Oxidative Conversion of 3‐Alkoxyfurans to 2‐Hydroxy‐3(2<i>H</i>)‐furanones and 2‐Hydroxy‐2‐butene‐1,4‐diones with 2,3‐Dichloro‐5,6‐dicyano‐1,4‐benzoquinone (DDQ) or Phenyltrimethylammonium Tribromide (PTAB) in <i>t</i>‐BuOH
作者:Shinsei Sayama
DOI:10.1080/00397910701543036
日期:2007.9.1
Abstract 2‐Alkoxy‐1,3,4‐triphenylfurans were oxidized to 3‐alkoxy‐2,4,5‐triphenyl‐ 2‐butene‐1,4‐diones with 2,3‐dichloro‐5,6‐dicyano‐1,4‐benzoquinone (DDQ) in t‐BuOH. In contrast, various 3‐alkoxy‐2,4,5‐triphenylfurans were directly converted to 2‐hydroxy‐3(2H)‐furanone with phenyltrimethylammonium tribromide (PTAB) in t‐BuOH. The oxidative ring opening of 3‐alkoxy‐2,5‐diphenylfurans to cis‐2‐hydroxy‐2‐butene‐1