Potassium Carbonate → 2-(4-Amino-3-methylphenoxy)-5-fluorobenzonitrile

HRID 1665995Notes

Reaction equation

HRID 1665995 reaction equation
F[C:2]1[CH:9]=[CH:8][C:7]([F:10])=[CH:6][C:3]=1[C:4]#[N:5].[NH2:11][C:12]1[CH:17]=[CH:16][C:15]([OH:18])=[CH:14][C:13]=1[CH3:19].C(=O)([O-])[O-].[K+].[K+]>CS(C)=O.O>[NH2:11][C:12]1[CH:17]=[CH:16][C:15]([O:18][C:2]2[CH:9]=[CH:8][C:7]([F:10])=[CH:6][C:3]=2[C:4]#[N:5])=[CH:14][C:13]=1[CH3:19]

Participants

6

Reactant 3

HCID 11430Potassium CarbonateHCID 178194-Amino-m-cresolHCID 1235582,5-Difluorobenzonitrile

Product 1

HCID 574187552-(4-Amino-3-methylphenoxy)-5-fluorobenzonitrileYield 99%

Reagents, catalysts & solvents 2

HCID 679Dimethyl SulfoxideSolventHCID 962WaterSolvent

Procedure

In a 3 L, 4-necked flask that had been evacuated and back-filled with argon, 2,5-difluorobenzonitrile (295.3 ml, 812.0 mmol) and 4-amino-3-methylphenol (100.0 g, 812.0 mmol) were dissolved in dry DMSO (2.75 M) with rapid stirring at room temperature. The solution was evacuated/backfilled with argon (3×). Potassium carbonate (185.2 g, 1340 mmol) (−325 mesh) was added. The reaction mixture was evacuated/backfilled with argon (3×) and warmed to 80° C. (internal probe) for 16 hours. TLC indicated complete conversion. The reaction mixture was cooled to room temperature and poured slowly into 2 L of ice water with rapid stirring. The residue in the round bottom flask was taken up in water repeatedly and poured into the ice water until a total volume of 3 L was achieved and all solids were in the ice water. The suspension was stirred rapidly for 2 hours as it came to room temperature. The brown solids were collected by filtration, washed with water (3 L), air dried, dried with latex dam, and dried under high vacuum at 40° C. for 44 hours to provide 194 g (99%) of the desired product as a tan solid. MS (APCI+) m/z 243 (M+1) was detected. 1H NMR (400 MHz, CDCl3) δ 7.38 (m, 1H), 7.18 (m, 1H), 6.65-6.85 (m, 5H), 3.60 (br, 2H), 2.17 (s, 3H).

Workup

  1. customIn a 3 L, 4-necked flask that had been evacuated
  2. temperaturewarmed to 80° C. (internal probe) for 16 hours
  3. temperatureThe reaction mixture was cooled to room temperature
  4. stirringThe suspension was stirred rapidly for 2 hours as it
  5. customcame to room temperature
  6. filtrationThe brown solids were collected by filtration
  7. washwashed with water (3 L), air
  8. customdried
  9. customdried with latex dam
  10. customdried under high vacuum at 40° C. for 44 hours

Sources & evidence

ORD record
ord-31bd66f5995441bca818751981f0354c
Source dataset
uspto-grants-2011_10
Patent number
US08039639B2

Reaction notes

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