Lithium hydroxide, monohydrate → 3-Bromo-5-[(dipropylamino)carbonyl]Benzoic Acid

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Reaction Steps

To a solution of methyl 3-bromo-5-[(dipropylamino)carbonyl]benzoate (XXI, PREPARATION 3, 1.4 g, 4.1 mmol) in THF/water/methanol (4/2/2, 8 mL) is added to lithium hydroxide monohydrate (0.17 g, 4.05 mmol). The mixture is stirred at 20 degrees −25 degrees C. for 1 hour and then solvent is removed under reduced pressure. The residue is dissolved in water (50 mL) and hydrochloric acid (1 N) is added to adjust the pH to about 3. The aqueous mixture is extracted with ethyl acetate and the organic phase is separated and dried over magnesium sulfate to give the title compound. Analytical calculated for C14H18BrNO3: C, 51.23;H, 5.53; N, 4.27; Br, 24.35. Found: C, 51.37;H, 5.56; N, 4.28.

Provenance & Evidence