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Silica Supported Acids (SiO2-HClO4, SiO2-KHSO4) as Eco-Friendly Reuasble Catalysts for Bromination of Aromatic and Heteroaromatic Compounds Using KBr under Solvothermal and Solvent-Free Conditions

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Abstract

Silica supported acids like Si-KHSO4, and Si-HClO4 are explored as reusable nano green catalysts for bromination of aromatic and hetero aromatic compounds using KBr under solvothermal, and solvent-free conditions. Reaction times reduced from (4–6) hours under conventional solvothermal protocols to (9–12) minutes under ultrasonic sonucation for completion. But, solvent-free microwave assisted reactions required only (1–5) minutes exhibiting striking rate accelerations compared to the solvothermal and ultrasonic assisted protocols. All the reaction protocols afforded fairly good yields of brominated products, which are comparable with existing protocols.

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Acknowledgements

Authors gratefully acknowledge Head, Department of Chemistry, Osmania University, Hyderabad for facilities. Authors are grateful to Professor P. K. Saiprakash (Former Dean, Faculty of Science, O.U)), and Prof. Authors are grateful to Professor P. K. Saiprakash (Former Dean, Faculty of Science, O.U)), and Prof. T.Navaneeth Rao (former Vice-chancellor, O.U), for constant encouragement. Authors are thankful to CSIR-IICT, Hyderabad, and Central Instrumentation Centre, O.U. for providing spectroscopic and BET studies.

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Funding is not reecieved specifically for this work. However, one of the authors (Vijay Shekar Pulusu) is highly thankful to CSIR, New Delhi for the award of Junior Research Fellowship.

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  1. Department of Chemistry, Osmania University, Hyderabad, T.S, 500 007, India

    Vijay Shekar Pulusu, Chinna Rajanna Kamatala, Anil Kumar Mardhanpally, Hemanth Sriram Yelike, Yaku Gugulothu, Satish Kumar Mukka, Umesh Kumar Utkoor & Yadagiri Pulusu

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Pulusu, V.S., Kamatala, C.R., Mardhanpally, A.K. et al. Silica Supported Acids (SiO2-HClO4, SiO2-KHSO4) as Eco-Friendly Reuasble Catalysts for Bromination of Aromatic and Heteroaromatic Compounds Using KBr under Solvothermal and Solvent-Free Conditions. Silicon 14, 7781–7791 (2022). https://doi.org/10.1007/s12633-021-01489-3

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