Copper-Catalyzed Synthesis of Dibenzo[b,f]imidazo[1,2-d][1,4]oxazepine Derivatives via a Double Ullmann Coupling Reaction

Jian-Quan Liu,Xiang-Shan Wang,Xin-Yi Chen,Zhuo-Huan Li

SYNTHESIS-STUTTGART（2019）

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摘要

A double Ullmann coupling reaction successfully takes place between 4,5-diaryl-2-(2-bromophenyl)-1H-imidazoles and 2-bromophenols in the presence of Cs2CO3. This procedure is catalyzed by copper(I) iodide and o-phenanthroline and provides an efficient method for the synthesis of dibenzo[b, f] imidazo[1,2-d][1,4] oxazepine derivatives in good yields.

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关键词

Ullmann coupling,dibenzoimidazo[1,4] oxazepines,copper(I) iodide,o-phenanthroline,catalysis

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