水溶液中锌电极诱发芳香醛的还原偶联反应

Reductive Coupling Reactions of Aromatic Aldehydes Using Zinc as Electrode in Aqueous Media

以锌片为电极芳香醛为底物在酸性条件下电合成呐醇,探讨了电流密度、反应时间、盐酸浓度对产率的影响.最佳反应条件如下:电流密度2.4A/dm2,反应时间60min,盐酸用量(5mL)2mol/L,呐醇的产率范围14%～80%.

Electrosynthesis of pinacols by using zinc tablets for the electrode and aromatic aldehydes as substrate in acid condition was performed.The influence of the current density,reaction time and hydrochloric acid concentration on pinacols yield was explored.The optimal reaction conditions were as follow：current density of 2.4 A/dm^2,reaction time of 60 min,hydrochloric acid concentration of 2 mol/L,the yield of pinacols was up to 14%～80%.