反应详情

A mixture of methyl 5-(4-fluorophenyl)-4-[4-(methylsulfonyl)phenyl]thiophene-2-acetate (2 g) and 4N sodium hydroxide solution (3.7 ml) in tetrahydrofuran (20 ml) as stirred at ambient temperature for 1 hour. The mixture was diluted with water and washed with toluene. The aqueous layer was acidified with hydrochloric acid and extracted with ethyl acetate. The extract was washed with water, dried and concentrated. The residue was recrystallized from a mixture of ethanol and water to give pale orange crystals of 5-(4-fluorophenyl)-4-[4-(methylsulfonyl)phenyl]thiophene-2-acetic acid (1.6 g).

1. washwashed with toluene
2. extractionextracted with ethyl acetate
3. washThe extract was washed with water
4. customdried
5. concentrationconcentrated
6. customThe residue was recrystallized from a mixture of ethanol and water