Sugar-derived hydroperoxides have been employed for DBU-promoted enantiosel
ective epoxidation reactions. Optimisation studies are reported using 2-(5-
cyclohexylpentadienamido)-1,4-benzoquinone(maximum ee = 67%); the resulting
epoxide is an important synthetic precursor for the antibiotic (-)-Alisamy
cin. The procedure has also been applied to a range of 2-substituted naphth
oquinones (maximum ee = 82%).