Diisopropylcarbodiimide → 3-[4-(2-chloro-phenoxy)-piperidin-1-yl]-3-oxo-N-(3-phenyl-[1,2,4]thiadiazol-5-yl)-propionamide

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Reaction Steps

To a stirred solution of N-(3-phenyl-[1,2,4]thiadiazol-5-yl)-malonamic acid (0.07 g, 0.00027 mole) in THF (3 mL) was added, 4-(2-chloro-phenoxy)-piperidine hydrochloride (0.072 g, 0.00029 mol) followed by DIC (0.04 g, 0.00031 mole). The resulting mixture was heated to reflux for 4 hours then concentrated. The resulting residue was purified by column chromatography using neutral aluminium oxide (0.5% methanol in dichloromethane) to afford 0.045 g (37%) of 3-[4-(2-chloro-phenoxy)-piperidin-1-yl]-3-oxo-N-(3-phenyl-[1,2,4]thiadiazol-5-yl)-propionamide. LC-MS purity: 457.1 (M+1)+, 84.85% 1H NMR (CDCl3): δ 8.2 (s, 2H), 7.5 (m, 4H), 7.2 (m, 1H), 7.0 (d, 2H), 4.7 (s, 1H), 4.2 (d, 1H), 3.8 (m, 1H), 3.6 (m, 5H), 2.0 (dd, 4H), 2.6 (bs, 3H).

Provenance & Evidence