Metal-free C–H amination of arene with <i>N</i>-fluorobenzenesulfonimide catalysed by nitroxyl radicals at room temperature
作者:Qi Miao、Zhong Shao、Cuiying Shi、Lifang Ma、Fang Wang、Ruoqi Fu、Haochen Gao、Ziyuan Li
DOI:10.1039/c9cc02739d
日期:——
amination of arenethrough C–H bond cleavage employing N-fluorobenzenesulfonimide (NFSI) as the amination reagent in good to excellent yields with broad arene scope in the absence of any metal, ligand or additive is reported. Unlike previous transition metal-catalysed aminations in which high reaction temperatures are usually necessary, this novel reaction at room temperature is the first example of C–H
DDQ-promoted direct C5-alkylation of oxazoles with alkylboronic acids via palladium-catalysed C–H bond activation
作者:Bowen Lei、Xiaojiao Wang、Lifang Ma、Huixuan Jiao、Lisi Zhu、Ziyuan Li
DOI:10.1039/c7ob01083d
日期:——
A novel and concise C5-alkylation of oxazole using alkylboronic acids as the alkyl donor via Pd(II)-catalysed C-H bond activation has been achieved in moderate to good yields with satisfactory functional group tolerance. Instead of commonly used BQ as a key promoter, DDQ was discovered to be a better additive that significantly promoted this alkylation. This efficient and advanced method represents
Iron-catalyzed C(5)−H Imidation of Azole with <i>N</i>
-Fluorobenzenesulfonimide
作者:Xiaojiao Wang、Bowen Lei、Lifang Ma、Huixuan Jiao、Wenhua Xing、Jiaming Chen、Ziyuan Li
DOI:10.1002/adsc.201701124
日期:2017.12.19
An iron(II)‐catalyzed direct imidation of oxazole and thiazole with N‐fluorobenzenesulfonimide (NFSI) through C(5)−H bond cleavage is disclosed, providing C5‐imidated azoles in moderate to excellent yields with broad substrate scope. This reaction represents the first iron‐catalyzed C−Himidation of arene where NFSI serves as the imidation reagent, and potentially constitutes an efficient access to