Chemistry of Heterocyclic Compounds p. 538 - 543 (1990)
Update date:2022-07-31
Topics:
Kolodyazhnaya, S. N.
Divaeva, L. N.
Sogomonova, R. A.
Simonov, A. M.
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.
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