Ir-Catalyzed C–H Amidation Using Carbamoyl Azides for the Syntheses of Unsymmetrical Ureas
作者:Kwangho Yoo、Jooyeon Lee、Myung Hwan Park、Youngjo Kim、Hyun Jin Kim、Min Kim
DOI:10.1021/acs.joc.0c00659
日期:2020.5.1
An iridium-catalyzed C-H amidation for the syntheses of unsymmetrical urea was developed using carbamoyl azides (R(R')N-C(O)-N3) as the nitrogen source. A combination of iridium and silver gave an active catalyst for C-N bond formation. A variety of urea derivatives were synthesized using carbamoyl azides with only dinitrogen byproducts. Finally, the use of the transientdirectinggroupstrategy with