反应详情

N,N-Diisopropylethylamine (99 μL, 0.566 mmol) and subsequently bromoacetonitrile (179 μL, 2.57 mmol) were added to a solution of (S)-6-azido-2-((tert-butoxycarbonyl)amino)hexanoic acid (Compound tk48) (140 mg, 0.514 mmol) in acetonitrile (0.6 mL) at room temperature under a nitrogen atmosphere. The reaction mixture was stirred at the same temperature for 3.75 hours and then concentrated under reduced pressure, and the resulting crude product was purified by normal-phase silica gel column chromatography (hexane/ethyl acetate) to afford (S)-cyanomethyl 6-azido-2-((tert-butoxycarbonyl)amino)hexanoate (Compound tk49) (175 mg, quant.).

1. concentrationconcentrated under reduced pressure
2. customthe resulting crude product was purified by normal-phase silica gel column chromatography (hexane/ethyl acetate)