H_5PW(10)V_2O_(40)催化高效环保合成14-芳基-14H-二苯并[a,j]氧杂蒽(英文)  

Highly Efficient and Environmentally Friendly Preparation of 14-Aryl-14H-dibenzo[a,j]xanthenes Catalyzed by Tungsto-divanado-phosphoric Acid

作　　者：Reza TAYEBEE Shima TIZABI 

机构地区：[1]Department of Chemistry,School of Sciences,Hakim Sabzevari University

出　　处：《催化学报》2012年第6期962-969,共8页

摘　　要：A rapid and efficient procedure for the preparation of various aryl-14H-dibenzo[a,j]xanthenes was reported.The method developed produced excellent yields via one-pot condensation of β-naphthol with various aryl-aldehydes in the presence of Keggin vanadium substituted heteropolyacid,H5PW10V2O40,as catalyst under solvent free conditions.The present methodology therefore offered several advantages but not limited to excellent yields(82%-98%),short reaction times(30-50 min),mild reaction conditions,simple work-up,as well as the utilization of cheap and environmentally benign catalyst in the absence of organic solvents.A rapid and efficient procedure for the preparation of various aryl-14H-dibenzo[a,j]xanthenes was reported.The method developed produced excellent yields via one-pot condensation of β-naphthol with various aryl-aldehydes in the presence of Keggin vanadium substituted heteropolyacid,H5PW10V2O40,as catalyst under solvent free conditions.The present methodology therefore offered several advantages but not limited to excellent yields（82%-98%）,short reaction times（30-50 min）,mild reaction conditions,simple work-up,as well as the utilization of cheap and environmentally benign catalyst in the absence of organic solvents.

关 键 词：XANTHENE one-pot condensation ALDEHYDE Β-NAPHTHOL HETEROPOLYACID KEGGIN SOLVENT-FREE 

分 类 号：O626[理学—有机化学]