反应详情

With cooling with ice, tert-butyl 3-aminopropionate hydrochloride (230 mg, 1.26 mmol) and diisopropylethylamine (430 μl, 2.53 mmol) were added to a dichloromethane (10 ml) solution of 2-chloro-7-fluoro-5-methyl-6-phenyl-1,3-benzoxazole-4-cabonitrile (I-130) (302 mg, 1.05 mmol), followed by stirring at room temperature for 1 hour. The reaction liquid was cooled to room temperature, then ethyl acetate was added, and followed by washing with saturated brine. After drying over anhydrous sodium sulfate, the insoluble matter was separated by filtration, and the residue obtained by concentration was purified by silica gel column chromatography (eluent, n-hexane:ethyl acetate=4:1→1:1, v/v) to obtain the entitled compound (402 mg, 97%) as a white solid.

1. customThe reaction liquid
2. temperaturewas cooled to room temperature
3. washby washing with saturated brine
4. dry with materialAfter drying over anhydrous sodium sulfate
5. customthe insoluble matter was separated by filtration
6. customthe residue obtained by concentration
7. customwas purified by silica gel column chromatography (eluent, n-hexane