Iminophosphorane-mediated annelation of an imidazole ring into a benzimidazole ring: synthesis of imidazo[1,5-a-]benzimidazole derivatives. Crystal structure of 1-(4-methoxyphenylimino)-2-(4-methoxyphenylcarbamoyl)-2,3-dihydro-1-imidazo[1,5-a]benzimidazole
作者:P. Molina、M. Alajarín、C. López-Leonardo、I. Madrid、C. Foces-Foces、F.H. Cano
DOI:10.1016/s0040-4020(01)80047-8
日期:1989.1
es 2 react with tertiary phosphines to give the corresponding 1-aroyl-4H-imidazo[1,5-a]benzimidazoles 4. On the other hand, iminophosphorane 5 derived from 2-azidomethylbenzimidazole and triphenylphosphine, reacts with aromatic isocyanates to give 1-arylimino-2-arylcarbamoyl-2,3-dihydro-1H-imidazo[1,5-a]benzimidazoles 9. The molecular structure of 9 has been established by means of 2D-NMR analysis
1-芳基-2-叠氮基甲基苯并咪唑2与叔膦反应生成相应的1-芳基-4H-咪唑并[1,5-a]苯并咪唑4。另一方面,由2-叠氮基甲基苯并咪唑和三苯基膦衍生的亚氨基磷烷5与芳族异氰酸酯,生成1-芳基氨基-2-芳基氨基甲酰基-2,3-二氢-1H-咪唑并[1,5-a]苯并咪唑9。9的分子结构已通过2D-NMR分析和X射线建立晶体学。