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.
Reaction of 2-aminobenzimidazole with acetylene
作者:L. V. Baikalova、E. S. Domnina、A. V. Afonin
DOI:10.1007/bf00863093
日期:1992.3
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.
Condensation reactions of vinyl and ethyl derivatives of 2-amino-and 2-formylimidazoles
作者:L. V. Baikalova、E. S. Domnina、N. N. Chipanina、A. V. Afonin、A. M. Shulunova
DOI:10.1007/bf02494645
日期:1999.5
New Schiff bases of 1-vinyl- and 1-ethyl-substituted imidazoles and benzimidazoles were synthesized. The condensationreactions of 2-amino- and 2-formylimidazoles with 2-aminobenzimidazoles are virtually independent of the nature of the substituent (CH=CH2 or Et) at position 1 of the heterocycle. The structures of the azomethines synthesized were established by1H NMR and IR spectroscopy.