The reaction of 2,3-di-iodonitrobenzene with copper bronze in dimethylformamide gives 1.5-dinitrobiphenylene, 2,2'-di-iodo-6,6'-dinitrobiphenyl, and 4.5.1 2.1 3-tetranitrotetraphenylene. A reaction mechanism is suggested. ... CORBETT and HOLT reported that the reaction between copper bronze and 3,4-dibromo-5-nitrotoluene in boiling dimethylformamide gave a 40% yi;eld of a dimethyl- dinitrobiphenylene. McOmie and his co-workers have ...
