Reaction of cyclic sulfates of vic-diols with sodium hydroxide in THF-MeOH
produced the corresponding epoxides in excellent isolated yields at room te
mperature. Cyclic sulfates of trans-diols gave cis-epoxides, and cyclic sul
fates of cis-diols afforded trans-epoxides exclusively. Various cyclic sulf
ates of vic-diols can be converted into the epoxides under the conditions.