Results 21 to 30 of about 3,194 (256)

Electrochemical Oxidation of Catechol in the Presence of some Azacrown Ethers and Transition Metal Ions in Acetonitrile

International Journal of Electrochemical Science, 2009
The electrochemical oxidation of catechol (H2Q) (1) has been studied in the absence and presence of 1,10.diaza-18-crown-6 (DA18C6) (2a), 1,7-diaza-15-crown-5 (DA15C5) (2b) and aza-15-crown-5 (A15C5) (2c) and also, in the presence of some transition metal
Davood Nematollahi, Leila Mohammadi-Behzad   +1 more
doaj   +1 more source

The hydrolysis of geminal ethers: a kinetic appraisal of orthoesters and ketals

Beilstein Journal of Organic Chemistry, 2016
A novel approach to protecting jet fuel against the effects of water contamination is predicated upon the coupling of the rapid hydrolysis reactions of lipophilic cyclic geminal ethers, with the concomitant production of a hydrophilic acyclic ...
Sonia L. Repetto, James F. Costello, Craig P. Butts, Joseph K. W. Lam, Norman M. Ratcliffe   +4 more
doaj   +1 more source

Two-step degradable ABAC-type periodic poly(cyclic acetal)s synthesized by sequence-programmed monomer formation and subsequent polyaddition based on cyclotrimerization of one vinyl monomer and two aldehydes

Giant, 2023
ABAC-type periodic poly(cyclic acetal)s were synthesized via a two-step method consisting of the synthesis of a sequence-programmed cyclic trimers from one vinyl monomer and two bifunctional aldehydes (isophthalaldehyde or terephthalaldehyde) and the ...
Tadashi Naito, Arihiro Kanazawa, Sadahito Aoshima   +2 more
doaj   +1 more source

Copper-Catalyzed Direct Allenylation of Inactive Cyclic Ethers

, 2021
We report here a direct allenylation reaction of inactive cyclic ethers. The reaction proceeds through a copper-catalyzed 1,4-difunctionalization of 1,3-enynes, with cyano group installed at the allenes simultaneously.
Zhi-Jie Niu, Yichuan Zhao, Jin-Lin Wang, Yichuan Zhao (9601603), Jin-Lin Wang (7554605), Zhi-Jie Niu (3545387), Xue-Yuan Liu (553967), Xue-Yuan Liu, Xue-Song Li, Zhe Zhang (81603), Zhe Zhang, Xue-Song Li (2188813)   +11 more
core   +1 more source

Addition to Electron Deficient Olefins of α-Oxy Carbon- Centered Radicals, Generated from Cyclic Ethers and Acetals by the Reaction with Alkylperoxy- λ3-iodane

Molecules, 2005
Thermal decomposition of 1-tert-butylperoxy-1,2-benziodoxol-3(1H)-one in cyclic ethers and acetals at 50 °C generates α-oxy carbon-centered radicals, which undergo an addition reaction with vinyl sulfones and unsaturated esters.
M. Ochiai, T. Suefuji, Y. Takeuchi, T. Sueda   +3 more
doaj   +1 more source

Ring-opening polymerization

Chemistry Teacher International, 2021
Ring-opening polymerization is defined by IUPAC (Penczek, S., Moad, G. (2008). Glossary of the terms related to kinetics, thermodynamics, and mechanisms of polymerization.
Penczek Stanislaw, Pretula Julia, Slomkowski Stanislaw   +2 more
doaj   +1 more source

Lewis Acid-Initiated Ring-Opening Reactions of Five- and Six-Membered Cyclic Ethers Based on the Oxonium Ylide Intermediates

Organics
In light of the small ring strain of five/six-membered cyclic ethers, constructing complex molecules via ring-opening reactions has consistently been a highly challenging topic in organic synthesis.
Dandan Jiang, Jun Xiao, Yingzhen Zhang, Kunming Liu, Juanhua Li, Jinbiao Liu   +5 more
doaj   +1 more source

Thermophysical properties of binary mixtures of N,N-dimethylformamide with three cyclic ethers [PDF]

Journal of the Serbian Chemical Society, 2013
Densities and viscosities of the binary mixtures consisting of tetrahydrofuran (THF), 1,3-dioxolane (1,3-DO) and 1,4-dioxane (1,4-DO) with N,N-dimethylformamide (DMF) over the entire range of composition were measured at temperatures 298.15, 308.15 ...
Sinha Biswajit, Pradhan Rajendra, Saha Sanjoy, Brahman Dhiraj, Sarkar Abhijit   +4 more
doaj   +1 more source

Occupational exposure to glycidyl ethers [PDF]

"Glycidyl ethers are characterized by the presence of a three-carbon chain with an epoxide group and an ether linkage. This recommended standard applies to monoglycidyl ethers and diglycidyl ethers that contain an alkyl group, an aromatic group, or a ...

core   +1 more source

Iminoiodane- and Brønsted Base-Mediated Cross Dehydrogenative Coupling of Cyclic Ethers with 1,3-Dicarbonyl Compounds

Molecules, 2015
A one-pot, two-step approach to prepare 2-tetrahydrofuran and -pyran substituted 1,3-dicarbonyl compounds by PhI=NTs-mediated amination/Brønsted base-catalyzed cross dehydrogenative coupling (CDC) reaction of the cyclic ether and 1,3-dicarbonyl ...
Ciputra Tejo, Xiao Rong Sim, Bo Ra Lee, Benjamin James Ayers, Chung-Hang Leung, Dik-Lung Ma, Philip Wai Hong Chan   +6 more
doaj   +1 more source