Results 21 to 30 of about 393 (166)

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

Beilstein 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

DES-Promoted Synthesis of 3,4-Dihydropyrimidinones and Their Antidiabetic and Antioxidant Evaluation Supported With Computational Studies. [PDF]

Chem Biodivers
DES‐promoted synthesis and antidiabetic evaluation of 3,4‐dihydropyrimidinones and their complementation with computational studies are reported. ABSTRACT A series of 3,4‐dihydropyrimidinone (DHPM) derivatives was synthesized using a green deep eutectic solvent (DES) system composed of ZnCl2 and urea, which acted simultaneously as solvent, catalyst ...
Kumar G, Mishra S, Seboletswe P, Gcabashe N, Gummidi L, Manhas N, Makhanya T, Bhargava G, Idris A, Islam MS, Singh P.   +10 more
europepmc   +2 more sources

Multigram-Scale Organic Synthesis by Resonant Acoustic Mixing: Application to the Sustainable Preparation of Active Pharmaceutical Ingredients. [PDF]

ChemSusChem
Knoevenagel condensation, Biginelli three‐component reaction and benzylic rearrangement are investigated at multi‐gram scale, by resonance acoustic mixing (RAM), to prepare biologically active molecules, also including the marketed Phenytoin (antiepileptic drug). Chem21 and DOZN 3.0 tools were used to assess the greenness of the RAM‐assisted syntheses,
Chatzigiannis CM, Scalzullo SM, Colacino E, Rivas ME.   +3 more
europepmc   +2 more sources

The role of phosphotungstic acid in enhancing the catalytic performance of UiO-66 (Zr) and its applications as an efficient solid acid catalyst for coumarins and dihydropyrimidinones synthesis

Catalysis Communications, 2022
In recent study, we report a facile and easy technique for the synthesis phosphotungstic acid (PTA) with different weight contents (10, 25, 50 and 75 wt%) loaded on UiO-66 (Zr) as efficient and reusable catalysts for the preparation of coumarin and ...
Fares T. Alshorifi, Dina E. Tobbala, Salah M. El-Bahy, Mohamed A. Nassan, Reda S. Salama   +4 more
doaj   +1 more source

Oxidative Dehydrogenation of Dihydropyrimidinones and Dihydropyrimidines [PDF]

Organic Letters, 2005
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Kana, Yamamoto, Ye Grace, Chen, Frédéric G, Buono   +2 more
openaire   +2 more sources

Novel Dihydropyrimidinone Derivatives as Potential P-Glycoprotein Modulators [PDF]

ACS Omega, 2022
P-glycoprotein (Pgp), an ATP binding cassette (ABC) transporter, is an ATP-dependent efflux pump responsible for cancer multidrug resistance. As part of efforts to identify human Pgp (hPgp) inhibitors, we prepared a series of novel triazole-conjugated dihydropyrimidinones using a synthetic approach that is well suited for obtaining compound libraries ...
Sabera Bijani, Faraz Shaikh, Sheefa Mirza, Shirley Weng In Siu, Nayan Jain, Rakesh Rawal, Nigel G. J. Richards, Anamik Shah, Ashish Radadiya   +8 more
openaire   +2 more sources

Bis-bromine-1,4-diazabicyclo[2.2.2]octane Complex (DABCO-Br2): An Efficient and Versatile Reagent for Preparation of Dihydropyrimidinones as a New Protocol for the Biginelli Reaction [PDF]

شیمی کاربردی روز, 2011
A simple and efficient method for the one-pot Biginelli condensation reaction of aldehydes, β-dicarbonyl compounds and urea or thiourea employing tetrameric DABCO-bromine as a novel catalyst is described.
Gholam Hossein Mahdavinia, Mohammad Ali Bigdeli, Samaneh Karimi, Fatemeh Koti   +3 more
doaj   +1 more source

Biochar-Based Graphitic Carbon Nitride Adorned with Ionic Liquid Containing Acidic Polymer: A Versatile, Non-Metallic Catalyst for Acid Catalyzed Reaction

Molecules, 2020
A novel biochar-based graphitic carbon nitride was prepared through calcination of Zinnia grandiflora petals and urea. To provide acidic and ionic-liquid functionalities on the prepared carbon, the resultant biochar-based graphitic carbon nitride was ...
Samahe Sadjadi, Fatemeh Koohestani, Majid Heravi   +2 more
doaj   +1 more source

Synthesis of Quinazolin‐2,4,6‐triamine Derivatives as Non‐purine Xanthine Oxidase Inhibitors and Exploration of Their Toxicological Potential**

ChemMedChem, Volume 18, Issue 20, October 17, 2023., 2023
One quinazolin‐2,4,6‐triamine derivative was found to be a better bovine xanthine oxidase (bXO) inhibitor than allopurinol. Three quinazoline derivatives were not micronuclei inducers in a murine model. Three quinazolin‐2,4,6‐triamine derivatives acted as superoxide scavengers, and one 5,6‐dihydro‐3H‐pirimidin‐4‐one showed bXO inhibitory activity ...
Marcela A. Lopez‐Sanchez, María del Carmen Garcia‐Rodriguez, Rodrigo Aguayo‐Ortiz, Estefani Hernandez‐Cruz, Diego I. Figueroa‐Figueroa, Francisco Hernandez‐Luis   +5 more
wiley   +1 more source

Decoding Urease Inhibition: A Comprehensive Review of Inhibitor Scaffolds. [PDF]

ChemMedChem
Representative functional groups known for urease inhibition are reviewed within diverse scaffolds using structure–activity analyses to identify features associated with high inhibitory activity. Urease is a metalloenzyme produced by a wide range of organisms and plays a critical role in nitrogen microbial metabolism by catalyzing the hydrolysis of ...
Martinho N, Aniceto N.
europepmc   +2 more sources