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Diastereoselective Synthesis of Cycloheptadienol Derivatives by a Formal [5+2] Carbocyclization Reaction of α,β,γ,δ-Diunsaturated (Methoxy)carbene Complexes with Methyl Ketone Lithium Enolates

✍ Scribed by José Barluenga; Jorge Alonso; Francisco J. Fañanás; Javier Borge; Santiago García-Granda

Publisher: John Wiley and Sons
Year: 2004
Tongue: English
Weight: 159 KB
Volume: 43
Category: Article
ISSN: 0044-8249
DOI: 10.1002/anie.200460547

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## Abstract β‐Substituted alkenylcarbene complexes react with methyl ketone lithium enolates to give different carbocyclization products depending on the structure of the lithium enolate, on the metal of the carbene complex, and on the reaction media. Thus, the reactions of aryl and alkyl methyl ke