1.1: diborane / tetrahydrofuran / 8 h / |Inert atmosphere; |Reflux 2.1: sodium hydride / 1,2-dichloro-ethane / 0 °C / |Inert atmosphere 2.2: 0 - 20 °C / |Inert atmosphere 3.1: caesium carbonate; palladium diacetate; PCy3∙HBF4; 2,2,2-trimethylacetic acid / toluene / 12 h / 110 °C / |Inert atmosphere 4.1: Red-Al / toluene / 10 h / 50 °C / |Inert atmosphere View Scheme

1: With triethylamine in dichloromethane T=0°C; 0.0833333 h; Inert atmosphere; 2: With 4-(N,N-dimethlyamino)pyridine in dichloromethane T=20°C; Inert atmosphere;