Rhodium(I)-mediated synthesis of benzo[2,1-b:3,4-b':5,6-c'']trithiophenes and naphtho[2,1-b:3,4-b']dithiophenes

Article abstract of DOI:10.1055/s-1997-1310

The syntheses of carbonylated benzo[2,1-b:3,4-b':5,6-c'']trithiophenes 2 and naphtho[2,1-b:3,4-b']dithiophenes 3 are described. The treatment of 5,5'-dicarbonylated 3,3'-bis(phenylethynyl) -2,2'-bithiophenes 6 [readily available via Pd(II)-catalyzed alkyn