Hydrochloric Acid → 2-(2-{4-[1-(4-fluoro-benzyl)-1H-indol-3-yl]-piperidin-1-yl}-ethoxy)-benzoic acid

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반응 단계

0.02 g (0.42 mmol) of a dispersion of 60% NaH in mineral oil were added to a solution of 0.06 g (0.15 mmol) of 2-{2-[4-(1H-indol-3-yl)-piperidin-1-yl]-ethoxy}-benzoic acid methyl ester prepared in step D in 1 mL of anhydrous DMF under nitrogen atmosphere. After stirring 30 minutes at room temperature 0.026 mL (0.21 mmol) of 4-fluoro-benzyl bromide were added and the mixture was stirred for 18 hours. After addition of 0.09 g (0.12 mmol) of 3-(3-mercapto-phenyl)-propanamido-methyl-polystyrene in 1 mL of DMF the mixture was stirred overnight at room temperature. 0.1 mL of 2N HCl were added to the reaction mixture and the crude-was filtered. The solvent was removed under reduced pressure and the crude mixture was purified using a 500 mg Varian C18 chromatography column affording 0.059 g (84% yield) of 2-(2-{4-[1-(4-fluoro-benzyl)-1H-indol-3-yl]-piperidin-1-yl}-ethoxy)-benzoic acid.

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