Silica-supported HClO4 and KHSO₄ as reusable green catalysts for sulfonation of aromatic compounds under solvent-free conditions

Publish Year: 1396
نوع سند: مقاله ژورنالی
زبان: English
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شناسه ملی سند علمی:

JR_AJGC-2-2_002

تاریخ نمایه سازی: 22 اردیبهشت 1397

Abstract:

A green protocol is described for sulfonation of aromatic compounds that has been accomplished using sodium bisulfite (NaHSO₃) in the presence of reusable green heterogeneous SiO₂/HClO₄ and SiO₂/KHSO₄ (Silica- supported HClO₄ and KHSO₄ catalysts) under conventional and solvent- free microwave irradiation. The reactions afforded very good yields of products within 3 to 5 hour under conventional conditions. However, the reaction times in microwave-assisted protocol are drastically reduced to 3 to 5 minutes (from 3 to 5 hour under conventional conditions) followed by increasing product yields. Moreover, the developed silica-supported catalysts could be recycled for at least three to four times.

Authors

Touheeth Fatima

Department of Chemistry, Osmania University, Hyderabad (T.S)-۵۰۰۰۰۷ India

Yeike Hemanth Sriram

Department of Chemistry, Osmania University, Hyderabad (T.S)-۵۰۰۰۰۷ India

Mukka Satish Kumar

Department of Chemistry, Osmania University, Hyderabad (T.S)-۵۰۰۰۰۷ India

Marri Venkateswarlu

Department of Chemistry, Osmania University, Hyderabad (T.S)-۵۰۰۰۰۷ India