3-Nitrophenylboronic Acid → 3-(3-Trifluoromethylpyridin-2-yl)nitrobenzene

HRID 1059911Notes

Reaction equation

HRID 1059911 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.[N+:12]([C:15]1[CH:16]=[C:17](B(O)O)[CH:18]=[CH:19][CH:20]=1)([O-:14])=[O:13].C(=O)([O-])[O-].[Na+].[Na+]>COCCOC.C(OCC)(=O)C.[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>[F:9][C:8]([F:11])([F:10])[C:7]1[C:2]([C:19]2[CH:20]=[C:15]([N+:12]([O-:14])=[O:13])[CH:16]=[CH:17][CH:18]=2)=[N:3][CH:4]=[CH:5][CH:6]=1

Participants

7

Reactant 3

HCID 16773-Nitrophenylboronic AcidHCID 10340Sodium CarbonateHCID 5898332-Chloro-3-(trifluoromethyl)pyridine

Product 1

HCID 186675723-(3-Trifluoromethylpyridin-2-yl)nitrobenzeneYield 50.5%

Reagents, catalysts & solvents 3

HCID 11979704Tetrakis(triphenylphosphine)palladiumCatalystHCID 80711,2-DimethoxyethaneSolventHCID 8857Ethyl AcetateSolvent

Conditions

Temperature
80 °C

Procedure

To a suspension of 2-chloro-3-trifluoromethylpyridine (908 mg), 3-nitrophenylboronic acid (1.09 g) and tetrakis(triphenylphosphine)-palladium (289 mg) in 1,2-dimethoxyethane (20 ml) was added 2M aqueous solution of sodium carbonate (6.5 ml). The mixture was stirred at 80° C. for 7 hours under a nitrogen atmosphere, then cooled to room temperature and diluted with ethyl acetate. The organic layer was separated, washed with water and brine and dried over sodium sulfate. The solvent was evaporated under reduced pressure. The residue was purified by column chromatography (silica gel 50 g, ethyl acetate:n-hexane=20:80 to 25:75) to give 3-(3-trifluoromethylpyridin-2-yl)-nitrobenzene (677 mg).

Workup

  1. temperaturecooled to room temperature
  2. customThe organic layer was separated
  3. washwashed with water and brine
  4. dry with materialdried over sodium sulfate
  5. customThe solvent was evaporated under reduced pressure
  6. customThe residue was purified by column chromatography (silica gel 50 g, ethyl acetate:n-hexane=20:80 to 25:75)

Sources & evidence

ORD record
ord-edd2d6c8e3234ffdac56ae061e963283
Source dataset
uspto-grants-2003_02
Patent number
US06521643B1

Reaction notes

Loading…