N-bromosuccinmide; palladium diacetate 12 h; Heating;

manganese(IV) oxide in dichloromethane 24 h;

in tetrahydrofuran T=20°C; 0.5 h; Inert atmosphere;

1: ortho-dibromobenzene With magnesium in tetrahydrofuran Inert atmosphere; 2: 2-pyridine carbonitrile in tetrahydrofuran T=0°C; Inert atmosphere; 3: With hydrogenchloride; water in diethyl ether 0.5 h; Inert atmosphere;

manganese(IV) oxide 2.) ether; Yield given. Multistep reaction;