in 1,2-dichloro-benzene T=180°C; 24 h; Sealed tube; regioselective reaction;

1.1: n-butyllithium / hexane / 0.5 h / -78 °C / |Inert atmosphere 1.2: -78 - 20 °C / |Inert atmosphere 2.1: lithium borohydride / tetrahydrofuran / 20 °C / |Cooling with ice; |Inert atmosphere 3.1: 1,2-dichloro-benzene / 24 h / 180 °C / |Sealed tube View Scheme

triethylamine in benzene 72 h; Heating; Title compound not separated from byproducts;