Results 1 to 10 of about 3,194 (256)

Stereoselective Synthesis of 5-7 membered Cyclic Ethers by Deiodonative Ring-Enlargement Using Hypervalent Iodine Reagents [PDF]

open access: yesMolecules, 2005
Stereoselective synthesis of 5-7 membered cyclic ethers was achieved by deiodonative ring-enlargement of cyclic ethers having an iodoalkyl substituent.
Shoji Hara   +3 more
doaj   +2 more sources

Composition of the Solvation Shell of the Selected Cyclic Ethers (1,4-Dioxane, 12-Crown-4, 15-Crown-5 and 18-Crown-6) in a Mixture of Formamide with Water at Four Temperatures

open access: yesMolecules, 2023
The solution enthalpy of 15-crown-5 and 18-crown-6 ethers in the mixture of formamide (F) and water (W) was measured at four temperatures: 293.15 K, 298.15 K, 303.15 K, 308.15 K.
Małgorzata Jóźwiak   +3 more
doaj   +1 more source

Fabricated Gamma-Alumina-Supported Zinc Ferrite Catalyst for Solvent-Free Aerobic Oxidation of Cyclic Ethers to Lactones

open access: yesMolecules, 2023
The aim of this work was to fabricate a new heterogeneous catalyst as zinc ferrite (ZF) supported on gamma-alumina (γ-Al2O3) for the conversion of cyclic ethers to the corresponding, more valuable lactones, using a solvent-free method and O2 as an ...
Naaser A. Y. Abduh   +4 more
doaj   +1 more source

Efficient synthesis, characterization and electrochemical properties of bis(ferrocenyl) ethers

open access: yesChemistry of Inorganic Materials, 2023
Three different symmetrical ethers derived from formyl ferrocene, acetyl ferrocene and benzoyl ferrocene have been characterized via FT-IR, UV-Visible and 1H NMR spectroscopic techniques. Further, the true nature of bis[phenyl(ferrocenyl)methyl]ether was
S. Dharani   +2 more
doaj   +1 more source

Discovery of Novel Cyclic Ethers with Synergistic Antiplasmodial Activity in Combination with Valinomycin

open access: yesMolecules, 2021
With drug resistance threatening our first line antimalarial treatments, novel chemotherapeutics need to be developed. Ionophores have garnered interest as novel antimalarials due to their theorized ability to target unique systems found in the ...
Daniel J. Watson   +5 more
doaj   +1 more source

pH-Responsive Hollow Polymeric Microspheres from Irradiated Cyclic Ether Aqueous Solution

open access: yesApplied Sciences, 2021
Smart hollow polymeric microspheres have been widely applied in various fields such as controlled release, drug delivery, catalysis, and so on. Herein, a facile, green and one-step template-free method is introduced for preparing pH-responsive hollow ...
Chuhong Yu   +3 more
doaj   +1 more source

Computational insights into the spontaneity of epoxide formation from halohydrins and other mechanistic details of Williamson’s ether synthesis

open access: yesChemistry Journal of Moldova: General, Industrial and Ecological Chemistry, 2023
The reaction mechanism of several Williamson‟s ether syntheses have been studied using density functional theory with triple-ζ basis sets. These computations show that the synthesis of geometrically-strained epoxide from deprotonated halohydrins is due ...
Pedro J. Silva
doaj   +1 more source

Direct Synthesis of Bicyclic Acetals via Visible Light Catalysis

open access: yesiScience, 2020
Summary: Polysubstituted bicyclic acetals are a class of privileged pharmacophores with a unique 3D structure and an adjacent pair of hydrogen bond acceptors.
Fengjin Wu   +7 more
doaj   +1 more source

Modeling of Living Cationic Ring-Opening Polymerization of Cyclic Ethers: Active Chain End versus Activated Monomer Mechanism [PDF]

open access: yesIranian Journal of Chemistry & Chemical Engineering, 2020
Living cationic ring-opening polymerization of cyclic ethers in the presence of diol was modeled using the method of moments. A widespread kinetic model was developed based on previous experimental studies.
Mehdi Mahmoudian   +5 more
doaj   +1 more source

Herstellung von Polyestern durch ringöffnende, ionische Copolymerisation von Dicarbonsäureanhydriden und Ringäthern

open access: yesCHIMIA, 1975
For the preparation of polyesters an ionically initiated ring-opening copolymerization reaction of dicarboxylic acid anhydrides and cyclic ethers can be used beside the conventional polycondensation technique. The main advantage of this copolymerization
Karl-Heinz W. Reichert
doaj   +1 more source

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