Cu(OTf)2 catalysed [6+2] cycloaddition reaction for the synthesis of highly substituted pyrrolo[1,2-a]indoles: rapid construction of the yuremamine core.

Lewis acid catalysed [6+2] cycloaddition reaction for the synthesis of pyrrolo[1,2-a]indoles generating three contiguous stereocenters in a highly regio- and diastereoselective manner has been developed and further applied for the construction of the fully functionalized tricyclic core of yuremamine.