Dimethylformamide → N-{2-fluoro-5-[(6-nitropyridin-3-yl)oxy]phenyl}-1,3-dimethyl-1H-pyrazole-5-carboxamide

HRID 1874340

반응식

HRID 1874340 반응식
[F:1][C:2]1[CH:7]=[CH:6][C:5]([OH:8])=[CH:4][C:3]=1[NH:9][C:10]([C:12]1[N:16]([CH3:17])[N:15]=[C:14]([CH3:18])[CH:13]=1)=[O:11].Br[C:20]1[CH:21]=[CH:22][C:23]([N+:26]([O-:28])=[O:27])=[N:24][CH:25]=1.C(=O)([O-])[O-].[Cs+].[Cs+].CN(C)C=O>O>[F:1][C:2]1[CH:7]=[CH:6][C:5]([O:8][C:20]2[CH:25]=[N:24][C:23]([N+:26]([O-:28])=[O:27])=[CH:22][CH:21]=2)=[CH:4][C:3]=1[NH:9][C:10]([C:12]1[N:16]([CH3:17])[N:15]=[C:14]([CH3:18])[CH:13]=1)=[O:11]

참가 물질

6

반응물 4

HCID 6228DimethylformamideHCID 10796Cesium carbonateHCID 8176205-Bromo-2-nitropyridineHCID 57505434N-(2-fluoro-5-hydroxyphenyl)-1,3-dimethyl-1H-pyrazole-5-carboxamide

생성물 1

HCID 68739416N-{2-fluoro-5-[(6-nitropyridin-3-yl)oxy]phenyl}-1,3-dimethyl-1H-pyrazole-5-carboxamide수율 59%

시약·촉매·용매 1

HCID 962Water용매

실험 절차

A mixture of N-(2-fluoro-5-hydroxyphenyl)-1,3-dimethyl-1H-pyrazole-5-carboxamide (9.80 g, 39.3 mmol), 5-bromo-2-nitropyridine (7.14 g, 35.1 mmol), cesium carbonate (14.8 g, 45.3 mmol) and N,N-dimethylformamide (80 mL) was stirred at room temperature for 15 hr. The reaction mixture was diluted with water and extracted with ethyl acetate. The organic layer was washed with water and saturated brine, dried over anhydrous magnesium sulfate and filtrated. The filtrate was concentrated under reduced pressure, and the residue was purified by column chromatography (silica gel, hexane/ethyl acetate=90/10→0/100) to give N-{2-fluoro-5-[(6-nitropyridin-3-yl)oxy]phenyl}-1,3-dimethyl-1H-pyrazole-5-carboxamide (7.68 g, 59%) as a white solid. To a solution of N-{2-fluoro-5-[(6-nitropyridin-3-yl)oxy]phenyl}-1,3-dimethyl-1H-pyrazole-5-carboxamide (7.68 g, 20.7 mmol) thus-obtained in methanol (50 mL) was added palladium carbon (50% water-containing product, 700 mg), and the mixture was stirred under a hydrogen atmosphere at room temperature for 2 hr. The reaction mixture was filtered through celite, and the filtrate was concentrated under reduced pressure. The residue was collected by filtration and washed with ethyl acetate-hexane to give the title compound (6.20 g, 88%) as a white solid.

후처리

  1. extractionextracted with ethyl acetate
  2. washThe organic layer was washed with water and saturated brine
  3. dry with materialdried over anhydrous magnesium sulfate
  4. filtrationfiltrated
  5. concentrationThe filtrate was concentrated under reduced pressure
  6. customthe residue was purified by column chromatography (silica gel, hexane/ethyl acetate=90/10→0/100)

출처 및 근거

ORD 기록
ord-fbc40d259d07416395a598c2c52c136e
출처 데이터셋
uspto-grants-2012_11
특허 번호
US08304557B2

연결된 노트

불러오는 중…