反应详情

1-[4-(2-Carbamoylpyridin-4-yloxy)-2-fluorophenylcarbamoyl]cyclopropanecarboxylic acid benzyl ester (17.9 g) was dissolved in N-methyl-2-pyrrolidone (125 ml) at room temperature, and water (7.2 ml) was added. Iodobenzene diacetate (14.1 g) was added with stirring at room temperature, followed by stirring for 4 hours and 7 minutes. Ethyl acetate (268 ml) and a 1N aqueous solution of sodium hydroxide (179 ml) were added to the reaction mixture, and the layers were separated. The organic layer was washed with a 5% aqueous solution of sodium chloride (179 ml) three times and water (179 ml) once, dried over magnesium sulfate, filtered, and concentrated. Toluene (72 ml) was added to the resultant crystals, and the mixture was heated and stirred at 90° C. After confirming the crystals were dissolved, the mixture was allowed to cool down to room temperature. The precipitated crystals were collected by filtration, washed with toluene (18 ml), and dried under reduced pressure at 50° C. for 4 hours to give the title compound (11.9 g) as pale orange crystals.

1. stirringby stirring for 4 hours and 7 minutes
2. customthe layers were separated
3. washThe organic layer was washed with a 5% aqueous solution of sodium chloride (179 ml) three times and water (179 ml) once
4. dry with materialdried over magnesium sulfate
5. filtrationfiltered
6. concentrationconcentrated
7. additionToluene (72 ml) was added to the resultant crystals
8. temperaturethe mixture was heated
9. stirringstirred at 90° C
10. dissolutionwere dissolved
11. temperatureto cool down to room temperature
12. filtrationThe precipitated crystals were collected by filtration
13. washwashed with toluene (18 ml)
14. customdried under reduced pressure at 50° C. for 4 hours