Tetrahedron Letters

Silica-bonded S-sulfonic acid as a recyclable catalyst for chemoselective synthesis of 1, 1-diacetates

K Niknam, D Saberi, MN Sefat

Index: Niknam, Khodabakhsh; Saberi, Dariush; Sefat, Maryam Nouri Tetrahedron Letters, 2009 , vol. 50, # 28 p. 4058 - 4062

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Citation Number: 68

Abstract

A simple and efficient procedure for the preparation of silica-bonded S-sulfonic acid (SBSSA) by reaction of 3-mercaptopropylsilica (MPS) and chlorosulfonic acid in chloroform is described. This solid acid is employed as a recyclable catalyst for the synthesis of 1, 1- diacetates from aromatic aldehydes and acetic anhydride under mild and solvent-free conditions at room temperature.