Organocatalytic cascade aldimine condensation/[1,6]-hydride transfer/Mannich-type cyclization: sustainable access to indole-2,3-fused diazocanes

An unprecedented organocatalytic cascade aldimine condensation/[1,6]-hydride transfer/Mannich-type cyclization of indole-2-carbaldehydes with o -aminoanilines was developed to assemble indole-2,3-fused diazocanes in one step.