Hydrochloric Acid → 3-(Azidomethyl)-2-phenylquinoline-4-carboxylic acid

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反応手順

To a solution of methyl 3-(azidomethyl)-2-phenylquinoline-4-carboxylate (2b) (1781 mg, 5.0 mmol) in methanol (50 mL) was added the solution of lithium hydroxide monohydrate (674 mg, 28.1 mmol) in 25 mL water. The reaction mixture was stirred at reflux for 4 h and the residue was acidified with 1 N HCl to pH 2. The volume of reaction mixture was reduced under reduced pressure. The resulting aqueous phase was extracted with ethyl acetate (150 mL). The organic phase was separated and washed with brine (20 ml) and dried over sodium sulfate and then concentrated in vacuo. Crystallization from ethyl acetate/hexane to afford the title compound (1200 mg, 66%) as an off white solid. MS APCI, m/z=305 (M+1). LCMS: 1.09 min.

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