Contribution to the study of the mechanism of the Ullmann biaryl condensation. The reaction of 2,3-dichloronitrobenzene
作者:Yves Mugnier、Etienne Laviron
DOI:10.1039/p29790001264
日期:——
The reaction of 2,3-dichloronitrobenzene with copper bronze gives, in a total yield of 100%, 1,5-dinitrobiphenylene and 1,5,9-trinitrotriphenylene. The formation of these compounds necessarily implies an initial ortho–meta coupling, which rules out a free-radical process, and a mechanism involving the coupling of two molecules of an organocopper intermediate. The results are, on the contrary, in good