journal6 ›› 2007, Vol. 28 ›› Issue (1): 114-117.

• 化学化工 • 上一篇    下一篇

磷钨酸/活性炭催化合成7-羟基-4-甲基香豆素

  

  1. (湖南科技学院化生系,湖南 永州 425100)
  • 出版日期:2007-01-25 发布日期:2012-06-19
  • 作者简介:刘芳(1972-),女,湖南衡山人,湖南科技学院实验师,硕士生,主要从事精细化学品研究.
  • 基金资助:

    湖南省自然科学基金资助项目(06JJ50021)

Catalytic Synthesis of 7-Hydroxy-4-Methyl Coumarin by Activated Carbon Supported Phosphotungstic Acid

  1. (Department of Chemistry and Biology,College of Science and Technology of Hunan,Yongzhou 425100,Hunan China)
  • Online:2007-01-25 Published:2012-06-19

摘要:7-羟基-4-甲基香豆素是一种重要的医药化工中间体.笔者研究了活性炭负载磷钨酸催化合成7-羟基-4-甲基香豆素的反应,考察了反应的各种影响因素,通过单因素实验得到合成7-羟基-4-甲基香豆素的最佳工艺条件:n(间苯二酚) :n(乙酰乙酸乙酯)=1∶1;反应温度为100 ℃;反应时间为3 h;磷钨酸/活性碳的负载比为22.3%,用量为0.15 g;收率达74.3%.

关键词: 7-羟基-4-甲基香豆素, 活性炭, 磷钨酸, 合成

Abstract: 7-hydroxy-4-methyl coumarin as chemical or medical intermediates is very important in industry.The synthesis of 7-hydroxy-4-methyl coumarin was studied using activated carbon supported phosphotungstic acid as catalyst.The effects of various factors on the reaction were discussed in detail.The optimum conditions were obtained for industrialization.The molar ratio of resorcin to acetyl ethyl acetate was 1:1,reaction temperature is 100 ℃,reaction time is 3 h,the amount of loaded phosphotungsic acid is 22.3%,the catalyst dosage is 0.15 g.The yield reached 73.4%.

Key words: 7-hydroxy-4-methyl coumarin, activated carbon, phosphotungstic acid;synthesis

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