Unusual formation of 2,5-diarylpyrazines from αα′-dibromoacetophenone azines and hydrazine
Abstract
The reaction of αα′-dibromoacetophenone azines (I) with hydrazine results in the formation of the corresponding 2,5-diarylpyrazines; 2,5-diphenylpyrazine was also obtained from the thermolysis of α,α′-diazidoacetophenone azines.