Condensation of 5-amino-3-(2-pyrrolyl)pyrazoles with 1-vinyl(ethyl)-2-formylimidazoles afforded complex heterocyclic ensembles: Schiff bases containing pyrrole, pyrazole, and imidazole rings. The cis, trans-orientation of CH=N and CH2=CH groups and E-isomeric structure of the Schiff bases under study with respect to the imine fragment, and also the presence of intra- and intermolecular hydrogen bonds were established.
Synthesis of Functionalized 2-(2-Pyrrolyl)pyrazolo[1,5-a]pyrimidines
作者:O. V. Petrova、L. N. Sobenina、A. P. Demenev、A. I. Mikhaleva、I. A. Ushakov
DOI:10.1023/b:rujo.0000010564.39518.5e
日期:2003.10
Reactions of 5-amino-3-(2-pyrrolyl)pyrazoles with beta-dicarbonyl compounds (acetylacetone and ethyl acetoacetate) lead to formation of up to 90% of polysubstituted pyrazolo[1,5-a]pyrimidines.
Sobenina; Mikhaleva; Petrova, Russian Journal of Organic Chemistry, 1999, vol. 35, # 8, p. 1214 - 1218
作者:L. V. Baikalova、L. N. Sobenina、A. I. Mikhaleva、I. A. Zyryanova、N. N. Chipanina、A. V. Afonin、B. A. Trofimov
DOI:10.1023/a:1013978102866
日期:——
Condensation of 5-amino-3-(2-pyrrolyl)pyrazoles with 1-vinyl(ethyl)-2-formylimidazoles afforded complex heterocyclic ensembles: Schiff bases containing pyrrole, pyrazole, and imidazole rings. The cis, trans-orientation of CH=N and CH2=CH groups and E-isomeric structure of the Schiff bases under study with respect to the imine fragment, and also the presence of intra- and intermolecular hydrogen bonds were established.