Copper-Catalyzed Amide Radical-Directed Cyanation of Unactivated C<sub>sp</sub><sup>3</sup>–H Bonds
作者:Hongwei Zhang、Yulu Zhou、Peiyuan Tian、Cuiyu Jiang
DOI:10.1021/acs.orglett.9b00553
日期:2019.3.15
method for site-selective intermolecular δ/ε-Csp3–H cyanation of aliphatic sulfonamides is developed using TsCN as the cyanating reagent, catalyzed by a Cu(I)/phenanthroline complex. The mild, expeditious, and modular protocol allows efficient remote Csp3–H cyanation with good functional group tolerance and high regioselectivity. Mechanistic studies indicate that the reaction might proceed through a Cu(I)-mediated
一种用于方法位点选择性的分子间δ/ε-C SP 3 -H脂族磺酰胺的氰化使用TsCN作为氰化试剂,通过在Cu(I)/菲咯啉络合物催化的开发。温和,快捷和模块化的协议可实现高效的远程C sp 3 -H氰化反应,并具有良好的官能团耐受性和高区域选择性。机理研究表明,该反应可能通过Cu(I)介导的N-F键断裂而进行,以生成yl基,1,5-HAT,并通过TsCN生成的碳自由基进行氰基转移。