Triethylamine → HCID 76568160, compound

Participants

Reaction Conditions

Reaction Steps

To a solution of racemic (2′R,3R,4′S)-2′-[3-bromo-2-fluoro-6-(2-hydroxy-ethoxy)-phenyl]-6-chloro-4′-(3-chlorophenyl)spiro[3H-indole-3,3′-piperidine]-2,6′(1H)-dione (0.12 g, 0.202 mmol) prepared in example 183d in N,N-dimethyl formamide (1 mL) was added ethynyl-trimethyl-silane (0.28 mL, 2.0 mmol) (Aldrich) and triethylamine (0.127 g, 2.0 mmol). After the reaction mixture was degassed for 5 min, dichloro-bis-(triphenyl-phosphine) (14 mg, 0.02 mmol) (Strem) was added and the reaction mixture was heated at 100° C. under nitrogen for overnight. The reaction mixture was cooled to room temperature and diluted with water, extracted with ethyl acetate. The organic layers were combined, washed with water, brine, dried over MgSO4, filtered and concentrated. The residue was purified with chromatography to give racemic (2′R,3R,4′S)-6-chloro-4′-(3-chlorophenyl)-2′-[2-fluoro-6-(2-hydroxy-ethoxy)-3-trimethylsilanylethynyl-phenyl]spiro[3H-indole-3,3′-piperidine]-2,6′(1H)-dione as brown solid (Yield: 50 mg, 40.6%).

Provenance & Evidence