چکیده
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Magnetic NaY zeolite composite is a novel heterogeneous acid catalyst. This has been synthesized through the zeolite and the volume ratio of 2: 1 of Iron(III) chloride hexahydrate and Ammonium iron(II) sulfate hexahydrate with ammonia solution. Furthermore, the catalyst possesses the advantages of the high thermal stability (200 C), low cost for the simple synthetic procedure, and green reaction. Magnetic NaY zeolite composite is an efficient, readily available and reusable catalyst for the synthesis of dihydropyrano[3,2-b]chromenedione derivatives via the condensation of various aldehyde, and kojic acid with dimedone.
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