反应详情

[3-(4-benzylamino-phenyl)-isoxazol-5-yl]-methanol (178 mg, 0.63 mmol) was dissolved in THF (20 ml, 0.03 M), to which was added CDI (154 mg, 0.95 mmol). After the mixture was stirred at room temperature for about 1 hour, 1 ml of ammonium hydroxide was added and the resulting mixture was stirred for another 3 hours. The completion of the reaction was confirmed by liquid chromatography, and the THF was distilled under reduced pressure to obtain a pale yellow solid compound. The solid compound was extracted three times with water and ethyl acetate, the organic solvent layer was dried under reduced pressure, and then a crude compound was purified by column chromatography on silica gel using ethyl acetate/hexane (1:3) to obtain carbamic acid 3-(4-benzylamino-phenyl)-isoxazol-5-ylmethyl ester as a white solid.

1. stirringthe resulting mixture was stirred for another 3 hours
2. distillationthe THF was distilled under reduced pressure
3. customto obtain a pale yellow solid compound
4. extractionThe solid compound was extracted three times with water and ethyl acetate
5. customthe organic solvent layer was dried under reduced pressure
6. customa crude compound was purified by column chromatography on silica gel