Pyridine → 1-(2,4-Dichlorophenyl)-propan-2-one oxime

A solution of 1-(2,4-dichlorophenyl)-propan-2-one (3.46 g, 16.7 mmole) in methanol (40 ml) was treated with hydroxylamine hydrochloride (1.40 g, 20.6 mmol) followed by pyridine (1.7 ml, 20.6 mmol). The resulting mixture was stirred at ambient temperature over night for 16 hours. The reaction mixture was poured onto water (200 ml). The solid product was collected by filtration, washed with water and dried (40° C., 100 mbar). 3.63 g (100% of theory) of 1-(2,4-dichlorophenyl)-propan-2-one oxime was obtained in form of a white solid (m.p. 120-124° C.).