A Novel Synthesis Including Asymmetric Synthesis of α,β-Unsaturated γ-Hydroxy Carbonyl Compounds from Enones with Carbon Homologation
作者:Tsuyoshi Satoh、Shigeyasu Motohashi、Norio Tokutake、Koji Yamakawa
DOI:10.1246/bcsj.65.2966
日期:1992.11
α-phenylthio β,γ-unsaturated carbonyl compound through an α,β-epoxy sulfoxide. Oxidation of the sulfide with 2.1 equivalents of m-chloroperbenzoic acid gave α,β-unsaturated γ-phenylsulfinyloxy carbonyl compound via sulfoxide-sulfenate rearrangement. The sulfinate was easily hydrolyzed with aqueous potassium hydroxide to afford α,β-unsaturated γ-hydroxy carbonyl compound in good yield. When optically active
衍生自 1-氯烷基芳基亚砜的碳负离子与烯酮反应以良好的产率得到 1,2-加合物。用苯硫醇钾处理加合物,通过α,β-环氧亚砜得到α-苯硫基β,γ-不饱和羰基化合物。用 2.1 当量的间氯过苯甲酸氧化硫化物,通过亚砜-次磺酸盐重排得到 α,β-不饱和 γ-苯基亚磺酰氧基羰基化合物。亚磺酸盐很容易用氢氧化钾水溶液水解,以良好的收率得到α,β-不饱和γ-羟基羰基化合物。当在此过程中使用旋光 (-)-1-氯代烷基对甲苯基亚砜时,合成了具有中等至良好旋光纯度的旋光 α,β-不饱和 γ-羟基羰基化合物。