Journal
CHEMICAL COMMUNICATIONS
Volume 53, Issue 84, Pages 11540-11543Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7cc06798d
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- Agence Nationale de la Recherche [13-JS07-0009-01]
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Saddle- and propeller-shaped macrocycles are obtained by fourfold Perkin condensations in transient high dilution of 4,40-bis(phenylglyoxylic acid) with either 4,40-bis(phenylacetic acid) or p-phenylenediacetic acid, followed by four-fold oxidative photocyclizations. In the saddle-shaped tetraphenanthrylene, the angle between opposite phenanthrene planes is close to the value of 908 of an ideal saddle. In the two helicene fragments of the propeller-shaped double [5] helicene, the geometry of unsubstituted [5] helicene is preserved without major macrocycle-induced distortions.
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