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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 2256452
ノート
印刷プレビュー

反応式

HRID 2256452 の反応式
[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]
参加物実験手順後処理出典と根拠反応ノート

参加物

5

反応物 3

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

生成物 1

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

試薬・触媒・溶媒 1

HCID 8028Tetrahydrofuran
溶媒
2 回

実験手順

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.

後処理

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

出典と根拠

ORDレコード
ord-3e4281c0565c45738ad60fe93602909d
出典データセット
uspto-grants-1997_08
DOI
10.6084/m9.figshare.5104873.v1
特許番号
US05654294

反応ノート

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このページの内容参加物実験手順後処理出典と根拠反応ノート