Potassium Carbonate → 3-Fluoro-4-nitroaniline

HRID 2038124

반응식

HRID 2038124 반응식
[F:1][C:2]1[CH:3]=[C:4]([NH:11]C(=O)C(C)(C)C)[CH:5]=[CH:6][C:7]=1[N+:8]([O-:10])=[O:9].C(=O)([O-])[O-].[K+].[K+]>C(Cl)Cl.Cl.C(OCC)(=O)C>[F:1][C:2]1[CH:3]=[C:4]([CH:5]=[CH:6][C:7]=1[N+:8]([O-:10])=[O:9])[NH2:11]

참가 물질

6

반응물 2

HCID 11430Potassium CarbonateHCID 59129487N-(3-fluoro-4-nitro-phenyl)-2,2-dimethyl-propionamide

생성물 1

HCID 754013-Fluoro-4-nitroaniline수율 99.6%

시약·촉매·용매 3

HCID 313Hydrochloric Acid용매HCID 6344Dichloromethane용매HCID 8857Ethyl Acetate용매

실험 절차

A mixture of N-(3-fluoro-4-nitro-phenyl)-2,2-dimethyl-propionamide (87.0 g, 0.36 mol) in CH2Cl2 (400 mL) and 6N hydrochloric acid (800 mL) was heated to reflux for 2 hours. The reaction mixture was cooled to room temperature. The reaction mixture was diluted with 1000 mL of ethyl acetate and potassium carbonate (500.0 g) was added portion wise. The aqueous solution was separated and the organic layer was washed with brine and dried over anhydrous Na2SO4. The solvent was removed by evaporation under reduced pressure; the residue was purified by column chromatography on silica gel (petroleum ether/ethyl acetate 30:1) to afford 3-fluoro-4-nitroaniline (56.0 g, 99%). 1H NMR (300 MHz, CDCl3) δ 8.07 (t, J=8.7 Hz, 1 H), 7.86 (dd, J=2.1, 13.2 Hz 1 H), 7.59 (brs, 2 H), 7.22 (s, 1 H).

후처리

  1. temperaturewas heated
  2. temperatureto reflux for 2 hours
  3. additionwas added portion wise
  4. customThe aqueous solution was separated
  5. washthe organic layer was washed with brine
  6. dry with materialdried over anhydrous Na2SO4
  7. customThe solvent was removed by evaporation under reduced pressure
  8. customthe residue was purified by column chromatography on silica gel (petroleum ether/ethyl acetate 30:1)

출처 및 근거

ORD 기록
ord-5ca8e23a361a46e2b76ffd0f21cc276d
출처 데이터셋
uspto-grants-2013_11
특허 번호
US08575209B2

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