Development of the Enantioselective Addition of Ethyl Diazoacetate to Aldehydes: Asymmetric Synthesis of 1,2-Diols
作者:Barry M. Trost、Sushant Malhotra、Philipp Koschker、Pascal Ellerbrock
DOI:10.1021/ja206995s
日期:2012.2.1
A novel synthetic strategy toward the asymmetric synthesis of vicinal diols bearing a tertiary center is presented. The method encompasses the dinuclear Mg-catalyzed asymmetric addition of ethyldiazoacetate into several aldehydes, oxidation of the diazo functionality, and diastereoselective alkyl transfer of various organometallics into the resulting chiral β-hydroxy-α-ketoesters to afford a diverse
Visible-light-driven radical 1,3-addition of selenosulfonates to vinyldiazo compounds
作者:Weiyu Li、Lei Zhou
DOI:10.1039/d1gc02036f
日期:——
radical 1,3-selenosulfonylation of vinyldiazo compounds with selenosulfonates, providing various γ-seleno allylic sulfones in good yields. This photochemical reaction was carried out at room temperature in an open flask using ethyl acetate as the solvent without any photocatalysts or additives. The control experiments corroborated that the 1,3-addition proceeded via a radical-chain propagation process. The
KF/Nano-clinoptilolite Catalyzed Aldol-Type Reaction of Aldehydes with Ethyl Diazoacetate
作者:Javad Balou、Mohammad A. Khalilzadeh、Dariush Zareyee
DOI:10.1007/s10562-017-2158-6
日期:2017.10
nano-clinoptilolite (KF/CP NPs) was used as an excellent catalytic system for direct aldol-type condensation of aldehydes with ethyl diazoacetate under solvent-less conditions. A variety of α-diazo carbonyl derivatives were prepared in good to excellent yields in short reaction times.Graphical Abstract
Stereoselective Intramolecular 1,3 C−H Insertion in Rh(II) Carbene Reactions
作者:Weifeng Shi、Bo Zhang、Jian Zhang、Binge Liu、Shiwei Zhang、Jianbo Wang
DOI:10.1021/ol051130l
日期:2005.7.1
[reaction: see text] 1,3 C-Hinsertion has been found to be a predominant reaction pathway in the Rh(II)-mediated reaction of beta-tosyl alpha-diazo carbonyl compounds.
Reaction of β-trimethylsiloxy α-diazocarbonyl compounds with trimethylsilyl halides: a novel diazo decomposition process
作者:Fengping Xiao、Zhenhua Zhang、Jian Zhang、Jianbo Wang
DOI:10.1016/j.tetlet.2005.10.070
日期:2005.12
When β-trimethylsiloxy α-diazocarbonyl compounds were treated with trimethylsilyl halide, a mixture of α- and γ-halide substituted unsaturated carbonyl compounds was obtained. The mechanism of this novel diazo decomposition process is discussed.