Organoselenium group-transfer reactions

Organoselenium compounds are very versatile radical precm-sors which are widely used. Due to their stability and ease of preparation, they offer imique advantages over organic halides as radical precm-sors. They can be utilized in tin mediated radical reactions as weU as in group transfer reactions for the formation of carbon-carbon bonds and carbon-heteroatom bonds. Selenols and diselenides have found applications as reducing agents and radical traps, respectively. A survey of these different reaction types wiU be given. Information about new reactions based on electron and photoelectron transfers wiU also be provided. 

The group transfer ability of organoselenium compounds [17] has been applied to a three-component coupling reaction involving carbon monoxide (Scheme 6.10)... 

Other Elements - Though most of the focus on photoinitiated SET processes remains on the mesolytic reactions of radical cations, organoselenium radical anions, produced by SET sensitisation by 1,5-dimethoxynaphthalene, show synthetic promise as intermediates leading to unimolecular group transfer radical sequences. Thus, irradiation of (525) in the presence of 1,5-dimethoxynaphthalene and ascorbic acid as sacrificial electron donor in aqueous acetonitrile... 

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