The palladium-catalyzed tandem cyclization-cross-coupling protocol using 1H-indol-2-yltrialkylborate (indolylborate) proved to be a versatile approach to the generation of 2-(4-piperidylmethyl)indole, which was successfully used for the preparation of (+/-)-tubifoline.
A new entry into the synthesis of the strychnos indole alkaloids containing 19,20-double bond via the thio-claiser rearrangement