SYNTHESIS OF 2-ARYLAZOBENZIMIDAZOLES ON THE BASIS OF AROMATIC HYDROCARBONS
Conditions that exclude "self-coupling" in the reaction of benzimidazole-2-diazonium salts with the simplest aromatic hydrocarbons were selected.The synthesis of 3'-tolyl- and 2'-6'-xylylazobenzimidazoles, which are isolated along with the expected isomers in diazo coupling with toluene and m-xylene, was also realized by an alternative pathway from the corresponding p-aminophenylazobenzimidazoles.The reaction of benzimidazole-2-diazonium salts with primary aromatic amines, which is complicated in the benzimidazole series by side reactions, was studied.The structures of the newly synthesized compounds were confirmed by spectral methods.
Kolodyazhnaya, S. N.,Divaeva, L. N.,Simonov, A. M.,Sogomonova, R. A.
p. 534 - 540
(2007/10/02)
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