邻羟基苯甲醛和对羟基苯甲醛的制备

Preparation of o- and p- Hydroxybenzaldehyde

采用改进的赖默—梯曼法制备邻羟基苯甲醛并对羟基苯甲醛进行研究。确定了该反应的最佳条件为:T=45～55℃,n(NaOH):n(苯酚):n(氯仿)=3:1.2:1(物质的量比)。在此条件下,目标产物收率可达90％。

The preparation of o - and p - hydroxybenzaldehyde through the improved Reimer - Tieman reaction was studied. The optimum technological conditions were determined, i. e. the reaction was conducted at 45～55℃ and n(NaOH): n(phenol): n(CHCl_3)= 3:2:1.