Results 21 to 30 of about 3,167 (267)

Natural Surfactant Mediated Synthesis of 4-Aryl Substituted 3,4-Dihydropyrimidinones

open access: diamondAsian Journal of Chemistry, 2023
Present work describes the synthesis of 4-aryl substituted 3,4-dihydropyrimidinones (DHPMs) using aqueous extract of pericarp of Sapindus trifoliatus fruit as a green catalyst.
Santosh Pore
openalex   +3 more sources

A green approach for the multicomponent synthesis of polyhydroquinolines and 6-unsubstituted dihydropyrimidinones using novel highly proficient acidic ionic liquid [CEMIM][MSA] as a reusable catalyst

open access: yesCatalysis Communications, 2022
Carboxylic acid functionalized imidazolium based novel acidic ionic liquid [CEMIM][MSA] was synthesized using economically feasible raw materials under very mild condition.
Priyanka Patil   +3 more
doaj   +2 more sources

Novel racemic tetrahydrocurcuminoid dihydropyrimidinone analogues as potent acetylcholinesterase inhibitors

open access: greenBioorganic & Medicinal Chemistry Letters, 2013
The synthesis of racemic tetrahydrocurcumin- (THC-), tetrahydrodemethoxycurcumin- (THDC-) and tetrahydrobisdemethoxycurcumin- (THBDC-) dihydropyrimidinone (DHPM) analogues was achieved by utilizing the multi-component Biginelli reaction in the presence of copper sulphate as a catalyst.
Sarawalee Arunkhamkaew   +4 more
openalex   +3 more sources

Diverse Methods with Stereoselective Induction in the Asymmetric Biginelli Reaction [PDF]

open access: yesMolecules
The relevance of the asymmetric Biginelli reaction (ABR) has been increased in this century, due to the pharmacological application of its products. This review focuses predominantly on articles published in the period from 2015 to 2024 on asymmetric ...
Marcos Díaz-Fernández   +5 more
doaj   +2 more sources

Ultrasound Assisted One-pot Synthesis of Dihydropyrimidinones Using Holmium Chloride As Catalyst [PDF]

open access: greenJournal of Sciences, Islamic Republic of Iran, 2015
A simple and green chemical procedure was reported for the synthesis of dihydropyrimidinones from various aldehydes, ethyl acetoacetate and urea or thiourea using  holmium chloride as catalyst.
S. Kakaei, H. Sid Kalal, H. Hoveidi
doaj   +1 more source

Dihydropyrimidinone Based Chromones as New α‐Glucosidase Inhibitors

open access: yesChemistrySelect
Abstract This study assesses newly synthesized chromones with a 3,4‐dihydropyrimidin‐2(1H)‐one core at C‐3, combined with triazole derivatives for their antidiabetic potential. Compounds 5a and 5b showed strong inhibition of α ...
Kumara Swamy Taviti   +6 more
openaire   +2 more sources

Lithium-Acetate-Mediated Biginelli One-Pot Multicomponent Synthesis under Solvent-Free Conditions and Cytotoxic Activity against the Human Lung Cancer Cell Line A549 and Breast Cancer Cell Line MCF7 [PDF]

open access: yesThe Scientific World Journal, 2012
Various Biginelli compounds (dihydropyrimidinones) have been synthesized efficiently and in high yields under mild, solvent-free, and eco-friendly conditions in a one-pot reaction of 1,3-dicarbonyl compounds, aldehydes, and urea/thiourea/acetyl thiourea ...
Harshita Sachdeva, Diksha Dwivedi
doaj   +4 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

Multicomponent Biginelli's synthesis of 3,4-dihydropyrimidin-2(1H)-ones promoted by SnCl2.2H2O [PDF]

open access: yesJournal of the Brazilian Chemical Society, 2004
The ability of SnCl2.2H2O as catalyst to promote the Biginelli three-component condensation reaction from a diversity of aromatic aldehydes, ethyl acetoacetate and urea or thiourea is described.
Russowsky Dennis   +5 more
doaj   +2 more sources

Antioxidant Compounds in the Treatment of Alzheimer's Disease: Natural, Hybrid, and Synthetic Products. [PDF]

open access: yesEvid Based Complement Alternat Med, 2023
Alzheimer’s disease (AD) which is associated with cognitive dysfunction and memory lapse has become a health concern. Various targets and pathways have been involved in AD’s progress, such as deficit of acetylcholine (ACh), oxidative stress, inflammation, β‐amyloid (Aβ) deposits, and biometal dyshomeostasis.
Hatami M   +5 more
europepmc   +2 more sources

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