反应详情

A solution of methyl 3-{2-[(1R)-1-({(2R)-2-{[tert-butyl(dimethyl)silyl]oxy}-3-[(2S)-2-(3-fluoro-4-methylbenzyl)pyrrolidin-1-yl]propyl}oxy)ethyl]phenyl}-2,2-dimethylpropanoate (308 mg, 0.51 mmol), which had been obtained in Example 179 (179c), in THF (3.1 mL) was added with 1M solution of tetrabutylammonium fluoride in tetrahydrofuran (0.72 mL, 0.72 mmol), and stirred at room temperature. After stirring for 2 hours, a 1M solution of tetrabutylammonium fluoride in tetrahydrofuran (1.5 mL, 1.50 mmol) was added and further stirred for 48 hours. Upon the completion of the reaction, water (5 mL) was added and the mixture was extracted with ethyl acetate. The solvent was removed under reduced pressure. The residue was purified silica gel chromatography (n-hexane/ethyl acetate=3/7) to give the title compound as a pale yellow oily substance (206 mg, yield 83%).

1. stirringAfter stirring for 2 hours
2. stirringfurther stirred for 48 hours
3. additionwas added
4. extractionthe mixture was extracted with ethyl acetate
5. customThe solvent was removed under reduced pressure
6. customThe residue was purified silica gel chromatography (n-hexane/ethyl acetate=3/7)