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- W2912521032 abstract "An aerobic coupling of 2-aminopyrimidines or 2-aminopyridines with trans-chalcones to afford aroylimidazo[1,2-a]pyrimidines and aroylimidazo[1,2-a]pyridines is reported. Reactions proceed in the presence of CuFe2O4 superparamagnetic nanoparticle catalyst, two equivalents of iodine, oxygen oxidant, and 1,4-dioxane solvent. The catalyst is superior to many common copper or iron complexes. Copper ferrite could be easily separated by magnetic decantation and reused up to 5 times without a major loss of activity. The method described here marks a rare example of using a simple, heterogeneous catalyst for synthesis of fused heterocycles. To our best knowledge, aroylimidazo[1,2-a]pyrimidines and aroylimidazo[1,2-a]pyridines were not previously synthesized using this protocol." @default.
- W2912521032 created "2019-02-21" @default.
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- W2912521032 date "2019-01-01" @default.
- W2912521032 modified "2023-10-02" @default.
- W2912521032 title "Superparamagnetic nanoparticle-catalyzed coupling of 2-amino pyridines/pyrimidines with <i>trans</i>-chalcones" @default.
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- W2912521032 doi "https://doi.org/10.1039/c9ra00097f" @default.
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