中文摘要：

[方法]1-（4-氯苯基）-3-吡唑醇是一种重要农药中间体,以对氯苯肼为原料经环合、氧化,合成1-（4-氯苯基）-3-吡唑醇。[结果]在优化的反应条件下,1-（4-氯苯基）-3-吡唑醇的反应总收率为72.5%（以对氯苯肼计）,含量为99.2%,其结构经红外和氢谱核磁分析确证。[结论]该工艺具有反应条件温和、产品收率高等优点,适合工业化生产。

英文摘要：

[Methods]As an important intermediate of pesticides,1-（4-chlorophenyl）pyrazolidin-3-one could besynthesized by the cyclization and oxidation from the raw material 4-chlorophenylhydrazine.[Results]Under the optimalcondition,the total yield was 72.5%based on 4-chlorophenylhydrazine and the purity was 99.2%.The structure of theresulting product was confirmed by IR and1H NMR.[Conclusions]The process exhibited mild reaction conditions andhigh yield,and is suitable for industrial production.