Hydrochloric Acid → 4-Methyl-2-[3-(1-methyl-piperidin-4-yl)-propylamino]-pyrimidine-5-carbonitrile

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Reaction Steps

A flask containing sodium ethoxide (0.64 mL of a 21 wt % solution in ethanol, 1.7 mmol) and N-[3-(1-methyl-piperidin-4-yl)-propyl]-guanidine.HCl (200 mg, 0.85 mmol) in ethanol (2.45 mL) was aged for 15 minutes at room temperature. To the resultant mixture was then added 2-acetyl-3-ethoxy-acrylonitrile (148 mg, 1.06 mmol). The resultant mixture was warmed to 80° C. for 5 h, then cooled to room temperature and concentrated. The resultant residue was partitioned between 1 N NaOH and dichloromethane. After separation of the layers, the aqueous layer was extracted with additional dichloromethane (2×). The combined organic layers were dried over MgSO4, filtered, and concentrated to yield the title compound as a solid.

Provenance & Evidence