Results 11 to 20 of about 4,540 (259)

Defect-rich MOF-303 as a dual acid–base heterogeneous catalyst for the one-pot Biginelli synthesis of dihydropyrimidinones [PDF]

open access: yesScientific Reports
Bifunctional MOF-303 (Al) exhibits promising catalytic activity for the Biginelli reaction. However, its intrinsic microporosity may hinder reactant and product diffusion and reducing efficiency. Introducing defects is crucial for enhancing its catalytic
Nuhaa Shaheed, Ahmad Shaabani
doaj   +2 more sources

Magnetic core–shell Carrageenan moss/Fe3O4: a polysaccharide-based metallic nanoparticles for synthesis of pyrimidinone derivatives via Biginelli reaction [PDF]

open access: yesChemistry Central Journal, 2018
Magnetically recoverable polysaccharide-based metallic nanoparticles Carrageenan moss/Fe3O4 (Fe3O4@CM) was tested for the synthesis of Pyrimidinone derivatives via Biginelli reaction under reflux conditions in Water. Interestingly, Fe3O4@CM prepared from
Hossein Mohammad Zaheri   +4 more
doaj   +2 more sources

Synthesis of 3,4-dihydropyrimidines and octahydroquinazolinones by SBA-15 supported schiff-base iron (III) complex as durable and reusable catalyst under ultrasound irradiation [PDF]

open access: yesScientific Reports
Biginelli-type heterocyclic compounds are particularly important due to their several chemical reactivities and various range of pharmacological activity.
Zeynab Balali   +2 more
doaj   +2 more sources

A copper-doped ZIF-8: a high-performance catalyst for eco-friendly Ullmann and Biginelli reactions [PDF]

open access: yesScientific Reports
Metal-organic frameworks (MOFs) with high porosity have gained significant interest in organic reactions. In this study, copper-doped ZIF-8 (Cu-ZIF-8) was synthesized at room temperature, followed by oven drying at 60 °C, and subsequently employed as a ...
Zahra Doraghi   +2 more
doaj   +2 more sources

An Improved Protocol for Biginelli Reaction

open access: diamondGreen and Sustainable Chemistry, 2013
[Hmim][Tfa] was used as catalyst for the Biginelli reaction under microwave heating. Low catalyst loading, reduced reaction time and operational simplicity are the main highlights of this protocol. The proposed protocol was found active in the synthesis of 30 different biologically active compounds.
Vivek Srivastava
openalex   +3 more sources

O,S,Se-containing Biginelli products based on cyclic β-ketosulfone and their postfunctionalization [PDF]

open access: yesBeilstein Journal of Organic Chemistry
A one-pot three-component Biginelli synthesis of dihydropyrimidinones/thiones/selenones via acetic acid or solvent-free Yb(OTf)3-catalyzed tandem reaction of β-ketosulfone (dihydro-2H-thiopyran-3(4H)-one-1,1-dioxide), an appropriate urea, and ...
Kateryna V. Dil, Vitalii A. Palchykov
doaj   +2 more sources

Synthesis of diverse dihydropyrimidine-related scaffolds by fluorous benzaldehyde-based Biginelli reaction and post-condensation modifications [PDF]

open access: yesBeilstein Journal of Organic Chemistry, 2011
Dihydropyrimidinones and dihydropyrimidinethiones generated from the Biginelli reactions of perfluorooctanesulfonyl-attached benzaldehydes are used as common intermediates for post-condensation modifications such as cycloaddition, Liebeskind–Srogl ...
Bruno Piqani, Wei Zhang
doaj   +2 more sources

Anticancer Polymers via the Biginelli Reaction [PDF]

open access: yesACS Macro Letters, 2020
We developed a polymer-drug strategy to explore anticancer polymers. A series of monomers containing groups with potential anticancer activity have been facilely prepared through the Biginelli reaction. These monomers were used to produce water-soluble polymers through convenient radical copolymerization.
Yongsan Li   +6 more
openaire   +4 more sources

Ultrasound-assisted one-pot synthesis of dihydropyrimid-2-one/thiones catalyzed by zirconyl chloride hexahydrate [PDF]

open access: yesمجلة التربية والعلم, 2013
Different substituted dihydropyrimidinones and  dihydropyrimidin thiones were generated from the Biginelli reaction between aromatic aldehydes, 1,3-dicarbonyl and urea or thiourea under ultrasonic irradiation method.
Omar Yahya, Badie Ahmed, Imad Thanoon
doaj   +1 more source

Home - About - Disclaimer - Privacy