Potassium Carbonate → 5-(4-chloro-1-methyl-5-(trifluoromethyl)-1H-pyrazol-3-yl)-4-fluoro-N-methyl-2-nitro-N-propylbenzenamine

HRID 1198409Notes

Reaction equation

[Cl:1][C:2]1[C:3]([C:12]2[CH:17]=[C:16](F)[C:15]([N+:19]([O-:21])=[O:20])=[CH:14][C:13]=2[F:22])=[N:4][N:5]([CH3:11])[C:6]=1[C:7]([F:10])([F:9])[F:8].C([O-])([O-])=O.[K+].[K+].[CH3:29][NH:30][CH2:31][CH2:32][CH3:33]>CN1CCCC1=O.O>[Cl:1][C:2]1[C:3]([C:12]2[C:13]([F:22])=[CH:14][C:15]([N+:19]([O-:21])=[O:20])=[C:16]([N:30]([CH3:29])[CH2:31][CH2:32][CH3:33])[CH:17]=2)=[N:4][N:5]([CH3:11])[C:6]=1[C:7]([F:10])([F:9])[F:8]

Participants

Conditions

Temperature: 35 °C

Procedure

At 25° C., 6.83 g (0.02 mole) 4-chloro-3-(2,5-difluoro-4-nitrophenyl)-1-methyl-5-(trifluoromethyl)-1H-pyrazole, 4.1 g (0.03 mole) K2CO3, 3.1 mL (0.03 mole) N-methyl-N-propylamine and a catalytic amount of CuF2 were slurried in 50 mL 1-methyl-2-pyrrolidinone. The reaction mixture was stirred at 35° C. for 2 hours. The mixture was cooled, diluted with 100 mL cold water, and extracted four times with ethyl acetate. The ethyl acetate extracts were washed with brine, dried over anhydrous MgSO4, and stripped in vacuo. The residue was purified chromatographically using 15% ethyl acetate in hexane as the eluent to give 6.8 g (86%) of 5-(4-chloro-1-methyl-5-(trifluoromethyl)-1H-pyrazol-3-yl)-4-fluoro-N-methyl-2-nitro-N-propylbenzeneamine as an orange oil, nD25 1.5534.

Workup

customAt 25° C.
temperatureThe mixture was cooled
extractionextracted four times with ethyl acetate
washThe ethyl acetate extracts were washed with brine
dry with materialdried over anhydrous MgSO4
customThe residue was purified chromatographically

Sources & evidence

ORD record: ord-6f637398e3f3431595481c2dddc5ccd6
Source dataset: uspto-grants-1994_01
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US05281571

Reaction notes

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