Chinese Journal of Applied Chemistry ›› 1992, Vol. 0 ›› Issue (3): 79-82.

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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

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