Tetrahedron Letters

Cu 2 O-catalyzed Ullmann-type reaction of vinyl bromides with imidazole and benzimidazole

G Shen, X Lv, W Qian, W Bao

Index: Shen, Guodong; Lv, Xin; Qian, Weixing; Bao, Weiliang Tetrahedron Letters, 2008 , vol. 49, # 29-30 p. 4556 - 4559

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Citation Number: 29

Abstract

Cu2O was found to be an efficient and economical metal catalyst in the Ullmann cross- coupling reaction of vinyl bromides with imidazole or benzimidazole. The system Cu2O/ethyl 2-oxocyclohexanecarboxylate showed high catalytic activity in MeCN at 80–90° C. The reaction gave the corresponding coupling products in good to excellent yields.

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