Aryl iodane-induced cascade arylation-1,2-silyl shift-heterocyclization of propargylsilanes under copper catalysis.

ABSTRACT: A novel copper-catalyzed arylation strategy for propargylsilanes utilizing diaryl-λ³-iodanes has been developed, enabling a cascade sequence involving 1,2-silyl migration and heterocyclization. The β-silicon effect facilitates the formation of stabilized allyl cation intermediates that undergo regioselective trapping by internal O- and N-nucleophiles furnishing functionalized heterocycles. This method provides access to tetrahydrofuran or pyrrolidine frameworks, each bearing a trifunctionalized (E)-configured vinyl side chain. The use of a shorter linker provides entry to 1,2,3,6-tetrahydropyridines. Additionally, in the absence of internal nucleophiles, this methodology yields aryl-substituted 1,3-dienes. This work introduces a palladium-free, single-step a

SUBMITTER: Kronkalne R 

PROVIDER: S-EPMC12477899 | biostudies-literature | 2025

REPOSITORIES: biostudies-literature