three-component synthesis of 2-amino-4-substituted-1,4-dihydrobenzo[4,5]imidazolo[1,2-a]pyrimidine-3-carbonitrile derivatives by the reaction between various aldehydes with 2-aminobenzimidazole and malononitrile with an excellent output and in low-response period was studied in the presence of Ag–TiO2 nanocomposite as an efficient and recyclable catalyst undersolvent-freeconditions at 60 °C. The results
摘要通过各种醛与2-的反应,一锅三组分合成2-氨基-4-取代的1,4-二氢苯并[4,5]咪唑并[1,2 - a ]嘧啶-3-腈在无溶剂条件下于60°C的条件下,以Ag-TiO 2纳米复合材料作为有效和可回收的催化剂,研究了氨基苯并咪唑和丙二腈具有优异的产量和低响应时间。结果表明,所需产物的分离可通过简单过滤实现,并且Ag-TiO 2纳米复合材料可重复使用并连续重复使用。 图形摘要