The double asymmetric Katsuki–Sharplessepoxidation of a conjugated diallyl alcohol affords excellent enantioselectivity (>97 % ee), the product being isolated as the stable p-nitrobenzoate 5a or tosylate 5b. The optical purities of the chiral epoxides were determined by HPLC on chiral columns, while the molecular structures of compounds 5a and 7 and the absolute configuration of mono-epoxide 12 were