Synthesis of 2,10,11-Trisubstituted Indolo[3,2-b]quinolines

A new method has been developed for the synthesis of derivatives of indolo3,2-b]quinolines-11 based on N-oxidization of 2-nitro-10-substituted indolo3,2-b]quinolines with subsequent conversion of the mixtures obtained into 2-nitro-11-substituted indolo3,2-b]quinolinones-11. A series of 2-nitro-11-substituted indolo3,2-b]quinolines was prepared.