Potassium Carbonate → 2-Ethyl-6-(2-methoxy-4-trifluoromethoxy-phenyl)-5-methyl-3-nitro-pyridine

HRID 1354242Notes

Reaction equation

HRID 1354242 reaction equation
Cl[C:2]1[C:7]([N+:8]([O-:10])=[O:9])=[CH:6][C:5]([CH3:11])=[C:4]([C:12]2[CH:17]=[CH:16][C:15]([O:18][C:19]([F:22])([F:21])[F:20])=[CH:14][C:13]=2[O:23][CH3:24])[N:3]=1.[CH2:25](B(O)O)[CH3:26].C(=O)([O-])[O-].[K+].[K+]>C1(C)C=CC=CC=1.C1C=CC([P]([Pd]([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)[P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1>[CH2:25]([C:2]1[C:7]([N+:8]([O-:10])=[O:9])=[CH:6][C:5]([CH3:11])=[C:4]([C:12]2[CH:17]=[CH:16][C:15]([O:18][C:19]([F:22])([F:21])[F:20])=[CH:14][C:13]=2[O:23][CH3:24])[N:3]=1)[CH3:26]

Participants

6

Reactant 3

HCID 11430Potassium CarbonateHCID 521157Ethylboronic acidHCID 224900592-Chloro-6-(2-methoxy-4-trifluoromethoxy-phenyl)-5-methyl-3-nitro-pyridine

Product 1

HCID 211047882-Ethyl-6-(2-methoxy-4-trifluoromethoxy-phenyl)-5-methyl-3-nitro-pyridine

Reagents, catalysts & solvents 2

HCID 178418397HCID 178418397, compoundCatalystHCID 1140TolueneSolvent

Procedure

Tetrakistriphenylphosphinepalladium(0) (0.03 g, 0.03 mmol) is added to 2-chloro-6-(2-methoxy-4-trifluoromethoxy-phenyl)-5-methyl-3-nitro-pyridine (0.10 g, 0.27 mmol) in toluene (5 mL). Ethyl boronic acid (0.1 g, 1.1 mmol) and potassium carbonate (0.07 g, 0.55 mmol)) are added to this solution, and the reaction is heated to reflux for 17 hours. The product is extracted with ethyl acetate (20 mL). Combined extracts are washed with brine (20 mL), dried over sodium sulfate, and concentrated in vacuo. Purification by flash column chromatography (5% EtOAC-hexane) yields 2-ethyl-6-(2-methoxy-4-trifluoromethoxy-phenyl)-5-methyl-3-nitro-pyridine as a yellow solid TLC Rf 0.55 (elution with 10% ethyl acetate-hexane)

Workup

  1. temperaturethe reaction is heated
  2. temperatureto reflux for 17 hours
  3. extractionThe product is extracted with ethyl acetate (20 mL)
  4. washCombined extracts are washed with brine (20 mL)
  5. dry with materialdried over sodium sulfate
  6. concentrationconcentrated in vacuo
  7. customPurification by flash column chromatography (5% EtOAC-hexane)
  8. customyields
  9. wash2-ethyl-6-(2-methoxy-4-trifluoromethoxy-phenyl)-5-methyl-3-nitro-pyridine as a yellow solid TLC Rf 0.55 (elution with 10% ethyl acetate-hexane)

Sources & evidence

ORD record
ord-f5a6c076e3eb4efc86f2cd89bb2ad8f5
Source dataset
uspto-grants-2007_05
Patent number
US07223778B2

Reaction notes

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