Synthesis and characterization of α,ω-disubstituted quaterthiophenes functionalized with polar groups for solution processed OTFTs
作者:Giuseppe Romanazzi、Francesco Marinelli、Piero Mastrorilli、Luisa Torsi、Ahlam Sibaouih、Minna Räisänen、Timo Repo、Pinalysa Cosma、Gian Paolo Suranna、Cosimo Francesco Nobile
DOI:10.1016/j.tet.2009.09.065
日期:2009.11
ω-terminal positions separated from the quaterthiophene core by ethylene (4Ta–c), vinylene (4Td–f) or ethynylene (4Tg) spacers was synthesized by means of a Pd-catalyzed homocoupling of bithiophenes proceeding via C–Hbond activation. The synthetic approach gave satisfying yields of 4Ta–f but resulted in only 3% yield of 4Tg due to the competitive hydrofluorination of the triple bond. The quaterthiophenes 4Ta–g