Process for the production of lactones

摘要

The invention is directed to a process for the lactonization of carboxylic acids, wherein unsaturated carboxylic acids and/or 4-hydroxylsubstituted carboxylic acids with at least 7 carbon atoms are reacted in the presence of a fluorinated alkane sulfonic acid or salts thereof, preferably in the presence of a trifluoromethanesulfonic acid or salts thereof.