Direct C-H Bond Activation of Benzoxazole and Benzothiazole with Aryl Bromides Catalyzed by Palladium（Ⅱ）-N-heterocyclic Carbene Complexes

作     者：Murat Kaloglu Nazan Kaloglur ismail Ozdemir 

作者机构：Department of Chemistry Faculty of Science and Arts inonu University 44280 Malatya Turkey Catalysis Research and Application Center inonu University 44280Malatya Turkey 

出 版 物：《Chinese Journal of Chemistry》 (中国化学（英文版）)

年 卷 期：2018年第36卷第9期

页      面：837-844页

核心收录：

学科分类：081705[工学-工业催化] 08[工学] 0817[工学-化学工程与技术] 0813[工学-建筑学] 0814[工学-土木工程] 

基　　金：supported by the Technological and Scientific Research Council of Turkey (TUBITAK-BOSPHORUS (France)) the Inonu University Research Fund (IUBAP) 

主　　题：benzimidazolium bromide benzoazoles direct C-H bond activation N-heterocyclic carbene palladium 

摘      要：Herein, we report that a series of novel palladium（II）-NHC complexes （NHC=N-heterocyclic carbene） were synthesized. The structures of all novel complexes were characterized by ^1H NMR, ^13C NMR, FT-IR spectroscopy and elemental analysis techniques. These palladium（ll）-NHC complexes were tested as efficient catalysts in the direct C-H bond activation of benzoxazole and benzothiazole with aryl bromides in the presence of 1 mol% catalyst loading at 150 ℃ for 4 h. Under the given conditions, various aryl bromides were successfully applied as the arylating reagents to achieve the 2-arylbenzoxazoles and 2-arylbenzothiazoles in acceptable to high yields.