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ABSTRACT
Silica-supported perchloric acid and bisulfate (SiO2/HClO4 and SiO2/KHSO4) have been developed as reusable green catalysts for nitration of aromatic compounds using NaNO2 in acetonitrile medium under conventional and solvent-free microwave conditions. The reaction times under microwave irradiation are significantly shorter than conventional method even though the yields obtained in microwave-assisted reactions are comparable with those obtained under reflux conditions.
GRAPHICAL ABSTRACT
Acknowledgment
The authors are grateful to the Head (Chemistry Department), Osmania University Hyderabad for constant support and encouragement.