SEARCH Articles Figures Tables Acid enhancement Acid-catalyzed Diels-Alder reaction Diels acid Diels-Alder reaction acids Diels-Alder reaction rate enhancement Diels-Alder reactions rates Enhancer reaction Lewis acid catalyzed reaction Lewis acid-catalyzed Lewis acid-catalyzed Diels-Alder Lewis acids Diels-Alder reaction Lewis catalyzed Lewis reactions Rate enhancement Reaction rate enhancement