反应详情

0.65 g (1.3 mmol) of methyl 3-{3′-[(tert-butoxycarbonylmethylamino)methyl]biphenyl-4-yl}-2-ethoxypropionate is placed in 10 ml of tetrahydrofuran, 0.5 ml of methanol and 1.9 ml (1.9 mmol) of aqueous 1M lithium hydroxide solution. After stirring at room temperature for 2 hours, the reaction medium is diluted with ethyl acetate, acidified to pH 6 with aqueous 1N hydrochloric acid solution, extracted with ethyl acetate, dried over magnesium sulfate, filtered and concentrated. 0.54 g of 3-{3′-[(tert-butoxycarbonylmethylamino)methyl]biphenyl-4-yl}-2-ethoxypropionic acid is obtained in a yield of 92%.

1. extractionextracted with ethyl acetate
2. dry with materialdried over magnesium sulfate
3. filtrationfiltered
4. concentrationconcentrated