Sodium Hydroxide → (1-Isopropylpiperidin-4-yl)methanol

HRID 131276노트

반응식

HRID 131276 반응식
[H-].[Al+3].[Li+].[H-].[H-].[H-].[CH:7]([N:10]1[CH2:15][CH2:14][CH:13]([C:16](OCC)=[O:17])[CH2:12][CH2:11]1)([CH3:9])[CH3:8].[OH-].[Na+].S([O-])([O-])(=O)=O.[Mg+2]>O1CCCC1.O>[CH:7]([N:10]1[CH2:15][CH2:14][CH:13]([CH2:16][OH:17])[CH2:12][CH2:11]1)([CH3:9])[CH3:8]

참가 물질

7

반응물 4

HCID 14798Sodium HydroxideHCID 24083Sulfuric acid magnesium salt (1:1)HCID 19900430Ethyl 1-isopropylpiperidine-4-carboxylateHCID 21226445Aluminium lithium hydride

생성물 1

HCID 11147855(1-Isopropylpiperidin-4-yl)methanol수율 99%

시약·촉매·용매 2

HCID 962Water용매2회HCID 8028Tetrahydrofuran용매

실험 절차

Under argon gas atmosphere, lithium aluminum hydride (3.29 g) is suspended in tetrahydrofuran (160 mL) and thereto is added ethyl 1-isopropylpiperidin-4-carboxylate (compound obtained in Reference Example 94(1), 5.00 g) under ice-cooling. The mixture is stirred at room temperature for 14 hours. To the reaction mixture is added successively water (3.3 mL), 2N sodium hydroxide solution (6.6 mL) and water (6.6 mL) under ice-cooling. The mixture is stirred at room temperature for 1 hour. After addition of magnesium sulfate, the reaction mixture is stirred for 10 minutes and filtered. The filtrate is concentrated in vacuo and the residue is purified by flash column chromatography on NH-silica gel (Solvent; n-hexane:ethyl acetate=1:1) to give (1-isopropylpiperidin-4-yl)methanol (3.75 g, yield; 99%) as a colorless oil. MS (APCI) m/z: 158 [M+H]+

후처리

  1. temperaturecooling
  2. temperaturecooling
  3. stirringThe mixture is stirred at room temperature for 1 hour
  4. stirringthe reaction mixture is stirred for 10 minutes
  5. filtrationfiltered
  6. concentrationThe filtrate is concentrated in vacuo
  7. customthe residue is purified by flash column chromatography on NH-silica gel (Solvent; n-hexane:ethyl acetate=1:1)

출처 및 근거

ORD 기록
ord-77b9a00a81bf47ae8de9da058da97263
출처 데이터셋
uspto-grants-2008_06
특허 번호
US07384952B2

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