SEARCH Articles Figures Tables Acid-catalyzed Diels-Alder reaction Diels acid Diels stereoselective Diels-Alder reaction acids Diels-Alder reactions stereoselection Lewis acid catalyzed reaction Lewis acid-catalyzed Lewis acid-catalyzed Diels-Alder Lewis acids Diels-Alder reaction Lewis catalyzed Lewis reactions Reaction stereoselectivity Stereoselective reactions Stereoselective reactions Diels-Alder reaction Stereoselectivity acids