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中文摘要：
在超声波辐射下,芳香醛、1,3-环己二酮和2-氨基苯并咪唑3组分在离子液体（[bmim]Br）介质中经Biginelli反应＂一锅煮＂合成了一系列新型苯并咪唑并[2,1-b]喹啉-6-酮衍生物.2-氨基苯并咪唑的使用是对经典的Biginelli反应的发展,并且该方法具有反应条件温和、产率较高（65%～86%）及环境友好等优点.产物经IR,1HNMR和元素分析确证了结构.
英文摘要：
A novel series of benzimidazo[2,1-b]quinazolin-6-ones derivatives was synthesized by a threecomponent Biginelli condensation reaction of aldehydes,2-aminobenzimidazole and 1,3-cyclohexanedione, employing ionic liquid[bmim]Br as a solvent under ultrasound irradiation. The classical Bignelli reaction has been extended by the use of 2-aminobenzimidazole and this method has the advantages of milder reaction conditions,short reaction time（ 0. 5 h） ,good yields（ 65% —86% ） and environmental benignity. The structures of the products were characterized by IR,1H NMR spectra and elemental analysis.
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