Water → 4-(6-((3-(2,6-Dichlorophenyl)-5-isopropylisoxazol-4-yl)methoxy)pyridazin-3-yloxy)benzoic acid

Participants

Reaction Steps

To a suspension of 4-{6-[3-(2,6-dichloro-phenyl)-5-isopropyl-isoxazol-4-ylmethoxy]-pyridazin-3-yloxy}-benzoic acid methyl ester from the previous step (0.083 g, 0.155 mmol) in ethanol (5 ml) was added sodium hydroxide (0.02 g, 0.5 mmol) and water (0.2 ml). The reaction mixture was stirred at room temperature for 20 h. The volatiles were removed in vacuo and the residue was diluted with water (3 ml) and the resulting solution was acidified to pH 5 by addition of 4N HCl. The formed precipitate was collected by filtration, washed with water (3×5 ml) and dried on air to provide 0.08 g (99%) of the title product.

Provenance & Evidence