反应详情

4-Amino-6-(2-fluoro-4-nitrophenoxy)pyrimidine (89 mg) was dissolved in tetrahydrofuran (3 ml) under a nitrogen atmosphere, and then triethylamine (0.099 ml) and phenyl chloroformate (0.089 ml) were added dropwise thereto while cooling in an ice bath, followed by stirring at room temperature for 45 min. To the reaction mixture was added morpholine (0.249 ml), followed by stirring at room temperature overnight. The reaction mixture was partitioned between ethyl acetate and a saturated aqueous solution of ammonium chloride. The organic layer was washed with a saturated aqueous solution of ammonium chloride, water and brine in this order, and dried over anhydrous sodium sulfate. The solvent was evaporated under a reduced pressure to give a residue, which was then purified by silica gel column chromatography (Fuji Silysia NH, eluent; hexane:ethyl acetate=1:1). Fractions containing the target compound was concentrated under a reduced pressure, and dried in vacuum to provide the titled compound (80.2 mg, 62.0%) as a colorless solid.

1. temperaturewhile cooling in an ice bath
2. stirringby stirring at room temperature overnight
3. customThe reaction mixture was partitioned between ethyl acetate
4. washThe organic layer was washed with a saturated aqueous solution of ammonium chloride, water and brine in this order
5. dry with materialdried over anhydrous sodium sulfate
6. customThe solvent was evaporated under a reduced pressure
7. customto give a residue, which
8. customwas then purified by silica gel column chromatography (Fuji Silysia NH, eluent; hexane:ethyl acetate=1:1)
9. additionFractions containing the target compound
10. concentrationwas concentrated under a reduced pressure
11. customdried in vacuum