Efficient Synthesis of Bis-Coumarins Using Silica-Supported Preyssler Nanoparticles

Abstract

Reaction of aldehydes and 4-hydroxycoumarin in the presence of catalytic amount of silica-supported Preyssler nanoparticles led to synthesis of bis-coumarins in excellent yields.

Keywords:

• Bis-coumarin
• heteropolyacids
• recyclable catalyst

ACKNOWLEDGMENT

The authors are thankful to Azzahra University Research Council for the partial financial support.

Notes

^a Yields of isolated products.

^a Yields refer to isolated products.

^a Yields refer to isolated products.

^a Yields refer to isolated products.

^a Yields refer to isolated products.

^a Yields of isolated products.

^a Yields refer to isolated products.