反应详情

温度

23 °C

A mixture of 6-(trans-4-tert-butylcyclohexyloxy)-2-naphthaldehyde (155 mg, 0.5 mmol) and ethyl 2-(methylamino)acetate (117 mg, 1.0 mmol, 2.0 equiv) in anhydrous ethanol (20 mL) was refluxed for 2 hr and evaporated in vacuum to dryness. Anhydrous EtOH was added and refluxed for 1 hr, and then the mixture was cooled to 23° C. NaBH3CN (60 mg, 1.0 mmol, 2.0 equiv) was added. The resulted mixture was refluxed for 1 h. The reaction mixture was concentrated in vacuum and the residue was purified by chromatography with silica gel (dichloromethane:methanol 20:1) to give product ethyl 2-(((6-(trans-4-tert-butylcyclohexyloxy)naphthalen-2-yl)methyl)(methyl)amino)acetate as a white solid (82 mg, yield: 40%). ESI-MS: 411.3 (M+H)+. HPLC: 98.93%. 1H NMR (400 MHz, CDCl3) δ 7.71-7.67 (m, 3H), 7.00 (d, 1H), 7.14-7.13 (m, 2H), 4.30-4.28 (m, 1H), 4.18 (q, 2H), 3.82 (s, 3H), 3.30 (s, 2H), 2.45 (s, 3H), 2.29-2.27 (m, 2H), 1.91-1.88 (m, 2H), 1.46-1.42 (M, 2H), 1.29-1.22 (m, 3H), 0.90 (s, 9H).

1. temperaturewas refluxed for 2 hr
2. customevaporated in vacuum to dryness
3. additionAnhydrous EtOH was added
4. temperaturerefluxed for 1 hr
5. temperatureThe resulted mixture was refluxed for 1 h
6. concentrationThe reaction mixture was concentrated in vacuum
7. customthe residue was purified by chromatography with silica gel (dichloromethane:methanol 20:1)