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

HRID 1292235Notes

Reaction equation

[F:1][C:2]1[CH:7]=[CH:6][C:5]([C:8]2[C:9]([C:21]3[CH:26]=[CH:25][C:24]([S:27]([CH3:30])(=[O:29])=[O:28])=[CH:23][CH:22]=3)=[N:10][N:11]([CH2:17][C:18]([OH:20])=O)[C:12]=2[C:13]([F:16])([F:15])[F:14])=[CH:4][CH:3]=1.C(N1C=CN=C1)([N:33]1C=CN=C1)=O.[OH-].[NH4+]>C1COCC1.O>[F:1][C:2]1[CH:3]=[CH:4][C:5]([C:8]2[C:9]([C:21]3[CH:22]=[CH:23][C:24]([S:27]([CH3:30])(=[O:29])=[O:28])=[CH:25][CH:26]=3)=[N:10][N:11]([CH2:17][C:18]([NH2:33])=[O:20])[C:12]=2[C:13]([F:14])([F:16])[F:15])=[CH:6][CH:7]=1

Participants

Conditions

Temperature: 25 °C

Procedure

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.

Workup

additionwas added
extractionextracted with two portions ethyl acetate
washthe organic layer washed successively with dilute aqueous HCl and brine
dry with materialdried over MgSO4
concentrationconcentrated in vacuo
customRecrystallization from chloroform/acetone

Sources & evidence

ORD record: ord-3ed4e7ddfaeb4954a1055da2c258e19d
Source dataset: uspto-grants-1998_05
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US05756530

Reaction notes

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