• Medientyp: E-Artikel
  • Titel: Palladium‐Catalyzed Site‐Selective [3+2] Annulation via Benzylic and meta C−H Bond Activation
  • Beteiligte: He, Qiyuan; Chatani, Naoto
  • Erschienen: Wiley, 2021
  • Erschienen in: Angewandte Chemie
  • Sprache: Englisch
  • DOI: 10.1002/ange.202015054
  • ISSN: 0044-8249; 1521-3757
  • Schlagwörter: General Medicine
  • Entstehung:
  • Anmerkungen:
  • Beschreibung: <jats:title>Abstract</jats:title><jats:p>The palladium‐catalyzed [3+2] annulation of aromatic amides with maleimides via the activation of ortho benzylic C−H and meta C−H bonds is reported. Carboxamide and anilide type substrates that contain a 2‐methylthiophenyl group both participate in this [3+2] annulation, indicating that the presence of a 2‐methylthiophenyl directing group is a key for the success of the reaction. The first C−H bond activation at the benzylic C−H bond is followed by a second C−H bond activation at the meta C−H bond to give five‐membered cyclic products. The cleavage of these C−H bonds is irreversible.</jats:p>