反应详情

In a manner similar to the method described in example 24d, racemic 2′R,3R,4′S)-6-chloro-4′-(3-chlorophenyl)-2,3-dihydro-1′-[(methoxycarbonyl)-methyl]-2′-(2-methylphenyl)-2,6′-dioxospiro[indole-3,3′-piperidine]-1-carboxylic acid tert-butyl ester (0.37 g, 0.59 mmol) prepared in example 29a was reacted with trifluoroacetic acid (20 mL) in dichlormethane to give racemic (2′R,3R,4′S)-6-chloro-4′-(3-chlorophenyl)-1′-[(methoxycarbonyl)-methyl]-2′-(2-methylphenyl)spiro[3H-indole-3,3′-piperidine]-2,6′(1H)-dione as a white solid (Yield: 0.21 g, 67%).