Gold coordination during homogeneous alkyne and allene cyclisation catalysis: Coordination to substrates, to ancillary ligands and in intermediates

The ever-increasing role of homogeneous gold catalysis in organic synthesis and the consequent need to be able to rationally control the rate and outcome of such reactions has emphasised the importance of each successive metal - carbon coordination step. Concentrating on alkyne and allene cyclisatio...

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Bibliographic Details
Main Authors: Helgard Raubenheimer, Hubert Schmidbaur
Format: Article
Language:English
Published: Academy of Science of South Africa 2011-03-01
Series:South African Journal of Science
Subjects:
Online Access:https://www.sajs.co.za/article/view/10054
Description
Summary:The ever-increasing role of homogeneous gold catalysis in organic synthesis and the consequent need to be able to rationally control the rate and outcome of such reactions has emphasised the importance of each successive metal - carbon coordination step. Concentrating on alkyne and allene cyclisation and upon reaction mechanisms postulated on the basis of empirical and theoretical results, we have examined the coordination of gold fragments to triple bonds, the modification of gold(I) precatalysts to effect specific reaction pathways or enantioselectivity and the isolation of coordinated intermediates or model compounds thereof. Some of the recent advances that have been made in various laboratories are described in this compact review.
ISSN:1996-7489