Sodium hydride → HCID 59834408, compound

HRID 271081Notes

Reaction equation

HRID 271081 reaction equation
[F:1][C:2]1[CH:7]=[C:6]([F:8])[CH:5]=[CH:4][C:3]=1[OH:9].[H-].[Na+].[Br:12][C:13]1[C:14](Cl)=[N:15][C:16](Cl)=[N:17][CH:18]=1>C1COCC1>[Br:12][C:13]1[C:14]([O:9][C:3]2[CH:4]=[CH:5][C:6]([F:8])=[CH:7][C:2]=2[F:1])=[N:15][C:16]([O:9][C:3]2[CH:4]=[CH:5][C:6]([F:8])=[CH:7][C:2]=2[F:1])=[N:17][CH:18]=1

Participants

5

Reactant 3

HCID 24758Sodium hydrideHCID 1230512,4-DifluorophenolHCID 2899735-Bromo-2,4-dichloropyrimidine

Product 1

HCID 59834408HCID 59834408, compoundYield 27.7%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Conditions

Temperature
0 °C

Procedure

2,4-Difluorophenol (22 mL, 241.34 mmol) was dissolved in 140 mL of dry THF and cooled to 0° C. Sodium hydride (9.43 g, 235.85 mmol, 60% suspension in oil) was added in portions, and the reaction mixture was stirred for 30 minutes at 0° C. 5-Bromo-2,4-dichloro-pyrimidine (25.0 g, 109.7 mmol) was added in portions over 10 minutes, and the reaction mixture was allowed to warm to room temperature and was stirred overnight at room temperature. The reaction was quenched by addition of 30 mL saturated aqueous ammonium chloride and 100 mL of water. The aqueous mixture was extracted three times with 100 mL EtOAc, and the combined organic layers were dried (MgSO4), filtered, and the filtrate was evaporated under reduced pressure. The residue was purified by FLASH chromatography (2% to 6% EtOAc/Hexanes. The resulting solid was recrystallized from diethyl ether/hexanes to afford 12.6 g of 5-bromo-2,4-bis-(2,4-difluoro-phenoxy)-pyrimidine as a white solid. Mass Spec. M+H=416.

Workup

  1. temperatureto warm to room temperature
  2. stirringwas stirred overnight at room temperature
  3. customThe reaction was quenched by addition of 30 mL saturated aqueous ammonium chloride and 100 mL of water
  4. extractionThe aqueous mixture was extracted three times with 100 mL EtOAc
  5. dry with materialthe combined organic layers were dried (MgSO4)
  6. filtrationfiltered
  7. customthe filtrate was evaporated under reduced pressure
  8. customThe residue was purified by FLASH chromatography (2% to 6% EtOAc/Hexanes
  9. customThe resulting solid was recrystallized from diethyl ether/hexanes

Sources & evidence

ORD record
ord-b808c03428354851afdfffae13c7b4f1
Source dataset
uspto-grants-2008_11
Patent number
US07452880B2

Reaction notes

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