Trifluoroacetic acid → HCID 68607044, compound

Participants

Reaction Steps

tert-Butyl [(2R,3S)-5-(cyclopropylmethyl)-4-oxo-2-phenyl-2,3,4,5-tetrahydro-1,5-benzoxazepin-3-yl]carbamate (72a) (201 mg, 0.492 mmol) was dissolved in 5:1 (v/v) dichloromethane:trifluoroacetic acid (5 mL) and kept at ambient temperature for 1 h. 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. MS APCI, m/z=309 (M+1). LC/MS: 1.82 min.

Provenance & Evidence