N-(Phenylseleno)phthalimide: A useful reagent for the α-selenylation of ketones and aldehydes.
作者:Janine Cossy、Nathalie Furet
DOI:10.1016/s0040-4039(00)61557-5
日期:1993.11
α-phenylselenoketones and α-phenylselenoaldehydes are obtained with a good regioselectivity by treatment of the corresponding ketones or aldehydes with N-(phenylseleno)phthalimide and p-toluenesulfonic acid.
K<sub>2</sub>S<sub>2</sub>O<sub>8</sub>-promoted C–Se bond formation to construct α-phenylseleno carbonyl compounds and α,β-unsaturated carbonyl compounds
oxidant in the absence of catalyst and afford desired products in moderate to excellent yields. This protocol provides a very simple route for the synthesis of α-phenylseleno carbonylcompounds and α,β-unsaturatedcarbonylcompounds.
已经开发了一种新的 K 2 S 2 O 8促进中性条件下交叉偶联形成的 C-Se 键。在没有催化剂的情况下,使用 K 2 S 2 O 8作为氧化剂,多种醛和酮反应良好,并以中等至优异的产率提供所需的产物。该协议为合成α-苯基硒羰基化合物和α、β-不饱和羰基化合物提供了一条非常简单的路线。
Organoselenium chemistry. Conversion of ketones to enones by selenoxide syn elimination
作者:Hans J. Reich、James M. Renga、Ieva L. Reich
DOI:10.1021/ja00852a019
日期:1975.9
of the selenoxide function. The many synthetic transformations originating from a,P-unsaturated carbonyl compounds have made their prep- aration a long standing important synthetic problem. The most straightforward method is the dehydrogenation of car- bonyl compounds. There are a number of methods for per- forming this the most important of which is the a-bromination-dehydrobromination method.' Orienta-
Selective oxidation of hydroxy groups of phenylthio and phenylseleno alcohols
作者:Makoto Shimizu、Hirokazu Urabe、Isao Kuwajima
DOI:10.1016/s0040-4039(01)90493-9
日期:1981.1
Various kinds of alcohols bearing phenylthio or phenylseleno moiety were converted into the corresponding carbonyl compounds in good to excellent yields by treating with dimesityl diselenide and -butyl hydroperoxide.
giving instead of the expected olefinic Wittig product the corresponding 2-phenylselenocyclohexanone (VI). The reaction pathuay has been demonstrated to involve nucleophilic substitution on selenium by the katone enolate, the leaving group being the selenium free phosphorane (I). This reaction is shown to be general for seven more ketones, thus indicating its preparative potential.