反应详情

A mixture of 3-(t-butyloxycarbonylamino)benzoic acid (20 g), triethylamine (12.8 g), chloroacetonitrile (9.4 g) and acetone (150 ml) is refluxed for 4 hours. After acetone is distilled off under reduced pressure, the residue is dissolved in ethyl acetate (200 ml), and the solution is washed with water, and ethyl acetate is distilled off under reduced pressure. The residue is recrystallized from 80% aqueous acetonitrile solution to give the title compound (22 g, 99%) as white short needles.

1. temperatureis refluxed for 4 hours
2. distillationAfter acetone is distilled off under reduced pressure
3. dissolutionthe residue is dissolved in ethyl acetate (200 ml)
4. washthe solution is washed with water, and ethyl acetate
5. distillationis distilled off under reduced pressure
6. customThe residue is recrystallized from 80% aqueous acetonitrile solution