应用化学 ›› 1992, Vol. 0 ›› Issue (3): 79-82.

• 研究简报 • 上一篇    下一篇

香豆素合成工艺的改进

周成栋, 谢国龙, 林富钦   

  1. 湘潭大学化学系, 湘潭 411105
  • 收稿日期:1991-07-23 修回日期:1991-09-18 出版日期:1992-06-10 发布日期:1992-06-10

IMPROVED METHOD OF SYNTHESIS OF COUMARIN

Zhou Chengdong, Xie Guolong, Lin Fuqin   

  1. Department of Chemistry, Xiangtan University, Xiangtan 411105
  • Received:1991-07-23 Revised:1991-09-18 Published:1992-06-10 Online:1992-06-10

摘要: 香豆素是一种用途广泛的香料,虽然已有多种合成方法[1-4],但国内仍采用以水杨醛为原料的路线(产率为60%左右),提高产率是改进其合成工艺的关键。我们曾以氟化钠代替乙酸钠作催化剂,以水杨醛和乙酐为原料合成了香豆素,提高了产率[5-6]。本文又采用两个改进措施:将原工艺的一次投料改为两次投料,用CH3COO的催化活性。这使反应条件温和,操作简便,PEG为相转移催化剂以提高F-或产率提高。

关键词: 香豆素, 聚乙二醇, 氟化钾, 乙酸钾, 相转移催化

Abstract: The synthesis of coumarin has been improved with good yield by yarying the adding order of the starting materials and using polyethylene glycol as phase transfer catalyst. Optimum molar ratios were salicylaldehyde: acetic anhydride: potassium acetate=1:3.7:0.5 and salicylaldehyde:acetic anhydride:potassium fluoride=1:3.7:0.35.

Key words: coumarin, polyethlene glycol, potassium fluoride, potassium acetate, phase transfer catalysis