Enantioselective Friedel-Crafts Alkylation of<i>N</i>-Methylindoles with Nitroalkenes Catalyzed by Chiral Bifunctional Abietic-Acid-Derived Thiourea-Zn<sup>II</sup>Complexes
作者:Wei-gen Huang、Heng-shan Wang、Guo-bao Huang、Yong-ming Wu、Ying-ming Pan
DOI:10.1002/ejoc.201200584
日期:2012.10
The catalytic asymmetric Friedel–Crafts alkylation of N-methylindoles with nitroalkenes catalyzed by bifunctional abietic-acid-derived thiourea-ZnII complexes was investigated. Various types of the nitroalkylated indoles were synthesized under mild conditions and obtained with excellent yields (up to 99 %) and good enantioselectivities (up to 86 % ee). These chiral thiourea catalysts are easily available
研究了由双功能枞酸衍生的硫脲-ZnII 配合物催化的 N-甲基吲哚与硝基烯烃的催化不对称 Friedel-Crafts 烷基化反应。在温和的条件下合成了各种类型的硝基烷基化吲哚,并以优异的产率(高达 99%)和良好的对映选择性(高达 86% ee)获得。这些手性硫脲催化剂很容易从商品枞酸中获得。