Ethyl Acetate → HCID 86654951, compound

Participants

Reaction Conditions

Reaction Steps

To a solution of (2-cyano-4-trifluoromethylphenylamino)acetic acid tert-butyl ester 5B (11.7 g, 39.0 mmol) in anhydrous THF (60 mL) and anhydrous DMF (60 mL) at 0° C. was added potassium tert-butoxide (8.74 g, 78.0 mmol). The reaction mixture was stirred at 0° C. for 5 minutes and benzyl chloroformate 5C (10 g, 58.7 mmol) was added. The reaction mixture was stirred at room temperature for 4 hours. Ethyl acetate (500 mL) was added and the organic layer was washed with water and brine. The organic layer was dried over sodium sulfate. The organic solvent was evaporated under reduced pressure. The crude product was purified by flash column chromatography to provide 3-amino-1-benzyloxycarbonyl-5-trifluoromethylindole-2-carboxylic acid tert-butyl ester 5D (5.96 g, 13.7 mmol).

Provenance & Evidence