Under acidic conditions zinc reduces diselenides to afford selenols, which can be either isolated or treated in situ with alkyl halides to produce alkyl selenides or with epoxides to give β-hydroxyselenides.
Novel functional group transformations involving alkyl phenyl selenones
作者:Alain Krief、Willy Dumont、Jean-No�l Denis
DOI:10.1039/c39850000571
日期:——
Alkylphenylselenones readily undergo substitution reactions, and are valuable precursors of epoxides on reaction with aldehydes in the presence of bases.
烷基苯基硒酮很容易发生取代反应,并且在碱存在下与醛反应时是有价值的环氧化物前体。
Odorless Diphenyl Diselenide and Disulfide: Syntheses and Applications
作者:Manabu Node、Pranab K. Patra、Kandasamy Shanmugasundaram、Manabu Matoba、Kiyoharu Nishide、Tetsuya Kajimoto
DOI:10.1055/s-2004-837289
日期:——
Bis[4-(trimethylsilyl)phenyl]diselenide (3) and bis[4-(trimethylsilyl)phenyl]disulfide (31) are found to be odorless equivalents of the commonly used diphenyl diselenide and diphenyldisulfide, respectively. The diselenide 3 is shown to be useful in the preparation of odorless selenium(II) chloride 26 and selenium(IV) trichloride 28 that follow similar reactivity patterns to their phenyl derivatives and
双[4-(三甲基甲硅烷基)苯基]二硒化物(3)和双[4-(三甲基甲硅烷基)苯基]二硫化物(31)分别是常用的二苯基二硒化物和二苯基二硫化物的无味等效物。二硒化物 3 可用于制备无味的氯化硒 (II) 26 和三氯化硒 (IV) 28,它们的反应模式与其苯基衍生物相似,并且可以在干燥条件下冷藏储存。相应的溴化硒 (II) 必须在使用前从 3 新鲜制备。还表明硫化物产物中的三甲基甲硅烷基可以使用 TFA 定量地进行原甲硅烷基化。
A Convenient Procedure for the Preparation of Organic Selenides
Treatment of diphenyl diselenide with tributylphosphine in an alkaline medium forms phenylselenolate ion which converts alkyl halides, α,β-unsaturated ketones, and epoxides into alkyl selenides, (phenylseleno)alkenones, and β-(phenylseleno) alkanols, respectively, in high yield. Selenation of 3α-bromocholestane gives 3β-(phenylseleno)cholestane with complete inversion of the configuration.
Magnesium bis(monoperoxyphthalate) hexahydrate as mild and efficient oxidant for the synthesis of selenones
作者:Andrea Temperini、Massimo Curini、Ornelio Rosati、Lucio Minuti
DOI:10.3762/bjoc.10.127
日期:——
method for the direct oxidation of selenides to selenones using magnesium bis(monoperoxyphthalate) hexahydrate (MMPP) has been developed. Noteworthy this transformation proceeds at room temperature, employs a cheap and safety oxidant and has a broad functional group tolerance. Moreover, the produced selenones could be useful intermediates for the synthesis of different heterocyclic compounds.