Trifluoroacetic acid → HCID 59863953, compound

Participants

Reaction Steps

Methyl [(2R,3S)-3-[(tert-butoxycarbonyl)amino]-4-oxo-2-phenyl-3,4-dihydro-1,5-benzoxazepin-5(2H)-yl]acetate (70a) (175 mg, 0.410 mmol) was dissolved in 5:1 (v/v) dichloromethane:trifluoroacetic acid (4 mL) and kept at ambient temperature for 30 min. The solution was evaporated and the residue was dissolved in ethyl acetate and extracted with saturated aqueous sodium bicarbonate. The organic solution was dried and evaporated and the residue used immediately in the next step.

Provenance & Evidence