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
摘要 2-烷氧基-1,3,4-三苯基呋喃与2,3-二氯-5,6-二氰基-1 氧化成3-烷氧基-2,4,5-三苯基-2-丁烯-1,4-二酮,4-苯醌 (DDQ) 的 t-BuOH。相比之下,各种 3-烷氧基-2,4,5-三苯基呋喃在 t-BuOH 中用苯基三甲基三溴化铵 (PTAB) 直接转化为 2-羟基-3(2H)-呋喃酮。3-烷氧基-2,5-二苯基呋喃氧化开环成顺式-2-羟基-2-丁烯-1,4-二酮也是在相同的反应条件下用PTAB在t-BuOH中完成的。