Corrole synthesis by dipyrromethane–dicarbinol and 2,2′-bipyrrole condensation

A3 and trans-A2B tris-aryl corroles 1a–c have been synthesized in up to 12% yield by BF3·Et2O-catalyzed condensation of dipyrromethane–dicarbinol and 2,2′-bipyrrole (1:1 ratio) in acetonitrile at room temperature for 24 h.