反应详情

温度

35 °C

To a solution of tert-butyl 4-(4-nitroisothiazol-5-yloxy)piperidine-1-carboxylate (1C3) (213 mg, 0.67 mmol) in methanol (4 mL) at room temperature was added water (3 mL), saturated NaHCO3 solution (3 mL) and Na2S2O4 (340 mg, 2 mmol). The mixture was stirred at 35° C. for 3 hours, cooled to room temperature, diluted with ethyl acetate (100 mL), washed with brine, dried over Na2SO4, and concentrated in vacuo at room temperature (25° C.). The residue was purified with flash column (eluent: 10-30% ethyl acetate/petroleum ether) to afford the product tert-butyl 4-(4-aminoisothiazol-5-yloxy)piperidine-1-carboxylate (1D4) (80 mg, 0.27 mmol).

1. temperaturecooled to room temperature
2. washwashed with brine
3. dry with materialdried over Na2SO4
4. concentrationconcentrated in vacuo at room temperature (25° C.)
5. customThe residue was purified with flash column (eluent: 10-30% ethyl acetate/petroleum ether)