反应详情

To a mixture of (2S,5R)-6-(benzyloxy)-7-oxo-1,6-diazabicyclo[3.2.1]octane-2-carboxylic acid 1 (0.150 g, 0.543 mmol) in DCM (15 mL) were added tert-butyl [(1S)-2-(aminooxy)-1-methylethyl]carbamate 59 (0.176 g, 0.923 mmol), 1-hydroxybenzotriazole (0.110 g, 0.814 mmol) and 1-ethyl-(3-dimethylaminopropyl) carbodiimide hydrochloride (0.156 g, 0.814 mmol) sequentially at room temperature. The mixture was stirred at room temperature for 18 h, diluted with DCM, washed with water and brine, dried over sodium sulfate and concentrated to provide a residue which was subjected to chromatography to give 60 (0.237 g, 97%) as a white solid.

1. washwashed with water and brine
2. dry with materialdried over sodium sulfate
3. concentrationconcentrated
4. customto provide a residue which