Synthesis of some 11H-indolo[3,2-c][1,8]naphthyridines.

The preparation of some 11H-indolo[3,2-c] [1,8]naphthyridines (V), having oxygen functions at positions 3 or 3 and 10 or 3 and 8, as in steroidal active compounds, is described. Compounds (V) were obtained using the Fisher indole synthesis. The preparation of the parent nucleus: 11H-indolo [3,2-c] [1,8]naphthyridines (V n) is also described. Some compounds were subjected to pharmacological screening, but none was found to be significantly active.