Iridium-Catalyzed Unreactive C(sp<sup>3</sup>)–H Amination with 2,2,2-Trichloroethoxycarbonyl Azide
作者:Tao Zhang、Xuejiao Hu、Xunqing Dong、Guigen Li、Hongjian Lu
DOI:10.1021/acs.orglett.8b02738
日期:2018.10.5
An additive-assisted iridium-catalyzed directed C(sp3)–H amination with 2,2,2-trichloroethoxycarbonyl azide as an amino source is reported. Both carboxylate anions and the corresponding cations in the additives are crucial to achieve satisfactory efficiency. Sodium acetate or n-pentanoic acid can promote the amination of various primary C(sp3)–H bonds adjacent to secondary, tertiary, and quaternary
据报道,以2,2,2-三氯乙氧羰基叠氮化物为氨基源,可进行铱辅助的铱催化的直接C(sp 3)-H胺化反应。添加剂中的羧酸根阴离子和相应的阳离子对于获得令人满意的效率都是至关重要的。乙酸钠或正戊酸分别可促进酮肟或N-芳香族杂环中与仲碳,叔碳和季碳相邻的各种伯C(sp 3)-H键的胺化反应,从而提供了通向多功能β-氨基的实用途径酮肟和氮-杂芳基乙胺衍生物。胺化产物可以视为异氰酸酯类似物,并且可以转化为其他有用的氨基官能团。分离出一个环状化合物并鉴定为合理的中间体。