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A pulse radiolysis study of the reactions of 3-hydroxykynurenine and kynurenine with oxidizing and reducing radicals

Atherton, S.J. ; Dillon, J. ; Gaillard, E.R.

Amsterdam : Elsevier

Biochimica et Biophysica Acta (BBA)/General Subjects 1158 (1993), S. 75-82

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ISSN: 0304-4165

Schlagwort(e): Kynurenine ; Oxidation ; Pulse radiolysis ; Reduction

Quelle: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002

Thema: Biologie , Chemie und Pharmazie , Medizin , Physik

Materialart: Digitale Medien

URL: http://linkinghub.elsevier.com/retrieve/pii/0304-4165(93)90099-T

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Digitale Medien

Anionic polymerization and copolymerization of acrylophenone (1968)

Mulvaney, J. E. ; Dillon, J. G.

New York : Wiley-Blackwell

Journal of Polymer Science Part A-1: Polymer Chemistry 6 (1968), S. 1849-1855

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ISSN: 0449-296X

Schlagwort(e): Physics ; Polymer and Materials Science

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie

Notizen: The n-butyllithium-initiated polymerization of a mixture of acrylophenone (AP) and styrene produces only poly(AP), indicating that a chain ending in an AP enolate ion is not sufficiently nucleophilic to add to styrene. Radical copolymerization of AP and styrene yields a polymer containing 65% AP (at 41% conversion). In contrast, lithium dispersion-initiated polymerization of AP and styrene produces a product containing 50-99% AP, depending upon conversion. This observation is discussed in terms of current knowledge concerning alkali metal-initiated polymerization.

Zusätzliches Material: 3 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/pol.1968.150060707

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Polymerization and copolymerization of α-methacrylophenone (1968)

Mulvaney, J. E. ; Dillon, J. G. ; Laverty, J. L.

New York : Wiley-Blackwell

Journal of Polymer Science Part A-1: Polymer Chemistry 6 (1968), S. 1841-1848

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ISSN: 0449-296X

Schlagwort(e): Physics ; Polymer and Materials Science

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie

Notizen: Under a variety of conditions it has not been possible to induce the free-radical-initiated homopolymerization of α-methacrylophenone (α-MAP). The only product isolated from such efforts was the Diels-Alder dimer of the monomer. A Mayo-Lewis plot of the free-radical copolymerization of α-MAP and styrene shows considerable scatter but the copolymer composition indicates that an α-MAP unit can add to itself. These results have been ascribed to a penultimate effect. α-MAP is homopolymerized by dimsylsodium or n-butyllithium. Attempted copolymerization of α-map and styrene with n-butyllithium produces 〉95% α-MAP. Unexpectedly, α-MAP does not homopolymerize with lithium dispersion, but does react in the presence of styrene to give product containing a relatively small amount of α-MAP.

Zusätzliches Material: 2 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/pol.1968.150060706

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