Perfluorobutanesulfonic acid and other fluorine-free acid as Bronsted catalyst in alkylation reactions. II. Alkylation of toluene

The catalytic performance of perfluorobuanesulfonic acid in the alkylation of toluene when oxygen.containing compound such as alcohols, ethers, esters or ketones were used as alkylating agents is here compared with the behaviour of other fluorine.free acids, as phosphoric acid, methanesulfonic acid, p-toluenesulfonic acid, BBr3.