反应详情

温度

90 °C

7-Fluoro-2-(1-hydroxy-1-methylethyl)-5-methyl-6-phenyl-1,3-benzoxazole-4-carbonitrile (I-112) (35 mg, 0.11 mmol) was dissolved in anhydrous dimethyl sulfoxide (2 ml), and at room temperature, triethylamine (24 μl, 0.17 mmol) and (3S)-3-(dimethylamino)pyrrolidine (22 μl, 0.17 mmol) were added. This mixture liquid was stirred at 90° C. for 12 hours, then cooled to room temperature. This was fractionated with ethyl acetate and saturated brine. The aqueous layer was separated, and this was extracted twice with ethyl acetate. The organic layers were combined, this was washed with saturated brine, dried over anhydrous sodium sulfate. The insoluble matter was separated by filtration, the solvent was evaporated away, and the resulting residue was purified by preparative TLC (eluent, chloroform:methanol=9:1) to obtain the entitled compound (41.5 mg, 91%) as a white solid. This was further recrystallized from hexane/diethyl ether to obtain a cream powder (27.5 mg).

1. temperaturecooled to room temperature
2. customThe aqueous layer was separated
3. extractionthis was extracted twice with ethyl acetate
4. washthis was washed with saturated brine
5. dry with materialdried over anhydrous sodium sulfate
6. customThe insoluble matter was separated by filtration
7. customthe solvent was evaporated away
8. customthe resulting residue was purified by preparative TLC (eluent, chloroform:methanol=9:1)