Potassium Carbonate → HCID 56964225, compound

HRID 2407139Notes

Reaction equation

HRID 2407139 reaction equation
Br[C:2]1[N:7]=[N:6][C:5]([NH2:8])=[N:4][C:3]=1[C:9]1[CH:14]=[CH:13][CH:12]=[CH:11][CH:10]=1.[CH3:15][C:16]1[CH:21]=[C:20](B2OC(C)(C)C(C)(C)O2)[CH:19]=[C:18]([C:31]([F:34])([F:33])[F:32])[N:17]=1.C([O-])([O-])=O.[K+].[K+]>O1CCOCC1.O>[CH3:15][C:16]1[CH:21]=[C:20]([C:2]2[N:7]=[N:6][C:5]([NH2:8])=[N:4][C:3]=2[C:9]2[CH:14]=[CH:13][CH:12]=[CH:11][CH:10]=2)[CH:19]=[C:18]([C:31]([F:33])([F:32])[F:34])[N:17]=1

Participants

6

Reactant 3

HCID 11430Potassium CarbonateHCID 673648602-(trifluoromethyl)-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-6-methylpyridineHCID 866761146-Bromo-5-phenyl-1,2,4-triazin-3-amine

Product 1

HCID 56964225HCID 56964225, compoundYield 90%

Reagents, catalysts & solvents 2

HCID 962WaterSolvent2×HCID 312751,4-DioxaneSolvent

Procedure

6-bromo-5-phenyl-1,2,4-triazin-3-amine (1 molar eq.), 2-methyl-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-6-(trifluoromethyl)pyridine (1 molar eq.) and K2CO3 (1.5 molar eq.) are suspended in a mixture of 1,4-dioxane and water (2:1; 10 mL of solvent per gram of bromotriazine). The resulting mixture is degassed, treated with dichlorobis[di-tert-butyl(4-dimethylaminophenyl)phosphino]palladium(II) (2 mol %) and refluxed until full consumption of bromotriazine is observed by LCMS. The cooled reaction mixture is then diluted with water, extracted with DCM and passed through a phase separator. The organic phase is concentrated under reduced pressure and purified by gradient flash chromatography, eluting with mixtures of ethyl acetate and hexanes to afford 6-[2-methyl-6-(trifluoromethyl)pyridin-4-yl]-5-phenyl-1,2,4-triazin-3-amine (90%).

Workup

  1. customThe resulting mixture is degassed
  2. additiontreated with dichlorobis[di-tert-butyl(4-dimethylaminophenyl)phosphino]palladium(II) (2 mol %)
  3. temperaturerefluxed until full consumption of bromotriazine
  4. customThe cooled reaction mixture
  5. extractionextracted with DCM
  6. concentrationThe organic phase is concentrated under reduced pressure
  7. custompurified by gradient flash chromatography
  8. washeluting with mixtures of ethyl acetate and hexanes

Sources & evidence

ORD record
ord-eba9124a9fd843e19097fe55a2a73f0f
Source dataset
uspto-grants-2014_08
Patent number
US08809525B2

Reaction notes

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