Results 21 to 30 of about 4,644,920 (368)

Multicomponent reactions II [PDF]

open access: yesBeilstein Journal of Organic Chemistry, 2014
The concept of multicomponent reactions (MCR) [1] has been around in organic chemistry since the very early days. Indeed, the first example known in literature, the Strecker synthesis of α-aminonitriles [2], has been developed into an industrial process for the production of methionine in an annual scale of several hundreds of thousand tons per year ...
openaire   +6 more sources

The evaluation of chemoselectivity in multicomponent domino Knoevenagel/Diels-Alder reaction: A DFT study [PDF]

open access: yesJournal of the Serbian Chemical Society, 2021
Herein, the chemoselectivity of the multicomponent domino Knoevenagel/ Diels–Alder reaction is investigated in terms of theoretical calculations. The structures of reagents, transition states, intermediates and products are optimized at the M062X/6-31+G ...
Attarbashi Mina   +2 more
doaj   +1 more source

Sequential and direct multicomponent reaction (MCR)-based dearomatization strategies.

open access: yesChemical Society Reviews, 2020
Dearomatization strategies in a multicomponent fashion often result in complex heterocyclic frameworks, which have attracted the attention of chemists due to their natural product-like structures. The combination of these two processes can easily achieve
U. Sharma   +3 more
semanticscholar   +1 more source

Well-posedness analysis of multicomponent incompressible flow models [PDF]

open access: yes, 2020
In this paper, we extend our study of mass transport in multicomponent isothermal fluids to the incompressible case. For a mixture, incompressibility is defined as the independence of average volume on pressure, and a weighted sum of the partial mass ...
Bothe, Dieter, Druet, Pierre-Etienne
core   +4 more sources

Ethyl (E)-4-(2,4-Dimethoxyphenyl)-6-(2,4-dimethoxystyryl)-2-oxo-1,2,3,4-tetrahydropyrimidine-5-carboxylate

open access: yesMolbank, 2017
A new compound belonging to the “heterostilbene” derivative, namely ethyl (E)-4-(2,4-dimethoxyphenyl)-6-(2,4-dimethoxystyryl)-2-oxo-1,2,3,4-tetrahydropyrimidine-5-carboxylate (2), has been successfully synthesized as an unprecedented side product of the ...
Hery Suwito   +6 more
doaj   +1 more source

A Microfluidics Reaction System with Automation for a Multicomponent Reaction

open access: yesAdvanced Intelligent Systems, 2020
A multicomponent reaction is established toward quinazolimine derivatives, but it requires intensive human interventions in conventional reaction systems to suppress the side reactions. Herein, an automated microfluidics‐based reaction system that uses a
Xinlong Pang, Haoran Zhao, Shaohua Ma
doaj   +1 more source

From sequence-defined macromolecules to macromolecular pin codes [PDF]

open access: yes, 2020
Dynamic sequence-defined oligomers carrying a chemically written pin code are obtained through a strategy combining multicomponent reactions with the thermoreversible addition of 1,2,4-triazoline-3,5-diones (TADs) to indole substrates.
Badi, Nezha   +4 more
core   +1 more source

Catalyzed and non-catalyzed synthesis of bioactive monastrol

open access: yesQuímica Nova, 2014
The bioactive 3,4-dihydropyrimidin-2(1H)-thione derivative known as Monastrol was synthesized under catalyzed and non-catalyzed conditions through the Biginelli multicomponent reaction under solvent-free conditions.
Haline G. O. Alvim   +4 more
doaj   +1 more source

Tetrazoles via Multicomponent Reactions [PDF]

open access: yesChemical Reviews, 2019
Tetrazole derivatives are a prime class of heterocycles, very important to medicinal chemistry and drug design due to not only their bioisosterism to carboxylic acid and amide moieties but also to their metabolic stability and other beneficial physicochemical properties.
Constantinos G. Neochoritis   +2 more
openaire   +3 more sources

Atom- and step-economic synthesis of biaryl-substituted furocoumarins, furoquinolones and furopyrimidines by multicomponent reactions and one-pot synthesis

open access: yesGreen Processing and Synthesis, 2013
Atom-efficient multicomponent reactions (MCR) and step-efficient one-pot synthesis are developed for the synthesis of biaryl-substituted furocoumarins, furoquinolones, and furopyrimidines.
Kadam Asha   +2 more
doaj   +1 more source

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