Document Type

Article

Publication Date

6-2012

Publication Title

Synlett

Volume

23

Issue

9

First Page

1271

Last Page

1282

DOI

10.1055/s-0031-1290486

Keywords

carbocation, alkyne complexes, transition-metal, Umpolung, ring closure

Abstract

This Account describes our work on highly electrophilic γ-carbonyl cations featuring propargyldicobalt cations, cycloheptynedicobalt complexes, and the interconnection between the two systems.
1 Introduction
2 γ-Carbonyl Cations via Iron Allyl Cations
3 γ-Carbonyl Cations via Propargyldicobalt Cations
3.1 Synthesis of Velloziolide
3.2 Synthesis of Microstegiol
4 Synthesis of Cycloheptynedicobalt Complexes
4.1 Synthesis via γ-Carbonyl Cations
4.2 Cycloheptynedicobalt Complexes via [4+3] Cycloaddition Reactions
4.3 Cycloheptynedicobalt Complexes via Ring-Closing Meta­thesis
4.4 Cycloaddition Reactions on Cycloheptynedicobalt Complexes
4.5 Cycloheptynedicobalt Complexes via Intramolecular ­Nicholas Reactions
5 Dehydrotropylium Ion Co2(CO)6 Complex
6 Final Comments

Funding Reference Number

NSERC

Comments

First published in Synlett, copyright © Georg Thieme Verlag, an imprint of Thieme Publishing. To access the final version, see DOI: 10.1055/s-0031-1290486 at https://www.thieme-connect.com/products/ejournals/html/10.1055/s-0031-1290486.

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