Highly Efficient Construction of Pentacyclic Carboline‐Containing Salts via a [Cp*RhCl2]2‐Catalyzed Tandem Reaction

Abstract A [Cp*RhCl 2 ] 2 ‐catalyzed tandem reaction of indolyl aldehydes, amines, and alkynes featuring the formation of two C−C bonds, two C−N bonds, and one C=N bond is described. This strategy involves double C−H activation and double insertion of alkynes, furnishing a series of pentacyclic carboline‐containing salts in good yields under mild conditions. It provides a good choice for rapidly constructing libraries of such pentacyclic carboline‐containing salts.