反应详情

温度

0 °C

To a solution of 6-cyano-quinoline-3-carboxylic acid ethyl ester (1.28 g) in tetrahydrofuran (6 ml) and ethanol (6 ml) was added a 1M aqueous LiOH solution (6.79 ml) at 0° C. The mixture was stirred at 0° C. for 1.5 h, then the mixture was acidified with 1M aqueous HCl. The precipitate was filtered off, washed with water and a small amount of ether and dried to give the crude title compound (1.2 g) as an off-white solid that was used in the next step without further purification. MS (m/e, ISP neg. ion)=197.2 [M−H+].

1. filtrationThe precipitate was filtered off
2. washwashed with water
3. dry with materiala small amount of ether and dried