Oxidative Generation of 1-Nitroalkyl Radicals and Their Addition Reaction to Olefins
作者:Noriyoshi Arai、Koichi Narasaka
DOI:10.1246/bcsj.70.2525
日期:1997.10
1-Nitroalkyl radicals are generated by oxidation of potassium salt of 1-aci-nitroalkanes with ammonium hexanitratocerate(IV). When the oxidation is carried out in the presence of electron-rich olefins, such as silyl enol ethers, intermolecular addition of the radicals onto the olefins proceeds to afford β-nitro ketones, which are further converted to α,β-unsaturated ketones in high yield. Stereoselective
1-硝基烷基自由基是由 1-aci-硝基烷烃的钾盐与六硝酸酯 (IV) 铵氧化生成的。当在富电子烯烃(如甲硅烷基烯醇醚)存在下进行氧化时,自由基与烯烃的分子间加成得到 β-硝基酮,其进一步转化为 α,β-不饱和酮。屈服。稠环系统的立体选择性构建是通过 1-硝基烷基的分子内加成实现的。