Abstract
3,4-dihydropyrimidin-2(1H)-one and octahydroquinazolinone derivatives were obtained in high-to-excellent yields and short reaction times using SCMNPs@CA-EA-SO3H as a green and heterogeneous solid acid catalyst in a one-pot multi-component condensation of ethyl acetoacetate or dimedone, urea, and aldehyde compounds under solvent-free conditions. More importantly, the green catalytic system could be easily collected from the reaction solution utilizing an external magnet and reused for five runs with a negligible decrease in yields and reaction rate.
Keywords: Multicomponent condensation, heterogeneous solid acid catalyst, solvent-free conditions, 3, 4-dihydropyrimidin- 2(1H)-one, octahydroquinazolinone derivatives, SCMNPs@CA-EA-SO3H.
Graphical Abstract
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