Studies on the chemical reactivity of 1H-benzimidazol-2-ylacetonitrile towards some 3-substituted chromones: synthesis of some novel pyrido[1,2-a]benzimidazoles
作者:Magdy A. Ibrahim
DOI:10.1016/j.tet.2013.06.011
日期:2013.8
A simple and convenient synthesis of a novel series of pyrido[1,2-a]benzimidazoles was efficiently achieved from the condensation reactions of 1H-benzimidazol-2-ylacetonitrile (1) with some 3-substituted chromones, chromone-3-carboxylic acids, chromone-3-carboxamides, ethyl chromone-3-carboxylates and chromone-3-carbonitriles. Reaction of compound 1 with 2-aminochromone-3-carboxaldehydes produced
1 H-苯并咪唑-2-基乙腈(1)与某些3-取代的色酮,色酮-3-羧基的缩合反应可有效地简单,方便地合成一系列新的吡啶并[1,2- a ]苯并咪唑类化合物酸,苯甲酸酯-3-甲酰胺,苯甲酸酯-3-羧酸盐和苯甲酸酯-3-甲腈。化合物1与2-氨基色酮-3-羧醛的反应产生2-氨基-3-(1H-苯并咪唑-2-基)铬诺[2,3- b ]吡啶。还讨论了反应机理和光谱数据。