Trifluoroacetic acid → (S)-(3,5-Bis-trifluoromethyl-benzyl)-(3-methyl-isoxazol-5-yl)-(7-methyl-8-trifluoromethyl-2,3,4,5-tetrahydro-1H-benzo[b]azepin-5-yl)-amine

Participants

Reaction Steps

Add trifluoroacetic acid (10 mL) to a solution of (S)-5-[(3,5-bis-trifluoromethyl-benzyl)-(3-methyl-isoxazol-5-yl)-amino]-7-methyl-8-trifluoromethyl-2,3,4,5-tetrahydro-benzo[b]azepine-1-carboxylic acid tert-butyl ester (140 mg, 0.458 mmol) in methylene chloride (5 mL) at 0° C. under nitrogen. Warm the mixture to room temperature, stir for 4 h and pour the mixture into saturated aqueous sodium bicarbonate solution (20 mL). Extract the mixture with methylene chloride (20 mL) and wash the combined organic extracts with brine (10 mL), dry over anhydrous sodium sulfate and filter. Remove the solvent under reduced pressure to provide the title compound as a colorless oil (90 mg, 76%), which is used in the next step without purification: ESI MS m/z 552 [C25H22F9N3O+H]+.

Provenance & Evidence