Sodium Carbonate → 4-[4-Fluoro-3-(trifluoromethyl)phenyl]pyridine

HRID 1005800노트

반응식

HRID 1005800 반응식
[N:1]1[CH:6]=[CH:5][C:4](B(O)O)=[CH:3][CH:2]=1.Br[C:11]1[CH:12]=[CH:13][C:14]([F:21])=[C:15]([C:17]([F:20])([F:19])[F:18])[CH:16]=1.C(=O)([O-])[O-].[Na+].[Na+]>C(O)CC.O.C([O-])(=O)C.[Pd+2].C([O-])(=O)C.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1>[F:21][C:14]1[CH:13]=[CH:12][C:11]([C:4]2[CH:5]=[CH:6][N:1]=[CH:2][CH:3]=2)=[CH:16][C:15]=1[C:17]([F:18])([F:19])[F:20]

참가 물질

8

반응물 3

HCID 10340Sodium CarbonateHCID 2734379(Pyridin-4-yl)boronic acidHCID 27363255-Bromo-2-fluorobenzotrifluoride

생성물 1

HCID 219067584-[4-Fluoro-3-(trifluoromethyl)phenyl]pyridine수율 54%

시약·촉매·용매 4

HCID 11776Triphenylphosphine촉매HCID 167845palladium(II) acetate촉매HCID 962Water용매HCID 10311-Propanol용매

실험 절차

First, 4-(4-fluoro-3-trifluoromethyl-phenyl)-pyridine 73 was prepared as follows. To a suspension of pyridine-4-boronic acid (2.59 g, 21.1 mmol) in 1-propanol (60 mL) was added 5-bromo-2-fluorobenzotrifluoride (5.12 g, 21.1 mmol) and triphenylphosphine (0.160 g, 0.610 mmol), followed by sodium carbonate in water (2.0 M, 12 mL). The mixture was purged with nitrogen gas for 10 minutes. To it was added palladium(II) acetate (0.044 g, 0.196 mmol) and it was then heated under reflux for 4 hours. The reaction mixture was partitioned between ethyl acetate (200 mL) and water (200 mL). The organic layer was separated, washed with brine (3×200 mL), dried over MgSO4, then filtered. After evaporating the solvent, the crude material was loaded to a silica gel column, eluting with 60% ethyl acetate in hexane to give a white solid 73 (2.73 g, 54%). 1H-NMR (CDCl3, 400 MHz) δ 7.34-7.42 (m, 1H), 7.61-7.65 (m, 2H), 7.80-7.93 (m, 2H), 8.73-8.84 (m, 2H); MS (DCI) m/z 242, 243 (M+H)+.

후처리

  1. customFirst, 4-(4-fluoro-3-trifluoromethyl-phenyl)-pyridine 73 was prepared
  2. customThe mixture was purged with nitrogen gas for 10 minutes
  3. temperaturewas then heated
  4. temperatureunder reflux for 4 hours
  5. customThe reaction mixture was partitioned between ethyl acetate (200 mL) and water (200 mL)
  6. customThe organic layer was separated
  7. washwashed with brine (3×200 mL)
  8. dry with materialdried over MgSO4
  9. filtrationfiltered
  10. customAfter evaporating the solvent
  11. washeluting with 60% ethyl acetate in hexane

출처 및 근거

ORD 기록
ord-4567dd05ee794e399c74b2266ead8d3c
출처 데이터셋
uspto-grants-2004_09
특허 번호
US06787542B2

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