2-tert-Butyl-1,3-diisopropylisourea → 4-(4-Bromo-2-fluoro-phenylamino)-6-chloro-pyridazine-3-carboxylic acid tert-butyl ester

HRID 1161814노트

반응식

HRID 1161814 반응식
[Br:1][C:2]1[CH:7]=[CH:6][C:5]([NH:8][C:9]2[CH:14]=[C:13]([Cl:15])[N:12]=[N:11][C:10]=2[C:16]([OH:18])=[O:17])=[C:4]([F:19])[CH:3]=1.[C:20](OC(=NC(C)C)NC(C)C)([CH3:23])([CH3:22])[CH3:21]>C1COCC1.C(OCC)(=O)C>[C:20]([O:17][C:16]([C:10]1[N:11]=[N:12][C:13]([Cl:15])=[CH:14][C:9]=1[NH:8][C:5]1[CH:6]=[CH:7][C:2]([Br:1])=[CH:3][C:4]=1[F:19])=[O:18])([CH3:23])([CH3:22])[CH3:21]

참가 물질

5

반응물 2

HCID 110417822-tert-Butyl-1,3-diisopropylisoureaHCID 595194954-(4-Bromo-2-fluoro-phenylamino)-6-chloro-pyridazine-3-carboxylic acid

생성물 1

HCID 595194124-(4-Bromo-2-fluoro-phenylamino)-6-chloro-pyridazine-3-carboxylic acid tert-butyl ester

시약·촉매·용매 2

HCID 8028Tetrahydrofuran용매2회HCID 8857Ethyl Acetate용매

실험 절차

To the stirred solution of 4-(4-bromo-2-fluoro-phenylamino)-6-chloro-pyridazine-3-carboxylic acid (516 gm, 1.49 mmol) in THF (10 ml) under argon at room temperature is added a solution of 2-tert-butyl-1,3-diisopropylisourea (1.49 g, 7.45 mmol) in THF (1.0 ml). The resulted mixture is refluxed for 6 hours. The reaction mixture is then cooled to room temperature and diluted with ethyl acetate. The organic layer is washed with 10% K2CO3 (20 ml×2) and saturated NaCl (30 ml×3), dried over Na2SO4 and concentrated in vacuum. The residue is dissolved in 30 ml of dichloromethane and the resulting white solid (urea byproduct) is filtered out. The filtrate is concentrated under reduced pressure. The residue is purified by flash column chromatography to provide the desired product.

후처리

  1. temperatureThe resulted mixture is refluxed for 6 hours
  2. washThe organic layer is washed with 10% K2CO3 (20 ml×2) and saturated NaCl (30 ml×3)
  3. dry with materialdried over Na2SO4
  4. concentrationconcentrated in vacuum
  5. dissolutionThe residue is dissolved in 30 ml of dichloromethane
  6. filtrationthe resulting white solid (urea byproduct) is filtered out
  7. concentrationThe filtrate is concentrated under reduced pressure
  8. customThe residue is purified by flash column chromatography

출처 및 근거

ORD 기록
ord-d751dfec6de741ecbb271d61381ba469
출처 데이터셋
uspto-grants-2010_10
특허 번호
US07820664B2

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