SO3H-functionalized ionic liquids have been employed as an alternative reaction medium to conventional acid catalysts for oligomerization of various olefins, to produce branched olefin derivatives in high conversions and excellent selectivity. The ionic liquid plays a dual role as both catalyst and solvent, providing an efficient and reusable acidic catalyst system for the oligomerization of olefins.

★★★☆☆ Y. Gu et al. / Catalysis Communications 4 (2003) 597–601.