Synthesis of Quinoxaline Derivatives via Condensation of Aryl-1,2-diamines with 1,2-Diketones Using (NH4)6Mo7O24•4H2O as an Efficient, Mild and Reusable Catalyst

Ammonium heptamolybdate tetrahydrate [(NH4)(6)Mo7O24 center dot 4H(2)O] efficiently catalyzes the condensation of aryl-1,2-diamines with 1,2-diketones in EtOH/H2O as a green media at room temperature to afford quinoxaline derivatives as biologically interesting compounds. Ease of recycling of the catalyst is one of the most advantages of the proposed method.