Organoselenium Chemistry Synthesis And Reactions Pdf
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- Organoselenium Chemistry: Between Synthesis and Biochemistry
- Organoselenium Chemistry. Synthesis and Reactions
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Organoselenium Chemistry: Between Synthesis and Biochemistry
Organoselenium Chemistry. Synthesis and Reactions
A variety of selenium compounds were proven to be useful reagents and catalysts for organic synthesis over the past several decades. The topic of oxidations catalyzed by organoselenium derivatives has rapidly expanded in the last fifteen years This paper is devoted to the synthetic applications of the oxidation reactions mediated by selenium compounds such as selenium IV oxide, areneseleninic acids, their anhydrides, selenides, diselenides, benzisoselenazol-3 2 H -ones and other less often used other organoselenium compounds. Other reactions such as dehydrogenation and aromatization, active carbon-carbon bond cleavage, oxidative amidation, bromolactonization and oxidation of bromide for subsequent reactions with alkenes are also successfully mediated by selenium IV oxide or organoselenium compounds. The oxidation mechanisms of ionic or free radical character depending on the substrate and oxidant are discussed. Coverage of the literature up to early is provided.
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Organoselenium compounds or seleno-organic are chemical compounds containing carbon -to- selenium chemical bonds. Organoselenium chemistry is the corresponding science exploring their properties and reactivity. Se II is the dominant form in organoselenium chemistry. Selenium compounds are more nucleophilic than the corresponding sulfur compounds and also more acidic. The p K a values of XH 2 are 16 for oxygen, 7 for sulfur and 3. Organoselenium compounds are found at trace levels in ambient waters, soils and sediments.
These metrics are regularly updated to reflect usage leading up to the last few days. Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts. The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online.
Download PDF Flyer. DOI: Recommend this Book to your Library. The use of organoselenium reagents as catalysts is a common thread that runs through the chapters of this book, introducing important aspects of the modern organoselenium chemistry: organocatalysis, green chemistry, bioinspiration, antioxidant activity. The eBook covers the most recent developments in the classical synthetic application of organoselenium reagents such as electrophilic, nucleophilic and free radical reagents. The volume also features a discussion on the synthesis and the synthetic applications of some emerging classes of selenium compounds such as hypervalent selenium species and selenoamides, and also addresses some biological aspects such as the antimicrobial activity of organoselenium derivatives and the biochemistry of selenoproteins.
Vimal K. E-mail: jainvk barc. This chapter provides an overview of organoselenium chemistry. The chemistry of organoselenium compounds has undergone rapid growth during the past three decades due to their increasing applications in organic synthesis, precursors for metal selenide semiconductor materials and as mimics of seleno-enzymes in biological processes. Several selenium species are formed during the catalytic cycle involving glutathione peroxidise as an antioxidant.