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Silica sulfuric acid catalyzes efficiently the reaction of carbamates and oxazolidinones with anhydrides under solvent-free conditions. All the reactions were done at room temperature and the N-acyl carbamates and oxazolidinones were obtained with high yields and purity via an easy work-up procedure. This method is attractive and is in a close agreement with green chemistry. KEY WORDS : N-Acyl carbamates, N-Acyl oxazolidinones, Silica sulfuric acid, Solvent-free Bull. Chem. Soc. Ethiop. 2011 , 25(1), 151-155.

bulletin of the chemical society of ethiopia

&lt;b&gt;Silica sulfuric acid: a versatile and reusable heterogeneous catalyst for the synthesis of N-acyl carbamates and oxazolidinones under solvent-free conditions&lt;/b&gt;