General synthesis of alkyl phenyl selenides from organic halides mediated by zinc in aqueous medium
作者:Lothar W Bieber、Ana C.P.F de Sá、Paulo H Menezes、Simone M.C Gonçalves
DOI:10.1016/s0040-4039(01)00820-6
日期:2001.7
halides of different structural types react with diphenyl diselenide and zinc dust in aqueous medium to give alkyl phenyl selenides. Benzylic and allylic bromides, α-bromoesters, acids and ketones and some primary alkyl iodides produce high yields even under acidic conditions. Less reactive halides need basic medium. The reaction proceeds equally well in the presence of various unprotected functional
不同结构类型的有机卤化物与二苯基二硒化物和锌粉在水性介质中反应,生成烷基苯基硒化物。苄基和烯丙基溴化物,α-溴代酸酯,酸和酮以及某些伯烷基碘化物即使在酸性条件下也能产生高收率。反应性较低的卤化物需要基本介质。在各种未保护的官能团的存在下,反应同样良好地进行。对照实验通过烷基支持S H 2机理。
Ruthenium(iii)-catalysed phenylselenylation of allyl acetates by diphenyl diselenide and indium(i) bromide in neat: isolation and identification of intermediate
作者:Amit Saha、Brindaban C. Ranu
DOI:10.1039/c0ob00317d
日期:——
A fast and efficient phenylselenylation of allyl acetates by diphenyl diselenide and indium(I) bromide has been achieved in neat under the catalysis of Ru(acac)3. The intermediate complex of diphenyl diselenide and indium has been isolated and identified as a polymeric pentacoordinated In(III) selenolate complex, [In(SePh)3]n.
Indium-mediated cleavage of diphenyl diselenide and diphenyl disulfide: efficient one-pot synthesis of unsymmetrical diorganyl selenides, sulfides, and selenoesters
作者:Wanida Munbunjong、Eun Hwa Lee、Poonlarp Ngernmaneerat、Sung Jun Kim、Gurpinder Singh、Warinthorn Chavasiri、Doo Ok Jang
DOI:10.1016/j.tet.2009.01.072
日期:2009.3
convenient and efficient method was developed for the synthesis of alkyl phenyl selenides, sulfides, and selenoesters in one-pot reaction by using indium metal. The reaction showed the selectivity for tert-alkyl, benzylic, and allylic halides over primary and secondary alkyl halides. For the reaction of primary and secondary alkyl iodides and bromides, the yields of selenides were improved by the addition
Rhodium-catalyzed cascade reactions of triazoles with organoselenium compounds – a combined experimental and mechanistic study
作者:Fang Li、Chao Pei、Rene M. Koenigs
DOI:10.1039/d1sc00495f
日期:——
our studies on the reaction of organoselenium compounds with triazoles under thermal conditions using simple Rh(II) catalysts. These reactions do not provide the product of classic rearrangement reactions. Instead two different cascade reactions were uncovered. While allyl selenides react in a cascade of sigmatropic rearrangement and selenium-mediated radical cyclizationreaction to give dihydropyrroles
2-(1-dimethylaminoethyl)ferrocenyl selenides with [N-(toluene-p-sulfonyl)imino]-phenyliodinane and chloramine-T affords the corresponding chiral allylic amines via[2,3]sigmatropicrearrangement of the selenimide intermediates with up to 87% ee, highly diastereoselective imination of selenides and highly stereospecific [2,3]sigmatropicrearrangement being shown.