Azobisisobutyronitrile → Ethyl [4-chloro-7-(1-ethylpropyl)-2-oxo-2,3-dihydro-1H-benzimidazol-1-yl]acetate

HRID 1628390노트

반응식

HRID 1628390 반응식
[CH2:1]([CH:3]([C:6]1[C:11]2[N:12]([CH2:16][C:17]([O:19][CH2:20][CH3:21])=[O:18])[C:13](=[O:15])[NH:14][C:10]=2[CH:9]=[CH:8][CH:7]=1)[CH2:4][CH3:5])[CH3:2].N(C(C)(C)C#N)=NC(C)(C)C#N.[Cl:34]N1C(=O)CCC1=O>ClC1C=CC=CC=1>[Cl:34][C:9]1[C:10]2[NH:14][C:13](=[O:15])[N:12]([CH2:16][C:17]([O:19][CH2:20][CH3:21])=[O:18])[C:11]=2[C:6]([CH:3]([CH2:4][CH3:5])[CH2:1][CH3:2])=[CH:7][CH:8]=1

참가 물질

5

반응물 3

HCID 6547AzobisisobutyronitrileHCID 31398ChlorosuccinimideHCID 86632858Ethyl [7-(1-ethylpropyl)-2-oxo-2,3-dihydro-1H-benzimidazol-1-yl]acetate

생성물 1

HCID 86632859Ethyl [4-chloro-7-(1-ethylpropyl)-2-oxo-2,3-dihydro-1H-benzimidazol-1-yl]acetate수율 63.2%

시약·촉매·용매 1

HCID 7964Chlorobenzene용매

반응 조건

온도
70 °C

실험 절차

To a solution of ethyl [7-(1-ethylpropyl)-2-oxo-2,3-dihydro-1H-benzimidazol-1-yl]acetate (3.91 g, 13.5 mmol) and 2,2′-azobisisobutyronitrile (222 mg, 1.35 mmol) in chlorobenzene (40 mL) was added portionwise N-chlorosuccinimide (1.80 g, 13.5 mmol) at 65° C., and the mixture was stirred at 70° C. for 2 days. After cooling, the reaction mixture was washed with saturated aqueous sodium hydrogen carbonate. The aqueous layer was separated and extracted with ethyl acetate. The organic layer was washed with brine, dried over anhydrous sodium sulfate and concentrated in vacuo. The residue was purified by silica gel column chromatography eluting with a 15-50% ethyl acetate/n-hexane gradient mixture, and the fractions containing the title compound were concentrated in vacuo. The mixture was suspended in diisopropyl ether, and the suspension was stirred at 60° C. for 2 hr. After cooling, the resulting solid was collected by filtration and washed with n-hexane to give the title compound (2.77 g, 8.53 mmol, 63%) as a colorless solid.

후처리

  1. temperatureAfter cooling
  2. washthe reaction mixture was washed with saturated aqueous sodium hydrogen carbonate
  3. customThe aqueous layer was separated
  4. extractionextracted with ethyl acetate
  5. washThe organic layer was washed with brine
  6. dry with materialdried over anhydrous sodium sulfate
  7. concentrationconcentrated in vacuo
  8. customThe residue was purified by silica gel column chromatography
  9. washeluting with a 15-50% ethyl acetate/n-hexane gradient mixture
  10. additionthe fractions containing the title compound
  11. concentrationwere concentrated in vacuo
  12. stirringthe suspension was stirred at 60° C. for 2 hr
  13. temperatureAfter cooling
  14. filtrationthe resulting solid was collected by filtration
  15. washwashed with n-hexane

출처 및 근거

ORD 기록
ord-09c84dca37a544d79b06cb2d5d883b0f
출처 데이터셋
uspto-grants-2014_07
특허 번호
US08785460B2

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