Dimerization of indole derivatives with hypervalent iodines(III): a new entry for the concise total synthesis of rac- and meso-chimonanthines

Hypervalent iodine(III)-induced dimerization of indole derivatives, mitragynine, tetrahydrocarbazole, and Nb-carbomethoxytryptamine, was investigated. By applying this procedure, the concise total synthesis of rac- and meso-chimonanthines was accomplished.