Trifluoroacetic acid → 4-(3-Fluorophenoxy)piperidine

HRID 906348

반응식

HRID 906348 반응식
[F:1][C:2]1[CH:3]=[C:4]([O:8][CH:9]2[CH2:14][CH2:13][N:12](C(OC(C)(C)C)=O)[CH2:11][CH2:10]2)[CH:5]=[CH:6][CH:7]=1.C(O)(C(F)(F)F)=O>C(Cl)Cl>[F:1][C:2]1[CH:3]=[C:4]([O:8][CH:9]2[CH2:14][CH2:13][NH:12][CH2:11][CH2:10]2)[CH:5]=[CH:6][CH:7]=1

참가 물질

4

반응물 2

HCID 6422Trifluoroacetic acidHCID 57699520Tert-butyl 4-(3-fluorophenoxy)piperidine-1-carboxylate

생성물 1

HCID 185240024-(3-Fluorophenoxy)piperidine수율 111.8%

시약·촉매·용매 1

HCID 6344Dichloromethane용매

실험 절차

A solution of 1,1-dimethylethyl 4-[(3-fluorophenyl)oxy]-1-piperidinecarboxylate (D11) (16.4 g, 55 mmol) in DCM (200 ml) at 0° C. was treated with TFA (17 ml). The reaction was warmed to room temperature and stirred overnight. The solvent was then removed in vacuo and the residue partitioned between DCM and 2M NaOH solution. The aqueous was further extracted with DCM (×2) and the combined organics concentrated in vacuo. The residue was re-dissolved in DCM and extracted with 2M HCl (×2) which was then basified with 2M NaOH and re-extracted with DCM (×3). The combined organics were concentrated in vacuo to give the title compound (12 g). δH (CDCl3, 250 MHz) 1.66 (2H, m), 2.01 (2H, m), 2.73 (2H, m), 3.14 (2H, m), 4.34 (1H, m), 6.68 (3H, m), 7.19 (1H, m), MS (ES): MH+ 196. This whole was diluted with MeOH and treated with 1M HCl in Et2O to give the hydrochloride salt of the title compound (8.0 g).

후처리

  1. customThe solvent was then removed in vacuo
  2. customthe residue partitioned between DCM and 2M NaOH solution
  3. extractionThe aqueous was further extracted with DCM (×2)
  4. concentrationthe combined organics concentrated in vacuo
  5. dissolutionThe residue was re-dissolved in DCM
  6. extractionextracted with 2M HCl (×2) which
  7. extractionre-extracted with DCM (×3)
  8. concentrationThe combined organics were concentrated in vacuo

출처 및 근거

ORD 기록
ord-a2881ee2bc494afc87a53d881073b817
출처 데이터셋
uspto-grants-2011_09
특허 번호
US08012981B2

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