Imidazole → 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}propanoate

Participants

Reaction Steps

A solution of methyl 3-{2-[(1R)-1-({(2R)-3-[(2S)-2-(3-fluoro-4-methylbenzyl)pyrrolidin-1-yl]-2-hydroxypropyl}oxy)ethyl]phenyl}propanoate (596 mg, 1.30 mmol) which had been obtained in Example 2 (2a), in N,N-dimethyl formamide was added with imidazole (221 mg, 3.25 mmol) and tert-butyl(chloro)dimethylsilane (294 mg, 1.95 mmol), and stirred at room temperature. After stirring for 24 hours, the reaction solution was added with ethyl acetate and washed with saturated brine. The organic layer was dried over anhydrous magnesium sulfate. The solvent was distilled off under reduced pressure. The residue was purified by silica gel chromatography (n-hexane/ethyl acetate=85/15) to give the title compound as a pale yellow oily substance (676 mg, yield 91%).

Provenance & Evidence