Triethylamine → HCID 59656614, compound

Participants

Reaction Steps

A solution of 4-nitrophenyl chloroformate (300 mg, 1.49 mmol, 1.2 equiv) in THF (10 mL) was added drop wise to a stirred solution of (1S)-1-{[(2S)-4-(2,5-difluorophenyl)-2-phenyl-2,5-dihydro-1H-pyrrol-1-yl]-carbonyl}-2,2-dimethylpropylamine (6-1, 460 mg, 1.24 mmol, 1.0 equiv) and triethylamine (151 mg, 1.49 mmol, 1.2 equiv) in THF (10 mL) at 23° C. After 1 hr the reaction was filtered and the filtrate concentrated to a pale yellow gum which was purified by flash chromatography on silica gel. Elution with dichloromethane to 3% ethyl acetate/dichloromethane provided 2-hydroxyethyl (1S)-1-{[(2S)-4-(2,5-difluorophenyl)-2-phenyl-2,5-dihydro-1H-pyrrol-1-yl]carbonyl}-2,2-dimethylpropylcarbamate (9-1) as a colorless foam LRMS m/z (M+H) 536.5 found, 535.2 required.

Provenance & Evidence