Silica Gel-Supported Polyphosphoric Acid （PPA/SiO2）： An Efficient and Reusable Heterogeneous Catalyst for Facile Synthesis of 14-Aryl-14H-dibenzo[aj]xanthenes under Solvent-free Conditions  

作　　者：Khojastehnezhad Amir Davoodnia Abolghasem Bakavoli Mehdi Tavakoli-Hoseini Niloofar Zeinali-Dastmalbaf Mohsen 

机构地区：[1]Department of Chemistry, Faculty of Sciences, Islamic Azad University, Mashhad Branch, Mashhad, Iran

出　　处：《Chinese Journal of Chemistry》2011年第2期297-302,共6页中国化学（英文版）

摘　　要：A simple, efficient and green method for the synthesis of 14-aryl-14H-dibenzo[aj]xanthenes by a one-pot condensation reaction of β-naphthol and aryl aldehydes using silica gel-supported polyphosphoric acid （PPA/SiO2）, an effective and reusable catalyst, under solvent-free conditions is described. The present methodology offers several advantages, such as a simple procedure with an easy work-up, short reaction times, high yields, and the absence of any volatile and hazardous organic solvents.A simple, efficient and green method for the synthesis of 14-aryl-14H-dibenzo[aj]xanthenes by a one-pot condensation reaction of β-naphthol and aryl aldehydes using silica gel-supported polyphosphoric acid （PPA/SiO2）, an effective and reusable catalyst, under solvent-free conditions is described. The present methodology offers several advantages, such as a simple procedure with an easy work-up, short reaction times, high yields, and the absence of any volatile and hazardous organic solvents.

关 键 词：14-Aryl-14H-dibenzo[a j]xanthenes PPA/SiO2 heterogeneous catalysis green chemistry solvent-flee conditions 

分 类 号：O623.423[理学—有机化学] TQ426.6[理学—化学]