β‐Diketiminate Zinc Complexes for the Hydroamination of Alkynes
作者:Mustafa Biyikal、Karolin Löhnwitz、Nils Meyer、Maximilian Dochnahl、Peter W. Roesky、Siegfried Blechert
DOI:10.1002/ejic.200900998
日期:2010.3
coordination of the OMe group to the zinc atom additionally takes place. All zinccomplexes were investigated as catalysts in the intramolecular hydroamination of nonactivated alkynes and show high catalytic activity in the presence of the cocatalyst [PhNMe 2 H][SO 3 CF 3 ]. The zinccomplex 1 shows the highest catalytic activity in most of the cyclization reactions. In this context, it was possible to isolate
Synthesis of Eight‐Membered Nitrogen Heterocycles via a Heterogeneous PtI
<sub>2</sub>
‐Catalyzed Cascade Cycloaddition Reaction of δ‐Aminoalkynes with Electron‐Deficient Alkynes
作者:Xinhong Li、Songmeng Wang、Hongkai Wang、Weilin Wang、Lingyan Liu、Weixing Chang、Jing Li
DOI:10.1002/adsc.201901644
日期:2020.4.8
cascade reaction of δ‐aminoalkynes was developed for the synthesis of various eight‐membered nitrogen heterocycles in excellent yields. The reaction proceeds via a hydration of δ‐aminoalkynes and subsequent intramolecular cyclization and intermolecular addition as well as ring‐expansion cascade reaction with another electron‐deficient alkynes. This method has the advantages of simple operation and mild