Allylic 3-phenylthio-2-propen-1-yl ethers(3) underwent [2,3]-sigmatropic (Wittig-type) rearrangement by treatment of n-butyllithium in tetrahydrofuran (THF) at −40 ∼ −50°C to give the corresponding allylic alcohols (7). On the other hand, the allylicethers 3 were treated with potassium tert-but oxide in tert-butyl alcohol-N,N-dimethylformamide (DMF) at room temperature to give the corresponding allylic