反应详情

To a solution of 0.526 g (0.0009 mol) of 4-[4-acetyl-3-[2-[2-(4-acetyl-3-hydroxy-2-propylphenoxy)ethoxy]ethoxy]-2-propylphenoxy]butanoic acid ethyl ester in 23 ml of methanol was added 23 ml (0.023 mol) of 1N sodium hydroxide. The mixture was stirred at 25° for 6 hours and the methanol was removed in vacuo. The aqueous solution was acidified to pH 3, the precipitate was dissolved in ethyl acetate and washed with sodium chloride solution. The oil obtained on concentration of the ethyl acetate was purified by column chromatography, eluting with 50% ethyl acetate-hexane and ethyl acetate to yield 0.4 g (80% yield) of 4-[4-acetyl-3-[2-[2-(4-acetyl-3-hydroxy-2-propylphenoxy)ethoxy]ethoxy]-2-propylphenoxy]butanoic acid as a pale yellow oil which solidified (melting point 52°-58°).

1. customthe methanol was removed in vacuo
2. dissolutionthe precipitate was dissolved in ethyl acetate
3. washwashed with sodium chloride solution
4. customThe oil obtained on concentration of the ethyl acetate
5. customwas purified by column chromatography
6. washeluting with 50% ethyl acetate-hexane and ethyl acetate