Cesium carbonate → 5-Bromo-3-(5-fluoropyridin-2-ylamino)-1-methylpyridin-2(1H)-one

HRID 1918887Notes

Reaction equation

HRID 1918887 reaction equation
[F:1][C:2]1[CH:3]=[CH:4][C:5]([NH2:8])=[N:6][CH:7]=1.Br[C:10]1[C:11](=[O:18])[N:12]([CH3:17])[CH:13]=[C:14]([Br:16])[CH:15]=1.C(=O)([O-])[O-].[Cs+].[Cs+].CC1(C)C2C(=C(P(C3C=CC=CC=3)C3C=CC=CC=3)C=CC=2)OC2C(P(C3C=CC=CC=3)C3C=CC=CC=3)=CC=CC1=2>C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.[Pd].[Pd].O1CCOCC1>[Br:16][C:14]1[CH:15]=[C:10]([NH:8][C:5]2[CH:4]=[CH:3][C:2]([F:1])=[CH:7][N:6]=2)[C:11](=[O:18])[N:12]([CH3:17])[CH:13]=1

Participants

7

Reactant 4

HCID 10796Cesium carbonateHCID 6360441,1'-(9,9-Dimethyl-9H-xanthene-4,5-diyl)bis(1,1-diphenylphosphine)HCID 27377012-Amino-5-fluoropyridineHCID 36143503,5-Dibromo-1-methylpyridin-2(1H)-one

Product 1

HCID 580442815-Bromo-3-(5-fluoropyridin-2-ylamino)-1-methylpyridin-2(1H)-oneYield 61%

Reagents, catalysts & solvents 2

HCID 9811564Bis(dibenzylideneacetone)palladiumCatalystHCID 312751,4-DioxaneSolvent

Procedure

A 100-mL single-neck round-bottomed flask equipped with a magnetic stirrer and reflux condenser was charged with 1,4-dioxane (50 mL), 5-fluoropyridin-2-amine (0.67 g, 6 mmol), 3,5-dibromo-1-methylpyridin-2(1H)-one (1.34 g, 5 mmol) and cesium carbonate (4.89 g, 15 mmol). After bubbling nitrogen through the resulting solution for 30 minutes, XantPhos (576 mg, 1 mmol) and tris(dibenzylideneacetone)dipalladium(0) (460 mg, 0.5 mmol) were added, and the reaction mixture was heated at reflux for 15 h. After this time the reaction was cooled to room temperature, partitioned between ethyl acetate (100 mL) and water (100 mL) and filtered. The aqueous layer was separated and extracted with ethyl acetate (50 mL×2). The organic layers were combined and washed with brine (50 mL) and dried over sodium sulfate. The drying agent was removed by filtration and the filtrate was concentrated under reduced pressure. The residue was washed with acetonitrile (30 mL) and filtered to afford 148a (900 mg, 61%). MS: [M+H]+ 298.

Workup

  1. customA 100-mL single-neck round-bottomed flask equipped with a magnetic stirrer
  2. temperaturereflux condenser
  3. customAfter bubbling nitrogen through the resulting solution for 30 minutes
  4. temperaturethe reaction mixture was heated
  5. temperatureat reflux for 15 h
  6. custompartitioned between ethyl acetate (100 mL) and water (100 mL)
  7. filtrationfiltered
  8. customThe aqueous layer was separated
  9. extractionextracted with ethyl acetate (50 mL×2)
  10. washwashed with brine (50 mL)
  11. dry with materialdried over sodium sulfate
  12. customThe drying agent was removed by filtration
  13. concentrationthe filtrate was concentrated under reduced pressure
  14. washThe residue was washed with acetonitrile (30 mL)
  15. filtrationfiltered

Sources & evidence

ORD record
ord-928afa2934d741418fbd9ee757d7aa96
Source dataset
uspto-grants-2013_12
Patent number
US08618107B2

Reaction notes

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