Water → 3-(2,2-Difluoroethoxy)-1-(trifluoroacetyl)piperidin-4-one

HRID 43689노트

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HRID 43689 반응식
O.[C:2](O)([C:4]([F:7])([F:6])[F:5])=[O:3].[F:9][CH:10]([F:30])[CH2:11][O:12][CH:13]1[C:18](OC)([O:19]C)[CH2:17][CH2:16][N:15](C(OC(C)(C)C)=O)[CH2:14]1.C(=O)(O)[O-].[Na+]>C1COCC1>[F:30][CH:10]([F:9])[CH2:11][O:12][CH:13]1[C:18](=[O:19])[CH2:17][CH2:16][N:15]([C:2](=[O:3])[C:4]([F:7])([F:6])[F:5])[CH2:14]1

참가 물질

6

반응물 4

HCID 962WaterHCID 6422Trifluoroacetic acidHCID 516892Sodium BicarbonateHCID 86648630tert-Butyl 3-(2,2-difluoroethoxy)-4,4-dimethoxypiperidine-1-carboxylate

생성물 1

HCID 866486323-(2,2-Difluoroethoxy)-1-(trifluoroacetyl)piperidin-4-one

시약·촉매·용매 1

HCID 8028Tetrahydrofuran용매

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온도
70 °C

실험 절차

Water (5 mL) and TFA (2 mL) were added to a solution of tert-butyl 3-(2,2-difluoroethoxy)-4,4-dimethoxypiperidine-1-carboxylate obtained in Example (121b) (1.5 g, 4.67 mmol) in THF (30 mL), and the mixture was stirred at 70° C. for one hour. Sodium bicarbonate was added to a pH of about 8, followed by extraction with ethyl acetate. The organic layer was washed with brine, dried over anhydrous magnesium sulfate, and concentrated under reduced pressure. The resulting residue was purified by silica gel column chromatography (elution solvent: hexane/ethyl acetate=10/1, 5/1, 2/1, 1/1) to obtain 1.1 g of the title compound as a light brown oily substance (86%).

후처리

  1. extractionfollowed by extraction with ethyl acetate
  2. washThe organic layer was washed with brine
  3. dry with materialdried over anhydrous magnesium sulfate
  4. concentrationconcentrated under reduced pressure
  5. customThe resulting residue was purified by silica gel column chromatography (elution solvent: hexane/ethyl acetate=10/1, 5/1, 2/1, 1/1)

출처 및 근거

ORD 기록
ord-133b55fc78a64696a81b7df60a35aa62
출처 데이터셋
uspto-grants-2013_09
특허 번호
US08536197B2

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