Three-component one-pot synthesis of dihydrochromeno[4,3-b]pyrazolo[4,3-e]pyridines

Abstract

A series of dihydrochromeno [4,3-b]pyrazolo[4,3-e]pyridines has been synthesized using a simple and efficient one-pot, three-component procedure. The products were obtained in good yields in the presence of heterogeneous nanoporous acid catalyst (SBA-Pr-SO 3 H).

A One-Pot, Three-Component, Solvent-Free Synthesis of Novel 6H-Chromeno[3’,4’:5,6]Pyrido[2,3-d]Pyrimidine-Triones under Microwave Irradiation

“…Consequently, as a continuation of our ongoing efforts on the synthesis of heterocyclic compounds, [16][17][18][19][20][21][22] we report a one-pot and green protocol for the synthesis from reactants 1-3 of the novel heterocyclic system, chromeno [3',4':5,6]pyrido[2,3-d] pyrimidine 6,8,10(9H,11H)-triones 4a-h. This protocol uses the important tools in green chemistry of microwave irradiation and solvent-free conditions (Scheme 1).…”