Pyridine-2-carbonitrile → HCID 23568413, compound

Participants

Reaction Steps

To a stirred solution of 2-cyanopyridine (2.08 g, 20 mmol) and N-methylhydroxylamine hydrochloride (1.66 g, 20 mmol) in 1:1 water/ethanol (30 mL) was added sodium carbonate (1.04 g, 10 mmol) in small portions. LCMS analysis after 5 min indicated that the reaction was complete. To this was added diethyl acetylenedicarboxylate (3.2 mL, 20 mmol) and the reaction mixture stirred for additional 20 min at room temperature. LCMS analysis of the resulting dark-green reaction showed that the reaction was complete. The reaction mixture was taken up into ethyl acetate (200 mL) and washed successively with water (2×25 mL) and brine (25 mL), and the organic layer dried (Na2SO4), filtered and concentrated to give brown oil which was passed through a plug of silica gel (1:1 hexanes/ethyl acetate). The filtrate was concentrated to give the title compound as a yellow oil (6.87 g). LCMS calcd for C15H20N3O5 (M+H): 322.14; found: 322.08.

Provenance & Evidence