1: thien-2-yl bromide With magnesium in diethyl ether Metallation; 1 h; Heating; 2: 2,5-Dibromo-3,4-dihexylthiophene With (1,1'-bis(diphenylphosphino)ferrocene)palladium(II) dichloride in diethyl ether T=20°C; Substitution; 20 h; Further stages.;

1.1: 86 percent / [NiCl2(dppp)] / tetrahydrofuran; diethyl ether / 15 h / 20 °C 2.1: 86 percent / N-bromosuccinimide / acetic acid; CH2Cl2 / 2 h 3.1: Mg / diethyl ether / 1 h / Heating 3.2: 90 percent / [PdCl2dppf] / diethyl ether / 20 h / 20 °C View Scheme

1.1: 86 percent / N-bromosuccinimide / acetic acid; CH2Cl2 / 2 h 2.1: Mg / diethyl ether / 1 h / Heating 2.2: 90 percent / [PdCl2dppf] / diethyl ether / 20 h / 20 °C View Scheme

tetrakis(triphenylphosphine) palladium(0) in toluene Inert atmosphere;

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