Acetyl chloride → [(Z)-[(2S)-1-amino-2-[(2-methylpropan-2-yl)oxycarbonylamino]propylidene]amino] acetate

Participants

Reaction Conditions

Reaction Steps

To a mixture of tert-butyl [(1S,2Z)-2-amino-2-(hydroxyimino)-1-methylethyl]carbamate (Step 3, 100 mg, 0.5 mmol) in methylene chloride (2 mL) cooled at 0° C. was added triethylamine (0.10 mL, 0.74 mmol). To the mixture was then added acetyl chloride (42 mg, 0.54 mmol) dropwise and the reaction was warmed to room temperature. After stirring at room temperature for 1 h, the reaction was concentrated. The residue was dissolved in dichloromethane (DCM), washed with water and brine, dried over MgSO4, filtered and concentrated to afford the desired crude product (100 mg, 82.8%) which was directly used in the next step reaction without further purification. 1H-NMR (300 MHz, DMSO-d6): 6.90 (d, J=9.0 Hz, 1H), 6.22 (s, 2H), 4.05 (m, 1H), 2.01 (s, 3H), 1.36 (s, 9H), 1.20 (d, J=7.0 Hz, 3H).

Provenance & Evidence