Phosphorus oxychloride → HCID 57950233, compound

Participants

Reaction Conditions

Reaction Steps

0.14 g of 5-(4-chlorophenyl)-4-(3,5-difluoro-2-pyridyl)-6-methyl-2H-py ridazin-3-one and 5 g of phosphorus oxychloride were mixed. The mixture was stirred for 1.5 hours on an oil bath of 120° C. The reaction mixture was allowed to cool to room temperature, the, 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. 0.14 g of the resultant residue was subjected to silica gel column chromatography, to obtain 0.08 g of 3-chloro-5-(4-chlorophenyl)-4-(3,5-difluoro-2-pyridyl)-6-met hylpyridazine (hereinafter, described as compound (15) of the present invention.).

Provenance & Evidence