Preparation and Characterization of Novel Nano-cellulose-OSO₃H Prepared from the Almond Shell as a Catalyst and Its Application in Synthesis of 2-Amino-3-Phenylsulfonyl-4-Aryl-4H-Benzo[h]Chromen Derivatives

Abstract

The novel nano-cellulose-OSO₃H prepared from the almond shell was synthesized via preparing mesoporous almond shell as an efficient support followed by treatment with chlorosulfonic acid (ClSO₃H). This catalyst was characterized by FT-IR, FE-SEM, TEM, EDX, BET, TGA and XRD methods. Through SEM device, the size of the cellulose-OSO₃H nanocatalyst revealed <30 nm. The catalytic activity of the solid acid catalyst has been successfully investigated in a one-pot three-component condensation reaction. In these procedures, aromatic aldehydes, α-naphthol and (phenylsulfonyl)acetonitrile were applied under solvent-free condition producing 2-amino-3-phenylsulfonyl-4-aryl-4H-benzo[h]chromen derivatives with high yields.

Keywords:

• Nano-cellulose-OSO₃H
• almond shell
• nanocatalyst
• α-naphthol
• (phenylsulfonyl)acetonitrile

Disclosure statement

No potential conflict of interest was reported by the authors.

Additional information

Funding

The research Council of the Islamic Azad University of Central Tehran and Science and Research Branch of Tehran are gratefully acknowledged for the financial support for this work.