Water → HCID 57758744, compound

To a solution of ethyl(3S,4R)-4-fluoromethyl-3-methyl-2-oxo-1-[(1R)-1-phenylethyl]pyrrolidine-3-carboxylate (20.0 g, 65.1 mmol) in ethanol (400 mL), 10 mol/l aqueous solution of sodium hydroxide (65.1 mL, 651 mmol) was added dropwise, and the mixture was stirred for 30 minutes. Water (400 mL) was added to the reaction mixture in an ice bath, and the aqueous solution was washed with diethylether (500 mL). Concentrated hydrochloric acid was added to the aqueous layer in an ice bath to pH 2 to 3, and the mixture was extracted with chloroform (500 mL×3). The organic layer was dried with anhydrous sodium sulfate, and after filtration, the filtrate was concentrated under reduced pressure. The concentrate was azeotropically distilled by adding toluene (20 mL), and dried under reduced pressure to obtain 19.16 g (quantitative) of the title compound as a white solid.

1. washthe aqueous solution was washed with diethylether (500 mL)
2. additionConcentrated hydrochloric acid was added to the aqueous layer in an ice bath to pH 2 to 3
3. extractionthe mixture was extracted with chloroform (500 mL×3)
4. dry with materialThe organic layer was dried with anhydrous sodium sulfate
5. filtrationafter filtration
6. concentrationthe filtrate was concentrated under reduced pressure
7. distillationThe concentrate was azeotropically distilled
8. additionby adding toluene (20 mL)
9. customdried under reduced pressure

ORD record

ord-489e259638c94f079f990595f97042d5

Source dataset

uspto-grants-2009_07

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US07563805B2