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In this study, Fe3O4@SiO2-SO3H was prepared as an efficient and reusable solid acid catalyst and its catalytic activity was considered in the synthesis of pyrano[3,2-c]quinoline-2,5-dione derivatives by the three-component reaction of 4-hydroxyquinolin-2(1H)-one, Meldrum’s acid and arylaldehydes under thermal solvent-free conditions at 70 °C. This catalytic system can be reused minimally for five...
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