反应详情

To a stirred solution of 3-(4-amino-2-fluorophenyl)oxetan-3-ol (0.93 g, 5.08 mmol, 1.0 eq) in acetone (10 mL) was added pyridine (0.82 mL, 10.16 mmol, 2.0 eq) and phenyl chloroformate (0.7 mL, 5.59 mmol, 1.1 eq) at 0° C. and the mixture was stirred at RT for 1 h. The solvents was evaporated and the crude product was extracted with EtOAC (25 mL), diluted with water (15 mL), washed with brine (10 mL), dried over anhydrous Na2SO4 and evaporated under vacuum. The resulting residue was washed with diethyl ether (25 mL) to get phenyl 3-fluoro-4-(3-hydroxyoxetan-3-yl)phenylcarbamate (0.892 g, 59%) as a off white solid (TLC system: 100% EtOAc, Rf: 0.55).

1. customThe solvents was evaporated
2. extractionthe crude product was extracted with EtOAC (25 mL)
3. additiondiluted with water (15 mL)
4. washwashed with brine (10 mL)
5. dry with materialdried over anhydrous Na2SO4
6. customevaporated under vacuum
7. washThe resulting residue was washed with diethyl ether (25 mL)