Results 31 to 40 of about 146,224 (211)

Enaminones in a multicomponent synthesis of 4-aryldihydropyridines for potential applications in photoinduced intramolecular electron-transfer systems

Beilstein Journal of Organic Chemistry, 2012
An efficient three component reaction with enaminones, primary amines and aldehydes resulted in easy access to 1,4-dihydropyridines with different substituents at the 1-, 3-, 4- and 5-positions.
Nouria A. Al-Awadi, Maher R. Ibrahim, Mohamed H. Elnagdi, Elizabeth John, Yehia A. Ibrahim   +4 more
doaj   +1 more source

An Efficient One-Pot Three-Component Synthesis of Fused 1,4-Dihydropyridines Using HY-Zeolit

Molecules, 2009
A facile and convenient protocol was developed for the fast (2.5-3.5 h) and high yielding (70-90 %) synthesis of fused 1,4-dihydropyridines from dimedone in the presence of HY-zeolite as an efficient recyclable heterogeneous catalyst.
Khalil Tabatabaeian, Mohammad Nikpassand, Manouchehr Mamaghani   +2 more
doaj   +3 more sources

Direct Aminolysis of Ethoxycarbonylmethyl 1,4-Dihydropyridine-3-carboxylates

Molecules, 2015
The ethoxycarbonylmethyl esters of 1,4-dihydropyridines were directly converted into carbamoylmethyl esters in the presence of 1,5,7-triazabicyclo[4.4.0]dec-5-ene (TBD) in good to excellent yields under mild conditions.
Brigita Vigante, Martins Rucins, Aiva Plotniece, Karlis Pajuste, Iveta Luntena, Brigita Cekavicus, Egils Bisenieks, Rufus Smits, Gunars Duburs, Arkadij Sobolev   +9 more
doaj   +1 more source

One-pot multicomponent green Hantzsch synthesis of 1,2-dihydropyridine derivatives with antiproliferative activity

Beilstein Journal of Organic Chemistry, 2020
A rapid route for obtaining unsymmetrical 1,2-dihydropyridines (1,2-DHPs) as opposed to 1,4-dihydropyridines (1,4-DHPs) has been achieved via a one-pot multicomponent Hantzsch reaction.
Giovanna Bosica, Kaylie Demanuele, José M. Padrón, Adrián Puerta   +3 more
doaj   +1 more source

Cobalt(II)-Catalyzed C–H Alkylation of N‑Heterocycles with 1,4-Dihydropyridines

, 2022
The rapid incorporation of alkyl and acyl groups into C–H bonds of N-heterocycles is in demand for the development of lead candidates in drug discovery.
Prithwish Ghosh (7122755), In Su Kim (1433776), Jung Su Park (1449832), Neeraj Kumar Mishra (1565998), Youjung Byun (10750326), Na Yeon Kwon (6102161)   +5 more
core   +1 more source

N,N'-Ethylene-bis(benzoylacetoniminato) Copper (II), Cu(C22H22N2O2), a New Reagent for Aromatization of Hantzsch 1,4-Dihydropyridines

Molecules, 2007
A variety of Hantzsch 1,4-dihydropyridines were oxidized to their corresponding pyridines in high yields in the presence of Cu(C22H22N2O2) in refluxing acetic acid.
Majid M Heravi, Saeed Dehghanpour, Fatemeh Derikvand   +2 more
doaj   +1 more source

Hantzsch Reaction Starting Directly from Alcohols through a Tandem Oxidation Process

Journal of Chemistry, 2017
A Brønsted acidic ionic liquid, 3-(N,N-dimethyldodecylammonium) propanesulfonic acid hydrogen sulphate ([DDPA][HSO4]), has been successfully applied to catalyze sequential oxidation of aromatic alcohols with NaNO3 followed by their condensation with ...
Xiaobing Liu, Bin Liu
doaj   +1 more source

Hantzsch-Type Dihydropyridines and Biginelli-Type Tetra-hydropyrimidines: A Review of their Chemotherapeutic Activities

Journal of Pharmacy & Pharmaceutical Sciences, 2015
Years after the first report on 1,4-dihydropyridines (1,4-DHPs) and 1,2,3,4-tetrahydropyrimidines (1,2,3,4-THPMs) appeared, they  are revisited as plausible therapeutic agents.
Saghi Sepehri, Horacio Perez Sanchez, Afshin Fassihi   +2 more
doaj   +1 more source

An efficient Hantzsch synthesis of 1,4-dihydropyridines using p-toluenesulfonic acid under solvent-free condition [PDF]

Maejo International Journal of Science and Technology, 2014
An efficient Hantzsch synthesis of various substituted 1,4-dihydropyridines from an aldehyde, a β-dicarbonyl compound and ammonium acetate using p-toluenesulfonic acid in a solvent-free condition in the absence of any other co ...
Masoud Nasr-Esfahani , Morteza Montazerozohori , Razieh Raeatikia   +2 more
doaj   +1 more source

Evaluation of the reaction mechanism between 1,4-dihydropyridines and α,β-unsaturated nitriles. [PDF]

, 2022
Hydride transfer reactions involving 1,4-dihydropyridines play a central role in bioorganic chemistry as they represent an important share of redox metabolism.
Esteban, Vöhringer-Martinez, David Adrian, Saez, Stefan, Vogt-Geisse   +2 more
core   +2 more sources