Scheme 4.
Natural product syntheses that make use of palladium-catalyzed intermolecular [3 + 2] cycloadditions of TMM. (A) Synthesis of marcfortine B (8) uses a palladium-catalyzed carboxylatve TMM [3 + 2] cycloaddition [38–39]. (B) Enantioselective synthesis of marcfortine C (9) features a palladium-catalyzed asymmetric cyano-substituted TMM [3 + 2] cycloaddition [39].
