Generation of<i>β</i>-Carbonyl Radicals from Cyclopropanol Derivatives by the Oxidation with Manganese(III) 2-Pyridinecarboxylate and Their Reactions with Electron-Rich and -Deficient Olefins
作者:Nobuharu Iwasawa、Satoshi Hayakawa、Masahiro Funahashi、Koichi Isobe、Koichi Narasaka
DOI:10.1246/bcsj.66.819
日期:1993.3
Various β-carbonyl radicals are generated oxidatively from cyclopropanol derivatives by the use of manganese(III) 2-pyridinecarboxylate (Mn(pic)3). These β-carbonyl radicals react with electron-rich olefins such as conjugated silyl enol ethers, a ketene thioacetal, a ketene dithioacetal, and a vinyl ether intermolecularly to give crossed-addition products in good yield. Furthermore, the combined use
通过使用锰 (III) 2-吡啶羧酸盐 (Mn(pic)3),从环丙醇衍生物氧化生成各种 β-羰基自由基。这些 β-羰基自由基与富电子烯烃如共轭甲硅烷基烯醇醚、乙烯酮硫缩醛、乙烯酮二硫缩醛和乙烯基醚发生分子间反应,以良好的产率得到交叉加成产物。此外,Mn(pic)3和三丁基氢化锡的组合使用使得这些β-羰基与缺电子烯烃如丙烯腈、丙烯醛、丙烯酸甲酯、甲基乙烯基酮和甲基乙烯基酮的1:1加成反应成为可能。 N,N-二甲基丙烯酰胺和相应的产物以中等至良好的收率获得。