Diisobutylaluminumhydride → 1-(2-{[Tert-butyl(dimethyl)silyl]oxy}ethyl)-1h-pyrazole-3,5dimethanol

HRID 2216578노트

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HRID 2216578 반응식
[Si:1]([O:8][CH2:9][CH2:10][N:11]1[C:15]([C:16](OCC)=[O:17])=[CH:14][C:13]([C:21](OCC)=[O:22])=[N:12]1)([C:4]([CH3:7])([CH3:6])[CH3:5])([CH3:3])[CH3:2].[H-].C([Al+]CC(C)C)C(C)C>C(Cl)Cl>[Si:1]([O:8][CH2:9][CH2:10][N:11]1[C:15]([CH2:16][OH:17])=[CH:14][C:13]([CH2:21][OH:22])=[N:12]1)([C:4]([CH3:7])([CH3:5])[CH3:6])([CH3:3])[CH3:2]

참가 물질

4

반응물 2

HCID 21225700DiisobutylaluminumhydrideHCID 68444496Diethyl 1-(2-{[tert-butyl(dimethyl)silyl]oxy}ethyl)-1H-pyrazole-3,5-dicarboxylate

생성물 1

HCID 219414671-(2-{[Tert-butyl(dimethyl)silyl]oxy}ethyl)-1h-pyrazole-3,5dimethanol수율 76.8%

시약·촉매·용매 1

HCID 6344Dichloromethane용매2회

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온도
0 °C

실험 절차

To a solution of diethyl 1-(2-{[tert-butyl(dimethyl)silyl]oxy}ethyl)-1H-pyrazole-3,5-dicarboxylate (0.74 g, 2 mmol) in methylene chloride (8 ml), under nitrogen, was added 12 ml of a 1.0 M solution of diisobutylaluminum hydride in methylene chloride at 0° C. After stirring at 0° C. for 0.5 hr, the mixture waas warmed to room temperature for 0.5 hr. It was then quenched with 15 ml of saturated ammonium chloride solution and extracted with ethyl acetate. The organic extract was washed with brine, dried over anhydrous sodium sulfate, and evaporated to give 0.44 g of a white solid; mp 82–83° C.; MS m/e 287 (MH+).

후처리

  1. temperaturethe mixture waas warmed to room temperature for 0.5 hr
  2. customIt was then quenched with 15 ml of saturated ammonium chloride solution
  3. extractionextracted with ethyl acetate
  4. extractionThe organic extract
  5. washwas washed with brine
  6. dry with materialdried over anhydrous sodium sulfate
  7. customevaporated

출처 및 근거

ORD 기록
ord-1eb15f948700474cbbee566c684bd2af
출처 데이터셋
uspto-grants-2006_09
특허 번호
US07112582B2

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