**Chapter 5**

*Nanocatalysts*

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2006;**184**(3):313-321

2003

Vch; 2007

**54**

Eco-Friendly and Facile Synthesis of Substituted Imidazoles via Nano Zirconia Catalyzed One-Pot Multicomponent Reaction of Isatin Derivatives with Ammonium Acetate and Substituted Aromatic Aldehydes under Solvent Free Conditions

*Sundaram Singh and Shivam Bajpai*
