Facile Synthesis of Tetrahydro-1<i>H</i>-isoindolones via a Sequential Three-Component Copper-Catalyzed Coupling/Propargyl-Allenyl Isomerization/[4 + 2] Cyclization Reaction

An interesting sequential three-component copper-catalyzed coupling/propargyl-allenyl isomerization/[4 + 2] cyclization reaction, providing a facile synthesis of highly substituted tetrahydro-1H-isoindolones from conjugated vinylic alkynes, imines, and α,β-unsaturated enoic acid chlorides is reported. The most attractive feature of this transformation is that three stereogenic centers could be generated in one step with high diastereoselectivity.