N,N-dimethylhydroxylamine hydrochloride → HCID 67422874, compound

Participants

Reaction Steps

A solution of (4R)-4-(benzyloxy)-1-(tert-butoxycarbonyl)-L-proline (6.43 g, 20.0 mmol), dimethylhydroxylamine hydrochloride (2.34 g, 24.0 mmol), and diisopropylethylamine (4.18 mL, 24.0 mmol) in dichloromethane (65 mL) was added with N-(3-dimethylaminopropyl)-N′-ethylcarbodiimide hydrochloride (4.60 g, 24.0 mmol) and 1-hydroxybenzotriazole hydrate (3.68 g, 24.0 mmol) under ice cooling and stirred at room temperature for 16 hours. The reaction solution was added with saturated aqueous sodium hydrogen carbonate solution (10 mL) and water (50 mL) for quenching followed by extraction with dichloromethane. The organic layer was washed with saturated brine and dried over anhydrous magnesium sulfate. The solvent was distilled off under reduced pressure. The residue was purified by silica gel chromatography (n-hexane/ethyl acetate=45/55) to give the title compound as a colorless oily substance (7.15 g, yield 98%).

Provenance & Evidence