The Ullmann Condensation Reaction of Haloanthraquinone Derivatives with Amines in Aprotic Solvents. VI. The Combination of Cu(I) and Hydroxo or Alkoxo Cu(II) as Effective Catalyst System
作者:Sadao Arai、Yoshio Hashimoto、Takamichi Yamagishi、Mitsuhiko Hida
DOI:10.1246/bcsj.62.3143
日期:1989.10
The reaction rate of the Ullmann condensation reaction of haloanthraquinone with ethylenediamine (EN) by copper(I) halide catalyst decreased along with the formation of inactive Cu(II) species [Cu(EN)2X2] by one-electron transfer from Cu(I) to haloanthraquinone. However, the combination of Cu(I) and Cu(II) salts, having an OH, OCH3, or OCOR group, enhanced the reaction rate in the following order:
卤化铜(I)催化卤代蒽醌与乙二胺(EN)的乌尔曼缩合反应速率随着Cu(I)单电子转移形成非活性Cu(II)物种[Cu(EN)2X2]而降低) 到卤蒽醌。然而,具有 OH、OCH3 或 OCOR 基团的 Cu(I) 和 Cu(II) 盐的组合按以下顺序提高了反应速率:CuCl