The synthesis of polycyclic thiophenes derived from phenanthrene intermediates

Abstract The synthesis of benzo[b]triphenyleno[2,1‐d]thiophene (9), benzo[b]triphenyleno[1,2‐d]thiophene (13), 5‐methylbenz[7,8]anthra[2,1‐b]thiophene (17), l‐methylchryseno[3,4‐b]thiophene (18), triphenyleno[1,2‐c]dibenzothiophene (22), triphenyleno[2,1‐a]dibenzothiophene (26), triphenyleno[1,2‐a]dibenzothiophene (29), and triphenyleno[2,1‐b]dibenzothiophene (30) is described.