2,2,6,6-Tetramethyl-4-piperidone → 1,6-Bis(2,2,6,6-tetramethyl-4-piperidylamino)hexane

Participants

Reaction Steps

In a 5 liter autoclave were charged 981 g (6.32 mols) of 2,2,6,6-tetramethyl-4-piperidone, 350 g (3.01 mols) of hexamethylenediamine, 1500 g of methanol and 5.0 g of 5% platinum on carbon with keeping the temperature at 45°-55° C. The inside of the autoclave was pressurized to 40 bars with hydrogen and heated to 70°-80° C. to carry out hydrogenation. The hydrogenation was completed after 4-5 hours. The catalyst was removed by filtration at 70°-80° C. under 2-3 bars and 1070 g of N,N'-bis(2,2,6,6-tetramethyl-4-piperidyl)-1,6-hexanediamine was obtained by distillation. Yield: 90%.

Provenance & Evidence