Water → 2-Ethoxy-3-{4-[2-(4-hydroxyphenyl)ethoxy]-3-methylphenyl}propanoic acid

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Reaction Steps

Ethyl 2-ethoxy-3-[3-methyl-4-(2-{4-[(methylsulfonyl)oxy]phenyl}ethoxy)phenyl]propanoate (0.150 g; 0.330 mmole) was dissolved in THF. 5M sodium hydroxide (10 eqv) was added and the reaction mixture was stirred over night. Water was added and the THF evaporated. The remaining water was acidified with diluted hydrochloric acid and extracted with ethyl acetate. The organic phase was dried with magnesium sulfate. Purification of the crude product with preparative HPLC (Kromasil C8, 7 μm, 50×250 mm) using acetronitrile (20-100%) in ammonium acetate buffer (pH 7) as mobil phase gave 0.012 g (8% yield) of the desired product.

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