Reaction equation
P(Cl)(Cl)(Cl)=O.[C:6]1([S:12]([CH2:15][CH2:16][CH2:17][C:18]2[N:22]([CH2:23][CH2:24][CH2:25][CH3:26])[N:21]=[C:20]([C:27]([NH2:29])=O)[CH:19]=2)(=[O:14])=[O:13])[CH:11]=[CH:10][CH:9]=[CH:8][CH:7]=1.[OH-].[NH4+]>>[C:6]1([S:12]([CH2:15][CH2:16][CH2:17][C:18]2[N:22]([CH2:23][CH2:24][CH2:25][CH3:26])[N:21]=[C:20]([C:27]#[N:29])[CH:19]=2)(=[O:13])=[O:14])[CH:7]=[CH:8][CH:9]=[CH:10][CH:11]=1Participants
4
Conditions
- Temperature
- 90 °C
Procedure
Phosphorus oxychloride (25 mL) was added to 5-(3-benzenesulfonylpropyl)-1-butyl-1H-pyrazole-3-carboxamide (10.4 g, 30.0 mmol) and heated to 90° C. for 2.5 hours. The reaction mixture was then cooled to ambient temperature and poured into ice water cooled by an ice bath. Additional ice was added to the reaction mixture and the pH of the mixture was adjusted to 8-9 by addition of 30% saturated aqueous ammonium hydroxide. The mixture was extracted with ethyl acetate and the combined organic layers were dried over magnesium sulfate, filtered, and concentrated under reduced pressure to afford 8.60 g of 5-(3-benzenesulfonylpropyl)-1-butyl-1H-pyrazole-3-carbonitrile.
Workup
- temperatureThe reaction mixture was then cooled to ambient temperature
- temperaturecooled by an ice bath
- additionAdditional ice was added to the reaction mixture
- extractionThe mixture was extracted with ethyl acetate
- dry with materialthe combined organic layers were dried over magnesium sulfate
- filtrationfiltered
- concentrationconcentrated under reduced pressure
Sources & evidence
- ORD record
- ord-d214c36ddab64c0a9eef407dd79fb50a
- Source dataset
- uspto-grants-2015_09
- Patent number
- US09145410B2
Linked notes
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