反应详情

To a solution of Ethyl 4-[5-(4-n-pentyloxyphenyl)-isoxazol-3-yl]benzoate (6.33 g) in ethanol (60 ml) and tetrahydrofuran (90 ml) was added 2N sodium hydroxide aqueous solution (12.5 ml) at 80° C. The mixture was refluxed for 1 hour and poured into ice-water. The suspension was adjusted to pH 2.0 with 1N HCl. The precipitate was collected by filtration, washed with water and dried to give 4-[5-(4-n-pentyloxyphenyl)isoxazol-3-yl]benzoic acid (5.80 g).

1. temperatureThe mixture was refluxed for 1 hour
2. filtrationThe precipitate was collected by filtration
3. washwashed with water
4. customdried