Results 1 to 10 of about 303,088 (168)

The preparation of " salicylic acid azo 2,2,4,4 tetrahydroxybenzophenon" dye using Dowex in the acidic form as a catalyst

open access: yesTikrit Journal of Pure Science, 2023
The preparation of azo dye derivative  from " p- amino Salicylic acid " through preparation diazonium salt from aromatic amine followed by coupling reaction with (2,2,4,4-tetrahydroxybenzophenonto) was carried out to give (salicylic acid azo 2,2,4,4 ...
Ammar A. Dawood   +2 more
doaj   +1 more source

Trichloroacetimidate-Triggered Expeditious and Novel Synthesis of N-Acylbenzotriazoles

open access: yesSynOpen, 2021
A facile route for the synthesis of a diverse range of N-acylbenzotriazole derivatives from the corresponding carboxylic acids has been established through a carbonyl activation pathway.
Mangal S. Yadav   +3 more
doaj   +1 more source

Magnetic-Core–Shell–Satellite Fe3O4-Au@Ag@(Au@Ag) Nanocomposites for Determination of Trace Bisphenol A Based on Surface-Enhanced Resonance Raman Scattering (SERRS)

open access: yesNanomaterials, 2022
As a typical representative of endocrine-disrupting chemicals (EDCs), bisphenol A (BPA) is a common persistent organic pollutant in the environment that can induce various diseases even at low concentrations.
Jie Huang   +8 more
doaj   +1 more source

Autocatalysis in Eschenmoser Coupling Reactions [PDF]

open access: yesChemistry – A European Journal, 2023
AbstractThe Eschenmoser coupling reaction (ECR) of thioamides with electrophiles is believed to proceed via thiirane intermediates. However, little is known about converting the intermediates into ECR products. Previous mechanistic studies involved external thiophiles to remove the sulfur atom from the intermediates.
DUEZ, Quentin   +4 more
openaire   +5 more sources

N-Heterocyclic Carbene Silver Complex Modified Polyacrylonitrile Fiber/MIL-101(Cr) Composite as Efficient Chiral Catalyst for Three-Component Coupling Reaction

open access: yesNanomaterials, 2022
Complex asymmetric synthesis can be realized by the chiral induction of amino acids in nature. It is of great significance to design a new biomimetic catalytic system for asymmetric synthesis.
Ningning Xin   +8 more
doaj   +1 more source

Copper-Catalyzed Difluoroalkylation Reaction

open access: yesMolecules, 2022
This review describes recent advances in copper-catalyzed difluoroalkylation reactions. The RCF2 radical is generally proposed in the mechanism of these reactions.
Dao-Qing Dong   +12 more
doaj   +1 more source

Copper-Catalyzed S-Arylation of Thiols Using KF/Al2O3 [PDF]

open access: yesشیمی کاربردی روز, 2014
Copper-catalyzed S-arylation of thiols can be accomplished using air-stable CuI as a copper source and 1,10-phenanthroline as a ligand in the presence of KF/Al2O3 as a suitable base.
Rahman Hosseinzadeh   +3 more
doaj   +1 more source

Simple Synthesis of Modafinil Derivatives and Their Anti-inflammatory Activity

open access: yesMolecules, 2012
Simple synthesis of modafinil derivatives and their biological activity are described. The key synthetic strategies involve substitution and coupling reactions. We determined the anti-inflammatory effects of modafinil derivatives in cultured BV2 cells by
Mankil Jung   +5 more
doaj   +1 more source

CuI-Catalyzed Coupling Reactions of 4-Iodopyrazoles and Alcohols: Application toward Withasomnine and Homologs

open access: yesMolecules, 2021
The direct 4-alkoxylation of 4-iodo-1H-pyrazoles with alcohols was achieved by a CuI-catalyzed coupling protocol. The optimal reaction conditions employed excess alcohol and potassium t-butoxide (2 equiv) in the presence of CuI (20 mol%) and 3,4,7,8 ...
Yoshihide Usami   +10 more
doaj   +1 more source

Coupling Reactions

open access: yesChemInform, 2006
AbstractFor Abstract see ChemInform Abstract in Full Text.
Mecking, Stefan, Schlotterbeck, Ulf
openaire   +2 more sources

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