1-O-tert-butyl 2-O-[2-[4-[7-[4-[2-[(2S,4S)-4-methyl-1-[(2-methylpropan-2-yl)oxycarbonyl]pyrrolidine-2-carbonyl]oxyacetyl]phenyl]spiro[1,3-dihydroindene-2,1'-cyclopentane]-4-yl]phenyl]-2-oxoethyl] (2S,4S)-4-methylpyrrolidine-1,2-dicarboxylate 在
ammonium acetate 作用下,
以
5,5-dimethyl-1,3-cyclohexadiene 为溶剂,
反应 12.0h,
以69.5%的产率得到tert-butyl (2S,4S)-4-methyl-2-[5-[4-[7-[4-[2-[(2S,4S)-4-methyl-1-[(2-methylpropan-2-yl)oxycarbonyl]pyrrolidin-2-yl]-1H-imidazol-5-yl]phenyl]spiro[1,3-dihydroindene-2,1'-cyclopentane]-4-yl]phenyl]-1H-imidazol-2-yl]pyrrolidine-1-carboxylate