methyl 2-diazo-3-{1-[N-(1-methyl-1H-indol-3-yl)acetyl-N-allylcarbamoyl]cyclopropyl}-3-oxopropanoate 在
dirhodium(II) tetrakis[N-tetrachlorophthaloyl-(S)-tert-leucinate] bis(ethylacetate) 作用下,
以
三氟甲苯 为溶剂,
反应 1.08h,
以42%的产率得到spiro[endo-1-allyl-9,11a-epoxy-9-methoxycarbonyl-8-methyl-2,3,8,8a,9,10,11,11a-octahydro-1H-pyrrolo[2,3-d]carbazole-2,10-dione-11,1'-cyclopropane]