Visible-Light-Induced Radical Condensation Cyclization to Synthesize 3,4-Dihydropyrimidin-2-(1H)-ones/thiones Using Photoexcited Na2 Eosin Y as a Direct Hydrogen Atom Transfer (HAT) Catalyst
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DOI: 10.1021/acsomega.1c05808
Abstract: The data suggests that Na2 eosin Y-derived photoinduced states act as a HAT catalyst for the synthesis of 3,4-dihydropyrimidin-2-(1H)-ones/thiones in ethanol at room temperature. This research establishes a novel function for using a nonmetallic natural… read more here.
Keywords: na2 eosin; ones thiones; dihydropyrimidin ones; visible light ... 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
Carbazole-based photocatalyst (4CzIPN) for novel donor–acceptor (D–A) fluorophore-catalyzed visible-light-induced photosynthesis of 3,4-dihydropyrimidin-2-(1H)-ones/thiones via a proton-coupled electron transfer (PCET) process
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DOI: 10.1039/d2ra07064b
Abstract: Based on the Biginelli reaction of β-ketoesters, arylaldehydes, and urea/thiourea, we created a green radical synthesis procedure for 3,4-dihydropyrimidin-2-(1H)-ones/thiones. A PCET (proton-coupled electron transfer) photocatalyst was used in an ethanol solution in an air environment… read more here.
Keywords: ones thiones; coupled electron; electron transfer; dihydropyrimidin ones ... See more keywords
Pumice as a Novel Natural Heterogeneous Catalyst for the Designation of 3,4-Dihydropyrimidine-2-(1H)-ones/thiones under Solvent-Free Conditions
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DOI: 10.3390/molecules27186044
Abstract: In this study, pumice is used as a novel natural heterogeneous catalyst for the synthesis of 3,4-dihydropyrimidine-2-(1H)-ones/thiones via the one-pot multi-component condensation of aromatic aldehydes, urea/thiourea, and ethyl acetoacetate or acetylacetone in excellent yields (up… read more here.
Keywords: ones thiones; natural heterogeneous; dihydropyrimidine ones; catalyst ... See more keywords