Chinna Rajanna Kamatala - Department of Chemistry, Osmania University, Hyderabad (T.S)-۵۰۰۰۰۷ India
Hemanth Sriram Y. - Department of Chemistry Osmania University Hyederabad -(T.S) ۵۰۰۰۰۷ India
Satish Kumar Mukka - Department of Chemistry Osmania University Hyderabad-(T.S) India
Venkateswarlu Marri - Department of Chemistry Osmania Univerity Hyderabad-(T.S) India

Reusable silica supported perchloric acid and potassium bisulphate have been prepared and explored as green catalysts for thiocyanation of aromatic compounds under conventional and solvent free microwave assisted conditions. The microwave assisted protocol exhibited remarkable rate accelerations and offered selective thiocyanation of aromatic and hetero aromatic compounds in good yields. Reaction times observed in conventional methods range of 2.0 to 6.0 hours, which reduced to only few minutes (1 to 3 min) in microwave assisted reactions. The developed protocols are also promising and comparable with the existing procedures. Prepared catalysts could be easily recycled for five time with a reproducible efficiency.

Silica supported Potassium bisulfate, silica supported HClO4, ammonium thiocyanate, selective thiocyanation, solvent free microwave assisted reactions, rate accelerations