Results 51 to 60 of about 11,763 (223)

Phosgene-free preparation of primary carbamates and Boc-protection of amine using H2SO4-Silica under solvent free conditions [PDF]

open access: yesشیمی کاربردی روز, 2014
An efficient and mild method for the preparation of primary carbamate from alcohols and phenols using sodium cyanate and Boc-protection of amine in the presence of H2SO4-Silica was demonstrated.
Seied Ali Pourmousavi, Maryam Hasani
doaj   +1 more source

Fabrication and Characterization of a Modified Conjugated Molecule-Based Moderate-Temperature Curing Epoxy Resin System

open access: yesFrontiers in Materials, 2020
A 2-Methylimidazole derivative [ethyl glycidyl ether (EGE)–2-MI] was synthesized through the reaction of EGE with the conjugated molecule 2-MI. The structure was confirmed by Fourier transform infrared spectroscopy, 1H-nuclear magnetic resonance ...
Liu Ding   +3 more
doaj   +1 more source

Crucial Role of Oxidation for the Prebiotic Peptide Elongation Promoted by Carbonyl Sulfide

open access: yesEuropean Journal of Organic Chemistry, Volume 29, Issue 1, January 12, 2026.
The prebiotic activation of amino acid (AA) into peptides via N‐carboxyanhydride (NCA), promoted by carbonyl sulfide (COS), cannot proceed without an oxidizing step (enabling better leaving groups than sulfur dianion). While being efficient even at mild pH the prebiotic scope of COS promoted activation of AA, it is however limited because side ...
Alexandre Desfoux   +4 more
wiley   +1 more source

METHOD OF FLUORIMETRIC DETERMINATION OF POTASSIUM CYANATE IN CARBAMYLATED DARBEPOIETIN ALPHA DRUG SUBSTANCE

open access: yesРазработка и регистрация лекарственных средств, 2019
Method of determination of potassium cyanate in carbamylated darbepoietin alpha drug substance was developed. The method is based on derivatization of cyanate by methyl ester of anthranilic acid followed by formation bicyclic derivative (1-H,3-H ...
A. D. Askretkov   +2 more
doaj  

Synthesis of Lewis Acid‐Base Adducts Between PCO− and Group 13 Lewis Acids

open access: yesZeitschrift für anorganische und allgemeine Chemie, Volume 652, Issue 1, January 6, 2026.
Lewis acid–base adducts [Na(18c6)(L)][PCO(EMe3)] (L = THF or 1,4‐dioxane; E = Ga, In) were obtained from the reactions of [Na(18c6)PCO] and trimethyltriels (EMe3 (E = Ga, In) and examined by NMR spectroscopy, IR spectroscopy, elemental analysis, and X‐ray structure analysis.
Kevin Dollberg   +9 more
wiley   +1 more source

cyanates

open access: yes, 2014
Citation: 'cyanates' in the IUPAC Compendium of Chemical Terminology, 3rd ed.; International Union of Pure and Applied Chemistry; 2006. Online version 3.0.1, 2019. 10.1351/goldbook.C01485 • License: The IUPAC Gold Book is licensed under Creative Commons Attribution-ShareAlike CC BY-SA 4.0 International for individual terms.
openaire   +1 more source

The Chemistry of Subphthalocyanines: Synthetic Strategies for their Axial, Peripheral, and Remote Postfunctionalization

open access: yesChemistryEurope, Volume 4, Issue 1, January 2026.
From axial and peripheral reactivity to remote derivatization, the chemical versatility of subphthalocyanines (SubPcs) renders them ideal scaffolds for the design of advanced functional materials. This review assembles the synthetic toolbox, key reaction conditions, and future challenges in SubPc functionalization, guiding the development of next ...
Marta Gómez‐Gómez   +4 more
wiley   +1 more source

Growth and nitrogen uptake kinetics in cultured Prorocentrum donghaiense.

open access: yesPLoS ONE, 2014
We compared growth kinetics of Prorocentrum donghaiense cultures on different nitrogen (N) compounds including nitrate (NO3-), ammonium (NH4+), urea, glutamic acid (glu), dialanine (diala) and cyanate. P.
Zhangxi Hu   +3 more
doaj   +1 more source

Photoelectrochemical Coupling of Waste‐Nitrogen Oxidation Reactions with Hydrogen Evolution for Sustainable Energy Conversion

open access: yesChemSusChem, Volume 19, Issue 1, January 2026.
Photoelectrochemical (PEC) cells utilize alternative oxidation pathways, allowing for the production of high‐value products, including N2, CO2, and nitrates. Key advantages include innovative catalyst design, improved charge separation, reduced energy input, and economic viability.
Maheswari Arunachalam   +3 more
wiley   +1 more source

Renoprotective Effect of Coix lachryma‐jobi L. Seed Polysaccharides in Adenine‐Induced Chronic Renal Failure by Blocking Gut Urea Metabolism

open access: yesFood Frontiers, Volume 7, Issue 1, January 2026.
ABSTRACT Dietary soluble fiber may alleviate renal damage in chronic kidney disease (CKD) by promoting intestinal urea excretion, though the underlying mechanisms remain unclear. This study investigated the digestion, fermentation, and renoprotective effects of Coix lachryma‐jobi L.
Hongmei Yin   +9 more
wiley   +1 more source

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