Synthesis of Indoles via Intramolecular Arylation Reactions

The Cu( I)-catalyzed intramolecular arylation approach as an efficient route toward the construction of multisubstituted indole cores was first demonstrated by Cusack. 

Finally, Ma reported a general strategy for the synthesis of pharmacologically important 3-acyloxindole derivatives utilizing a C3-C3a disconnection approach. 

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