2,2,6,6-Tetramethyl-4-piperidone → HCID 131711454, compound

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Reaction Steps

31.0 g (0.21 mol) of triacetonamine and 33.4 g (0.20 mol) of diethyl aminomethylphosphonate are dissolved in 500 ml of ethanol, and the solution is hydrogenated, with the addition of 3 g of platinum-on-charcoal (containing 5% of platinum) and 3 drops of concentrated sulphuric acid, under a slight excess pressure until the absorption of hydrogen has ceased. The catalyst is filtered off and the filtrate is distilled. In this way is obtained diethyl (2,2,6,6-tetramethyl-4-piperidyl)-aminomethylphosphonate as a fine fraction which boils, under a pressure of 0.35 mm Hg, at a temperature of 130°.

Provenance & Evidence