ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Synthesis of 1,1-diacetates catalysed by silica-supported boron sulfonic acid under solvent-free conditions and ambient temperature

Sami Sajjadifar and Sobhan Rezayati

Department of Chemistry, Payame Noor University, 19395-4697, Tehran, Iran

E-mail: ss_sajjadifar@yahoo.com

Abstract: 1,1-Diacetates derivatives were prepared using the direct condensation of aldehydes with acetic anhydride in the presence of silica-supported boron sulfonic acid (SiO₂/B(SO₄H)₃) as a tri-functional inorganic Brønsted acid catalyst under solvent-free conditions at ambient temperature. The salient features of this methodology are: (i) cheaper process ready availability of the catalyst; (ii) versatility; (iii) high regio-selectivity of the procedure and recyclable property of the catalyst.

Keywords: silica boron sulfonic acid – acylals – aldehydes – acetic anhydride – solvent free conditions

Full paper is available at www.springerlink.com.

DOI: 10.2478/s11696-013-0480-z

Chemical Papers 68 (4) 531–539 (2014)