Potassium Carbonate → 1-(2-methyl-4-nitrophenyl)-4-(trifluoromethyl)-1H-imidazole

HRID 1892635Notes

Reaction equation

[F:1][C:2]([F:9])([F:8])[C:3]1[N:4]=[CH:5][NH:6][CH:7]=1.F[C:11]1[CH:16]=[CH:15][C:14]([N+:17]([O-:19])=[O:18])=[CH:13][C:12]=1[CH3:20].C(=O)([O-])[O-].[K+].[K+]>C(#N)C.O.[Cl-].[NH4+]>[CH3:20][C:12]1[CH:13]=[C:14]([N+:17]([O-:19])=[O:18])[CH:15]=[CH:16][C:11]=1[N:6]1[CH:7]=[C:3]([C:2]([F:9])([F:8])[F:1])[N:4]=[CH:5]1

Participants

Conditions

Temperature: 85 °C

Procedure

A mixture of 4-(trifluoromethyl)-1H-imidazole (198 mg, 1.46 mmol), 1-fluoro-2-methyl-4-nitrobenzene (216 mg, 1.53 mmol) and potassium carbonate (402 mg, 2.91 mmol) in acetonitrile (1.5 mL) was heated to 85° C. for 24 hours. The mixture was diluted with water and saturated ammonium chloride and was extracted with ethyl acetate twice. The combined organic layers were dried over sodium sulfate, filtered and concentrated. Purification by column chromatography (0-50% ethyl acetate in heptane), gave 1-(2-methyl-4-nitrophenyl)-4-(trifluoromethyl)-1H-imidazole. 1H NMR (500 MHz, CDCl3, δ): 8.30 (d, J=2.44 Hz, 1H), 8.21-8.25 (m, 1H), 7.70 (s, 1H), 7.45-7.49 (m, 2H), 2.38 (s, 3H).

Workup

extractionwas extracted with ethyl acetate twice
dry with materialThe combined organic layers were dried over sodium sulfate
filtrationfiltered
concentrationconcentrated
customPurification by column chromatography (0-50% ethyl acetate in heptane)

Sources & evidence

ORD record: ord-f5f3baf1dfe84522bb1c89311fd82cde
Source dataset: uspto-grants-2013_08
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08507533B2

Reaction notes

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