N'-[(S)-1-((2E,4E)-Hexa-2,4-dienoyl)-pyrrolidine-2-carbonyl]-hydrazinecarboxylic acid tert-butyl ester 在
lead(IV) acetate 作用下,
以
苯 为溶剂,
以60%的产率得到(2R,4aR,9aS)-2-Methyl-5,10-dioxo-4a,5,8,9,9a,10-hexahydro-2H,7H-pyrrolo[1',2':4,5]pyrazino[1,2-b]pyridazine-1-carboxylic acid tert-butyl ester