Ammonium Chloride Promoted Palladium-Catalyzed Ullmann Coupling of Aryl Bromide  

作　　者：李金恒 梁云 刘文杰 唐石 谢叶香 

机构地区：[1]Key Laboratory of Chemical Biology & Traditional Chinese Medicine Research, College of Chemistry and Chemi-cal Engineering, Hunan Normal University, Changsha, Hunan 410081, China

出　　处：《Chinese Journal of Chemistry》2004年第12期1432-1435,共4页中国化学（英文版）

基　　金：Project supported by the National Natural Science Foundation of China (No. 20202002); Hunan Province Department of Education (No. 02C211) and Hunan Normal University (2001).

摘　　要：In water, ammonium chloride was found to promote palladium-catalyzed Ullmann coupling reactions of aryl bromides. In the presence of Pd/C, zinc, NH4Cl, and water, coupling of various aryl bromides was carried out smoothly to afford the corresponding homocoupling products in moderate yields.In water, ammonium chloride was found to promote palladium-catalyzed Ullmann coupling reactions of aryl bromides. In the presence of Pd/C, zinc, NH4Cl, and water, coupling of various aryl bromides was carried out smoothly to afford the corresponding homocoupling products in moderate yields.

关 键 词：PD/C Ullmann coupling reaction ammonium chloride aryl bromides 

分 类 号：O625[理学—有机化学]