Ethyl Acetate → 7-(2,4-Dichlorophenyl)-2-ethyl-3-nitropyrazolo[1,5-a]pyridine

HRID 1864985

반응식

HRID 1864985 반응식
[Cl:1][C:2]1[CH:7]=[C:6]([Cl:8])[CH:5]=[CH:4][C:3]=1[C:9]1[N:14]2[N:15]=[C:16]([CH2:18][CH3:19])[CH:17]=[C:13]2[CH:12]=[CH:11][CH:10]=1.F[B-](F)(F)F.[O:25]=[N+:26]=[O:27].C(OCC)(=O)C>C(#N)C>[Cl:1][C:2]1[CH:7]=[C:6]([Cl:8])[CH:5]=[CH:4][C:3]=1[C:9]1[N:14]2[N:15]=[C:16]([CH2:18][CH3:19])[C:17]([N+:26]([O-:27])=[O:25])=[C:13]2[CH:12]=[CH:11][CH:10]=1

참가 물질

5

반응물 3

HCID 8857Ethyl AcetateHCID 11073463Nitronium tetrafluoroborateHCID 219846357-(2,4-Dichlorophenyl)-2-ethylpyrazolo[1,5-a]pyridine

생성물 1

HCID 219846667-(2,4-Dichlorophenyl)-2-ethyl-3-nitropyrazolo[1,5-a]pyridine수율 35.6%

시약·촉매·용매 1

HCID 6342Acetonitrile용매

실험 절차

After dissolving 7-(2,4-dichlorophenyl)-2-ethylpyrazolo[1,5-a]pyridine (280 mg) in acetonitrile (20 mL), nitronium tetrafluoroborate (255 mg) was added 4 times at 30 minute intervals while stirring on ice. The reaction mixture was added to ice water, extraction was performed with ethyl acetate and the extract washed with water and brine. After drying over anhydrous magnesium sulfate and filtration, the solvent was concentrated under reduced pressure, the residue was purified by silica gel column chromatography, and the title compound (115 mg) was obtained from the n-hexane:ethyl acetate (20:1) fraction as yellow crystals.

후처리

  1. additionwas added 4 times at 30 minute intervals
  2. washthe extract washed with water and brine
  3. dry with materialAfter drying over anhydrous magnesium sulfate and filtration
  4. concentrationthe solvent was concentrated under reduced pressure
  5. customthe residue was purified by silica gel column chromatography

출처 및 근거

ORD 기록
ord-2193a05f7a4f4514a0880e7a83c7f38d
출처 데이터셋
uspto-grants-2009_12
특허 번호
US07625925B2

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