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Ethyl bromoacetate → (3S-cis)-Hexahydro-3-[[(1,1-dimethylethoxy)-carbonyl]amino]-7-methyl-2-oxo-1H-azepine-1-acetic acid, ethyl ester

HRID 741861
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HRID 741861 반응식
[CH3:1][C:2]([CH3:17])([O:4][C:5]([NH:7][C@H:8]1[CH2:14][CH2:13][CH2:12][C@@H:11]([CH3:15])[NH:10][C:9]1=[O:16])=[O:6])[CH3:3].C[Si]([N-][Si](C)(C)C)(C)C.[Li+].Br[CH2:29][C:30]([O:32][CH2:33][CH3:34])=[O:31]>O1CCCC1>[CH3:3][C:2]([CH3:1])([O:4][C:5]([NH:7][C@H:8]1[CH2:14][CH2:13][CH2:12][C@@H:11]([CH3:15])[N:10]([CH2:29][C:30]([O:32][CH2:33][CH3:34])=[O:31])[C:9]1=[O:16])=[O:6])[CH3:17]
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참가 물질

5

반응물 3

HCID 7748Ethyl bromoacetateHCID 2733832Lithium hexamethyldisilazaneHCID 14927375(3S-cis)-hexahydro-3-[[(1,1-dimethylethoxy)carbonyl]amino]-7-methyl-2H-azepin-2-one

생성물 1

HCID 14927378(3S-cis)-Hexahydro-3-[[(1,1-dimethylethoxy)-carbonyl]amino]-7-methyl-2-oxo-1H-azepine-1-acetic acid, ethyl ester

시약·촉매·용매 1

HCID 8028Tetrahydrofuran
용매
2회

실험 절차

A solution of (3S-cis)-hexahydro-3-[[(1,1-dimethylethoxy)carbonyl]amino]-7-methyl-2H-azepin-2-one [prepared as described in Example 64 (f), 500 mg., 2.06 mmol.] in tetrahydrofuran (13 ml.) at room temperature under argon was treated dropwise with 1.0M lithium bis(trimethylsilyl)amide in tetrahydrofuran (2.7 ml., 2.7 mmol.) immediately followed by the dropwise addition of ethyl bromoacetate (0.47 ml., 4.21 mmol.). The resulting mixture was stirred for 30 minutes, quenched with aqueous ammonium chloride, diluted with water and extracted twice with ethyl acetate. The combined organic layers were washed with brine, dried (sodium sulfate), filtered and concentrated to a yellow oil. Following flash chromatography (E Merck silica gel) eluting with 2:1 hexane/ethyl acetate, 750 mg. of title product was obtained as a light yellow oil; TLC (1:1 ethyl acetate:hexane) Rf =0.52.

후처리

  1. customat room temperature
  2. customquenched with aqueous ammonium chloride
  3. additiondiluted with water
  4. extractionextracted twice with ethyl acetate
  5. washThe combined organic layers were washed with brine
  6. dry with materialdried (sodium sulfate)
  7. filtrationfiltered
  8. concentrationconcentrated to a yellow oil
  9. washeluting with 2:1 hexane/ethyl acetate, 750 mg

출처 및 근거

ORD 기록
ord-b84c730af82c4e75aca1149677adb0ba
출처 데이터셋
uspto-grants-1996_09
DOI
10.6084/m9.figshare.5104873.v1
특허 번호
US05552397

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