Abstract We have synthesized rod-shaped tricyclic monoazo and bisazo dyes based on amino derivatives of arylpyrimidines and N, N-dialkylanilines or p-nitroso-N, N- dialkylanilines. We have shown that the process of azo coupling of the diazonium salt obtained from 2, 5-bis (p-arninophenyl) pyritnidine is accompanied by dediazoniation, with substitution of the diazonium group by hydrogen or an aryl group. The monoazo dyes ...
