A substance containing scandium that functions as a catalyst is known as a scandium catalyst, where scandium typically exhibits a valence of +3. Although not widely utilized, the scandium catalyst plays a significant role in organic catalysis due to its exceptional performance in various reactions such as domino and tandem reactions, cycloadditions, Michael additions, ring-opening reactions, Friedel-Crafts reactions, ring-expansion reactions, rearrangement reactions, polymerization reactions, and asymmetric reactions. Particularly, chiral complexes derived from Sc(OTf)3 have emerged as unique promoters for a variety of asymmetric transformations since Kobayashi's pioneering work in 1994 on asymmetric scandium-catalyzed Diels-Alder cycloadditions.