反应详情

To a suspension of methyl-4-benzyloxy-5,7-dichloroquinoline-2-carboxylate (1.2 g) in ethanol (20 ml) was added a solution of sodium hydroxide (0.53 g) in water (20 ml) and the mixture was stirred at room temperature for 1 h. Hydrochloric acid (11M) was added until pH2 and the resulting precipitate was filtered off, washed with water (20 ml), ethanol (10 ml), diethylether (5 ml) and dried to yield 4-benzyloxy-5,7-dichloroquinoline-2-carboxylic acid (0.95 g). δ (360 MHz, DMSO-d6), 5.49 (2H, s, CH2), 7.40 (3H, m, m,p-ArH), 7.58 (2H, d, o-ArH), 7.71 (1H, s, 3-H), 7.83 (1H, d, 6-H) and 8.81 (1H, d, 8-H).

1. filtrationthe resulting precipitate was filtered off
2. washwashed with water (20 ml), ethanol (10 ml), diethylether (5 ml)
3. customdried