1-Hydroxybenzotriazole → HCID 131731726, compound

Participants

Reaction Steps

To a mixture of (2S,5R)-6-(benzyloxy)-7-oxo-1,6-diazabicyclo[3.2.1]octane-2-carboxylic acid 1 (0.250 g, 0.905 mmol) in DCM (15.0 mL) were added tert-butyl (2-hydrazinyl-2-oxo-1-phenylethyl)carbamate 249 (0.360 g, 1.358 mmol), 1-hydroxybenzotriazole (0.186 g, 1.358 mmol) and 1-ethyl-(3-dimethylamino propyl) carbodiimide hydrochloride (0.260 g. 1.358 mmol) sequentially at room temperature. The mixture was stirred at room temperature overnight, diluted with DCM and concentrated to provide a residue which was subjected to chromatography to give 250 (0.40 g, 84%) as a white foam.

Provenance & Evidence