Phosphorus oxychloride → HCID 57950224, compound

Participants

Reaction Steps

0.64 g of 5-(4-chlorophenyl)-4-(3-chloro-2-pyridyl)-6-methyl-2H-pyrida zin-3-one and 15 g of phosphorus oxychloride were mixed. The mixture was stirred for 6 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. 0.67 g of the resultant residue was subjected to silica gel column chromatography, to obtain 0.50 g of 3-chloro-5-(4-chlorophenyl)-4-(3-chloro-2-pyridyl)-6-methylpyridazine (hereinafter, described as compound (5) of the present invention.).

Provenance & Evidence