Dimethylformamide → 2,2'-Difluoro-6-nitro-1,1'-biphenyl

HRID 1776204Notes

Reaction equation

HRID 1776204 reaction equation
Br[C:2]1[C:7]([F:8])=[CH:6][CH:5]=[CH:4][C:3]=1[N+:9]([O-:11])=[O:10].[F:12][C:13]1[CH:18]=[CH:17][CH:16]=[CH:15][C:14]=1B(O)O.CN(C)C=O.C(=O)([O-])[O-].[K+].[K+]>C(OCC)(=O)C.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>[F:8][C:7]1[CH:6]=[CH:5][CH:4]=[C:3]([N+:9]([O-:11])=[O:10])[C:2]=1[C:14]1[CH:15]=[CH:16][CH:17]=[CH:18][C:13]=1[F:12]

Participants

7

Reactant 4

HCID 6228DimethylformamideHCID 11430Potassium CarbonateHCID 27343542-Fluorophenylboronic acidHCID 183734742-Bromo-1-fluoro-3-nitrobenzene

Product 1

HCID 463126102,2'-Difluoro-6-nitro-1,1'-biphenylYield 49%

Reagents, catalysts & solvents 2

HCID 178418397HCID 178418397, compoundCatalystHCID 8857Ethyl AcetateSolvent

Conditions

Temperature
110 °C

Procedure

To a solution of 2-bromo-3-fluoronitrobenzene (1.500 g, 6.8 mmol), 2-fluorophenylboronic acid (1.145 g, 8.2 mmol), N,N-dimethylformamide (50 mL), and 2.0 M aqueous potassium carbonate (10 mL) under argon was added tetrakis(triphenylphosphine)palladium (0) (0.394 g, 0.3 mmol). The mixture was stirred at 110° C. for 16 hrs. After cooling to room temperature, the mixture was diluted with ethyl acetate (100 mL) and washed with saturated aqueous sodium chloride, dried (anhydrous sodium sulfate), filtered, and concentrated in vacuo. The residue was purified by silica gel chromatography (0-30% methylene chloride/hexanes) to afford a pale yellow solid (0.780 g, 49%). 1H NMR (300 MHz, CDCl3) δ 7.86 (dt, 1H, J=7.8, 1.2 Hz), 7.56 (td, 1H, J=8.1, 5.7 Hz), 7.52-7.40 (m, 2H), 7.35-7.15 (m, 3H).

Workup

  1. temperatureAfter cooling to room temperature
  2. washwashed with saturated aqueous sodium chloride
  3. dry with materialdried (anhydrous sodium sulfate)
  4. filtrationfiltered
  5. concentrationconcentrated in vacuo
  6. customThe residue was purified by silica gel chromatography (0-30% methylene chloride/hexanes)

Sources & evidence

ORD record
ord-63cad70ac3414d00a307f07594e61a98
Source dataset
uspto-grants-2016_02
Patent number
US09265772B2

Reaction notes

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