反应详情

A solution of 2-(4-tert-butyl-cyclohexyloxy)-quinoline-6-carbaldehyde (30.6 mg, 0.0983 mmol) and Beta-alanine (8.75 mg, 0.0983 mmol) in ethanol (0.7 mL, 10 mmol) was heated to reflux for 2 h. The yellow solution was cooled to rt and sodium cyanoborohydride (7.41 mg, 0.118 mmol) was added and was heated to reflux for 1 h. After cooled down to rt, citric acid was added and concentrated down. The solid was suspended in water and filtrate, and the collected solid was washed thoroughly with water. HPLC purification of the solid give the product (7.5 mg, 15%). LCMS Rt=1.60 min m/z=385.49 [M+1]. 1H NMR (400 MHz, MeOD) δ=8.14 (d, J=8.8 Hz, 1H), 7.92 (s, 1H), 7.88 (d, J=8.7 Hz, 1H), 7.72 (d, J=10.7 Hz, 1H), 6.96 (d, J=8.8 Hz, 1H), 5.29-5.09 (m, 1H), 4.40 (s, 2H), 3.36 (t, J=5.8 Hz, 2H), 2.79 (t, J=6.7 Hz, 2H), 2.30 (d, J=10.9 Hz, 2H), 1.94 (d, J=12.9 Hz, 2H), 1.55-1.06 (m, 5H), 0.94 (s, 9H).

1. temperatureto reflux for 2 h
2. temperaturewas heated
3. temperatureto reflux for 1 h
4. temperatureAfter cooled down to rt
5. concentrationconcentrated down
6. washfiltrate, and the collected solid was washed thoroughly with water
7. customHPLC purification of the solid