1-Hydroxybenzotriazole → HCID 86694078, compound

Participants

Reaction Steps

To a solution of (2S,5R)-6-(benzyloxy)-7-oxo-1,6-diazabicyclo[3.2.1]octane-2-carboxylic acid (0.25 g, 0.90 mmol) in dry DCM (30 mL) were added tert-butyl 3-(hydrazinylcarbonyl)azetidine-1-carboxylate 259 (0.29 g, 1.35 mmol), 1-hydroxybenzotriazole (0.19 g. 1.35 mmol), 1-ethyl-(3-dimethylaminopropyl)carbodiimide hydrochloride (0.26 g, 1.35 mmol) and 4-(dimethylamino)pyridine (0.16 g, 1.35 mmol) at room temperature. The reaction mixture was stirred at room temperature overnight and concentrated under vacuum. The residue was purified by column chromatography to give tert-butyl 3-[(2-{[(2R,5S)-6-(benzyloxy)-7-oxo-1,6-diazabicyclo[3.2.1]oct-2-yl]carbonyl}hydrazinyl)carbonyl]azetidine-1-carboxylate 260 (0.35 g, 81%) as a white solid.

Provenance & Evidence