反应详情

To a solution of (3-bromo-quinolin-6-yloxy)-methylsulfanyl-acetic acid methyl ester (20 g) from Step 1, Stage 1 above in ethanol (150 ml) at R.T. a 2 M solution of sodium hydroxide in water (35.06 ml) was added. The reaction mixture was stirred at R.T. for 2 hours. The reaction mixture was poured into ice-could water (200 ml) and acidified with a 2 M solution of hydrochloric acid in water (35.06 ml). The precipitate was filtered off and washed with water to give (3-Bromo-quinolin-6-yloxy)-methylsulfanyl-acetic acid as yellowish solid (18.79 g). 1H NMR (CDCl3) δ ppm: 13.50 (1H, s br); 8.83 (1H, d); 8.59 (1H, d); 7.99 (1H, d); 7.57 (1H, dd); 7.50 (1H, d); 6.09 (1H, s); 2.17 (3H, s).

1. filtrationThe precipitate was filtered off
2. washwashed with water