反应详情

温度

0 °C

tert-Butyl 3-cyano-3-(hydroxymethyl)azetidine-1-carboxylate (5.0 g) was dissolved in DCM (100 mL). At 0° C., DAST (3.74 mL) was added thereto, followed by stirring at 0° C. for 3 hours. Three hours later, to the reaction liquid was added an aqueous NaHCO3 solution (100 mL), followed by extraction with DCM (50 mL) three times. The organic layer was washed with brine, dried over MgSO4, and then concentrated. The residue was purified by silica gel column chromatography (automatic purification device, hexane:EtOAc=100:0 to 50:50) to obtain tert-butyl 3-cyano-3-(fluoromethyl)azetidine-1-carboxylate (1.24 g) as a brown solid.

1. customThree hours later, to the reaction liquid
2. extractionfollowed by extraction with DCM (50 mL) three times
3. washThe organic layer was washed with brine
4. dry with materialdried over MgSO4
5. concentrationconcentrated
6. customThe residue was purified by silica gel column chromatography (automatic purification device, hexane:EtOAc=100:0 to 50:50)