反应详情

A mixture of 2-chloro-6-(trifluoromethyl)nicotinic acid (2 g, 8.9 mmol) and sodium methoxide (1.9 g, 36 mmol) in methanol (20 mL) was heated at reflux for 48 hours. The mixture was allowed to cool to room temperature then poured into water (50 mL). This was cooled in an ice-bath and acidified with hydrochloric acid (2 N, aq). The resulting precipitate was filtered and dried to give 2-methoxy-6-(trifluoromethyl)nicotinic acid as a white solid (1.1 g): 1H NMR (400 MHz, CDCl3): δ 8.61 (1H, d, J 7.7), 7.48 (1H, d, J 7.7), 4.25 (3H, s).

1. temperaturewas heated
2. temperatureat reflux for 48 hours
3. temperatureThis was cooled in an ice-bath
4. filtrationThe resulting precipitate was filtered
5. customdried