Journal
JOURNAL OF THE CHINESE CHEMICAL SOCIETY
Volume 61, Issue 2, Pages 213-216Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/jccs.201200610
Keywords
Coumarin; Y(NO3)(3)center dot 6H(2)O; Solvent-free conditions; Pechmann condensation
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Several substituted coumarins can be prepared in high yield and purity by direct reaction of beta-keto esters and phenol derivatives in the presence of a catalytic amount Y(NO3)(3)center dot 6H(2)O as Lewis acid and at ambient temperature under solvent-free conditions.
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