Publication
Mediaspace scheduled maintenance: Aug 25, 2026 07:00 - 12:00 AM. During this time, videos will be temporarily unavailable. Check status updates.
Ketoanilides containing alkyl side chains were readily cyclized to 3-hydroxy-2-oxindoles or spirooxindoles by a single or double intramolecular Friedel-Crafts reaction in the presence of trifluoroacetic acid (TFA) at room temperature or at 45 degrees C. alpha-Iminocarboxamides, generated in situ from ketoamides, cyclized similarly to 3-aminooxindoles under identical conditions.
Tobias Kippenberg, Guanhao Huang, Nils Johan Engelsen, Alberto Beccari
Thomas Keller, Lulu Liu, Abdolvahid Movahedirad
Luc Thévenaz, Tiago Filipe Pimentel Das Neves