A simple and an efficient one-pot three-component reaction of arylamines, aromatic aldehydes, and cyclic ketones was described for the synthesis of various fused quinoline, benzoquinoline, and naphthoquinoline derivatives by using camphorsulfonic acid as a catalyst. The exploitation of pregnenolone steroid for benzoquinolines and terephthalaldehyde for bis-benzoquinolines synthesis was achieved with 68–75% yields. The reactivity of arylamines and the mechanistic study for the formation of benzoquinoline was described precisely. The present protocol offers a great potential for atom-economy under mild conditions.

中文翻译：

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樟脑磺酸催化一锅三组分反应合成熔融喹啉和苯并喹啉衍生物

描述了一种简单高效的芳胺，芳族醛和环状酮的一锅三组分反应，用于通过使用樟脑磺酸作为催化剂来合成各种稠合喹啉，苯并喹啉和萘喹啉衍生物。孕烯醇酮类固醇用于苯并喹啉的开发，对苯二甲醛用于双苯并喹啉的合成，收率为68-75％。精确描述了芳基胺的反应性和形成苯并喹啉的机理的研究。本协议在温和条件下为原子经济提供了巨大潜力。