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 transient directing group strategy with
使用氨基甲酰叠氮化物 (R(R')NC(O)-N3) 作为氮源,开发了一种用于合成不对称尿素的铱催化 CH 酰胺化。铱和银的组合为CN键的形成提供了活性催化剂。使用仅含二氮副产物的氨基甲酰基叠氮化物合成了多种脲衍生物。最后,使用具有氨基甲酰叠氮化物的瞬态导向基团策略扩展了催化 CH 酰胺化的底物范围,以产生含醛的不对称脲。