Water → Benzyl 4-methoxypiperidine-1-carboxylate

HRID 253060

반응식

HRID 253060 반응식
[CH2:1]([O:8][C:9]([N:11]1[CH2:16][CH2:15][CH:14]([OH:17])[CH2:13][CH2:12]1)=[O:10])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.[H-].[Na+].[CH3:20]I.O>CN(C)C=O.C(OCC)(=O)C>[CH2:1]([O:8][C:9]([N:11]1[CH2:16][CH2:15][CH:14]([O:17][CH3:20])[CH2:13][CH2:12]1)=[O:10])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1

참가 물질

7

반응물 4

HCID 962WaterHCID 6328Methyl iodideHCID 24758Sodium hydrideHCID 2794620Benzyl 4-Hydroxy-1-piperidinecarboxylate

생성물 1

HCID 23024301Benzyl 4-methoxypiperidine-1-carboxylate수율 45%

시약·촉매·용매 2

HCID 6228Dimethylformamide용매HCID 8857Ethyl Acetate용매

실험 절차

To a solution of 1-benzyloxycarbonyl-4-hydroxypiperidine (1.3 g) in dimethylformamide (10 mL) was added sodium hydride (360 mL) under ice cooling and the mixture was stirred at room temperature under nitrogen-gas atmosphere for 1 hours. To the reaction mixture was added methyl iodide (374 μL) under ice-cooling and the mixture was stirred at the same temperature for 1 hour and at room temperature for 2 hours. To the reaction mixture was added water and ethyl acetate and the mixture was stirred. The organic layer washed with a brine, dried over magnesium sulfate and filtered. The filtrate was concentrated in vacuo and the resultant crude product was purified by column chromatography on silica gel (solvent: hexane/ethyl acetate=88/12 to 70/30) to obtain 1-benzyloxycarbonyl-4-methoxypiperidine (622 mg, yield: 45%) as a pale yellow oil.

후처리

  1. temperaturecooling
  2. stirringthe mixture was stirred at the same temperature for 1 hour and at room temperature for 2 hours
  3. stirringthe mixture was stirred
  4. washThe organic layer washed with a brine
  5. dry with materialdried over magnesium sulfate
  6. filtrationfiltered
  7. concentrationThe filtrate was concentrated in vacuo
  8. customthe resultant crude product was purified by column chromatography on silica gel (solvent: hexane/ethyl acetate=88/12 to 70/30)

출처 및 근거

ORD 기록
ord-e9dd1c0189ef49e99991622f5a437a99
출처 데이터셋
uspto-grants-2011_01
특허 번호
US07872006B2

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