Synthesis and characterization of new heptacyclic helicenes

Synthesis and characterization of new heptacyclic helicenes

[Display omitted] New helically chiral substituted heptacyclic systems have been prepared from a simple phenanthrene building block in good yields and purity, via a four-step sequence involving palladium-catalysed Heck coupling and oxidative photocyclization. X-ray crystal structure analysis indicat...

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Veröffentlicht in:Tetrahedron letters 2014-11, Vol.55 (45), p.6167-6170
Hauptverfasser: Guédouar, Habiba, Aloui, Faouzi, Moussa, Souad, Marrot, Jérôme, Ben Hassine, Béchir
Format: Artikel
Sprache:eng
Schlagworte:
Chirality
Crystal structure
Heck coupling
Helical structures
Joining
Optical properties
Phenanthrene
Photocyclization
Purity
Synthesis (chemistry)
Tetrahedrons
X-rays
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Zusammenfassung:[Display omitted] New helically chiral substituted heptacyclic systems have been prepared from a simple phenanthrene building block in good yields and purity, via a four-step sequence involving palladium-catalysed Heck coupling and oxidative photocyclization. X-ray crystal structure analysis indicated that the conformation resembled that of the unsubstituted heptahelicene. The optical properties of these heptacyclic helicenes were investigated and show interesting behaviour.
ISSN:0040-4039
1873-3581
DOI:10.1016/j.tetlet.2014.09.013