Potassium Cyanide → 1-Dimethylamino-4-hydroxyamino-piperidine-4-carbonitrile

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Reaction Conditions

Reaction Steps

12.4 g 1-Dimethylamino-piperidin-4-one oxime (from Step 1) is dissolved in 160 ml water. 49.3 g potassium dihydrogenphosphate is added. The resulting yellow suspension is cooled to 5° C., and a solution of 11.24 g potassium cyanide in 40 ml water is added. The mixture is stirred at room temperature for 2 days, then extracted with ethyl acetate, the organic layer dried over sodium sulfate, and the solvent evaporated, to give 7.8 g 1-Dimethylamino-4-hydroxyamino-piperidine-4-carbonitrile. 1H-NMR (CDCl3): 5.60 ppm (s, broad, 1H), 5.10 ppm (s, broad, 1H), 2.92 ppm (m, 2H), 2.61 ppm (m, 2H), 2.33 ppm (s, 6H), 2.10 ppm (m, 2H), 1.70 ppm (m, 2H).

Provenance & Evidence