反应详情

20 Parts of 4-(3',5'-dimethyl-4'-hydroxyphenyl)-2,2,6,6-tetramethylpiperidine were dissolved in 1000 parts of sodium dried xylene and heated to reflux whilst stirred. 6.3 Parts of octanoyl chloride dissolved in a small amount of xylene were added to the refluxing solution dropwise. The solution was heated at reflux overnight, allowed to cool and filtered. The filtrate was evaporated to low bulk, dissolved in ether and washed with 2% aqueous sodium hydroxide and water. The organic phase was dried over magnesium sulphate and evaporated under reduced pressure. The residue was distilled under reduced pressure to yield 10.3 parts of the desired product having boiling point 175°-178°/0.05 mm and the following elemental analysis

1. temperatureheated
2. temperatureto reflux whilst
3. additionwere added to the refluxing solution dropwise
4. temperatureThe solution was heated
5. temperatureat reflux overnight
6. temperatureto cool
7. filtrationfiltered
8. customThe filtrate was evaporated to low bulk
9. dissolutiondissolved in ether
10. washwashed with 2% aqueous sodium hydroxide and water
11. dry with materialThe organic phase was dried over magnesium sulphate
12. customevaporated under reduced pressure
13. distillationThe residue was distilled under reduced pressure