10.24.1 Product Subclass 1: Pyrido[1,2-a]indoles and Related Benzo-Fused Ring Systems

This review describes methods for the synthesis of pyrido[1,2-a]indoles, as well as the related benzo-fused ring systems indolo[1,2-a]quinolines, indolo[1,2-b]isoquinolines, indolo[2,1-a]isoquinolines, and indolo[1,2-f]phenanthridines. The most common routes to access these ring systems involve a variety of transition-metal-catalyzed cyclizations, but alternative approaches are also covered.