A Readily Accessible Class of Chiral Cp Ligands and their Application in Ru
<sup>II</sup>
‐Catalyzed Enantioselective Syntheses of Dihydrobenzoindoles
作者:Shou‐Guo Wang、Sung Hwan Park、Nicolai Cramer
DOI:10.1002/anie.201802244
日期:2018.5.4
Chiral cyclopentadienyl (Cpx) ligands have a large application potential in enantioselective transition‐metal catalysis. However, the development of concise and practical routes to such ligands remains in its infancy. We present a convenient and efficient two‐step synthesis of a novel class of chiral Cpx ligands with tunable steric properties that can be readily used for complexation, giving CpxRhI
手性环戊二烯(Cp x)配体在对映选择性过渡金属催化中具有巨大的应用潜力。但是,开发这种配体的简洁实用的方法仍处于起步阶段。我们提出了一种方便有效的两步合成具有可调空间特性的新型手性Cp x配体的方法,可以很容易地用于络合,得到Cp x Rh I,Cp x Ir I和Cp x Ru II复合体。后者在用炔烃对氮杂苯并降冰片二烯进行对映选择性环化中得到了证明,后者可提供高达98:2 er的二氢苯并吲哚,显着优于现有的由双萘基衍生的Cp x配体。
Synthesis of C7-Functionalized Indoles through an Aromaticity Destruction–Reconstruction Process
作者:Tingxuan Xu、Qiuqin He、Renhua Fan
DOI:10.1021/acs.orglett.2c00733
日期:2022.4.15
A process for the synthesis of C7-functionalized indoles using para-substituted 2-alkynylanilines as starting materials was reported. The process involves a dearomatization, an 1,2-addition by organic lithium or Grignard reagents, an aromatization-driven allylic rearrangement, and a cyclization. A variety of groups including alkyl, aryl, alkenyl, or alkynyl groups were selectively installed at the