Iron‐Catalyzed Regioselective Hydroaryloxylation of CC Triple Bonds: An Efficient Synthesis of 2<i>H</i>‐1‐Benzopyran Derivatives

Abstract An efficient, regioselective, iron‐catalyzed intramolecular hydroaryloxylation of 2‐propargylphenols or naphthols is reported. The reactions proceed through an endo‐dig cyclization to afford benzopyran or naphthopyran derivatives in good to high yields using iron(III) chloride as the catalyst with the assistance of aniline in dimethylformamide (DMF).