Hydrochloric Acid → HCID 178428990, compound

Participants

Reaction Steps

In 1,4-dioxane (1.4 mL) was dissolved 173 mg (0.553 mmol) of 4-[(4,6-dichloro-3-pyridazinyl)oxy]-3-methylphenyl acetate obtained in Example 630(3), 0.7 mL (2.1 mmol) of 3 mol/L sodium hydroxide solution and dimethylsulfoxide (2.8 mL) were added to the solution and the resulting mixture was stirred at room temperature overnight. To the reaction mixture was added 4 mol/L hydrochloric acid, and the mixture was extracted with ethyl acetate. The organic layers were combined, washed successively with water and brine. After drying over anhydrous magnesium sulfate, the solvent was removed. The obtained residue was purified by preparative thin-layer chromatography (developed by dichloromethane:methanol=36:1) to obtain 66.8 mg of 6-chloro-3-(4-hydroxy-2-methylphenoxy)-4-pyridazinol.

Provenance & Evidence