Pyridine → 4-Hydroxy-5-methoxycarbonyloxy-6-(methoxymethoxy)-3,3a,4,5,6,7-hexahydro-2,1-benzoisooxazole

HRID 1741966노트

반응식

HRID 1741966 반응식
[OH:1][CH:2]1[CH:7]2[CH2:8][O:9][N:10]=[C:6]2[CH2:5][CH:4]([O:11][CH2:12][O:13][CH3:14])[CH:3]1[OH:15].N1C=CC=CC=1.[C:22](Cl)(=[O:25])[O:23][CH3:24]>C(Cl)Cl.C(OCC)C>[OH:1][CH:2]1[CH:7]2[CH2:8][O:9][N:10]=[C:6]2[CH2:5][CH:4]([O:11][CH2:12][O:13][CH3:14])[CH:3]1[O:15][C:22]([O:23][CH3:24])=[O:25]

참가 물질

6

반응물 3

HCID 1049PyridineHCID 6586Methyl chloroformateHCID 677918454,5-Dihydroxy-6-(methoxymethoxy)-3,3a,4,5,6,7-hexahydro-2,1-benzoisooxazole

생성물 1

HCID 677938944-Hydroxy-5-methoxycarbonyloxy-6-(methoxymethoxy)-3,3a,4,5,6,7-hexahydro-2,1-benzoisooxazole수율 50%

시약·촉매·용매 2

HCID 3283Diethyl Ether용매HCID 6344Dichloromethane용매

실험 절차

4,5-Dihydroxy-6-(methoxymethoxy)-3,3a,4,5,6,7-hexahydro-2,1-benzoisooxazole (217 mg) was dissolved in 10 ml of methylene chloride, and 1 ml of pyridine and then 100 mg of methyl chlorocarbonate were added under ice cooling. The mixture was stirred at room temperature for 3 hours. The reaction mixture was diluted with diethyl ether, washed with dilute hydrochloric acid, a sodium hydrogen carbonate aqueous solution and a sodium chloride aqueous solution in sequence. The organic layer was dried over anhydrous sodium sulfate, and concentrated was under reduced pressure. The obtained residue was purified by silica gel column chromatography to give 137 mg of 4-hydroxy-5-methoxycarbonyloxy-6-(methoxymethoxy)-3,3a,4,5,6,7-hexahydro-2,1-benzoisooxazole having the following property (yield 50%).

후처리

  1. washwashed with dilute hydrochloric acid
  2. dry with materialThe organic layer was dried over anhydrous sodium sulfate
  3. concentrationconcentrated
  4. customThe obtained residue was purified by silica gel column chromatography

출처 및 근거

ORD 기록
ord-3fbb531900484276a227dc177a666478
출처 데이터셋
uspto-grants-1994_08
특허 번호
US05334740

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