4.6 Article

Ruthenium-catalysed cyclisation reactions of 1,11-dien-6-ynes leading to biindenes

Journal

ORGANIC & BIOMOLECULAR CHEMISTRY
Volume 18, Issue 9, Pages 1760-1764

Publisher

ROYAL SOC CHEMISTRY
DOI: 10.1039/d0ob00179a

Keywords

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Funding

  1. JSPS, Japan [16K05783]
  2. Grants-in-Aid for Scientific Research [16K05783] Funding Source: KAKEN

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1,2-Bis(2-allylphenyl)ethynes undergo cycloisomerisation reactions in the presence of Cp*Ru(ii) catalysts to produce 2,2 '-dimethyl-3H,3 ' H-1,1 '-biindenes. On the other hand, tandem ring-closing metathesis of 1,2-bis(2-allylphenyl)ethynes using the Hoveyda-Grubbs 2nd generation catalyst led to the formation of 2,2 '-unsubstituted biindenes. Various symmetrical and unsymmetrical bicyclic dienes were prepared by these ruthenium-based cyclisation methods.

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