Hydrochloric Acid → 2-(Piperidin-1-yl)acetic acid hydrochloride

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Ethyl 1-piperidineacetate (1.26 g, 7.4 mmol) was added to 3M hydrochloric acid solution (12 ml), which was then refluxed for 2 hours, stirred for 1 day at a room temperature, then concentrated under a reduced pressure. The resulting residue was dissolved in methanol and reconcentrated. The resulting solid was suspended in ethyl ether, filtered and dried under a reduced pressure to give 0.87 g of the titled compound. (Yield 65.3%). NMR(D2O): 1.0(m, 2H), 1.4(m, 4H), 2.5(m, 2H), 3.1(m, 2H), 3.5(s, 2H).

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