Environmentally benign and one-pot synthesis of 14-aryl-14H-dibenzo[a,j]xanthenes catalyzed by acyclic Br酶nsted acidic ionic liquid [H-NMP][HSO₄] under green conditions

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• 作者：Hossein Naeimi ; Zahra Sadat Nazifi
• 关键词：2-Naphthol ; Aldehydes ; One-pot reaction ; Brø ; nsted Acidic Ionic Liquids ; Eco-friendly ; Xanthene
• 刊名：Comptes Rendus Chimie
• 出版年：January, 2014
• 年：2014
• 卷：17
• 期：1
• 页码：41-48
• 全文大小：1495 K

文摘

A convenient and efficient direct protocol for the preparation of 14-aryl-14H-dibenzo[a,j]-xanthenes was described. The condensation of 2-naphthol with various aromatic aldehydes in the presence of a catalytic amount of [H-NMP][HSO₄] as a Br酶nsted acidic ionic liquid under solvent-free conditions at 110 掳C was described. This method has the following advantages: the reaction workup is very easy, and the catalyst is smoothly recycled to catalyze the preparation of 14-aryl-14H-dibenzo[a,j]xanthenes with high yields through a green and one-pot procedure. The corresponding products have been obtained in excellent yields, with high purity, and in short reaction times.