Abstract
ABSTRACTA new copper acetylacetonate immobilized on halloysite nanotube (HNT) was synthesized. For this purpose, (3‐aminopropyl)trimethoxysilane (AMPTSi) was covalently bonded to the surface of halloysite nanotubes, and then copper acetylacetonate was immobilized onto the modified support. The chemical and physical structure of Cu(acac)2/AMPTSi/HNTs were characterized via various analyses such as TEM, SEM, EDS, FTIR, XRD, TGA, and N2 adsorption–desorption. The efficiency of this catalyst was studied in a one‐pot three‐component reaction of benzaldehydes, dimedone, and malononitrile/ethyl cyanoacetate for the synthesis of 4H‐chromenes. For all substrates, good to excellent yields of the corresponding 4H‐chromenes were obtained.
Published Version
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