Dimethylformamide → 5-(pyridin-2-ylthio)-3-(1,3,5-trimethyl-1H-pyrazol-4-yloxy)picolinonitrile
Reaction equation
Br[C:2]1[CH:3]=[C:4]([O:10][C:11]2[C:12]([CH3:18])=[N:13][N:14]([CH3:17])[C:15]=2[CH3:16])[C:5]([C:8]#[N:9])=[N:6][CH:7]=1.[N:19]1[CH:24]=[CH:23][CH:22]=[CH:21][C:20]=1[SH:25].CN(C=O)C.[H-].[Na+]>O>[N:19]1[CH:24]=[CH:23][CH:22]=[CH:21][C:20]=1[S:25][C:2]1[CH:3]=[C:4]([O:10][C:11]2[C:12]([CH3:18])=[N:13][N:14]([CH3:17])[C:15]=2[CH3:16])[C:5]([C:8]#[N:9])=[N:6][CH:7]=1Participants
6
Reactant 4
Product 1
Reagents, catalysts & solvents 1
Conditions
- Temperature
- 0 °C
Procedure
A flask was charged with 5-bromo-3-(1,3,5-trimethyl-1H-pyrazol-4-yloxy)picolinonitrile (27.77 g, 90.41 mmol), pyridine-2-thiol (10.55 g, 94.93 mmol), and DMF (300 mL). The reaction was cooled to 0° C. and 95% sodium hydride (2.741 g, 108.5 mmol) was added portionwise. The reaction was stirred at ambient temperature overnight, then carefully diluted with water (2 L) and extracted with ethyl acetate. The organic layer was washed with brine (4×500 mL), dried over sodium sulfate and concentrated to afford 5-(pyridin-2-ylthio)-3-(1,3,5-trimethyl-1H-pyrazol-4-yloxy)picolinonitrile (29.50 g, 87.43 mmol, 96.70% yield) as yellow solid.
Workup
- extractionextracted with ethyl acetate
- washThe organic layer was washed with brine (4×500 mL)
- dry with materialdried over sodium sulfate
- concentrationconcentrated
Sources & evidence
- ORD record
- ord-70414b74cd2641258bb2e26979c68849
- Source dataset
- uspto-grants-2014_10
- Patent number
- US08853409B2
Reaction notes
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