SEARCH Articles Figures Tables Aminium cation radicals Diels-Alder reactions Cationic reactions Diels-Alder reactions cation radical Diels-Alder reactions cationic Diels-Alder reactions cationic heterodienes Diels-Alder reactions of radical cations Diels-Alder reactions radical cation-catalysed Hetero Diels-Alder reaction cationic Radical cations in Diels-Alder reactions Thienium cation Diels-Alder reaction Vinylcyclohexenes, radical cations retro-Diels-Alder reaction