Air-stable titanocene bis(perfluorooctanesulfonate) as a new catalyst for acylation of alcohols, phenols, thiols, and amines under solvent-free condition

An air-stable titanocene bis(perfluorooctanesulfonate) of high Lewis acidity was synthesized and examined as a catalyst for acylation reactions. It shows high catalytic activity and selectivity towards the acylation of various alcohols, phenols, thiols, and amines under mild solvent-free reaction conditions. Moreover, it has good stability and can be reused without loss of activity in a test of ten cycles.