Results 261 to 270 of about 12,676 (308)
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Polymer Bulletin, 1986
Cyclic silyl pinacole ethers are a new class of difunctional free radical initiators which have been prepared and characterized. On the basis of their first order kinetic rates of dissociation and half-lives, these compounds are high temperature initiators useful generally above 120°C.
J. V. Crivello, J. L. Lee, D. A. Conlon
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Cyclic silyl pinacole ethers are a new class of difunctional free radical initiators which have been prepared and characterized. On the basis of their first order kinetic rates of dissociation and half-lives, these compounds are high temperature initiators useful generally above 120°C.
J. V. Crivello, J. L. Lee, D. A. Conlon
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Photoinduced sulfonylation of cyclic ethers
Tetrahedron Letters, 2014Abstract A one-step preparation of α-sulfonylated cyclic ethers has been achieved via the intermolecular sulfonylation of ethereal C H bonds. In this process, the chemoselective cleavage of the ethereal C H bond was achieved by hydrogen abstraction with photo-excited benzophenone, and the sulfonyl unit was provided by sulfonyl chloride. This protocol
Shin Kamijo +4 more
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Synthesis of cyclic and acyclic enol ethers (vinyl ethers)
The Journal of Organic Chemistry, 1993A general method has been developed for the conversion of both cyclic and acyclic acetals of cyclic ketones, acyclic ketones, and aldehydes into enol ethers through treatment of the acetal with trimethylsilyl triflate in the presence of N,N-diisopropylethylamine.
Paul G. Gassman +2 more
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Polymerization of cyclic imino ethers
Journal of Colloid and Interface Science, 1969Abstract Critical surface tensions ( γ e ) of a series of crystalline poly ( N -acyl ethyleneimines) and poly( N -benzoyl ethyleneimine) were measured. The polymers with aliphatic side chains had γ e dropping from 24.5 to 22 dynes/cm as the side chain lengthened from butyryl to stearoyl. This shows that the surfaces of the polymers comprise close
Morton Litt, Jack Herz
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3,4‐Benzoxanthene cyclic ethers
Recueil des Travaux Chimiques des Pays-Bas, 1965AbstractTreatment of 3,4‐benzoxanthone hydrazone with tetrahalogeno‐α‐benzoquinones gave the corresponding cyclic ethers (IIIa‐b). Reductive cleavage of the latter with lithium aluminium hydride yielded 3,4‐benzoxanthene together with the tetrahalogenocatechol.
A. Mustafa, N. Latif, H. El‐Namaky
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Modeling Cometabolism of Cyclic Ethers
Environmental Engineering Science, 2002The biodegradation kinetics of a mixed culture with the ability to cometabolically degrade 1,4-dioxane in the presence of tetrahydrofuran (THF) were studied using a previously published model.
Matthew J. Zenker +2 more
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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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