The synthesis of phenanthrodibenzothiophenes

Abstract The synthesis of phenanthro[1,2‐c]dibenzothiophene (6), phenanthro[4,3‐c]dibenzothiophene (10), phenanthro[2,1‐a]dibenzothiophene (14), phenanthro[3,4‐a]dibenzothiophene (16), phenanthro[1,2‐a]dibenzothiophene (19), phenanthro[2,1‐b]dibenzothiophene (20), 8‐methylphenanthro[3,2‐a]dibenzothiophene (24), 7‐methylphenanthro[1,2‐a]dibenzothiophene (25), phenanthro[3,4‐a]dibenzothiophene (27), phenanthro[4,3‐a]‐dibenzothiophene (28), 6‐methylphenanthro[2,3‐a]dibenzothiophene (31), and 5‐methylphenanthro[4,3‐a]dibenzothiophene (32) is described.