Water → 2-Bromo-4-fluoro-6-nitroaniline

HRID 53725

반응식

HRID 53725 반응식
[F:1][C:2]1[CH:8]=[CH:7][C:5]([NH2:6])=[C:4]([N+:9]([O-:11])=[O:10])[CH:3]=1.[Br:12]N1C(=O)CCC1=O.O>CN(C=O)C>[Br:12][C:7]1[C:5]([NH2:6])=[C:4]([N+:9]([O-:11])=[O:10])[CH:3]=[C:2]([F:1])[CH:8]=1

참가 물질

5

반응물 3

HCID 962WaterHCID 67184N-bromobutanimideHCID 677694-Fluoro-2-nitroaniline

생성물 1

HCID 2920042-Bromo-4-fluoro-6-nitroaniline

시약·촉매·용매 1

HCID 6228Dimethylformamide용매2회

실험 절차

6-Bromo-4-fluoro-2-nitroaniline was prepared using an adaptation of the method of Mitchell et al., J. Org. Chem. 44: 4733 (1979). To a solution of 4-fluoro-2-nitroaniline (500 mg, 3.2 mmol) in dry DMF (16 mL) under N2 was added dropwise a solution of N-bromosuccinimide (570 mg, 3.2 mmol) in dry DMF (16 mL). The reaction was allowed to stir 24 h. The solution was then poured into 100 mL H2O and this aqueous phase extracted with 4×25 mL CH2Cl2. The combined organic phases were washed with 3×4 mL H2O and dried (MgSO4). The MgSO4 was vacuum filtered and the solvent rotary evaporated to yield a brown oil which crystallized on standing. 642 mg (85.4%). 1H NMR (CDCl3) δ 6.51 (br s, 2H NH2), 7.58 (dd, JH4-3 -3 Hz, JH4-F =6.5 Hz, H-4), 7.92 (dd, JH3-F =3 Hz, JH3-F =8.7 Hz, H-3).

후처리

  1. extractionthis aqueous phase extracted with 4×25 mL CH2Cl2
  2. washThe combined organic phases were washed with 3×4 mL H2O
  3. dry with materialdried (MgSO4)
  4. filtrationfiltered
  5. customthe solvent rotary evaporated
  6. customto yield a brown oil which
  7. customcrystallized

출처 및 근거

ORD 기록
ord-062ecdfb9527417fbd24c7be4f4f6ae9
출처 데이터셋
uspto-grants-1997_04
특허 번호
US05620979

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