Solvent free one-pot multi-component synthesis of 3,4-dihydropyrimidin-2(1H)-ones catalyzed by mesoporous NH4H2PO4/MCM-41 as an environmentally friendly, cheap, and effective catalyst
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DOI: 10.1016/j.arabjc.2012.12.001
Abstract: Abstract A green and efficient method is described for the solvent free synthesis of 3,4-dihydropyrimidin-2(1H)-ones through one-pot three-component condensation of ethyl acetoacetate, an aryl aldehyde, and urea using mesoporous MCM-41 supported ammonium dihydrogen phosphate (NH4H2PO4/MCM-41)… read more here.
Keywords: synthesis dihydropyrimidin; nh4h2po4 mcm; one pot; catalyst ... See more keywords
Heteropoly-12-tungstophosphoric acid H3[PW12O40] over natural bentonite as a heterogeneous catalyst for the synthesis of 3,4-dihydropyrimidin-2-(1H)-ones
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DOI: 10.1016/j.arabjc.2020.04.034
Abstract: Abstract Heteropolyacid 12-tungstophosphoric acid H3[PW12O40] (TPA) immobilized over natural bentonite (bent) using the impregnation method. Prepared catalyst were well characterized by XRD, FT-IR and FeSEM. The catalytic activity of three catalysts 10%, 20% and 30%… read more here.
Keywords: synthesis dihydropyrimidin; natural bentonite; catalyst; synthesis ... See more keywords
One-pot synthesis of 3,4-dihydropyrimidin-2(1H)-ones catalyzed by SO3H@imineZCMNPs as a novel, efficient and reusable acidic nanocatalyst under solvent-free conditions
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DOI: 10.1039/c8ra08622b
Abstract: The synthesis of 3,4-dihydropyrimidin-2(1H)-one derivatives was accomplished efficiently via a three-component reaction between ethyl acetoacetate, various types of aldehydes, and urea in the presence of 10 mg SO3H@imineZCMNPs as a novel, environment friendly, and reusable… read more here.
Keywords: so3h iminezcmnps; synthesis dihydropyrimidin; microscopy; iminezcmnps novel ... See more keywords
Solvent and catalyst free synthesis of 3,4-dihydropyrimidin-2(1H)-ones/thiones by twin screw extrusion
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DOI: 10.1039/c9gc00036d
Abstract: Rapid, high yielding, and solvent and catalyst free synthesis of 3,4-dihydropyrimidin-2-(1H)-ones/thiones by twin screw extrusion. read more here.
Keywords: solvent catalyst; dihydropyrimidin ones; free synthesis; catalyst free ... See more keywords
Ionic liquid-assisted synthesis of dihydropyrimidin(thi)one Biginelli adducts and investigation of their mechanism of urease inhibition
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DOI: 10.1039/c9nj03556g
Abstract: Three out of twenty-six synthesized Biginelli adducts were identified as potent competitive urease inhibitors. read more here.
Keywords: biginelli adducts; biginelli; liquid assisted; ionic liquid ... See more keywords