Results 251 to 260 of about 12,704 (308)
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Reactions of Diorganyliodophosphine with Cyclic Ethers
Phosphorus, Sulfur, and Silicon and the Related Elements, 1990Abstract Reactions of phosphorus halides (chloro- and bromoderivatives) with α-alkylen oxides and other cyclic ethers are thoroughly investigated and have practical. significance. Phosphorus iodides, on the contrary, were rarely used in the reactions of this type. It is known only that PI3 and P2I4 are convenient olefinic agents.
N. G. Feshchenko, N. D. Gomelya
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Catalytic Reduction of Cyclic Ethers with Hydrosilanes
Chemistry – An Asian Journal, 2019AbstractCatalytic reductive transformations of ethers as a synthetic building block are an important class of chemical reactions because a range of essential chemical feedstocks and fuels in contemporary life can be prepared through the key step of ethereal C−O bond cleavage of cellulosic biomass.
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Synthesis of cyclic precursors of poly(ether ether ketone)
Polymer Bulletin, 1999A novel synthetic route to cyclic PEEK precursors is described. These new cyclic oligomers have been prepared from hydroquinone and N-phenyl(4,4'-difluorodiphenyl) ketimine. Matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS) analysis unambiguously confirmed the cyclic nature.
Yinghua Qi, Tianlu Chen, Jiping Xu
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Anionic copolymerization of cyclic ethers with cyclic anhydrides
1984This article summarizes and analyzes the results obtained for the anionic copolymerization of cyclic ethers with cyclic anhydrides. This reaction is of great practical importance, especially as curing reaction of epoxy resins and is also used for the preparation of linear polyesters with special functional pendant groups.
Jozef Lustoň, František Vašš
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Polymerization and copolymerization of cyclic imino-ethers
Pure and Applied Chemistry, 1974Abstract
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Photopolymerization of unsaturated cyclic ethers
Polymer, 1998Abstract 2,3-Dihydro-4H-pyran, DHP, and 2,3-dihydrofuran, DHF, are photopolymerized at ambient temperature with the aid of diphenyl iodonium hexafluorophosphate, Ph 2 I + PF 6 − or triphenyl sulfonium hexafluorophosphate, Ph 3 S + PF 6 − at λ inc = 310 or 340 nm, respectively.
Qin Qin Zhu, Wolfram Schnabel
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The Interaction of Cations with Cyclic Ethers
1974Proton and carbon nuclear magnetic resonance (NMR) have been used to aid in the understanding of solution structure, cation, anion and solvent interactions, and structural aspects of cation specificities of "crown" cyclic polyethers. Investigations were made in water, water-acetone, acetone and chloroform as a function of cation concentration and of ...
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