反应详情

A solution of 4-(2-hydroxyacetoyl)benzonitrile (0.730 g; 4.53 mmol) and glycine tert-butyl ester (0.896 mg; 6.80 mmol) in DCM/MeOH (1:1; 12 mL) was stirred at ambient temperature for 1 hour. Sodium cyanoborohydride (0.342 g; 6.80 mmol) and acetic acid (0.389 mL; 6.80 mmol) were added to the reaction mixture and the mixture stirred for 18 hours. The reaction mixture was diluted with DCM and water and then poured through a hydrophobic frit. The filtrate was evaporated in vacuo. The residue was purified by flash chromatography eluting with iso-hexane/EtOAc (3:2) to afford the title compound. 1H NMR (CDCl3, 400 MHz) δ 7.65 (d, J=8.4 Hz, 2H), 7.49 (d, J=8.4 Hz, 2H), 3.88-3.85 (m, 1H), 3.76-3.72 (m, 1H), 3.59-3.55 (m, 1H), 3.32 (d, J=17.6 Hz, 1H), 3.15 (d, J=17.6 Hz, 1H), 1.49 (s, 9H).

1. additionpoured through a hydrophobic frit
2. customThe filtrate was evaporated in vacuo
3. customThe residue was purified by flash chromatography
4. washeluting with iso-hexane/EtOAc (3:2)