Ammonium Hydroxide → [4-(4-fluorophenyl)-3-[4-(methylsulfonyl)phenyl]-5-(trifluoromethyl)-1H-pyrazol-1-yl]acetamide

Participants

Reaction Conditions

Reaction Steps

To a solution of [4-(4-fluorophenyl)-3-[4-(methylsulfonyl)phenyl]-5-(trifluoromethyl)-1H-pyrazol-1-yl]acetic acid (Example 10) (0.24 g, 0.54 mmol) in THF (6 mL) was added 0.10 g of 1,1'-carbonyldiimidazole at 25° C. under nitrogen. After gas evolution had ceased (approx. 30 minutes), 6 mL conc. ammonium hydroxide was added and the mixture stirred at 25° C. for 18 hours. The reaction mixture was diluted with water, extracted with two portions ethyl acetate and the organic layer washed successively with dilute aqueous HCl and brine, dried over MgSO4 and concentrated in vacuo. Recrystallization from chloroform/acetone gave [4-(4-fluorophenyl)-3-[4-(methylsulfonyl)phenyl]-5-(trifluoromethyl)-1H-pyrazol-1-yl]acetamide as a white crystalline solid (0.15 g, 34%). Elemental analysis for C19H15N3F4SO3Calc'd: C, 51.70, H, 3.42, N, 9.52. Found: C, 51.46, H, 3.35, N, 9.39.

Provenance & Evidence