Iron-Catalyzed Regioselective Hydroaryloxylation of CC Triple Bonds: An Efficient Synthesis of 2<i>H</i>-1-Benzopyran Derivatives
作者:Xiaobing Xu、Jun Liu、Linfeng Liang、Hongfeng Li、Yanzhong Li
DOI:10.1002/adsc.200900483
日期:2009.11
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).