SEARCH Articles Figures Tables 2- furan, Diels-Alder Diels furan Diels-Alder reaction 2- furans Furan, 2,3-dihydro-2,3-dimethylenesynthesis via retro Diels-Alder reactions Furan, 2,5-dihydro-3,4-dimethylsynthesis via retro Diels-Alder reactions Furan, tetramethylenetetrahydrosynthesis via retro Diels-Alder reactions Thieno furan via retro Diels-Alder reactions