Results 171 to 180 of about 3,507 (204)
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Photochemistry of organoselenium compounds
Journal of the Chemical Society, Chemical Communications, 1974Irradiation of dibenzyl diselenide (l) with 350 nm light in the presence of oxygen afforded benzaldehyde and elemental selenium, whereas irradiation in the absence of oxygen produced dibenzyl monoselenide (ll); irradiation of dibenzyl triselenocarbonate (III) produced dibenzyl diselenide.
Walter Stanley +2 more
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Selenazolidines as Novel Organoselenium Delivery Agents
Bioorganic & Medicinal Chemistry Letters, 2001Two new classes of selenazolidine-4(R)-carboxylic acids (2-oxo and 2-methyl-SCAs) were synthesized and characterized. Both were designed as latent forms of selenocysteine, intended to provide a chemically superior delivery form for selenium. The prodrugs may be clinically useful when selenium supplementation at supranutritional levels is indicated ...
Y, Xie +3 more
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1999
Abstract Organoselenium chemistry is proving increasingly valuable to the synthetic organic chemist. Selenium residues are easily introduced into organic molecules, they serve to effect a variety of useful transformations, and are easily removed at the end of the sequence. These processes are often characterized by high chemo- regio- and
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Abstract Organoselenium chemistry is proving increasingly valuable to the synthetic organic chemist. Selenium residues are easily introduced into organic molecules, they serve to effect a variety of useful transformations, and are easily removed at the end of the sequence. These processes are often characterized by high chemo- regio- and
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Separation of organoselenium compounds and their electrochemical detection
Analytical and Bioanalytical Chemistry, 2004A simplified procedure based on ion-exchange separation of selenourea (Se-U) and selenocystamine (Se-CM), which have very close half-wave potential when they are simultaneously analyzed by voltammetric techniques, has been developed and optimized. Thus, selenocystamine remains in the cation exchanger Purolite C 100 H, whereas selenourea is found in the
Maria Th, Ochsenkühn-Petropoulou +1 more
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Aspects of Organoselenium Chemistry
Phosphorus, Sulfur, and Silicon and the Related Elements, 1998Monoselenophosphate, SePO3H3-n n-, has been chemically synthesized and characterized. It has been shown to be identical with the biological selenium donor SePX. Hydrolysis of selenophosphate is pH dependent and maximal at about pH 7. The dianion is the species which hydrolyzes fastest.
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Carbonyl transposition on organoselenium compounds
Tetrahedron, 1997Abstract Carbonyl conjugated vinylic selenides undergo 1,3 and 1,5-carbonyl transposition sequences through organometallic reagents addition reactions followed by acid hydrolysis.
João V. Comasseto +2 more
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Aspects of Organoselenium and Organotellurium Chemistry
Phosphorus, Sulfur, and Silicon and the Related Elements, 2005The Chemistry of several condensed selenophenes, and tellurophenes (1–4) will be presented. The synthesis of mixed selenium-tellurium fulvenes (5) and generation of 2,4-bis-methyleneditelluretane (6) will be discussed.
M. V. Lakshmikantham +3 more
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Organoselenium chemistry: an overview
1999Abstract Organoselenium compounds have been known since the nineteenth century. Early examples included simple alkyl selenols, selenides, selenoxides and diselenides, which often proved to be highly malodorous, unstable, and generally unpleasant to handle.
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ChemInform Abstract: Organoselenium Chemistry.
ChemInform, 2000AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
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