137676-63-2Relevant academic research and scientific papers
DIAZO COMPOUNDS OF THE HETEROCYCLIC SERIES. 4. SOME PECULIARITIES OF THE DIAZO COUPLING OF BENZIMIDAZOLE-2-DIAZONIUM SALTS WITH PHENOLS AND THEIR ETHERS
Kolodyazhnaya, S. N.,Divaeva, L. N.,Sogomonova, R. A.,Simonov, A. M.
, p. 538 - 543 (2007/10/02)
The corresponding hydroxy (methoxy)-substituted azobenzimidazoles were obtained by diazo coupling of benzimidazole-2-diazonium salts with phenols and their complete and incomplete ethers in strongly acidic media; in the case of phenol ethers the process is complicated by dealkylation of the methoxy group in the ortho position relative to the diazo bridge.
