Silver-Catalyzed Cross-Coupling of Isocyanides and Active Methylene Compounds by a Radical Process
作者:Jianquan Liu、Zhenhua Liu、Peiqiu Liao、Lin Zhang、Tao Tu、Xihe Bi
DOI:10.1002/anie.201504254
日期:2015.9.1
Isocyanides are versatile building blocks, and have been extensively exploited in CH functionalization reactions. However, transition‐metal‐catalyzed direct CH functionalization reactions with isocyanides suffer from over‐insertion of isocyanides. Reported herein is a radical coupling/isomerization strategy for the cross‐coupling of isocyanides with active methylene compounds through silver‐catalysis
异氰酸酯是多用途的构建基块,并已在CH官能化反应中得到广泛利用。但是,过渡金属催化的直接CH官能团与异氰酸酯的反应会过度插入异氰酸酯。本文报道了一种自由基偶联/异构化策略,用于通过银催化将异氰酸酯与活性亚甲基化合物交叉偶联。该方法解决了过度插入问题,并提供了多种在无碱和无配体条件下难以合成的β-氨基烯酮和三羰基甲烷的方法。本报告介绍了两种基本化学物质的新的基本的CC键形成反应。