Efficient Routes to Pyrazolo[3,4-<i>b</i>]indoles and Pyrazolo[1,5-<i>a</i>]benzimidazoles via Palladium- and Copper-Catalyzed Intramolecular C−C and C−N Bond Formation

Efficient synthetic routes to pyrazolo[3,4-b]indoles and pyrazolo[1,5-a]benzimidazoles via intramolecular palladium- and copper-catalyzed cyclization of 1-aryl/1-unsubstituted 5-(2-bromoanilino)pyrazole precursors via intramolecular C−C and C−N bond formation have been reported.