A facile method of preparation of benzimidazoles by microwave irradiation was described. The mixtures of o-phenylenediamine and carboxylic acids were heated by microwave irradiation, to give 2-substituted benzimidazoles with yields of 49%~93%. The reaction time was shortened to 3~6 min. However, the reaction of ethylenediamine with carboxylic acids did not give imidazoles but the N,N-diacyl ethylenediamines. The alphatic diamines lacked the activity to form imidazole ring. With adipic acid, intermolecular acylation took place to afford poly(ethylene adipamide).
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机译:Controle de la morphologie et mecanismes de Renforcement Dun Reseau Epoxyde a Base de menthane Diamine par UN Elastomere(形态控制和增强机制,使用弹性体在环氧网络中基于Diamine mentha