Summary: A series of phenoxathiins CL) were produced by the reaction between spiroepoxy- 2, 4-cyclohexadienones(5, and the pentachlorothiophenolate anion. The spiroepoxycyclohexadlenones k) may be regarded as polarity-reversed masked phenols in these reactions.
![5,7-ditert-butyl-1-oxaspiro[2.5]octa-5,7-dien-4-one Structure](https://image.chemsrc.com/caspic/220/39117-89-0.png)