聚乙二醇相转移催化合成2,4-二硝基苯酚

Synthesis of 2,4-dinitrophenol using polyethylene glycol as a phase transfer catalyst

在醋酸、相转移催化剂聚乙二醇存在下,苯酚与硝酸铈铵反应生成2,4-二硝基苯酚。聚乙二醇作为相转移催化剂可以提高反应的选择性。最佳反应条件为:苯酚与硝酸铈铵的物质的量比为1∶1.05,反应温度为50℃,反应时间为1.5 h,产率达72%。

In the presence of acetic acid and polyethylene glycoL, phenol reacted with ceric ammonium nitrate to from 2,4-dinitrophenol. As a phase transfer catalyst, polyethylene gLycoL could improve the selectivity of the reaction. The results showed that when the molar ratio of phenol to cefic ammonium nitrate was 1 ： 1.05, the yield d 2,4-dinitrophenul was 72% at a reaction temperature of 50 ℃ and a reaction time of 1.5 h.