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温度

0 °C

A mixture of methyl 5-(4-fluorophenyl)-4-[4-(methylsulfonyl)phenyl]thiophene-2-acetate (1.8 g) and lithium aluminum hydride (0.63 g) in diethyl ether (30 ml) was stirred at 0° C. for 1 hour. Ethyl acetate and 10% sulfuric acid (50 ml) were added, and the resulting mixture was filtered. The organic layer was separated, washed with water, dried and concentrated under reduced pressure. The residual pale yellow oil (1.6 g) was purified by column chromatography on silica gel eluting with a mixture of toluene and ethyl acetate (2:1). The obtained oil (1.4 g) was pulverized with hexane to give a yellow powder of 2-(4-fluorophenyl)-5-(2-hydroxyethyl)-3-[4-(methylsulfonyl)phenyl]thiophene.

1. filtrationthe resulting mixture was filtered
2. customThe organic layer was separated
3. washwashed with water
4. customdried
5. concentrationconcentrated under reduced pressure
6. customThe residual pale yellow oil (1.6 g) was purified by column chromatography on silica gel eluting with a mixture of toluene and ethyl acetate (2:1)