Intramolecular [4 + 2] Cycloaddition Reactions of Diarylacetylenes: Synthesis of Benzo[b]fluorene Derivatives via Cyclic Allenes

Organic Letters

Volumn 2, Issue 11, 2000, Pages 1497-1500

  Rodríguez, David ^a   Navarro, Armando ^a   Castedo, Luis ^a   Domínguez, Domingo ^a   Saá, Carlos ^a  

^a UNIVERSITY OF SANTIAGO DE COMPOSTELA   (Spain)

Author keywords

[No Author keywords available]

Indexed keywords

EID: 0000402121     PISSN: 15237060     EISSN: None     Source Type: Journal    
DOI: 10.1021/ol991391t     Document Type: Article

References (34)

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19. See Supporting Information for experimental details.
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29. The combination of these two factors was inferred using MCSCF and B3LYP calculations for the models (Z)-4-heptene-1,6-diyn-3-one and (Z)-3-heptene-1,6-diyne. Results to be published elsewhere.
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32. Results to be published elsewhere.
33. This hypothesis had been suggested previously by Danheiser et al. See ref 5a.
34. Increased yield in the presence of a proton source (ArOH) has been observed previously in intramolecular [4 + 2] cycloadditions. See ref 5a.