Selenosulfonation of allenes and subsequent rearrangement of the adducts: A facile synthetic route to β-arylsulfonyl-substituted allylic alcohols

$\text{Se}$-Phenyl areneselenosulfonates add readily to allenes in a highly regiospecific fashion (eq 3) to give $\text{5}$. Oxidation of the PhSe group in $\text{5}$ to PhSe(O) is followed by [2,3]-sigmatropic rearrangement to $\text{6}$ and hydrolysis of $\text{6}$ to the β-arylsulfonyl-substituted allylic alcohol $\text{7}$, thereby providing a simple, high-yield route to these interesting compounds.