LAUSR.org creates dashboard-style pages of related content for over 1.5 million academic articles. Sign Up to like articles & get recommendations!

Copper(II)-Catalyzed C-H Nitrogenation/Annulation Cascade of Ketene N,S-Acetals with Aryldiazonium Salts: A Direct Access to N2-Substituted Triazole and Triazine Derivatives.

Photo by bermixstudio from unsplash

Direct synthesis of N2-substituted triazole and triazine derivatives has been a challenge in N-heterocyclic chemistry. Under copper(II) catalysis ketene N,S-acetals, that is, alkylthio-substituted enaminones, efficiently reacted with aryldiazonium salts to… Click to show full abstract

Direct synthesis of N2-substituted triazole and triazine derivatives has been a challenge in N-heterocyclic chemistry. Under copper(II) catalysis ketene N,S-acetals, that is, alkylthio-substituted enaminones, efficiently reacted with aryldiazonium salts to allow the regioselective generation of functionally diverse N2-substituted 1,2,3-triazoles and 2,3-dihydro-1,2,4-triazines. The oxidant and base-dependent reaction yielded the five- and six-membered N-heterocyclic products, respectively. The synthetic protocol features broad substrate scopes and good functional group tolerance under mild conditions. The mechanistic studies have revealed that the reaction proceeds via alkenyl azo/imino hydrazone intermediates.

Keywords: aryldiazonium salts; triazole triazine; substituted triazole; triazine derivatives; ketene acetals

Journal Title: Organic letters
Year Published: 2019

Link to full text (if available)


Share on Social Media:                               Sign Up to like & get
recommendations!

Related content

More Information              News              Social Media              Video              Recommended



                Click one of the above tabs to view related content.