反应详情

温度

100 °C

(2-Chloro-6-cyano-naphthalen-1-yl)-acetic acid ethyl ester (1.39 g, 5.07 mmol) is dissolved in a mixture of water (17 ml), pyridine (33 ml) and glacial acetic acid (17 ml). Sodium hypophosphite (4.30 g, 40.62 mmol) and Raney nickel (3.2 g) are then added at RT. The reaction mixture is heated to 100° C. for 1 h. TLC analysis indicates complete consumption of starting material. The reaction mixture is cooled to RT and filtered through Celite. After addition of silica gel, the solvents are removed on a rotary evaporator. Purification by FCC (hexane/EtOAc 5:1) yields the title compound. 1H NMR (CDCl3, 400 MHz): δ 1.17 (t, J=8 Hz, 3H), 4.10 (q, J=8 Hz, 2H), 4.24 (s, 2H), 7.52 (d, J=10 Hz, 1H), 7.82 (d, J=10 Hz; 1H), 7.94-7.98 (m, 2H); 8.26 (s, 1H), 10.09 (s, 1H). ES−-MS: 275.2, 277.3 [M−H]−.

1. customconsumption of starting material
2. temperatureThe reaction mixture is cooled to RT
3. filtrationfiltered through Celite
4. additionAfter addition of silica gel
5. customthe solvents are removed on a rotary evaporator
6. customPurification by FCC (hexane/EtOAc 5:1)