... In conclusion, we have described a novel and efficient route for the preparation of dithieno[3,2-b:6,7-b ... Chem., 2010, 20, 10568–10576 RSC ; (h) JE Anthony, Chem. ... Mater., 1997, 9, 36–39 CrossRef CAS ; (e) K. Takimiya, Y. Kunugi, Y. Konda, N. Niihara and T. Otsubo, J. Am. ...