反应详情

A solution of 5.8 mmol of 2-(4-((6-chloro-2-quinoxalinyl)oxy)phenoxy)propanoyl chloride (previously prepared from 2.0 g, 5.8 mmol, of the corresponding acid) in 15 ml of acetonitrile was added to a mixture of 1.32 g (5.8 mmol) of 4-(1,1,2-trifluoroethoxy)benzeneamine hydrochloride (contaminated with approximately 20 percent of 4-(1,2-difluoroethenyloxy)benzeneamine), 1.47 g (14.5 mmol) of triethylamine and 15 ml of acetonitrile. The mixture was stirred at reflux for 2.5 hours, poured over ice and made basic with dilute aqueous sodium hydroxide. The resulting precipitate was filtered and dried (2.9 g, 97 percent of theoretical) and then recrystallized from methylcyclohexane. This gave the desired product (contaminated with approximately 20 percent of 2-(4-((6-chloro-2-quinoxalinyl)oxy)phenoxy)-N-(4-(1,2-difluoroethenyloxy)phenyl)propanamide) as a solid, m.p. 137°-140° C. (Compound 40)

1. temperatureat reflux for 2.5 hours
2. additionpoured over ice
3. filtrationThe resulting precipitate was filtered
4. customdried (2.9 g, 97 percent of theoretical)
5. customrecrystallized from methylcyclohexane