1. A new reagent pair sodium percarbonateacetic anhydride for epoxidation of olefins
- Author
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Gao-Yang Xie, Yun-Zhi Lu, Guan-Zhong Sun, Lin-Xiao Xu, Fenggang Tao, and Shi-Ming Ma
- Subjects
Acetic anhydride ,chemistry.chemical_compound ,chemistry ,Reagent ,Sonication ,Sodium ,Organic chemistry ,chemistry.chemical_element ,General Chemistry ,Sodium percarbonate ,Sodium perborate - Abstract
A new convenient method for epoxidation of olefins by sodium percarbonate — acetic anhydride is reported. It is found that the epoxides in 60–80% yields can be obtained in 18–24 h without ultrasonication. However, higher yields (some nearly quantitative) can be reached only within 1–3 h under ultrasonication. A comparison between the ultrasonicated epoxidations by use of sodium percarbonate and sodium perborate is also made. The experimental results have revealed that ultrasonication plays a main role in accelerating the interaction of both sodium percarbonate and sodium perborate with acetic anhydride, but it does not alter the mechanism of these two epoxidations.
- Published
- 1989