反应详情

A 50% aqueous solution of hydroxylamine (13.25 mL, 225 mmol) was added at once into a solution of tert-butyl N-(4-cyanobenzyl)-N-methylglycinate (11.70 g, 45 mmol) in EtOH (75 mL). The reaction mixture was stirred at RT overnight. The solvents were removed under reduced pressure to give a white solid. The solid was suspended in water (200 mL) and stirred for 20 minutes, then filtered off, washed with water and dried to give the title compound as a white powder (12.54 g, 95%). 1H NMR (DMSO-d6, 300 MHz) δ 9.58 (s, 1H), 7.62 (d, J=8.3 Hz, 2H), 7.28 (d, J=8.3 Hz, 2H), 5.78 (s, 2H), 3.62 (s, 2H), 3.15 (s, 2H), 2.24 (s, 3H), 1.42 (s, 9H). LC/MS (Method B): 294.0 (M+H)+.

1. customThe solvents were removed under reduced pressure
2. customto give a white solid
3. stirringstirred for 20 minutes
4. filtrationfiltered off
5. washwashed with water
6. customdried