Asymmetric Organocatalytic Electrophilic Heterofunctionalization of Oxindoles

The asymmetric synthesis of 3-substituted oxindoles is a topic of considerable importance because these functionalized heterocycles are found in many natural products and drugs. In the last decade, significant advances have been made towards the asymmetric synthesis of 3-heteroatom-substituted oxindoles as a result of major improvements in asymmetric organocatalysis. This review will focus on the different types of asymmetric electrophilic organocatalyzed reactions, including the amination, halogenation, hydroxylation, and sulfenylation of oxindoles to form their enantioenriched 3-heterosubstituted derivatives.