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Synlett 1992; 1992(1): 13-21
DOI: 10.1055/s-1992-21250
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Titanium Metallacycles as Intermediates in the Synthesis of Acyclic and Heterocyclic Compounds

Kenneth M. Doxsee* , John K. M. Mouser, Judah B. Farahi
  • *Department of Chemistry, University of Oregon, Eugene, Oregon 97403, USA
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Publication Date:
18 September 2002 (online)

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Sequential reactions of the titanocene methylidene complex, [Cp2Ti=CH2], with various unsaturated organic substrates lead to the facile preparation of a number of acyclic and heterocyclic compounds, including pyridine and pyrimidine derivatives, conjugated dienes, and ß-ketoenamines. These reactions are discussed within the context of pericyclic organometallic reactivity, with particular focus on [4 + 2] cycloaddition reactions of 1-metalla-1,3-dienes. 1. Introduction 2. Reactivity of Titana-2-cyclobutenes with Nitriles 3. Reactivity of Titana-2-cyclobutenes with Ketones and Aldehydes 4. 1-Aza-2-titana-1(4)-cyclobutenes as Reactive Intermediates 5. Applications to Main-Group Heterocyclic Chemistry

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