Twofold Radical-Based Synthesis of <i>N</i>,<i>C</i>-Difunctionalized Bicyclo[1.1.1]pentanes
作者:Helena D. Pickford、Jeremy Nugent、Benjamin Owen、James. J. Mousseau、Russell C. Smith、Edward A. Anderson
DOI:10.1021/jacs.1c04180
日期:2021.7.7
Bicyclo[1.1.1]pentylamines (BCPAs) are of growing importance to the pharmaceutical industry as sp3-rich bioisosteres of anilines and N-tert-butyl groups. Here we report a facile synthesis of 1,3-disubstituted BCPAs using a twofold radical functionalization strategy. Sulfonamidyl radicals, generated through fragmentation of α-iodoaziridines, undergo initial addition to [1.1.1]propellane to afford iodo-BCPAs;
双环[1.1.1] pentylamines(BCPAs)是重要性日益增加,以制药业作为藻3个苯胺和富含的bioisosters ñ -叔丁基的基团。在这里,我们报告了使用双重自由基功能化策略轻松合成 1,3-二取代 BCPA。磺胺基自由基,通过 α-碘氮丙啶的碎裂产生,经过初始添加到 [1.1.1] 丙烷中,得到碘-BCPA;然后通过甲硅烷基介导的 Giese 反应将这些产物中新形成的 C-I 键功能化。这种化学反应也可以顺利转化为 1,3-二取代碘-BCP。可容纳多种自由基受体和碘-BCPA,可直接获取一系列有价值的类苯胺等排体。