Abstract
Poly(4-vinylpyridine)-supported sulfuric acid is an efficient catalyst for the Pechmann condensation of acetoacetic esters with phenols, leading to the formation of coumarins in good yields within a few minutes under solvent-free microwave conditions. The catalyst used can be recovered and reused after activation.
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The authors are thankful to CSIR, New Delhi, India, for granting a Senior Research Fellowship to KKB.
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Borah, K.J., Borah, R. Poly(4-vinylpyridine)-supported sulfuric acid: an efficient solid acid catalyst for the synthesis of coumarin derivatives under solvent-free conditions. Monatsh Chem 142, 1253–1257 (2011). https://doi.org/10.1007/s00706-011-0559-6
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DOI: https://doi.org/10.1007/s00706-011-0559-6