We have found that combination of acetic anhydride as acylating agent and catalytic amount of Poly(4-vinylpyridinium tribromide) could be an efficient protocol for conversion of aldehydes into their corresponding 1,1-diacetates.It was observed that solvent free condition is the best media for the synthesis of acylals. Therefore, we wish to report a convenient method for the effective conversion of aldehydes to their corresponding 1,1-diacetates by using Ac2O and catalytic amount of PVP-Br3 under solvent-free conditions, as depicted in Scheme 1.
