Hydrochloric Acid → 1-(2-(4-((Tert-butoxycarbonyl) (2,3-dihydro-1,4-benzodioxin-6-ylmethyl)amino)piperidin-1-yl)ethyl)-7-methoxy-2-oxo-1,2-dihydroquinoline-5-carboxylic acid

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Reaction Steps

466 mg of methyl 1-(2-(4-((tert-butoxycarbonyl)(2,3-dihydro-1,4-benzodioxin-6-ylmethyl)amino)piperidin-1-yl)ethyl)-7-methoxy-2-oxo-1,2-dihydroquinoline-5-carboxylate was dissolved in a mixture of 7 mL of methanol, 5 mL of tetrahydrofuran and 3 mL of water. To this mixture, 0.77 mL of 5 mol/L sodium hydroxide was added and stirred at room temperature for 1 hour. To the reaction mixture, hydrochloric acid was added to make acidic, the resulting solid was filtered and dissolved in chloroform. The chloroform solution was dried over anhydrous magnesium sulfate, and the solvent was removed under reduced pressure to give 553 mg of 1-(2-(4-((tert-butoxycarbonyl)(2,3-dihydro-1,4-benzodioxin-6-ylmethyl)amino)piperidin-1-yl)ethyl)-7-methoxy-2-oxo-1,2-dihydroquinoline-5-carboxylic acid.

Provenance & Evidence