Silica immobilized sulfuric acid ([3-(propyl)sulfanyl]propyl]ester and N-propylsulfamic acid as recyclable catalysts for chemoselective synthesis of 1,1-diacetates

Abstract

Silica immobilized sulfuric acid ([3-(propyl)sulfanyl]propyl]ester and N-propylsulfamic acid are employed as recyclable catalysts for the synthesis of 1,1-diacetates from the reaction between an aromatic aldehyde and acetic anhydride under mild- and solvent-free conditions at room temperature. These solid acids could be recycled several times without losing any catalytic activity.

Keywords:

• silica immobilized sulfuric acid ([3-(propyl)sulfanyl]propyl]ester
• silica-bonded N-propylsulfamic acid
• 1,1-diacetates
• aldehydes
• solvent-free

Acknowledgements

We are thankful to Islamic Azad University Research Council for partial support of this work, Dr Mohammad Mahdi Doroodmand for helpful comments, and University of Manchester for running BET and XRD.