An Efficient Protocol for the Synthesis of Quinoxaline Derivatives at RoomTemperature Using Recyclable Alumina-Supported Heteropolyoxometalates

DIEGO M. RUIZ; JUAN C. AUTINO; NANCY QUARANTA; PATRICIA G. VÁZQUEZ; GUSTAVO P. ROMANELLI

The scientific world journal

Hindawi Publishing Corporation

Lugar: Article ID 174784; Año: 2012 p. 1 - 8

1537-744X

We report a suitable quinoxaline synthesis using molybdophosphovanadates supported on commercial alumina cylinders as catalysts.These catalysts were prepared by incipient wetness impregnation. The catalytic test was performed under different reaction conditions in order to know the performance of the synthesized catalysts. The method shows high yields of quinoxaline derivativesunder heterogeneous conditions. Quinoxaline formation was obtained using benzyl, o-phenylenediamine, and toluene as reaction solvent at room temperature. The CuH2PMo11VO40 supported on alumina showed higher activity in the tested reaction. Finally,various quinoxalines were prepared under mild conditions and with excellent yields.