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Pure Appl. Chem. Vol. 74, No. 1, pp. 129-133 (2002)

Pure and Applied Chemistry

Vol. 74, Issue 1

Nickel-catalyzed cyclizations of alkynyl enones and alkynyl enals*

John Montgomery, Kande K. D. Amarasinghe, Sanjoy K. Chowdhury, Eric Oblinger, Jeongbeob Seo, and Alexey V. Savchenko

Department of Chemistry, Wayne State University, Detroit, MI 48202-3489, USA

Abstract: Substrates that possess an a,b-unsaturated carbonyl tethered to an alkyne have been utilized in a variety of nickel-catalyzed processes. Depending on ligand structure, reagent structure, reaction conditions, and workup conditions, several different monocyclic and bicyclic ring systems may be accessed from a common substrate. Evidence for a nickel metallacycle as a common intermediate is provided.

*Lecture presented at the 11th IUPAC International Symposium on Organometallic Chemistry Directed Towards Organic Synthesis (OMCOS-11), Taipei, Taiwan, 22-26 July 2001. Other presentations are presented in this issue, pp.1-186.



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