A class of sulfonic ionic liquids, with the supremacy of methylsulfonylimidazolium
triflate hydrochloride, was found to be efficient for catalyzing the self-condensation
of acetophenone derivatives and sulfonating the resulting condensates in a one-pot
rapid reaction leading to the synthesis of 4,6-diaryl-1,2-oxathiine-2,2-dioxides (diaryl-δ-sultones).
Key words
δ-sultone - ionic liquid - sulfonation - domino reaction - oxathiine-2,2-dioxide