反应详情

A solution of 17.10 parts of 1,2,2,6,6-pentamethylpiperidin-4-ol in 50 parts of dry benzene was stirred at 15°-20° C. whilst adding 6.0 parts of sebacoyl chloride dropwise over 15 minutes. The mixture was stirred for a further 12 hours at room temperature after which the 1,2,2,6,6-pentamethylpiperidin-4-ol hydrochloride formed during the reaction was filtered off. The benzene was removed by distillation under reduced pressure to give a yellow oil, which was distilled under reduced pressure to give bis-(1,2,2,6,6-pentamethyl-4-piperidinyl)sebacate as a colourless oil having a boiling point of 218°-20° C. at 0.4 mm of Hg and the following elemental analysis by weight:

1. customformed during the reaction
2. filtrationwas filtered off
3. customThe benzene was removed by distillation under reduced pressure
4. customto give a yellow oil, which
5. distillationwas distilled under reduced pressure