The reaction of 2-aminobenzimidazole (1) with acetylene under pressure proceeds with the formation of vinyl monomers, corresponding to amine and imine forms, 1-vinyl-2-amino- and 1,3-divinyl-2-iminobenzimidazoles, depending on the reaction conditions. 1,3-Divinyl-2-benzimidazolone was also isolated in aqueous dioxane in addition to the monovinyl derivative of 1. Cyclization of the divinyl derivative of 1 with acetylene proceeds to give 9-vinyl-1,2-dimethylimidazo[1,2-a]-benzimidazole.
Baikalova; Chipanina; Korotaeva, Russian Journal of Coordination Chemistry, 2000, vol. 26, # 3, p. 195 - 198
作者:Baikalova、Chipanina、Korotaeva、Trofimov
DOI:——
日期:——
Synthesis and structure of azomethines based onN-vinyl derivatives of 2-amino- and 2-formylimidazoles
作者:L. V. Baikalova、E. S. Afonin、E. S. Domnina
DOI:10.1007/bf02495132
日期:1997.10
New Schiff's bases of the N-vinylimidazole and N-vinylbenzimidazole series were synthesized. H-1 NMR data suggest that the azomethines exist in the E-form with respect to the CH=N bond and that the vinyl groups have trans-orientation relative to each other.