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Lithium hydroxide, monohydrate → 2-[(5-{(1R)-4-Cyclohexyl-1-[2-(hydroxyamino)-2-oxoethyl]butyl}-1,2,4-oxadiazol-3-yl)methoxy]propanoic acid

HRID 2182946
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HRID 2182946 반응식
[CH:1]1([CH2:7][CH2:8][CH2:9][C@@H:10]([C:16]2[O:20][N:19]=[C:18]([CH2:21][O:22][CH:23]([CH3:29])[C:24]([O:26]CC)=[O:25])[N:17]=2)[CH2:11][C:12]([NH:14][OH:15])=[O:13])[CH2:6][CH2:5][CH2:4][CH2:3][CH2:2]1.O.[OH-].[Li+]>O1CCOCC1.O>[CH:1]1([CH2:7][CH2:8][CH2:9][C@@H:10]([C:16]2[O:20][N:19]=[C:18]([CH2:21][O:22][CH:23]([CH3:29])[C:24]([OH:26])=[O:25])[N:17]=2)[CH2:11][C:12]([NH:14][OH:15])=[O:13])[CH2:6][CH2:5][CH2:4][CH2:3][CH2:2]1
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5

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HCID 168937Lithium hydroxide, monohydrateHCID 10273041Ethyl 2-[(5-{(1R)-4-cyclohexyl-1-[2-(hydroxyamino)-2-oxoethyl]butyl}-1,2,4-oxadiazol-3-yl)methoxy]propanoate

생성물 1

HCID 102933262-[(5-{(1R)-4-Cyclohexyl-1-[2-(hydroxyamino)-2-oxoethyl]butyl}-1,2,4-oxadiazol-3-yl)methoxy]propanoic acid수율 92.7%

시약·촉매·용매 2

HCID 962Water용매
HCID 31275
1,4-Dioxane
용매

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온도
0 °C

실험 절차

A solution of ethyl 2-[(5-{(1R)-4-cyclohexyl-1-[2-(hydroxyamino)-2-oxoethyl]butyl}-1,2,4-oxadiazol-3-yl)methoxy]propanoate (Example 51) (184 mg, 0.45 mmol) in 1,4-dioxan (4 ml) and water (2 ml) was cooled to 0° C. and treated with lithium hydroxide monohydrate (2 mg, 0.48 mmol) and stirred at 0° C. for 2 hours. The solvent was partially removed under reduced pressure and diluted with water and washed with diethylether (×2). The aqueous layer was acidified to pH 1 with hydrochloric acid (2M) and washed with ethyl acetate (×2). The combined organic layers were washed with brine, dries over anhydrous sodium sulphate, filtered and the solvent was removed under reduced pressure to afford the title compound as a colourless oil (160 mg).

후처리

  1. customThe solvent was partially removed under reduced pressure
  2. additiondiluted with water
  3. washwashed with diethylether (×2)
  4. washwashed with ethyl acetate (×2)
  5. washThe combined organic layers were washed with brine, dries over anhydrous sodium sulphate
  6. filtrationfiltered
  7. customthe solvent was removed under reduced pressure

출처 및 근거

ORD 기록
ord-192ca745859d431c8b322cffbb6e60dd
출처 데이터셋
uspto-grants-2005_05
DOI
10.6084/m9.figshare.5104873.v1
특허 번호
US06897306B2

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