Recent Studies of Bifunctionalization of Simple Indoles

Indole structures are extremely important and widely employed in organic synthesis. This review will focus on direct bifunctionalizations of simple indoles in tandem reactions. Recent studies have been divided into four types by trigger mechanisms: (1) nucleophilic C3; (2) nucleophilic NH for cyclization; (3) reduction; (4) oxidation. Reactions with carbocations, pyridines, alkenes, alkynes, aldehydes, imines, halogenated compounds et al were...