Ethyl Acetate → tert-Butyl cis(+/-)-4-{[(benzyloxy)carbonyl]amino}-3-methoxypiperidine-1-carboxylate

HRID 43477

반응식

HRID 43477 반응식
[NH2:1][C@H:2]1[CH2:7][CH2:6][N:5]([C:8]([O:10][C:11]([CH3:14])([CH3:13])[CH3:12])=[O:9])[CH2:4][C@H:3]1[O:15][CH3:16].C(=O)([O-])[O-].[Na+].[Na+].Cl[C:24]([O:26][CH2:27][C:28]1[CH:33]=[CH:32][CH:31]=[CH:30][CH:29]=1)=[O:25].C(OCC)(=O)C>C1COCC1>[CH2:27]([O:26][C:24]([NH:1][C@H:2]1[CH2:7][CH2:6][N:5]([C:8]([O:10][C:11]([CH3:12])([CH3:13])[CH3:14])=[O:9])[CH2:4][C@H:3]1[O:15][CH3:16])=[O:25])[C:28]1[CH:33]=[CH:32][CH:31]=[CH:30][CH:29]=1

참가 물질

6

반응물 4

HCID 8857Ethyl AcetateHCID 10340Sodium CarbonateHCID 10387Benzyl chloroformateHCID 57362389(3R,4S)-4-Amino-1-boc-3-methoxypiperidine

생성물 1

HCID 86648489tert-Butyl cis(+/-)-4-{[(benzyloxy)carbonyl]amino}-3-methoxypiperidine-1-carboxylate수율 90.6%

시약·촉매·용매 1

HCID 8028Tetrahydrofuran용매

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온도
0 °C

실험 절차

tert-Butyl cis(±)-4-amino-3-methoxypiperidine-1-carboxylate obtained by the method described in Example (1e) (3.0 g, 13.0 mmol) was dissolved in THF (60 mL), followed by cooling to 0° C. Thereafter, aqueous sodium carbonate solution (30 mL) and benzyl chloroformate (2.8 mL, 19.6 mmol) were added, and the mixture was stirred for one hour. Ethyl acetate was added to the reaction solution, and the organic layer was washed with brine and dried over anhydrous sodium sulfate. Following concentration under reduced pressure, the residue was purified by silica gel column chromatography (elution solvent: hexane/ethyl acetate=90/10, 50/50) to obtain 4.29 g of the title compound as a pale yellow solid (90%).

후처리

  1. washthe organic layer was washed with brine
  2. dry with materialdried over anhydrous sodium sulfate
  3. concentrationconcentration under reduced pressure
  4. customthe residue was purified by silica gel column chromatography (elution solvent: hexane/ethyl acetate=90/10, 50/50)

출처 및 근거

ORD 기록
ord-ed8811ea7d87491ebbdb60c85c230308
출처 데이터셋
uspto-grants-2013_09
특허 번호
US08536197B2

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