反应详情

Lithium hydroxide hydrate (0.036 g; 0.85 mmole) dissolved in water (2.6 ml) was slowly added at room temperature to a solution of 2-hexyloxy-3-[4-(2-{4-methanesulfonyloxyphenyl}ethoxy)phenyl]propanoic acid methyl ester (described in Example 16) (0.37 g; 0.77 mmole) in tetrahydrofuran (3.5 ml). The reaction mixture was stirred at room temperature for 3.5 hours and then evaporated to remove tetrahydrofuran. The residue was acidified with potassium hydrogen sulfate (1 M) until pH<2 and then extracted with ethyl acetate. The organic phase was washed with brine and dried. Evaporation to remove the solvent gave 0.349 g (97.5%) of 2-hexyloxy-3-[4-(2-{4-methanesulfonyloxyphenyl}-ethoxy)phenyl]propanoic acid.

1. customevaporated
2. customto remove tetrahydrofuran
3. extractionextracted with ethyl acetate
4. washThe organic phase was washed with brine
5. customdried
6. customEvaporation
7. customto remove the solvent