Ammonium Hydroxide → 2,5-dimethyl-1-(2-trifluoromethyl-phenyl)-1H-pyrrole-3-carboxamide
Reaction equation
[OH-].[NH4+:2].[CH3:3][C:4]1[N:5]([C:13]2[CH:18]=[CH:17][CH:16]=[CH:15][C:14]=2[C:19]([F:22])([F:21])[F:20])[C:6]([CH3:12])=[CH:7][C:8]=1[C:9](Cl)=[O:10]>C1COCC1>[CH3:3][C:4]1[N:5]([C:13]2[CH:18]=[CH:17][CH:16]=[CH:15][C:14]=2[C:19]([F:22])([F:21])[F:20])[C:6]([CH3:12])=[CH:7][C:8]=1[C:9]([NH2:2])=[O:10]Participants
Procedure
To conc ammonium hydroxide (28%, 9.8 mL, 70 mmol) at 0° C. was added cautiously a solution of 2,5-dimethyl-1-(2-trifluoromethyl-phenyl)-1H-pyrrole-3-carbonyl chloride (2.1 g, 7.0 mmol) in THF (10 mL). After 10 min the reaction mixture was removed from the ice-bath and allowed to stir at ambient temperature. After 1 h the mixture was added to satd NH4Cl (30 mL) and extracted with DCM (3×30 mL). The combined extracts were washed with water (2×50 mL) and brine (50 mL), dried (anhyd Na2SO4) and concentrated under reduced pressure to afford the title compound (1.9 g, 96%) as a pale brown solid, which was used without purification in the next step. 1H-NMR (DMSO-d6) δ 7.98 (1H, d, J=7.8), 7.88 (1H, app t, J=7.8), 7.78 (1H, app t, J=7.8), 7.44 (1H, d, J=7.8), 7.17 (1H, br s), 6.66 (1H, br s), 6.35 (1H, s), 2.07 (3H, s), 1.81 (3H, s).
Workup
- customAfter 10 min the reaction mixture was removed from the ice-bath
- additionAfter 1 h the mixture was added to satd NH4Cl (30 mL)
- extractionextracted with DCM (3×30 mL)
- washThe combined extracts were washed with water (2×50 mL) and brine (50 mL)
- dry with materialdried (anhyd Na2SO4)
- concentrationconcentrated under reduced pressure
Sources & evidence
- ORD record
- ord-61504242b6d54c66b6e0c9ed40bad40b
- Source dataset
- uspto-grants-2013_02
- Patent number
- US08367667B2
Reaction notes
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