Chemical and Pharmaceutical Bulletin · 2000 · 13 citations · 0 references
Natural SciencesChemistryMedicinal ChemistryOrganic ChemistrySynthetic Medicinal ChemistryHeterocycle SynthesisHeterocyclic ChemistryOrganic SynthesisChemical Synthesis Of AnaloguesElectron-withdrawing GroupsHydrogen Cyanide ChemistryIsoquinoline AlkaloidsIsoquinoline ChemistryIsoquinoline SynthesisMedicinal Chemistry ApplicationsMedicinal Heterocycles
Diels-Alder (DA) reactions of 2(1H)-pyridones having an electron-withdrawing group at the 4-position with 2,3-dimethoxy- and 2-methoxy-1,3-butadienes gave isoquinoline derivatives. Furthermore, an isoquinoline alkaloid (6,7-dimethoxy-2-methyl-1(2H)-isoquinolone) was synthesized by elimination of hydrogen cyanide and dehydrogenation of the DA-adduct having a cyano group at the 4a-position.