Diastereoselective tricyclization/dimerization of yne-indoles catalyzed by a Au(III) complex featuring an L2/Z-type ligand

In order to investigate catalyst activation via a (Au → B)8 interaction, Au(DPB)X3 (DPB = diphosphine-borane) featuring an L2/Z ligand was synthesized. The resulting cationic catalyst was utilized for the unprecedented diastereoselective tricyclization/dimerization of yne-indoles.