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Journal of Chemical Sciences

, Volume 123, Issue 5, pp 615–621 | Cite as

ZnO nanoparticle as catalyst for efficient green one-pot synthesis of coumarins through Knoevenagel condensation

  • B VINAY KUMAR
  • HALEHATTY S BHOJYA NAIK
  • D GIRIJA
  • B VIJAYA KUMAR
Article

Abstract

Green chemistry protocols with the reusability of the nano particle as catalyst in the synthesis of coumarins is described. The zinc oxide (ZnO) nanoparticles functions as highly effective catalyst for the reactions of various o-hydroxy benzaldehydes with 1,3-dicarbonyl compounds under microwave and thermal conditions to afford the corresponding coumarins in moderate to good yields. The catalyst is inexpensive, stable, can be easily recycled and reused for several cycles with consistent activity.

Graphical Abstract

Zinc oxide (ZnO) nanoparticles functions as highly effective catalyst for the reactions of various o-hydroxy benzaldehydes with 1,3-dicarbonyl compounds under microwave and thermal conditions to afford the corresponding coumarins in moderate to good yields.

Keywords

Knoevenagel condensation o-hydroxy benzaldehyde zinc oxide (ZnO) catalyst green chemistry 

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Copyright information

© Indian Academy of Sciences 2011

Authors and Affiliations

  • B VINAY KUMAR
    • 1
  • HALEHATTY S BHOJYA NAIK
    • 1
  • D GIRIJA
    • 1
  • B VIJAYA KUMAR
    • 1
  1. 1.Department of Studies and Research in Industrial Chemistry, School of Chemical SciencesKuvempu UniversityShankaraghattaIndia

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