Rhodium(III)‐Catalyzed Regioselective C−H Activation/Annulation for the Diverse Pyrazole‐Core Substituted Furans
作者:Hongyun Cai、Raju S. Thombal、Xin Li、Yong Rok Lee
DOI:10.1002/adsc.201900498
日期:2019.9.3
method for polyfunctionalized furans involving rhodium(III)‐catalyzed pyrazole‐ or indazole‐directed dual C−H functionalization with diazodicarbonyls has been developed. This strategy provides rapid access to diverse tetrasubstituted furans bearing various pyrazoles or indazoles. This unprecedented one‐pot protocol proceeds via cascade C−H activation, metal‐carbene formation, migratory insertion, intramolecular
已开发出一种新颖且简便的区域选择性合成方法,用于多官能化呋喃,包括铑(III)催化的吡唑或吲唑定向的重氮与双偶氮二羰基双官能化。该策略提供了快速接触带有各种吡唑或吲唑的各种四取代呋喃的途径。这一前所未有的单锅方案通过级联的CH活化,金属碳烯的形成,迁移插入,分子内环化和去质子化而进行。