2-Bromobenzonitrile → 3'-Amino-biphenyl-2-carbonitrile

HRID 895114Notes

Reaction equation

HRID 895114 reaction equation
Br[C:2]1[CH:9]=[CH:8][CH:7]=[CH:6][C:3]=1[C:4]#[N:5].O.[NH2:11][C:12]1[CH:13]=[C:14](B(O)O)[CH:15]=[CH:16][CH:17]=1>C(COC)OC.C(=O)([O-])[O-].[Na+].[Na+].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>[NH2:11][C:12]1[CH:17]=[C:16]([C:2]2[C:3]([C:4]#[N:5])=[CH:6][CH:7]=[CH:8][CH:9]=2)[CH:15]=[CH:14][CH:13]=1

Participants

6

Reactant 2

HCID 162722-BromobenzonitrileHCID 143894233-Aminophenylboronic acid monohydrate

Product 1

HCID 13931123'-Amino-biphenyl-2-carbonitrile

Reagents, catalysts & solvents 3

HCID 178418397HCID 178418397, compoundCatalystHCID 80711,2-DimethoxyethaneSolventHCID 10340Sodium CarbonateSolvent

Conditions

Temperature
80 °C

Procedure

A mixture of 2-bromobenzonitrile (9.1 g, 50 mmol), 3-aminobenzeneboronic acid monohydrate (11.6 g, 75 mmol) and tetrakis(triphenylphosphine)palladium(0) (1.73 g, 1.5 mmol) in dimethoxyethane (50 ml) and 2M sodium carbonate solution (25 ml) was heated at 80° C. for 20 h. After cooling to ambient temperature the reaction was partitioned between ethyl acetate (400 ml) and water (400 ml). The organics were washed with brine (400 ml), dried over anhydrous sodium sulfate, filtered and concentrated in vacuo. Purification of the residue by flash chromatography on silica gel, eluting with isohexane on a gradient of ethyl acetate (0-25%) gave 3′-aminobiphenyl-2-carbonitrile as a colourless oil that solidified on standing to afford a white solid (9.5 g, 98%): δH (400 MHz, CDCl3) 3.79 (2H, br), 6.75 (1H, ddd, J 8, 3 and 1), 6.84 (1H, dd, J 3 and 3), 6.92 (1H, dd, J 8 and 3), 7.25 (1H, dd, J 8 and 8), 7.40 (1H, ddd, J 8, 8 and 1), 7.50 (1H, dd, J 8 and 1), 7.62 (1H, ddd, J 8, 8 and 1), 7.73 (1H, dd, J 8 and 1).

Workup

  1. temperatureAfter cooling to ambient temperature the reaction
  2. customwas partitioned between ethyl acetate (400 ml) and water (400 ml)
  3. washThe organics were washed with brine (400 ml)
  4. dry with materialdried over anhydrous sodium sulfate
  5. filtrationfiltered
  6. concentrationconcentrated in vacuo
  7. customPurification of the residue by flash chromatography on silica gel
  8. washeluting with isohexane on a gradient of ethyl acetate (0-25%)

Sources & evidence

ORD record
ord-a6b871c9d14a40e388f4410b6fd4eb07
Source dataset
uspto-grants-2005_07
Patent number
US06914063B2

Reaction notes

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