Phosphorus oxychloride → HCID 57447450, compound

Participants

Reaction Steps

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.).

Provenance & Evidence