Epichlorohydrin → 4-(2,3-Epoxypropoxy)-1-octyloxy-2,2,6,6-tetramethylpiperidine

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Reaction Conditions

Reaction Steps

100 g (2.5 mol) of sodium hydroxide are dissolved in 100 ml of water in a 750 ml sulfonation flask fitted with mechanical stirrer, thermometer, dropping funnel and condenser. 71.9 g (0.25 mol) of 1-octyloxy-2,2,6,6-tetramethyl-4-hydroxypiperidine and 16.1 g (0.05 mol) of tetrabutylammonium bromide are added at 20° C. The mixture is warmed to 30° C. with vigorous stirring. A solution of 277.5 g (3 mol) of epichlorohydrin and 71.9 g (0.25 mol) of 1-octyloxy-2,2,6,6-tetramethyl-4-hydroxypiperidine is then added dropwise at 35° C. over the course of 75 minutes. The reaction solution is stirred at room temperature for 16 hours and poured onto 1 kg of ice and 100 g of sodium bicarbonate. The organic phase is separated off. The water phase is extracted with ethyl acetate. The two organic phases are washed with sodium chloride-saturated water, dried over sodium sulfate and evaporated on a Rotavap.

Provenance & Evidence