Results 11 to 20 of about 8,172 (292)

Efficient synthesis of benzothiazine and acrylamide compounds [PDF]

open access: yesQuímica Nova, 2010
This article describes the synthesis of the new (2Z)-2-(4-methoxybenzylidene)-6-nitro-4H -benzo[1,4]thiazin-3-one, (2Z)-2-(4-methoxybenzylidene)-4-methyl-6-nitro-4H-benzo[1,4]thiazin-3-one, (2Z)-6-amino-2-(4-methoxybenzylidene)-4H -benzo[1,4]thiazin-3 ...
Ana Maria Alves Souza   +8 more
doaj   +4 more sources

Divergent rhodium-catalyzed electrochemical vinylic C–H annulation of acrylamides with alkynes

open access: yesNature Communications, 2021
α-Pyridones and α-pyrones are ubiquitous structural motifs found in natural products and components of biologically active small molecules. Here, the authors report an oxidant-free Rh-catalyzed electrochemical divergent vinylic C–H annulation of ...
Qi-Liang Yang   +2 more
exaly   +2 more sources

Electrochemical selective hydrocarboxylation of acrylamides with carbon dioxide for precise control of α- and β-carboxylation [PDF]

open access: yesCommunications Chemistry
The hydrocarboxylation of acrylate with carbon dioxide (CO2) have been achieved through metal-catalysis, photochemistry catalysis or electrochemistry catalysis in recent years.
Xiuli Zhao   +11 more
doaj   +2 more sources

Hydrazine Derivatives as C-Centered Radical Precursors for C-C Bond Formation Reactions [PDF]

open access: yesMolecules
Organic monosubstituted hydrazine derivatives (Ar-NHNH2, RC(O)-NHNH2, Alkyl-NHNH2) are synthetically available, atom-efficient and stable sources of C-centered radicals upon oxidation with extrusion of the energetically favorable N2 molecule. This review
Elena R. Lopat’eva   +2 more
doaj   +2 more sources

The regioselective synthesis of spirooxindolo pyrrolidines and pyrrolizidines via three-component reactions of acrylamides and aroylacrylic acids with isatins and α-amino acids

open access: yesBeilstein Journal of Organic Chemistry, 2014
The regioselective three-component condensation of azomethine ylides derived from isatins and α-amino acids with acrylamides or aroylacrylic acids as dipolarophiles has been realized through a one-pot 1,3-dipolar cycloaddition protocol.
Victoria V Lipson, Alexander S Karpenko
exaly   +2 more sources

Hydrocyclization/Defluorination of CF3‐Substituted Acrylamides: Insights from Kinetics of Hydrogen Atom Transfer [PDF]

open access: yesAdvanced Science
The introduction of F‐containing groups into organic molecules can significantly alter their physical and chemical properties. Particularly, gem‐difluoroalkenes serve as versatile precursors for a broad variety of organofluorine compounds, commonly used ...
Yanjun Wan, Ronghui Shao, Jack R. Norton
doaj   +2 more sources

Facile and Practical Synthesis of Substituted Piperidine‐2,6‐Diones Under Transition‐Metal Free Condition [PDF]

open access: yesChemistryOpen
Substituted piperidine‐2,6‐diones are privileged scaffolds in numerous bioactive molecules and their facile and practical preparation still remains unsolved.
Yue‐Hua Liu   +7 more
doaj   +2 more sources

Structural Origin of the Fast Polymerization Rates and Monomer Universality of Pyrazole-Based Photoiniferters [PDF]

open access: yesMolecules
Herein, we report a combined computational and experimental investigation into the recently reported universal pyrazole-based reversible addition-fragmentation chain transfer (RAFT) agents (Z−C(=S)−S−R, where Z is 3,5-dimethyl-1H-pyrazol-1-yl), which can
Bo Wang   +5 more
doaj   +2 more sources

Laboratory Study of the Application of a Novel Bio-Based Polymer to Synthesize Aphron Drilling Fluids [PDF]

open access: yesJournal of Petroleum Science and Technology, 2022
Aphron fluids are a special type of foam in which the gas bubble (air or any other gas) is surrounded by a double-walled layer consisting of surfactant and polymer.
Omid Sharifi   +3 more
doaj   +1 more source

Synthesis and Characterization of Catechol-Containing Polyacrylamides with Adhesive Properties

open access: yesMolecules, 2022
In this study, a row of four analogous dopamine acryl- and methacrylamide derivatives, namely N-(3,4-dihydroxyphenyethyl) acrylamide, N-(3,4-dihydroxyphenyethyl) meth acrylamide, N-phenethyl methacrylamide, N-(4-hydroxyphenethyl) methacrylamide were ...
Kathleen Hennig, Wolfdietrich Meyer
doaj   +1 more source

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