Synthesis of 2,2′-bis(1-(2-aryl)-1H-pyrazol-4-yl)-3,3,3′,3′-tetramethyl-3H,3′H-5,5′-biindoles and 2,7-bis(1-(3-aryl)-1H-pyrazol-4-yl)-1,1,6,6-tetramethyl-1,6-dihydroindolo[7,6-g]indoles