In this thesis, an improved method for the preparation of dihydrobenzofurans was described. The starting materials, p-vinylphenols was prepared from the corresponding p-hydroxybenzaldehydes via crossed aldol condensation or Wittig reaction in good yields. The p-vinylphenols were then treated with respectively cerium(Ⅳ) ammomium nitrate to undergo oxidative coupling to give dihydrobenzofurans in few minutes, and in moderated yields.