A mild and efficient method for one-step α-haloacetalization of acetophenones using 1,3-dihalo-5,5-dimethylhydantoin in ethylene glycol

R: H, p-Me, p-MeO, p-Br, p-Cl, p-F, m-Br, o-Cl, p-CF3, p-NO2, m-NO2, 3,4-Cl, 4′-Br-biphenyl.