A convenient synthesis of 11H-indolo[3,2-c]quinolines carrying a substituent, such as 1-hydroxyalkyl, 1-alkoxyalkyl, or 1-(dialkylamino)alkyl, at the 6-position by electrophile-mediated cyclization reactions of 2-(2-isocyanophenyl)-1-methyl-1H-indole is described. © 2005 The Chemical Society of Japan.