Synthesis of Benzo[<i>c</i>][2,7]naphthyridinones and Benzo[<i>c</i>][2,6]naphthyridinones via Ruthenium-Catalyzed [2+2+2] Cycloaddition between 1,7-Diynes and Cyanamides
Steve Huvelle, Pascal Matton, Christine Tran, Marie‐Noëlle Rager, Mansour Haddad, Virginie Ratovelomanana‐Vidal
Abstract
A convenient method for the ruthenium-catalyzed synthesis of benzo[c]naphthyridinone derivatives is reported. The [2+2+2] cycloaddition from various mono- and disubstituted 1,7-diynes and cyanamides provided benzo[c][2,7]naphthyridinones as major products and benzo[c][2,6]naphthyridinones as minor ones in yields of ≤79% and regioselectivities of ≤99:1. This method is amenable to internal and terminal diynes and a number of cyanamides with diverse functional group tolerance.
Topics & Concepts
ChemistryCycloadditionRutheniumCatalysisMedicinal chemistryFunctional groupCombinatorial chemistryStereochemistryOrganic chemistryPolymerCatalytic Alkyne ReactionsCatalytic C–H Functionalization MethodsCyclopropane Reaction Mechanisms