Pyridine → 4-(1-(1H)-Imidazolyl)-1-phenyl-1-butanone O-(2-aminoethyl)oxime dihydrochloride

HRID 265272노트

반응식

HRID 265272 반응식
[N:1]1([CH2:6][CH2:7][CH2:8][C:9]([C:11]2[CH:16]=[CH:15][CH:14]=[CH:13][CH:12]=2)=O)[CH:5]=[CH:4][N:3]=[CH:2]1.[ClH:17].Cl.[NH2:19][CH2:20][CH2:21][O:22][NH2:23].N1C=CC=CC=1>C(O)C>[ClH:17].[ClH:17].[NH2:19][CH2:20][CH2:21][O:22][N:23]=[C:9]([C:11]1[CH:16]=[CH:15][CH:14]=[CH:13][CH:12]=1)[CH2:8][CH2:7][CH2:6][N:1]1[CH:5]=[CH:4][N:3]=[CH:2]1

참가 물질

5

반응물 3

HCID 1049PyridineHCID 130844144-(1-(1H)-imidazolyl)-1-phenyl-1-butanoneHCID 143623262-(O-aminooxy)ethylamine dihydrochloride

생성물 1

HCID 734741694-(1-(1H)-Imidazolyl)-1-phenyl-1-butanone O-(2-aminoethyl)oxime dihydrochloride수율 217.5%

시약·촉매·용매 1

HCID 702Ethanol용매

실험 절차

A mixture of 4-(1-(1H)-imidazolyl)-1-phenyl-1-butanone (3.00 g), O-(2-aminoethyl)hydroxylamine dihydrochloride (2.50 g), 3 equivalents of pyridine, and absolute ethanol (75 ml) was heated under reflux, under nitrogen, with stirring, overnight. The reaction mixture was evaporated, toluene was added and evaporated. The residue was partitioned between 10% sodium hydroxide solution and ethyl acetate. The layers were separated and the aqueous phase extracted with ethyl acetate. The combined organic extracts were dried over anhydrous sodium sulfate, filtered, and the filtrate was evaporated. The residue was combined with 5.0 g of crude, previously prepared material and purified by flash chromatography (180:19:1 dichloromethane/methanol/ammonium hydroxide). The appropriate fractions were collected and concentrated. The residue was dissolved in absolute ethanol and treated with ethereal hydrogen chloride. Diethyl ether was added. The precipitate was collected and recrystallized from absolute ethanol to give 6.3 g (58%) of product, mp 196°-198° C. (dec).

후처리

  1. temperaturewas heated
  2. temperatureunder reflux, under nitrogen
  3. customThe reaction mixture was evaporated
  4. additiontoluene was added
  5. customevaporated
  6. customThe residue was partitioned between 10% sodium hydroxide solution and ethyl acetate
  7. customThe layers were separated
  8. extractionthe aqueous phase extracted with ethyl acetate
  9. dry with materialThe combined organic extracts were dried over anhydrous sodium sulfate
  10. filtrationfiltered
  11. customthe filtrate was evaporated
  12. custompurified by flash chromatography (180:19:1 dichloromethane/methanol/ammonium hydroxide)
  13. customThe appropriate fractions were collected
  14. concentrationconcentrated
  15. dissolutionThe residue was dissolved in absolute ethanol
  16. additiontreated with ethereal hydrogen chloride
  17. additionDiethyl ether was added
  18. customThe precipitate was collected
  19. customrecrystallized from absolute ethanol

출처 및 근거

ORD 기록
ord-d923a85ba85c4596ba3c56772d303566
출처 데이터셋
uspto-grants-1997_07
특허 번호
US05648367

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