Methylenepyran unsaturated Fischer carbene complexes from γ-methylpyrylium salts and alkynylcarbenes. Evolution to spiro-pyran-cyclopentenone compounds - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Tetrahedron Letters Année : 2010

Methylenepyran unsaturated Fischer carbene complexes from γ-methylpyrylium salts and alkynylcarbenes. Evolution to spiro-pyran-cyclopentenone compounds

Résumé

Push-pull methylenepyran compounds 3 containing ferrocenyl or aryl groups are synthesized from reaction of condensation between γ-methyl-pyrylium salts 1 as precursors of γ-methylenepyrans and alkynylcarbene complexes 2 as Michaël-type acceptors. The new carbenes 3 evolve in CH2Cl2 solution at room temperature to provide spiro-fused-pyran-cyclopentenenone 4 and polysubstituted cyclopentenones 5.

Dates et versions

hal-00917185 , version 1 (11-12-2013)

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Fatou Ba, Pascal Le Poul, Françoise Robin-Le Guen, Nolwenn Cabon, Bertrand Caro. Methylenepyran unsaturated Fischer carbene complexes from γ-methylpyrylium salts and alkynylcarbenes. Evolution to spiro-pyran-cyclopentenone compounds. Tetrahedron Letters, 2010, 51 (4), pp.605-608. ⟨10.1016/j.tetlet.2009.11.072⟩. ⟨hal-00917185⟩
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