En 特别,反应性相对于 de PhS • , PhSe • et I • 与 de PhS • , PhSe • et I • 属 a partir du disulfure de phenyle, diseleniure de phenyle et du β-iodo 苯乙烯 ou du (diphenyl-1,1 iodo -2) 乙烯
S H2 reactions of diphenyl diselenide; preparation and reactions of bridgehead selenides
作者:M. John Perkins、Eric S. Turner
DOI:10.1039/c39810000139
日期:——
benzene when R is primary alkyl; with 1-adamantyl radicals this SH2 displacement affords a route to 1-adamantyl phenyl selenide which, on oxidation and pyrolysis of the resultant selenoxide, gives adamantan-1-ol; in contrast the selenoxide from bicyclo[3.3.1]nonan-1-yl phenyl selenide decomposes via bicyclo[3.3.1]non-l-ene.
对于S H 2过程,R·+ PhSeSePh→PhSeR + PhSe·,k = ca。当R为伯烷基时,在苯中80°C,5×10 7 mol –1 s –1;具有1-金刚烷基的该S H 2置换提供了通往1-金刚烷基苯基硒化物的途径,其在所得硒氧化物的氧化和热解后,产生了金刚烷-1-醇。与此相反,从双环的氧化硒[3.3.1]壬烷-1-基苯基硒化物分解经由二环[3.3.1]壬-1-烯。
Radical intermediates in the Zn-promoted Barbier-type alkylation of diphenyl diselenide in aqueous medium
作者:José Ayron Lira dos Anjos、Lothar Wilhelm Bieber
DOI:10.1016/j.tetlet.2012.09.063
日期:2012.11
The zinc promoted Barbier-type reaction of alkylhalides and diphenyl diselenide in aqueous medium leads to high yields of mixed selenides even in acidic medium. Especially the efficient formation of t-butylphenylselenide cannot be explained by nucleophilicsubstitution and raises the question of an alternative reaction mechanism. Three suitable halide precursors of ‘radical clocks’ of increasing rate
Photosensitized one-electron reductive cleavage of a carbon–selenium bond: a novel chemoselective deselenenylation and phenylselenenyl group transfer radical chain reaction
作者:Ganesh Pandey、K. S. Sesha Poleswara Rao、B. B. V. Soma Sekhar
DOI:10.1039/c39930001636
日期:——
A novel photosensitized one-electron reduction of organoselenium compounds leading to chemoselective deselenenylation and phenylselenyl group transfer radical chain processes is reported.
Photosensitized Electron Transfer Promoted Reductive Activation of Carbon−Selenium Bonds To Generate Carbon-Centered Radicals: Application for Unimolecular Group Transfer Radical Reactions
作者:Ganesh Pandey、K. S. Sesha Poleswara Rao、K. V. Nageshwar Rao
DOI:10.1021/jo960805i
日期:1996.1.1
presented in this paper explores the mechanistic aspects and synthetic potentials of photosensitizedelectrontransfer (PET) promoted reductive activation of organoselenium substrates. PET activation of substrates 1-5 is achieved through a photosystem comprised of light-absorbing 1,5-dimethoxynaphthalene (DMN) as electron donor and ascorbic acid as co-oxidant. The fluorescence quenching of (1)DMN by organoselenium