Aniline → 2-[4-(4-Fluoro-phenyl)-3-(4-methanesulfonyl-phenyl)-5-trifluoromethyl-pyrazol-1-yl]-N-phenyl-acetamide

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Reaction Conditions

Reaction Steps

Aniline (0.07 g, 0.75 mmol) was added to a methylene chloride solution of trimethyl aluminum (0.38 mL, 0.75 mmol, 2.0M in hexanes) at 25° C. under nitrogen. After gas evolution had ceased (approx. 30 minutes), ethyl[4-(4-fluorophenyl)-3-[4-(methylsulfonyl)phenyl]-5-(trifluoromethyl)-1H-pyrazol-1-yl]acetate (Example 8) (0.25 g, 0.5 mmol) was added and the mixture stirred for 24 hours at 25° C. The reaction was quenched with dilute aqueous HCl and extracted with two portions ethyl acetate and the extracts washed with brine, dried over MgSO4 and concentrated in vacuo. Recrystallization from chloroform/acetone gave N-phenyl-[4-(4-fluorophenyl)-3-[4-(methylsulfonyl)phenyl]-5-(trifluoromethyl)-1H-pyrazol-1-yl]acetamide as a white crystalline solid (0.18 g, 68% yield). Elemental analysis for C25H19N3F4SO3Calc'd: C, 58.02, H, 3.70, N, 8.12, S, 6.20. Found: C, 57.48, H, 3.78, N, 8.03, S, 6.46.

Provenance & Evidence