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

Table 3

Effect of amount of catalyst on quinoxaline yields (%).

Entry	Catalyst Amount (mg)	Yield^a (%)
1	10	43
2	50	85
3	100	92
4	150	93

Reaction conditions: o-phenylenediamine, 1 mmol; benzyl, 1 mmol; toluene, 10 mL; supported catalyst: AlCuMoVP; 120 min, 25°C.