ethyl (E)-2,2-difluoro-5-oxopent-3-enoate has been developed. This reaction enabled a concise, four-step, stereoselective synthesis of highly functionalized 3,3-difluoro-4-pyrazolo-piperidine GSK3901383A, a key intermediate for the synthesis of a leucine-rich repeat kinase 2 inhibitor API. Computational analysis provided
开发了 4-硝基-吡唑与 ( E )-2,2-二氟-5-氧代戊基-3-烯酸乙酯的高度对映选择性有机催化氮杂迈克尔加成反应。该反应实现了高度功能化的 3,3-二氟-4-吡唑并哌啶 GSK3901383A 的简洁、四步立体选择性合成,GSK3901383A 是合成富含亮氨酸的重复激酶 2 抑制剂 API 的关键中间体。计算分析可以深入了解催化系统的空间要求,从而能够合理选择高选择性催化剂。