Tetrahydrofuran → HCID 53956943, compound

Participants

Reaction Steps

THF (7.5 ml), 2,3-dichloro-5-trifluoromethylpyridine (0.81 g, 3.75 mmol) and 60% sodium hydride (0.12 g, 3.0 mmol) were added to 2-hydroxymethylphenyl 3-methylisoxazol-5-yl ketone O-methyloxime (0.62 g, 2.5 mmol) under ice-cooling, and the mixture was stirred at room temperature overnight. Water (100 ml) was added to the reaction mixture, and the mixture was extracted with ether (150 ml). The extract was dried over anhydrous magnesium sulfate and concentrated under reduced pressure. The residue was purified by silica gel chromatography (ethyl acetate/n-hexane) to give isomer A (0.29 g, yield: 27.2%) and isomer B (0.76 g, yield: 71.4%) of 2-(3-chloro-5-trifluoromethyl-2-pyridyloxymethyl)phenyl 3-methylisoxazol-5-yl ketone O-methyloxime.

Provenance & Evidence