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
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
A new general protocol for the synthesis of O,Se-acetals using the seleno-Pummerer reaction has been developed, and their radical-based two- and three-component coupling reactions were studied. The three-component coupling employed the O,Se-acetal, cyclopentenone, and an allylstannane derivative, and enabled stereoselective installations of α-acyloxy alkyl and functionalized allyl groups to generate
Metal complexes of unsaturated selenides. Part I. Palladium(II) and platinum(II) complexes with ligands containing the but-3-enyl and pent-4-enyl groups
作者:D. C. Goodall
DOI:10.1039/j19690000890
日期:——
but-3-enyl phenyl selenide form chelate complexes of general formula [PdX2L](X = Cl or Br) and [PtX2L](X = Cl, Br, or I); and n-butyl pent-4-enyl selenide and pent-4-enyl phenyl selenide form chelate complexes of formula [PtX2L](X = Cl, Br, or l), in which co-ordination to the metal occurs through both the olefinic double bond and the selenium atom. The complexes react with triphenylphosphine with replacement
photoinduced decarboxylative C-Se bond-forming reaction employing alkyl N-hydroxyphthalimide esters as alkylation reagents and acid red 94 as an inexpensive photocatalyst has been documented. A broad range of alkyl N-hydroxyphthalimide esters were tolerated for this decarboxylation process, providing a series of unsymmetrical monoselenides with good to excellent yields. The mild conditions and the excellent