2,6-Dichloro-4-fluoroaniline → (2,6-Dichloro-4-fluorophenyl)hydrazine

HRID 1650774노트

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HRID 1650774 반응식
[Cl:1][C:2]1[CH:8]=[C:7]([F:9])[CH:6]=[C:5]([Cl:10])[C:3]=1[NH2:4].[N:11]([O-])=O.[Na+]>O.Cl>[Cl:1][C:2]1[CH:8]=[C:7]([F:9])[CH:6]=[C:5]([Cl:10])[C:3]=1[NH:4][NH2:11]

참가 물질

5

반응물 2

HCID 27740082,6-Dichloro-4-fluoroanilineHCID 23668193Sodium Nitrite

생성물 1

HCID 14624505(2,6-Dichloro-4-fluorophenyl)hydrazine수율 70.8%

시약·촉매·용매 2

HCID 313Hydrochloric Acid용매2회HCID 962Water용매

실험 절차

9.0 g (0.05 mol) of 2,6-dichloro-4-fluoroaniline was added to 50 ml of concentrated hydrochloric acid, and a solution of 3.8 g (0.055 mol) of sodium nitrite in 25 ml of water was dropwise added thereto at a temperature of from 0° to 5° C. After completion of the dropwise addition, the mixture was stirred at the same temperature for further 1 hour. Insolubles were removed by filtration, and the filtrate was dropwise added at a temperature of from 0° to 10° C. to a solution of 33.8 g (0.15 mol) of stannous chloride dihydrate in 50 ml of concentrated hydrochloric acid. After completion of the dropwise addition, the mixture was stirred at the same temperature for further 2 hours. The precipitated hydrochloride was collected by filtration, and 50 ml of water was added thereto. The mixture was made alkaline with an addition of 20% sodium hydroxide, and the precipitated solid was extracted with ethyl ether. The ethyl ether layer was washed with water and dried over anhydrous sodium sulfate. Then, the solvent was distilled off. The residue thereby obtained was washed with cold n-hexane to obtain 6.9 g (yield: 70.4%) of the desired compound as white feather-like crystals. Melting point: 117°-119° C.

후처리

  1. customof from 0° to 5° C
  2. additionAfter completion of the dropwise addition
  3. customInsolubles were removed by filtration
  4. additionAfter completion of the dropwise addition
  5. stirringthe mixture was stirred at the same temperature for further 2 hours
  6. filtrationThe precipitated hydrochloride was collected by filtration, and 50 ml of water
  7. additionwas added
  8. additionwith an addition of 20% sodium hydroxide
  9. extractionthe precipitated solid was extracted with ethyl ether
  10. washThe ethyl ether layer was washed with water
  11. dry with materialdried over anhydrous sodium sulfate
  12. distillationThen, the solvent was distilled off
  13. customThe residue thereby obtained
  14. washwas washed with cold n-hexane

출처 및 근거

ORD 기록
ord-6ca8d50d50fb4d6d82945c174057b1d6
출처 데이터셋
uspto-grants-1990_05
특허 번호
US04925864

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