反应详情

To a solution of 7-(4-fluorophenyl)-7-(3-formyl-6-hydroxy-2,4,5-trimethylphenyl)heptanoic acid (1.8 g) in tetrahydrofuran (30 ml) was added sodium borohydride (176 mg) at 0° C. and the mixture was stirred at room temperature for 2 hours. Acetone was added and the solvent was distilled off under reduced pressure. Water and ethyl acetate were added and the organic layer was separated. The organic layer was washed with water and saturated saline and dried with anhydrous magnesium sulfate. The solvent was distilled off under reduced pressure to obtain crystals. They were recrystallized from acetonitrile to obtain 7-(4-fluorophenyl)-7-(6-hydroxy-3-hydroxymethyl-2,4,5-trimethylphenyl)heptanoic acid (740 mg) (Compound 32). The physical properties and spectrum data thereof are shown in Tables 3 and 4.

1. distillationthe solvent was distilled off under reduced pressure
2. additionWater and ethyl acetate were added
3. customthe organic layer was separated
4. washThe organic layer was washed with water and saturated saline
5. dry with materialdried with anhydrous magnesium sulfate
6. distillationThe solvent was distilled off under reduced pressure
7. customto obtain crystals
8. customThey were recrystallized from acetonitrile