3-Bromo-2-fluoropyridine → 4-(2-fluoropyridin-3-yl)-1-methyl-5,6-dihydropyridin-2(1H)-one
Reaction equation
Br[C:2]1[C:3]([F:8])=[N:4][CH:5]=[CH:6][CH:7]=1.[CH3:9][N:10]1[CH2:15][CH2:14][CH:13]=[CH:12][C:11]1=[O:16].C1(CNCC2CCCCC2)CCCCC1>CC(C)([P](C(C)(C)C)([Pd][P](C(C)(C)C)(C(C)(C)C)C(C)(C)C)C(C)(C)C)C.O1CCOCC1>[F:8][C:3]1[C:2]([C:13]2[CH2:14][CH2:15][N:10]([CH3:9])[C:11](=[O:16])[CH:12]=2)=[CH:7][CH:6]=[CH:5][N:4]=1Participants
6
Reactant 3
Product 1
Reagents, catalysts & solvents 2
Conditions
- Temperature
- 100 °C
Procedure
Into a sealed tube were placed 3-bromo-2-fluoropyridine (0.106 g, 0.602 mmol), 1-methyl-5,6-dihydropyridin-2(1H)-one (0.134 g, 1.205 mmol), bis(tri-tert-butylphosphine)palladium (0) (0.046 g, 0.090 mmol), N,N-dicyclohexylmethylamine (0.129 mL, 0.663 mmol), and 1,4-dioxane (0.5 mL). After the mixture was degassed for 5 min, the reaction was heated at 100° C. for 3 h. The cooled reaction was concentrated in vacuo, and the brown residue was directly purified via flash column chromatography (20% EtOAc/Hexanes to 100% EtOAc) to give 4-(2-fluoropyridin-3-yl)-1-methyl-5,6-dihydropyridin-2(1H)-one (0.0153 g, 12.32% yield) as a tan solid. [M+1]=207.1.
Workup
- customInto a sealed tube were placed
- customAfter the mixture was degassed for 5 min
- customThe cooled reaction
- concentrationwas concentrated in vacuo
- customthe brown residue was directly purified via flash column chromatography (20% EtOAc/Hexanes to 100% EtOAc)
Sources & evidence
- ORD record
- ord-9409957f8feb42e1b478426d3ad7438e
- Source dataset
- uspto-grants-2014_06
- Patent number
- US08759532B2
Reaction notes
Loading…