Lukáš Severa, Milan Ončák, Dr. Dušan Koval, Dr. Radek Pohl, Dr. David Šaman, Dr. Ivana Císařová, Dr. Paul E. Reyes-Gutiérrez, Dr. Petra Sázelová, Dr. Václav Kašička, Dr. Filip Teplý and Dr. Petr Slavíček A Chiral Dicationic Circulenoid: Photochemical Origin and Facile Thermal Conversion into a Helicene Congener Angewandte Chemie International Edition 51
Article first published online: 28 SEP 2012 | DOI: 10.1002/anie.201203562
Doubly positive: A circulene-like species has been transformed into its helical counterpart exclusively by the application of heat (see scheme). The synthesis of the chiral dicationic circulenoid is based on a key [6+6] photocycloaddition and requires only five steps and no chromatographic purification.
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