Synthesis and Characterization of Nanocrystalline In₂O₃ and Its Efficacy as a Catalyst for the One Pot Synthesis of Amidoalkyl Naphthols

Abstract

In₂O₃ nanopaticles were synthesized by glycine-nitrate combustion method. The synthesized In₂O₃ is characterized by the powder X-ray diffraction and transmission electron microscopy. The average crystallite size, as determined by Scherrer's formula, was found to be about 48 nm. A catalytic amount of In₂O₃ nanopaticles, were used for an efficient synthesis of amidoalkyl naphthols via multicomponent condensation of aryl aldehydes, β-naphthol, and urea or acetamide. In₂O₃ nanopaticles were found to be highly active for the transformation with excellent yield and purity of the product in a short reaction time.

Keywords:

• amidoalkyl naphthol
• indium oxide
• multicomponent condensation
• nanocatalyst

Acknowledgments

The support of this research by Dr. A. K. Tyagi, Head, Material Chemistry Division, Bhabha Atomic Research Centre, Mumbai, and Dr. Hemlata Bagla, Vice-Principal, K.C. College, Mumbai, is gratefully acknowledged.