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pro vyhledávání: '"Christopher J. Cooksey"'
Autor:
Christopher J. Cooksey
Publikováno v:
Molecules, Vol 6, Iss 9, Pp 736-769 (2001)
The genesis of the purple dye from shellfish, its composition, origin, intermediates, analysis and synthesis of the components, 6,6’-dibromoindigo, 6-bromoindigo and 6,6’-dibromoindirubin are reviewed.
Externí odkaz:
https://doaj.org/article/3e0c527f36bf4d18a90749265097d7c7
Autor:
Christopher A. Ramsden, Peter J. Garratt, Christopher J. Cooksey, John Clews, Patrick A. Riley, Edward J. Land
Publikováno v:
Journal of the Chemical Society, Perkin Transactions 1. :4306-4315
Oxidation of N,N-dialkyldopamines by either dianisyltellurium oxide or tyrosinase gives 2,3-dihydro-1H-indolium-5-olates which are formed by cyclisation of an intermediate o-quinone. The kinetics of formation and cyclisation of the N,N-dimethyl-o-qui
Publikováno v:
Inorganica Chimica Acta. 288:112-117
Thermochemical and mass spectrometric studies on allyl cobaloxime indicate that it thermally decomposes in a stepwise manner. In comparison with the behaviour of benzyl cobaloximes, which are also precursors to stabilised carbon radicals, there are s
Publikováno v:
New Journal of Chemistry. 23:323-328
A new general synthesis of all four isomers of monobromoindigo is outlined, the synthesis of 4-, 6- and 7-bromoindigo being described for the first time. All four monobromoindigos as well as indigo and the historically important 6,6′-dibromoindigo
Autor:
Christopher A. Ramsden, Patrick A. Riley, Edward J. Land, Peter J. Garratt, Christopher J. Cooksey
Publikováno v:
Biochemical Journal. 333:685-691
When 3,4-dihydroxybenzylcyanide (DBC) is oxidized by mushroom tyrosinase, the first visible product, identified as the corresponding quinomethane, exhibits an absorption maximum at 480 nm. Pulse-radiolysis experiments, in which the o -quinone is form
Autor:
C I Johnson, Christopher J. Cooksey, Christopher A. Ramsden, Edward J. Land, A M Latter, Patrick A. Riley
Publikováno v:
European Journal of Cancer. 33:135-143
A set of 26 substituted phenols, 10 of which were synthesised in our laboratories, were tested for their rate of oxidation by mushroom tyrosinase in vitro as determined by oximetry and spectrophotometry and for their cytotoxic action in a model syste
Publikováno v:
Organic Preparations and Procedures International. 28:463-467
(1996). A SIMPLE ONE-POT PREPARATION OF 4-ALKOXY-AND 4-ALKYLTHIO-CATECHOLS AND o-BENZOQUINONES. Organic Preparations and Procedures International: Vol. 28, No. 4, pp. 463-467.
Publikováno v:
Applied Organometallic Chemistry. 10:415-420
High yields of alkyl radicals derived from alkylcobaloximes have been achieved using tungsten light (or in some cases ultrasound) radiation in both organic and aqueous media. These improved yields are obtained when pyridine (the usual base ligand) is
Autor:
Edward J. Land, Francis A. P. Rushton, Patrick A. Riley, Christopher A. Ramsden, Christopher J. Cooksey
Publikováno v:
Quantitative Structure-Activity Relationships. 15:498-503
Certain 4-substituted phenols can behave as tyrosine analogues and undergo tyrosinase-catalysed oxidation to cytotoxic o-quinones which react with crucial cellular thiols. Such phenols are potential melanogenesis-specific pro-drugs for the chemothera
Publikováno v:
Endeavour. 17:191-199
This article reviews the origin, use and history of indigo, woad and Tyrian Purple, which are among the most ancient of dyes. The emphasis is on the chemistry of the production and syntheses of the dyes, together with some reference to the use of the