SNH Arylamination of 5-, 6-, 7-, and 8-nitroquinolines in anhydrous DMSO gave not only the arylamino derivatives of the respective nitroquinolines, but also the arylamino derivatives of nitrosoquinolines. In the case of 6-nitroquinoline, the first representatives of polycyclic structures on the basis of pyrido[3,2-a]phenazine 7-oxide were isolated.
