Results 161 to 170 of about 1,000 (202)

Evaluation of Electrochemical Behavior and Antioxidant Activity of Seleno‐Dihydropyrimidinones and Chloro‐Dihydropyrimidinones

ChemistrySelect
Abstract Organic compounds with potential antioxidant activity have attracted special attention of researchers and they have been widely studied in several areas, including pharmacology and medicinal chemistry. In this context, electrochemistry through cyclic voltammetry becomes a fast and efficient tool for the ...
Luiz Fernando Eltz da Rosa, Matheus Henrique Oliveira de Sousa, Mário Alf da Rosa, Neusa Fernandes de Moura, Carlos R. M. Peixoto, Rômulo Faria Santos Canto, Marcelo Godoi   +6 more
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Asymmetric alkylations of n-acyl dihydropyrimidinones

Tetrahedron: Asymmetry, 1991
Abstract Enantiomerically pure dihydropyrimidin-4-one 1 has been employed as a chiral auxiliary for enantioselective alkylation reactions. Acylation of 1 , followed by enolate formation, alkylation and acyl cleavage, affords α-alkylated carboxylic acids in high chemical yield and enatiomeric purity.
George R. Negrete, Joseph P. Konopelski
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A chemo- and regio-selective three-component dihydropyrimidinone synthesis

Chemical Communications, 2007
A selective three-component coupling, involving co-condensation of aldehyde pairs with substituted ureas under Lewis acid catalysis, provides rapid access to highly functionalised dihydropyrimidinones; sulfamides react analogously.
Chris D, Bailey, Chris E, Houlden, Grégory L J, Bar, Guy C, Lloyd-Jones, Kevin I, Booker-Milburn   +4 more
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One‐Pot Construction of Dihydropyrimidinones in Ionic Liquids.

ChemInform, 2005
AbstractFor Abstract see ChemInform Abstract in Full Text.
Sushilkumar S. Bahekar, Sandip A. Kotharkar, Devanand B. Shinde   +2 more
openaire   +1 more source

Synthesis of Dihydropyrimidinones Using Large Pore Zeolites

Catalysis Letters, 2011
A series of dihydropyrimidin-2(1H)-one (DHPM) belongs to one of the important class of therapeutic and pharmacological active compound, were synthesized through the multicomponent reactions (MCRs) of aldehydes, ethyl acetoacetate and urea, followed by the heterogeneous catalyzed Biginelli reaction.
Sunil R. Mistry, Rikesh S. Joshi, Suban K. Sahoo, Kalpana C. Maheria   +3 more
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Synthesis and Antioxidant Evaluation of Dihydropyrimidinone Integrated Pyrazoles

Letters in Organic Chemistry, 2019
: A series of novel ethyl 6-[2-(3-aryl-1-phenyl-1H-pyrazol-4-yl)vinyl]-2-oxo-4-phenyl- 1,2,3,4-tetrahydropyrimidine-5-carboxylates (9a-9d) has been synthesized by adopting a multistep synthetic strategy. The structure of the targets was confirmed on the basis of physical and spectral techniques.
Krishnaraj Padmavathy, Peramasivan Sutha, Kannan G. Krishnan, Chandran U. Kumar, Shunmugam Iniyaval, Chennan Ramalingan   +5 more
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Biological activity of dihydropyrimidinone (DHPM) derivatives: A systematic review

European Journal of Medicinal Chemistry, 2018
Dihydropyrimidinones are heterocycles with a pyrimidine moiety in the ring nucleus, which, in recent decades, have aroused interest in medicinal chemistry due to alleged versatile biological activity. In this systematic review, we describe the currently published activities of dihydropyrimidinone derivatives.
Larizza Hellen Santana Matos, Flávia Teixeira Masson, Luiz Alberto Simeoni, Mauricio Homem-de-Mello   +3 more
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Efficient aerobic oxidative dehydrogenation of dihydropyrimidinones and dihydropyrimidines

Tetrahedron, 2011
Abstract 4-Substituted dihydropyrimidinones and dihydropyrimidines were first efficient aerobic oxidized to the corresponding pyrimidinones and pyrimidines, respectively, in high yields by molecular oxygen in the presence of catalytic amount of N -hydroxyphthalimide (NHPI) and Co(OAc) 2 in a mild and environmental benign condition.
Bing Han, Run-Feng Han, Yu-Wei Ren, Xiao-Yong Duan, Yi-Chuan Xu, Wei Zhang   +5 more
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ChemInform Abstract: Recent Progress in the Chemistry of Dihydropyrimidinones

ChemInform, 2010
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
I. T. Phucho, A. Nongpiur, S. Tumtin, R. Nongrum, R. L. Nongkhlaw   +4 more
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One-pot construction of dihydropyrimidinones in ionic liquids

Mendeleev Communications, 2004
The use of the ionic liquid [bmim]Cl.2AlCl3 for the preparation of dihydropyrimidinones is described.
Sushilkumar S. Bahekar, Sandip A. Kotharkar, Devanand B. Shinde   +2 more
openaire   +1 more source