Catalysis letters

Phosphotungstic acid: an efficient catalyst for the aqueous phase synthesis of bis-(4-hydroxycoumarin-3-yl) methanes

P Singh, P Kumar, A Katyal, R Kalra, SK Dass…

Index: Singh, Prashant; Kumar, Pradeep; Katyal, Anju; Kalra, Rashmi; Dass, Sujata K.; Prakash, Satya; Chandra, Ramesh Catalysis Letters, 2010 , vol. 134, # 3-4 p. 303 - 308

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Citation Number: 33

Abstract

Abstract 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.