One-pot access to 11-methyl-6H-indolo[2,3-b]quinolines via iodine-mediated annulation of indoles with 2-vinylanilines and evaluation of their biological activities

A simple, straightforward and efficient method for the synthesis of a series of 11-methyl-6 H -indolo[2,3- b ]quinolines bearing different substituents on the indole and quinoline rings is described.