Homogeneous aqueous oxidation of organic molecules by Oxone® and catalysis by a water-soluble manganese porphyrin complex
作者:Tu-Cai Zheng、David E. Richardson
DOI:10.1016/0040-4039(94)02420-g
日期:1995.2
Peroxymonosulfate (KHSO5) oxidizes a wide variety of water-soluble organic molecules in aqueous solutions, and the reactions are generally more rapid in phosphate buffer (pH 6–7) than in pure water. A water-solubleporphyrin complex, meso-tetrakis(4-N-methylpyridyl)porphyrinatomanganese(III) chloride, catalyzes epoxidation and hydroxylation under neutral pH conditions.
High 1,2-Asymmetric Induction in Radical Reactions: Radical Addition to<i>γ</i>-Hydroxy<i>α</i>,<i>β</i>-Unsaturated Carboxylic Esters and Sulfones
作者:Katsuyuki Ogura、Akio Kayano、Motohiro Akazome
DOI:10.1246/bcsj.70.3091
日期:1997.12
High 1,2-asymmetric induction was realized by the addition of a 1-hydroxy-1-methylethyl radical to conformationally flexible (E)-γ-hydroxy α,β-unsaturated carboxylic esters and sulfones (1 and 2, respectively). Upon the irradiation (> 290 nm) of (E)-1 and benzophenone in 2-propanol, the 1-hydroxy-1-methylethyl radical was generated in situ and added to (E)-1 with high anti-stereoselectivity. The bulkier