Tetrahydrofuran → HCID 58580717, compound

Participants

Reaction Steps

(2S)-1-{(2R)-2-{[Tert-butyl(dimethyl)silyl]oxy}-3-[(1R)-1-(2-ethenylphenyl)ethoxy]propyl}-2-(3-fluoro-4-methylbenzyl)pyrrolidine (1.20 g, 2.35 mmol), which had been obtained in Example 180 (180c), was dissolved in tetrahydrofuran (20 mL) and added with a 0.5 M solution of 9-borabicyclo[3,3,1]nonane in tetrahydrofuran (5.6 mL, 2.82 mmol). After raising the temperature to room temperature, the mixture was stirred for 16 hours. Separately, the reaction solution was added dropwise in small portions to a solution in which sodium perborate hydrate (1.40 g, 14 mmol) was dissolved in water (20 mL), and the resulting mixture was stirred at room temperature for 2 hours. The reaction solution was extracted with ethyl acetate. The organic layer was washed with saturated brine and dried over anhydrous magnesium sulfate. The solvent was distilled off under reduced pressure. The residue was purified by basic silica gel chromatography (n-hexane/ethyl acetate=3/1) to give the title compound as a colorless oily substance (1.05 g, yield 84%).

Provenance & Evidence