Abstract The solid-phase synthesis of 1, 2-benzophenazine and various N- methylbenzimidazoles using o-diaminoarenes is very promising and permits the synthesis of 1-methyl-4, 5-[b] naphtho-1H-imidazole, which could not be obtained by the condensation of o-diaminoarenes with paraformaldehyde using the standard liquid-phase method.
[Nakao, Yoshiaki; Kanyiva, Kyalo Stephen; Oda, Shinichi; Hiyama, Tamejiro Journal of the American Chemical Society, 2006 , vol. 128, # 25 p. 8146 - 8147]