Enantioselective Synthesis of Heterohelicenes via Organocatalyzed Oxidative Formal [3 + 2] Cycloadditions between Polycyclic Indoles and Quinones
Helicenes are a class of structurally fascinating polycyclic aromatic molecules composed of ortho-fused aromatic rings, which adopt a screwed shape and exhibit helical chirality due to the steric repulsion between the two terminal rings. However, the catalytic enantioselective synthesis of helicenes, especially those...