Cesium carbonate → 5-Bromo-1-methyl-3-(5-methyl-1H-pyrazol-3-ylamino)pyridin-2(1H)-one

HRID 1021645Notes

Reaction equation

HRID 1021645 reaction equation
[CH3:1][C:2]1[NH:6][N:5]=[C:4]([NH2:7])[CH:3]=1.Br[C:9]1[C:10](=[O:17])[N:11]([CH3:16])[CH:12]=[C:13]([Br:15])[CH:14]=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:15][C:13]1[CH:14]=[C:9]([NH:7][C:4]2[CH:3]=[C:2]([CH3:1])[NH:6][N:5]=2)[C:10](=[O:17])[N:11]([CH3:16])[CH:12]=1

Participants

7

Reactant 4

HCID 10796Cesium carbonateHCID 931461H-Pyrazol-3-amine, 5-methyl-HCID 6360441,1'-(9,9-Dimethyl-9H-xanthene-4,5-diyl)bis(1,1-diphenylphosphine)HCID 36143503,5-Dibromo-1-methylpyridin-2(1H)-one

Product 1

HCID 580441425-Bromo-1-methyl-3-(5-methyl-1H-pyrazol-3-ylamino)pyridin-2(1H)-oneYield 35.3%

Reagents, catalysts & solvents 2

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

Conditions

Temperature
100 °C

Procedure

A 100-mL single-neck round-bottomed flask equipped with a magnetic stirrer and reflux condenser was charged with 1,4-dioxane (15 mL), 5-methyl-1H-pyrazol-3-amine (1 g, 10 mmol) (1), 3,5-dibromo-1-methylpyridin-2(1H)-one (4 g, 15 mmol) (2), and cesium carbonate (6.4 g, 20 mmol). Xantphos (400 mg, 0.8 mmol) and Pd2(dba)3 (700 mg, 0.8 mmol) were added, and the reaction mixture was heated at 100° C. for 5 h. After this time the reaction was cooled to room temperature and filtered. The filtrate was concentrated under reduced pressure and the residue was purified on flash column eluting with DCM:MeOH (20:1) to afford 115a (1.0 g, 35%). MS: [M+H]+ 283.

Workup

  1. customA 100-mL single-neck round-bottomed flask equipped with a magnetic stirrer
  2. temperaturereflux condenser
  3. temperatureAfter this time the reaction was cooled to room temperature
  4. filtrationfiltered
  5. concentrationThe filtrate was concentrated under reduced pressure
  6. customthe residue was purified on flash column
  7. washeluting with DCM:MeOH (20:1)

Sources & evidence

ORD record
ord-15c1db06c15a423e9d7f9225844edf09
Source dataset
uspto-grants-2014_05
Patent number
US08716274B2

Reaction notes

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