2-Cyanomethylbenzimidazole was synthesized from o-phenylene diamine. It is found in experiments that morpholine / acetic acid was an effective catalyst for the Knoevenagel reaction of 2-cyanomethylbenzimidazole with aromatic aldehyde. New bis-benzimidazole acrylonitrile and indolyl benzimidazole acrylonitrile derivatives were prepared. 2-Benzimidazoleacetate prepared by hydrolysis and esterifacation underwent sequential Knoevenagel and intramolecular transesterification to give benzimidazolyl coumarin deriv...
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