1: benzo[b]thiophene With ethyl magnesium chloride; N,N-dicyclohexylamine in tetrahydrofuran T=60°C; 24 h; 2: 4-bromo-N,N-dimethyl-aniline With PEPPSI™.IPr in tetrahydrofuran T=20°C; 19 h;

K2S in N,N-dimethyl-formamide T=140°C; 24 h; Schlenk techniqueInert atmosphere;

1: toluene / 6 h / 120 °C 2: potassium tert-butylate / tetrahydrofuran / 5 h / |Schlenk technique 3: K2S / N,N-dimethyl-formamide / 24 h / 140 °C / |Schlenk technique; |Inert atmosphere View Scheme