m-Chloroperbenzoic acid → 5-Benzyloxy-2-methylpyridine 1-oxide

HRID 78116노트

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HRID 78116 반응식
[CH2:1]([O:8][C:9]1[CH:10]=[CH:11][C:12]([CH3:15])=[N:13][CH:14]=1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.ClC1C=CC=C(C(OO)=[O:24])C=1.C(=O)(O)[O-].[Na+]>C(Cl)Cl>[CH2:1]([O:8][C:9]1[CH:10]=[CH:11][C:12]([CH3:15])=[N+:13]([O-:24])[CH:14]=1)[C:2]1[CH:3]=[CH:4][CH:5]=[CH:6][CH:7]=1

참가 물질

5

반응물 3

HCID 70297m-Chloroperbenzoic acidHCID 516892Sodium BicarbonateHCID 123972515-(Benzyloxy)-2-methylpyridine

생성물 1

HCID 123972525-Benzyloxy-2-methylpyridine 1-oxide수율 119%

시약·촉매·용매 1

HCID 6344Dichloromethane용매

실험 절차

To a methylene chloride (100 mL) solution of 5-benzyloxy-2-methyl-pyridine (5.99 g, 30.1 mmol) described in Manufacturing Example 127-1-1 was added m-chloroperbenzoic acid (8.79 g, 33.1 mmol, purity: 65%) at 0° C., which was stirred for 2 hours at room temperature. Saturated aqueous sodium bicarbonate was added to the reaction mixture at 0° C., which was extracted with methylene chloride. The organic layer was separated, washed with saturated aqueous sodium bicarbonate and saturated aqueous sodium chloride, dried over anhydrous magnesium sulfate, and filtered. The filtrate was concentrated under a reduced pressure to obtain 5-benzyloxy-2-methyl-pyridine-1-oxide (7.71 g). Acetic anhydride (77 mL) was added to 5-benzyloxy-2-methyl-pyridine-1-oxide (7.71 g) thus obtained, which was stirred for 80 minutes at 120° C. This mixture was cooled to room temperature and then concentrated under a reduced pressure. To an ethanol (50 mL) solution of this residue was added a 5 N sodium hydroxide aqueous solution (7 mL), which was stirred for 50 minutes at room temperature. The reaction mixture was concentrated under a reduced pressure. The residue was partitioned into saturated aqueous sodium chloride and ethyl acetate. The organic layer was separated, washed with saturated aqueous sodium chloride, dried over anhydrous magnesium sulfate, and filtered. The filtrate was concentrated under a reduced pressure, and the residue was purified by NH silica gel column chromatography (heptane: ethyl acetate=1:1) to obtain the title compound (4.17 g, 54%).

후처리

  1. extractionwhich was extracted with methylene chloride
  2. customThe organic layer was separated
  3. washwashed with saturated aqueous sodium bicarbonate and saturated aqueous sodium chloride
  4. dry with materialdried over anhydrous magnesium sulfate
  5. filtrationfiltered
  6. concentrationThe filtrate was concentrated under a reduced pressure

출처 및 근거

ORD 기록
ord-2c98ffec406d417cb764c90f846cd8c4
출처 데이터셋
uspto-grants-2014_09
특허 번호
US08841327B2

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