• Reactant in stereoselective preparation of substituted indoles via rhodium-catalyzed enantioselective coupling reaction of indoles with diazo compounds1 • Reactant in stereoselective synthesis of indolines via palladium-catalyzed asymmetric hydrogenation of unprotected indoles2 • Reactant in enantioselective synthesis of fluorene derivatives via Friedel-Crafts reactions3 • Reactant in preparation of bis-indolyldihydroxybenzoquinones by addition indoles to dichlorobenzoquinone promoted by Bronsted acid4 • Reactant in reaction with hydroxypyrazolines5