Co-complexes Derived from Alkene Insertion to Alkyne-dicobaltpentacarbonyl Complexes: Insight into the Regioselectivity of Pauson-khand Reactions of Cyclopropenes

Overview

Journal J Org Chem

Publisher American Chemical Society

Specialty Chemistry

Date 2008 Jul 22

PMID 18637694

Citations 1

Authors

Mahesh K Pallerla

Glenn P A Yap

Joseph M Fox

Affiliations

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Abstract

Described are the X-ray crystallographic and spectral properties of Co-complexes that were isolated from two Pauson-Khand reactions of chiral cyclopropenes. These are the first examples of isolated Co-complexes derived from the putative alkene-insertion intermediates of Pauson-Khand reactions. The binuclear Co-complexes are coordinated to mu-bonded, five-carbon "flyover" carbene ligands. It is proposed that the complexes result from cyclopropane fragmentation subsequent to alkene insertion. The observation of these metal complexes provides a rationale for the origin of regioselectivity in Pauson-Khand reactions of cyclopropenes.

Citing Articles

Functionalized Cyclopropenes and Methylenecyclopropenes from Dianions of 3-Hydroxymethylcyclopropenes.

Hassink M, Fox J Synthesis (Stuttg). 2012; 44(18):2843-2850.

PMID: 23125466 PMC: 3486929. DOI: 10.1055/s-0031-1290822.

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