6-Chloroquinoline-2-carbaldehydeoxime → (6-Chloroquinolin-2-yl)methanamine

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Reaction Steps

A solution of 0.78 g (3.79 mmol) of 6-chloroquinoline-2-carbaldehydeoxime in 30 mL of saturated ammoniacal methanol and 10 mL of tetrahydrofuran is hydrogenated with Raney nickel for 48 hours at 3 bar hydrogen pressure. The catalyst is filtered off and the solution is concentrated. The residue is chromatographed on silica gel, eluting with a gradient of dichloromethane/methanol (90:10) to dichloromethane/methanol/25% aqueous ammonia (90:10:1). The corresponding fractions are combined and concentrated by evaporation. Yield: 0.33 g (45% of theory); Rf value: 0.43 (silica gel; dichloromethane/methanol=9:1); C10H9ClN2 (192.65); mass spectrum: (M+H)+=193/195 (chlorine isotope).

Provenance & Evidence