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Phosphotungstic Acid: An Efficient Catalyst for the Aqueous Phase Synthesis of Bis(4-hydroxycoumarin-3-yl)methanes

Phosphotungstic Acid: An Efficient Catalyst for the Aqueous Phase Synthesis of Bis(4-hydroxycoumarin-3-yl)methanes,10.1007/s10562-009-0239-x,Catalysis

Phosphotungstic Acid: An Efficient Catalyst for the Aqueous Phase Synthesis of Bis(4-hydroxycoumarin-3-yl)methanes  
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In this present work, we report that phosphotungstic acid provides a simple, efficient and environmentally benign route is a two-component one-pot domino Knoevenagel-type condensation/Michael reaction between 4-coumarin derivative and an aldehyde in water as a solvent in shorter duration with high yields.
Journal: Catalysis Letters - CATALYSIS LETT , vol. 134, no. 3, pp. 303-308, 2010
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