methyl (3aS,4R,6S,7S,7aS)-1',7a-dimethyl-4-nitro-2,2'-dioxo-2,3,3a,5,6,7a-hexahydro-4H-spiro[benzofuran-7,3'-indoline]-6-carboxylate 在
palladium on activated charcoal 、
氢气 作用下,
以
甲醇 为溶剂,
反应 7.0h,
以70%的产率得到methyl (3aS,4S,5S,6S,7aR)-4-hydroxy-1',4-dimethyl-2,2'-dioxo-1,2,3,3a,4,6,7,7a-octahydrospiro[indole-5,3'-indoline]-6-carboxylate