Isolation of a Zwitterionic Dienegold(III) Complex Intermediate in the Direct Conversion of Enyne-Amines to Cyclopentadienes
作者:Michele Melchionna、Martin Nieger、Juho Helaja
DOI:10.1002/chem.201000988
日期:——
Golden ring: A route for the direct AuCl3‐catalyzed conversion of an enyne–amine into cyclopentadiene is reported. The mechanism for the catalysis is proposed and supported by a resting‐state zwitterionic gold(III)‐cyclopentadiene structure (see figure).
Gold(III)-Catalyzed Enynamine–Cyclopentadiene Cycloisomerization with Chirality Transfer: An Experimental and Theoretical Study Indicating Involvement of Dual Au(III) Push–Pull Assisted <i>cis</i>–<i>trans</i> Isomerism
been established from chiral enynamines by achiral Au(III) catalysis. On the basis of experimental and theoretical data, the proposed mechanistic pathway from enynamines to Cps occurs via a Au(III) ene cis–trans isomerization step. Computational studies at DFT and NEVPT2 levels advocate that the cis–trans isomerization step proceeds via a dual Au(III) push–pull assisted intermediate with a low computed