SEARCH Articles Figures Tables 2.6- Dimethyl-4/7-pyran Acetylenedicarboxylate Acetylenedicarboxylates Diels-Alder reaction dimethyl acetylenedicarboxylate Dimethyl Diels-Alder Dimethyl acetylenedicarboxylate, reaction with Dimethyl reactions Pyran Diels-Alder reaction Pyran reactions Pyrans, 3,4-dihydroreaction with dimethyl acetylenedicarboxylate Pyrans, reaction with