反应详情

A solution of [2-tert-butoxycarbonylamino-2-(4-fluoro-phenyl)-ethylsulfanyl]-acetic acid methyl ester (3.23 g, 9.4 mmol) in trifluoroacetic acid (10 mL) was stirred at 50° C. for 10 hours. The solution was then concentrated under reduced pressure, and the residue was partitioned between saturated aqueous sodium bicarbonate and dichloromethane. The organic layer was separated, dried (Na2SO4), filtered and concentrated under reduced pressure to give 2.0 g of 5-(4-fluoro-phenyl)-thiomorpholin-3-one, MP=111-112° C.

1. concentrationThe solution was then concentrated under reduced pressure
2. customthe residue was partitioned between saturated aqueous sodium bicarbonate and dichloromethane
3. customThe organic layer was separated
4. dry with materialdried (Na2SO4)
5. filtrationfiltered
6. concentrationconcentrated under reduced pressure