37773-02-7Relevant academic research and scientific papers
Sodium Selenosulfate from Sodium Sulfite and Selenium Powder: An Odorless Selenylating Reagent for Alkyl Halides to Produce Dialkyl Diselenide Catalysts
Chen, Chao,Jiang, Xuefeng,Ling, Hai,Liu, Yonghong,Xu, Qing,Yu, Lei
supporting information, p. 1698 - 1702 (2019/08/26)
Na 2 SeSO 3, which can be generated in situ by the reaction of Na 2 SO 3 with Se power, was found to be an odorless reagent for the selenenylation of alkyl halides to produce dialkyl diselenides. These products have been recently shown to be good catalysts for the Baeyer-Villiger oxidation of carbonyl compounds, for the selective oxidation of alkenes, or for the oxidative deoximation of oximes. By using aqueous EtOH as the solvent and avoiding the generation of a malodourous selenol intermediate, the selenylation reaction with Na 2 SeSO 3 is much more environmentally friendly than conventional methods. Owing to the cheap and abundant starting materials and selenium reagents, our novel synthetic method reduces the production costs of dialkyl diselenides as organoselenium catalysts, thereby advancing practical applications of organoselenium-catalysis technologies.
Conditions-driven selective synthesis of selenides and selenols from elemental selenium
Krief, Alain,Trabelsi, Mahmoud,Dumont, Willy,Derock, Michel
, p. 1751 - 1754 (2007/10/03)
Sodium borohydride in DMF is able to reduce elemental selenium in the presence of ethanol. Alkylation of the species resulting from the reaction of 2:1 molar equivalents of NaBH4/Se allows the selective synthesis, under very mild conditions, of symmetrical dialkyl selenides. Addition of formic acid, prior to that of the electrophile, permits the synthesis of the corresponding selenols.
Synthesis of diselenides and selenides from elemental selenium
Krief, Alain,Derock, Michel
, p. 3083 - 3086 (2007/10/03)
Sodium hydride is able to reduce elemental selenium to sodium diselenide (Na2Se2), but not to sodium selenide (Na2Se). Dialkyl diselenides and even dialkyl selenides, including unsymmetrical dialkyl selenides, can be nevertheless synthesized using the proper Se/NaH ratio (1/1 or 1/2).
NEW ROUTE TO ORGANIC SELENIDES AND TELLURIDES
Korchevin, N. A.,Podkuiko, P. A.,Stankevich, V. K.,Deryagina, E. N.,Trofimov, B. A.
, p. 85 - 87 (2007/10/03)
A new simple and convenient synthetic route to organic chalcogenides R2Y (R = alkyl, allyl, benzyl; Y = Se, Te) is developed, which involves generation of Se2- and Te2- anions from Se and Te in the system KOH-hydrazine hydrate, where the latter plays the role of both the medium and reducing agent.Subsequent alkylation of the anions with the corresponding alkyl halides furnishes the target chalcogenides in almost 95percent yield.Alkyl chlorides react faster than alkyl bromides and alkyl iodides.
ALKYL VINYL SELENIDES FROM ACETYLENE, ELEMENTAL SELENIUM, AND ALKYL HALIDES
Gusarova, N. K.,Potapov, V. A.,Amosova, S. V.,Trofimov, B. A.
, p. 2168 - 2171 (2007/10/02)
Elemental selenium reacts with acetylene and alkyl halides when heated (105-115 deg C) in an aqueous alkaline medium and gives alkyl vinyl selenides (with yields of up to 44percent) in addition to divinyl and dialkyl selenides.
