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|Title:||Synthesis of coumarin by Yb(OTf)3 catalyzed Pechmann reaction under the solvent-free conditions|
|Abstract:||Yb(OTf)3 is used as an alternative to conventional acid catalysts in the Pechmann condensation reaction of phenols with β-keto esters leading to the formation of coumarin derivatives. This new method has the advantage of high yields, solvent-free conditions, short reaction times and reusability of the catalyst with no loss of yield. Ytterbium triflate catalyzed Pechmann reaction applied to synthesis of coumarin derivatives is simple and environmentally friendly process.|
|Appears in Collections:||IJC-B Vol.42B(09) [September 2003]|
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|IJCB 42B(9) 2097-2099.pdf||151.47 kB||Adobe PDF||View/Open|
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