Abstract An efficient synthesis of three new kinds of heterocyclic systems, 9H-indolo [3, 2-c] pyrazolo [1, 5-a] quinolines, 1H-dipyrazolo [1, 5-a: 4′, 3′-c] quinolines and 1H-imidazo [4, 5-c] pyrazolo [1, 5-a] quinolines, has been achieved by the photochemical oxidative dehydrogenation and subsequent photocyclization and dehydrochlorination of 5-(2-chloro- 1H-indol-3-yl)-, 5-(5-chloro-1H-pyrazol-4-yl)-and 5-(5-chloro-1H-imidazol-4-yl)-1-phenyl-4 ...
