2-Fluoropyridine-3-boronic acid → HCID 58266636, 화합물

HRID 1888396노트

반응식

HRID 1888396 반응식
[Br:1][C:2]1[N:7]=[CH:6][C:5]([NH2:8])=[C:4](I)[CH:3]=1.[F:10][C:11]1[C:16](B(O)O)=[CH:15][CH:14]=[CH:13][N:12]=1>C(#N)C.[F-].[K+]>[Br:1][C:2]1[N:7]=[CH:6][C:5]([NH2:8])=[C:4]([C:16]2[C:11]([F:10])=[N:12][CH:13]=[CH:14][CH:15]=2)[CH:3]=1

참가 물질

5

반응물 2

HCID 27832702-Fluoropyridine-3-boronic acidHCID 582664856-Bromo-4-iodopyridin-3-amine

생성물 1

HCID 58266636HCID 58266636, 화합물수율 39.1%

시약·촉매·용매 2

HCID 6342Acetonitrile용매HCID 522689Potassium Fluoride용매

반응 조건

온도
70 °C

실험 절차

A mixture of 6-bromo-4-iodo-pyridin-3-ylamine (10.0 g, 33.4 mmol), 2-fluoropyridine-3-boronic acid (5.2 g, 36.8 mmol) and 1,1′-[bis(diphenylphosphino)ferrocene]dichloropalladium(II) dichloromethane complex (2.73 g, 3.34 mmol) in acetonitrile (150 mL) and 1N aqueous potassium fluoride solution (150 mL) was degassed with nitrogen for 20 minutes. The reaction mixture was heated at 70° C. for 2.5 h, allowed to cool to ambient temperature and then partitioned between ethyl acetate (400 mL) and water (150 mL). The organic layer was separated, dried over anhydrous sodium sulfate, filtered and evaporated in vacuo. The resultant solid residue was triturated with dichloromethane: methanol (1:1, 100 mL), collected by filtration and washed with diethyl ether (50 mL) to furnish the title compound as a brown solid (3.5 g, 39%). The filtrate was evaporated and purified by passing the resultant residue through a pad of silica eluting with ethyl acetate:cyclohexane (1:1). Collection of the appropriate fractions and evaporation to dryness afforded a solid that was then triturated with diethyl ether to afford the title compound as a brown solid (3.7 g, 42%) (combined yield—7.22 g, 81%). 1H NMR (CDCl3, 300 MHz): 8.34 (ddd, J=4.9, 2.0, 1.2 Hz, 1H), 7.99 (s, 1H), 7.85 (ddd, J=9.4, 7.4, 2.0 Hz, 1H), 7.37 (ddd, J=7.4, 4.9, 2.0 Hz, 1H), 7.22 (s, 1H), 3.75 (s, 2H). LCMS (Method B): RT=2.78 min, M+H+=268/270.

후처리

  1. customwas degassed with nitrogen for 20 minutes
  2. temperatureto cool to ambient temperature
  3. custompartitioned between ethyl acetate (400 mL) and water (150 mL)
  4. customThe organic layer was separated
  5. dry with materialdried over anhydrous sodium sulfate
  6. filtrationfiltered
  7. customevaporated in vacuo
  8. customThe resultant solid residue was triturated with dichloromethane: methanol (1:1, 100 mL)
  9. filtrationcollected by filtration
  10. washwashed with diethyl ether (50 mL)

출처 및 근거

ORD 기록
ord-f6c22f667f8c4b10b09d1eb7d3311d91
출처 데이터셋
uspto-grants-2013_08
특허 번호
US08501765B2

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