反应详情

6-((trans)-4-tert-butylcyclohexyloxy)-2-naphthaldehyde (310 mg, 1 mmol), 2-aminoacetonitrile (112 mg, 2 mmol, 2.0 eq) and acetic acid (180 mg, 3 mmol, 3.0 eq) in DCE (10 mL) was stirred at rt for 10 min. Then NaBH(OAc)3 (636 mg, 3 mmol, 3.0 eq) was added to the mixture and the mixture was stirred at rt for 15 h. Then saturated NaHCO3 was added to the mixture until pH=8. The mixture was extracted with DCM (20 mL×3). The organic layer was concentrated and the residue was purified by silica gel column chromatography eluting with DCM/CH3OH (20/1) to give product the title compound as a colorless oil (240 mg, yield: 69%). ESI-MS (M+H+): 351.2. 1H NMR (400 MHz, CDCl3) δ: 7.70 (dd, 2H), 7.68 (s, 1H), 7.41 (dd, 1H), 7.13 (d, 2H), 4.30-4.23 (m, 1H), 4.05 (s, 2H), 3.57 (s, 2H), 2.26 (d, 2H), 1.90 (d, 2H), 1.48-1.42 (m, 2H), 1.20-1.09 (m, 3H), 0.90 (s, 9H).

1. extractionThe mixture was extracted with DCM (20 mL×3)
2. concentrationThe organic layer was concentrated
3. customthe residue was purified by silica gel column chromatography
4. washeluting with DCM/CH3OH (20/1)