Electrochemical [4+2] Annulation‐Rearrangement‐Aromatization of Styrenes: Synthesis of Naphthalene Derivatives
作者:Yueyue Ma、Jufeng Lv、Chengyu Liu、Xiantong Yao、Guoming Yan、Wei Yu、Jinxing Ye
DOI:10.1002/anie.201902315
日期:2019.5.13
We report the first electrochemical strategy to synthesize functionalized naphthalene derivatives through [4+2] annulation—rearrangement–aromatization from styrenes under mild conditions. The electrolysis does not require metals, oxidants and high valence substrates, indicating the atom and step‐economy ideals. The dehydrodimer produced through [4+2] cycloaddition of 4‐methoxy α‐methyl styrene is isolated
我们报告了第一种电化学策略,通过在温和的条件下通过[4 + 2]苯乙烯的重环-重排-芳构化来合成官能化的萘衍生物。电解不需要金属,氧化剂和高价底物,这表明了原子和阶跃经济的理想选择。分离出4-甲氧基α-甲基苯乙烯的[4 + 2]环加成反应产生的脱氢二聚体,并证明是随后氧化脱氢形成碳阳离子的关键中间体,该碳阳离子经过重排-芳构化得到最终产物。该反应代表了一步即可构建多取代萘嵌段的强大途径。