Synthesis of 1,5-dimethyl-1,4-dihydropyrrolo[3,4-b]-pyrrol-6(5H)-one by intramolecular Diels-Alder reaction to the imidazole nucleus.
摘要:
N-Methyl-N-propargylimidazole-5-carboxamide under goes thermal intramolecular Diels-Alder reaction to give the title compound. A related reaction of the corresponding sydnone system is also described.