Citation:
Zhou Chengdong, Xie Guolong, Lin Fuqin. IMPROVED METHOD OF SYNTHESIS OF COUMARIN[J]. Chinese Journal of Applied Chemistry,
;1992, 9(3): 79-82.
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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.
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