Trifluoroacetic acid → racemic (2'R,3R,4'S)-6-chloro-4'-(3-chlorophenyl)-1'-ethyl-2'-(2-methylphenyl)spiro[3H-indole-3,3'-piperidine]-2,6'(1H)-dione

Participants

Reaction Steps

In a manner similar to the method described in example 24d, racemic (2′R,3R,4′S)-6-chloro-4′-(3-chlorophenyl)-1′-ethyl-2,3-dihydro-2′-(2-methylphenyl)-2,6′-dioxospiro[indole-3,3′-piperidine]-1-carboxylic acid tert-butyl ester (0.2 g, 0.34 mmol) prepared in example 26a was reacted with trifluoroacetic acid in dichlormethane to give racemic (2′R,3R,4′S)-6-chloro-4′-(3-chlorophenyl)-1′-ethyl-2′-(2-methylphenyl)spiro[3H-indole-3,3′-piperidine]-2,6′(1H)-dione as an off-white foam (Yield: 0.11 g, 69%).

Provenance & Evidence