反应详情

While under an atmosphere of argon, a room temperature solution of 4-(tert-butoxycarbonylamino) butanoic acid (20 g, 0.098 mol) in dichloromethane (280 mL, 0.35 M) was treated with CDI (17.6 g, 0.108 mol). After 1.5 hr, O,N-dimethylhydroxylamine hydrochloride (10.6 g; 0.108 mol) was added, and the resulting solution was stirred overnight. The mixture was added to a separatory funnel, diluted with dichloromethane (220 mL) and washed successively with 2 M HCl (2×), 1 M NaOH and sat'd aq sodium chloride, dried over MgSO4, filtered and concentrated to give tert-butyl 4-(methoxy(methyl)amino)-4-oxobutylcarbamate (23.8 g, 98%). ESI MS found for C11H22N2O4 m/z [269.4 (M+Na+)].

1. additionThe mixture was added to a separatory funnel
2. washwashed successively with 2 M HCl (2×), 1 M NaOH
3. dry with materialdried over MgSO4
4. filtrationfiltered
5. concentrationconcentrated