Pyridine → 4-Chlorobenzaldehyde O-(2-cyano-3-pyridylcarbonyl)oxime

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Reaction Conditions

Reaction Steps

Oxalyl chloride (2.8 g, 0.022 mole) is added dropwise to a suspension of potassium 2-cyanonicotinate (4.1 g, 0.022 mole) in dichloromethane (40 ml). The mixture is then heated under reflux for one hour. A solution of 4-chlorobenzaldehyde oxime (3.1 g, 0.02 mole) and pyridine (1.6 g, 0.02 mole) in dichloromethane (20 ml) is then added to the mixture, at 20° C. The mixture is then stirred for 2 hours at 20° C. The solvent is evaporated off and the residue treated with water (50 ml). The solid formed is filtered off and is washed with water and then with ethyl ether. A white solid 4.4 g, 77%) corresponding to the structure 2 is thus obtained (M.p.: 160° C.).

Provenance & Evidence