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

Publish place: Asian Journal of Green Chmistry، Vol: 1، Issue: 2
Publish Year: 1396
Type: Journal paper
Language: English
View: 145

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Link to this Paper:
https://civilica.com/doc/1747226

Document National Code:

JR_AJGC-1-2_002

Index date: 2 September 2023

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

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

Si-supported BrØnsted acids , Green reuasble catalysts , NaHSO3 , Sulfonation , aromatic compounds

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

Chinna Rajanna Kamatala

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

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. Gilbert E.E., Sulfonation and Related Reactions, Wiley, NY, ۱۹۶۵[۲]. ...
. Vivek P., Varma R.S. Chem. Res., ۲۰۰۸, ۴۱:۶۲۹[۳۰]. Oliver ...
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