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.
If you can't find a tool you're looking for, please click the link at the top of the page to "Go to old article view". Alternatively, view our Knowledge Base articles for additional help. Your feedback is important to us, so please let us know if you have comments or ideas for improvement.