Results 131 to 140 of about 971 (170)

The Biginelli Reaction Is a Urea-Catalyzed Organocatalytic Multicomponent Reaction

The Journal of Organic Chemistry, 2015
The recently developed artificial force induced reaction (AFIR) method was applied to search systematically all possible multicomponent pathways for the Biginelli reaction mechanism. The most favorable pathway starts with the condensation of the urea and benzaldehyde, followed by the addition of ethyl acetoacetate.
Maneeporn, Puripat, Romain, Ramozzi, Miho, Hatanaka, Waraporn, Parasuk, Vudhichai, Parasuk, Keiji, Morokuma   +5 more
openaire   +2 more sources

New catalysts of Biginelli reaction

Russian Journal of Organic Chemistry, 2007
A synthesis was developed of new imidazole derivatives catalyzing three-component condensation of ethyl acetoacetate, aromatic aldehydes, and urea(or thiourea) by Biginelli reaction.
F. Makaev, E. Styngach, V. Muntyanu, S. Pogrebnoi, Z. Rybkovskaya, A. Barba   +5 more
openaire   +1 more source

2-Acylthioacetamides in the Biginelli Reaction

Chemistry of Heterocyclic Compounds, 2014
We have demonstrated for the first time a Biginelli reaction of 2-acylthioacetamides with aromatic aldehydes and ureas or thioureas, leading to N-Ar1-4-Ar2-6-R1-1-R2-2-oxo(thioxo)-1,2,3,4-tetrahydro-pyrimidine-5-carbothioamides. The regioselectivity of this process matched the concept of hard/soft Lewis acids and bases.
M. N. Kurmach, A. B. Ryabitskiy, V. N. Britsun   +2 more
openaire   +1 more source

ChemInform Abstract: Biginelli Reaction

ChemInform, 2008
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 of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
Anil Saini, Sanjay Kumar, Jagir S. Sandhu   +2 more
openaire   +1 more source

2-Acylmethyl-1H-benzimidazoles in the Biginelli Reaction

Chemistry of Heterocyclic Compounds, 2003
AbstractFor Abstract see ChemInform Abstract in Full Text.
I. B. Dzvinchuk, T. V. Makitruk, M. O. Lozinskii   +2 more
openaire   +1 more source

Dichloroacetylaroylmethanes as two-carbon synthons in the Biginelli reaction

Chemistry of Heterocyclic Compounds, 2006
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.
V. A. Mamedov, L. V. Mustakimova, A. T. Gubaidullin, S. V. Vdovina, I. A. Litvinov, V. S. Reznik   +5 more
openaire   +1 more source

Biginelli Reaction: Polymer Supported Catalytic Approaches

ACS Combinatorial Science, 2019
The Biginelli product, dihydropyrimidinone (DHPM) core, and its derivatives are of immense biological importance. There are several methods reported as modifications to the original Biginelli reaction. Among them, many involve the use of different catalysts.
Rajendra V. Patil, Jagdish U. Chavan, Dipak S. Dalal, Vaishali S. Shinde, Anil G. Beldar   +4 more
openaire   +2 more sources

Multicomponent Combinatorial Polymerization via the Biginelli Reaction

Journal of the American Chemical Society, 2016
A multicomponent combinatorial polymerization method has been exploited as a new intersection between combinatorial chemistry, polymer chemistry, and organic chemistry. The tricomponent Biginelli reaction has been employed as a model multicomponent reaction (MCR) to efficiently prepare a library of polycondensates with continuously changed chain ...
Haodong, Xue, Yuan, Zhao, Haibo, Wu, Zilin, Wang, Bin, Yang, Yen, Wei, Zhiming, Wang, Lei, Tao   +7 more
openaire   +2 more sources

Nebivolol nanoparticles: a first catalytic use in Biginelli and Biginelli-like reactions

Canadian Journal of Chemistry, 2018
Herein, we report the catalytic activity of nebivolol nanoparticles a novel organocatalyst for the synthesis of DHPMs and DHPM-5-carboxamides. The nanoparticles are confirmed by DSC, TEM, AFM, and IR spectroscopy. The catalyst can be readily recovered and reused for the next four runs without any significant impact on the yields of the products.
Anamika Khaskel, Pranjit Barman, Subir Kumar Maiti, Utpal Jana   +3 more
openaire   +1 more source

New potential of the classical Biginelli reaction

Russian Chemical Reviews, 2008
The published data on the Biginelli reaction are generalised and systematised. The major attention is focused on the publications of the last seven years. Possible reaction mechanisms and its application for the synthesis of 3,4-dihydropyrimidin-2(1H)-one derivatives are considered. Examples of rare versions of this reaction are given.
S V Vdovina, Vakhid A Mamedov
openaire   +1 more source