The preparation and characterization of flower-like boehmite nanoparticles-SA: A new and reusable nanocatalyst for the synthesis of 2-aryl-1H-benzimidazoles

ABSTRACT

The efficient synthesis of 2-arylbenzimidazole derivatives is described by condensation of aldehydes and o-phenylenediamines in a single pot using AlOOH-SO3 nanoparticles (BNPs'SA) as a catalytic in excellent isolated yields. The variables investigated such as the amount of catalyst, reaction temperature, and the effect of various solvents are studied. Structural properties of BNPs'SA are characterized by powder X-ray diffraction, Field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), and FT-IR spectroscopy. The average of crystalline size of AlOOH-SO3 nanoparticles is 30–50 nm. The present procedure offers several advantages such as short reaction time, simple workup, recovery, and reusability of the catalyst.

KEYWORDS:

• Nano boehmite
• sulfonic acid
• nano catalyst
• green chemistry
• benzimidazoles
• mild conditions

Acknowledgments

The authors are thankful to the Islamic Azad University branch of Kermanshah for the partial support for this work.