Zn/RuCl<sub>3</sub>-Promoted Cleavage of Diselenides: An Efficient Michael Addition of Zinc Selenolates to Conjugated Alkenes in Aqueous Media
作者:Barahman Movassagh、Ameneh Tatar
DOI:10.1055/s-2007-984495
日期:2007.7
simple and highly efficient one-pot route to β-selenocarbonyl compounds and nitriles has been developed by Zn/RuCl 3 -catalyzed cleavage of diselenides and subsequent Michael addition of zinc selenolates to conjugated alkenes in aqueousmedia.
A Convenient Synthesis of ?-Phenylselenocarbonyl Compounds by In-TMSCl Promoted Cleavage of Diphenyl Diselenide and Subsequent Michael Addition
作者:Brindaban?C. Ranu、Arijit Das
DOI:10.1002/adsc.200404355
日期:2005.4
β-phenylselenocarbonyl compounds by a one-pot reaction of diphenyldiselenide and α,β-unsaturated ketones, aldehydes, esters and nitriles in the presence of indium metal-trimethylsilyl chloride under sonication. Presumably, the In-TMSCl reagent system reacts with diphenyldiselenide to form an intermediate, PhSeSiMe3, which then undergoes Michael addition with the α,β-unsaturated carbonyl compounds to produce
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。
CeCl<sub>3</sub>/Sm System Induced Reductive Cleavage of the Se-Se Bond in Diaryl Diselenides: A Novel Method for the Synthesis of β-Selenoesters and β-Selenonitriles
作者:Xue Li、Songlin Zhang、Yulu Wang、Yongmin Zhang
DOI:10.1002/jccs.200200160
日期:2002.12
The Se-Se bond in diselenides was reduced by CeCl 3 /Sm system to produce selenolate anions, which react with α,β-unsaturated esters or α,β-unsaturated nitriles to afford β-selenoesters and β-selenonitriles, respectively.
method of unsymmetrical selenides has been developed. When diphenyldiselenide was allowed to react with two equimolar amounts of primary alkyl iodides and bromides in the presence of an equimolar amount of lanthanum metal, alkyl phenyl selenides were formed in moderate to good yields. For the reaction of primary alkyl chlorides and secondary alkyl iodides, the yields of the selenides were low; however,