The heterocyclic ionic liquid-catalyzed direct oxidative amination of benzylic sp3 C–H bonds via intermolecular sp3 C–N bond formation for the synthesis of N-alkylated azoles under metal-free conditions is reported for the first time. The catalyst 1-butylpyridinium iodide can be recycled and reused with similar efficacies for at least eight cycles.
A new approach to synthesize N‐alkylation of azoles by iron(III)‐catalyst undersolvent‐freeconditions was developed. The method is broad in scope and highly efficient.
Direct C–N Coupling of Imidazoles and Benzylic Compounds via Iron-Catalyzed Oxidative Activation of C–H Bonds
作者:Qinqin Xia、Wanzhi Chen、Huayu Qiu
DOI:10.1021/jo201253m
日期:2011.9.16
Iron-catalyzed direct C-N bond formation between imidazoles and benzylic hydrocarbons is described. The reaction utilizes an inexpensive iron catalyst-oxidant system that is suitable for the coupling of a range of benzylic C-H bonds with various imidazoles.