Sadahiro Ishida, Y. Fukushima, S. Sekiguchi
Mar 1, 1975
Citations
0
Influential Citations
7
Citations
Journal
Bulletin of the Chemical Society of Japan
Abstract
2-Aryloxybenzimidazoles gave tris(benzimidazo)-[1,2-a: 1′,2′-c: 1″,2″-e]-1,3,5-triazine and phenol in almost quantitative yields upon heating at 230–250 °C, while in the reaction in cumene small amounts of 2-aryloxy-1,2′-dibenzimidazole and dicumyl were obtained along with the major products. On the other hand, 2-phenylthiobenzimidazole gave diphenyl disulfide and 1,2′-dibenzimidazole, together with tris(benzimidazo)-1,3,5-triazine. The thermolysis is assumed to proceed by step-by-step radical processes involving the formation of such intermediates as 2-aryloxy-1,2′-dibenzimidazole and 2-aryloxy-1,2′-1′,2″-trisbenzimidazole.