Potassium Carbonate → HCID 22030186, compound

HRID 1791240Notes

Reaction equation

HRID 1791240 reaction equation
Cl[C:2]1[C:7]([C:8]([F:11])([F:10])[F:9])=[CH:6][CH:5]=[CH:4][N:3]=1.[CH3:12][O:13][C:14]1[CH:19]=[CH:18][C:17](B(O)O)=[CH:16][N:15]=1.C(=O)([O-])[O-].[K+].[K+]>C1(C)C=CC=CC=1.[Pd].C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1>[CH3:12][O:13][C:14]1[N:15]=[CH:16][C:17]([C:2]2[C:7]([C:8]([F:11])([F:10])[F:9])=[CH:6][CH:5]=[CH:4][N:3]=2)=[CH:18][CH:19]=1

Participants

6

Reactant 3

HCID 11430Potassium CarbonateHCID 5898332-Chloro-3-(trifluoromethyl)pyridineHCID 2734368(6-Methoxypyridin-3-yl)boronic acid

Product 1

HCID 22030186HCID 22030186, compoundYield 95%

Reagents, catalysts & solvents 2

HCID 11979704Tetrakis(triphenylphosphine)palladiumCatalystHCID 1140TolueneSolvent

Procedure

Heat a mixture of 2-chloro-3-trifluoromethylpyridine (37 g, 0.2 mol), 2-methoxypyridine-5-boronic acid (32 g, 0.21 mol), tetrakis(triphenylphosphine) palladium(0) (9 g, 7 mmol) and 2M potassium carbonate (150 mL) in toluene (500 mL) under a nitrogen atmosphere, at 90° C. for 8 hours. Cool the reaction mixture and separate the layers. Extract the aqueous layer with ethyl acetate (2×250 mL) and wash the combined organics with 4M sodium hydroxide (250 mL), water (250 mL), and brine (250 mL). Dry (MgSO4) and concentrate under reduced pressure. Purify the oil by flash chromatography on silica gel (50% ether/50% hexane) to give the title compound (48.2 g, 95%) as a colorless oil.

Workup

  1. temperatureHeat
  2. temperatureCool the reaction mixture
  3. customseparate the layers
  4. extractionExtract the aqueous layer with ethyl acetate (2×250 mL)
  5. washwash the combined organics with 4M sodium hydroxide (250 mL), water (250 mL), and brine (250 mL)
  6. dry with materialDry (MgSO4)
  7. concentrationconcentrate under reduced pressure
  8. customPurify the oil by flash chromatography on silica gel (50% ether/50% hexane)

Sources & evidence

ORD record
ord-9cff6c91ca054fd6816673ec0f99cc15
Source dataset
uspto-grants-2006_07
Patent number
US07074799B2

Reaction notes

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