反应详情

1-[(Benzyloxy)carbonyl]cyclopropanecarboxylic acid (1.04 g) was dissolved in tetrahydrofuran (15 ml) under a nitrogen atmosphere. N-Methylmorpholine (0.520 ml) was added at 0° C., and the mixture was stirred for 15 minutes. Thionyl chloride (0.345 ml) was added to the mixture at 0° C., and the mixture was stirred at the same temperature for 30 minutes; 4-(4-Amino-2,5-difluorophenoxy)pyridine-2-carboxamide (500 mg) and N-methylmorpholine (0.520 ml) were added, and the mixture was stirred at room temperature for 2 hours and 50 minutes. The reaction mixture was partitioned after the addition of a 1N aqueous solution of sodium hydroxide (15 ml) and ethyl acetate (20 ml). The organic layer was washed with a 1N aqueous solution of sodium hydroxide (15 ml), water (15 ml) and brine (15 ml), and dried over anhydrous magnesium sulfate. The desiccant was removed by filtration, and the filtrate was concentrated under reduced pressure. The resultant residue was purified by silica gel column chromatography (Fuji Silysia NH, eluent; heptane:ethyl acetate=1:1, to 1:2). The fractions containing the target compound was concentrated under reduced pressure to give the title compound (822.7 mg, 93%) as white powder.

1. stirringthe mixture was stirred at the same temperature for 30 minutes
2. stirringthe mixture was stirred at room temperature for 2 hours and 50 minutes
3. customThe reaction mixture was partitioned
4. additionafter the addition of a 1N aqueous solution of sodium hydroxide (15 ml) and ethyl acetate (20 ml)
5. washThe organic layer was washed with a 1N aqueous solution of sodium hydroxide (15 ml), water (15 ml) and brine (15 ml)
6. dry with materialdried over anhydrous magnesium sulfate
7. customThe desiccant was removed by filtration
8. concentrationthe filtrate was concentrated under reduced pressure
9. customThe resultant residue was purified by silica gel column chromatography (Fuji Silysia NH, eluent; heptane:ethyl acetate=1:1, to 1:2)
10. additionThe fractions containing the target compound
11. concentrationwas concentrated under reduced pressure