(S)-methyl 2-(4-diazo-5-ethoxy-3,5-dioxopentyl)-1,2,3,4-tetrahydroisoquinoline-3-carboxylate 在
copper acetylacetonate 作用下,
以
5,5-dimethyl-1,3-cyclohexadiene 为溶剂,
反应 1.17h,
以14%的产率得到11a-O-ethyl 5-O-methyl (5S)-1-oxo-3,5,6,11-tetrahydro-2H-pyrrolo[2,1-b][3]benzazepine-5,11a-dicarboxylate