The synthesis of fiveand six-membered oxygen-and nitrogen-containing heterocycles has been regarded as the most fundamental issue in organic chemistry and chemical industry because they are used in producing high-value products. In this study, an efficient, economic, sustainable, and green protocol for multicomponent synthesis has been developed. The one-pot direct Knoevenagel condensation−Michael addition−cyclization sequences for the transformation of aromatic aldehydes, malononitrile, and 4-hydroxycoumarin or phthalhydrazide generate the corresponding dihydropyrano[2,3-c]chromenes and 1Hpyrazolo[1,2-b]phthalazine-5,10-diones over a novel mesoporous metal− organic framework-based supported Cu(II) nanocatalyst
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