Phosphorus oxychloride → HCID 57447450, compound
Reaction equation
[Cl:1][C:2]1[CH:7]=[CH:6][C:5]([C:8]2[C:13]([CH3:14])=[N:12][NH:11][C:10](=O)[C:9]=2[C:16]2[C:21]([C:22]([F:25])([F:24])[F:23])=[CH:20][CH:19]=[CH:18][N:17]=2)=[CH:4][CH:3]=1.P(Cl)(Cl)([Cl:28])=O>>[Cl:28][C:10]1[N:11]=[N:12][C:13]([CH3:14])=[C:8]([C:5]2[CH:6]=[CH:7][C:2]([Cl:1])=[CH:3][CH:4]=2)[C:9]=1[C:16]1[C:21]([C:22]([F:25])([F:24])[F:23])=[CH:20][CH:19]=[CH:18][N:17]=1Participants
Procedure
0.69 g of 5-(4-chlorophenyl)-6-methyl-4-(3-trifluoromethyl-2-pyridyl)-2H-pyridazin-3-one and 6.3 g of phosphorus oxychloride were mixed. The mixture was stirred for 2 hours under reflux with heating. The reaction mixture was allowed to cool to room temperature, then, concentrated under reduced pressure. To the resultant residue were added ethyl acetate and ice-cooled sodium bicarbonate water. The mixture was stirred for about 5 minutes at room temperature, then, liquid-separated. The organic layer was washed with brine, and dried over anhydrous magnesium sulfate, then, concentrated under reduced pressure. 0.50 g of the resultant residue was subjected to silica gel column chromatography, to obtain 0.11 g of 3-chloro-5-(4-chlorophenyl)-6-methyl-4-(3-trifluoromethyl-2-pyridyl)pyridazine (hereinafter, described as compound (7) of the present invention.).
Workup
- temperatureunder reflux
- temperaturewith heating
- concentrationconcentrated under reduced pressure
- additionTo the resultant residue were added ethyl acetate and ice-
- temperaturecooled sodium bicarbonate water
- stirringThe mixture was stirred for about 5 minutes at room temperature
- customliquid-separated
- washThe organic layer was washed with brine
- dry with materialdried over anhydrous magnesium sulfate
- concentrationconcentrated under reduced pressure
Sources & evidence
- ORD record
- ord-6b629c9c22e743a38c2b6cae37573e52
- Source dataset
- uspto-grants-2012_09
- Patent number
- US08258136B2
Reaction notes
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