2-Pyridin-3-yl-butyric acid ethyl ester → 2-(Pyridin-3-yl)butanoic acid

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A mixture of 2-Pyridin-3-yl-butyric acid ethyl ester (8 g, 0.04 mol) and a 20% aqueous solution of hydrochloric acid (50 mL) was heated to reflux for 3 hours. The solvent evaporated to dryness to yield the desired product (5 g, 0.02 mol, 50%), ESI-MS m/z calc. 165.1. found 166.5 (M+1)+ 1H NMR (DMSO-d6): δ 8.86 (s, 1H), 8.80 (d, 1H, J=5.6 Hz), 8.47 (d, 1H, J=8.0 Hz), 7.97 (dd, 1H, J=5.6, 8.0 Hz), 3.83 (t, 1H, J=8.0 Hz), 2.07-2.04 (m, 1H), 1.82-1.80 (m, 1H), 0.80 (t, 3H, J=7.6 Hz).

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