@Article{AngewChemIntlEd_52_1796, author = {F. Torricelli and J. Bosson and C. Besnard and M. Chekini and T. B{\"u}rgi and J. Lacour}, title = {{Modular Synthesis, Orthogonal Post-Functionalization, Absorption, and Chiroptical Properties of Cationic [6]Helicenes}}, journal= {Angew. Chem. Intl. Ed.}, ISSN = {1433-7851}, volume= {52}, number= {6}, pages = {1796-1800}, url = {http://doi.wiley.com/10.1002/anie.201208926}, eprint= {http://www.unige.ch/sciences/chifi/publis/refs_pdf/ref01331.pdf}, doi= {10.1002/anie.201208926}, keywords= {arenes;helical structures;synthetic methods;UV/Vis spectroscopy;vicarious nucleophilic substitution}, abstract = {{Novel cationic diaza-, azaoxo-, and dioxo[6]helicenes are readily prepared and functionalized selectively by orthogonal aromatic electrophilic and vicarious nucleophilic substitutions (see scheme). Reductions, cross-coupling, or condensation reactions introduce additional diversity and allow tuning of the absorption properties up to the near-infrared region. The diaza salts can be resolved into single enantiomers.}}, year = {2013} }