Oxidation of halogen salts with m-chloroperbenzoic acid in the presence of 18-crown-6 and of suitable hydroxy or carboxy alkenes leads readily to high yield production of cyclic halogenoethers or halogenolactones. ... Cyclic halogenoethers and halogenolactones are of consider- able inherent interest and synthetic utility.1.2 We report a new route to these types of compounds, which is preparatively ... X = Br (91'/0) x = c1(55%) (75 '/o ) x = I(70%)
![5-iodo-2,2,4-trimethyl-3-oxabicyclo[2.2.2]octane结构式](https://image.chemsrc.com/caspic/160/94922-00-6.png)