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An efficient method is introduced based on the copper(II) acetate catalyzed one-pot multicomponent synthesis of novel chromeno[4,3- b ]pyrano[3,4- e ]pyridine-6,8-dione derivatives under mild reaction conditions in water as a “green” solvent. The synthesis involves the multicomponent reaction of 4-aminocoumarin, 6-methyl-2 H -pyran-2,4(3 H )-dione, and aldehydes in the presence of 10 mol% of copper(II) acetate as catalyst under mild reaction conditions. Eight different derivatives are synthesized using various benzaldehydes with different functional groups. All the produced chromeno[4,3- b ]pyrano[3,4- e ]pyridine-6,8-diones were synthesized successfully in very good isolated yields. A possible mechanism was proposed and presented. In general, the method is simple and is based on commercially available reagents and catalyst.

polycyclic aromatic compounds

Cu(OAc) 2  Catalyzed Synthesis of Novel Chromeno [4,3- b ]Pyrano[3,4- e ]Pyridine-6,8-Dione Derivatives via a One-Pot Multicomponent Reaction in Water under Mild Reaction Conditions