(IPr)NiCl2PPh3 in tetrahydrofuran T=20°C; 0.833333 h; Reflux;

1: 4-tert-butyl-2',3'-bis(chloromethyl)biphenyl With magnesium-anthracene in tetrahydrofuran T=0 - 20°C; 1 h; 2: methyl acetate in tetrahydrofuran T=0 - 20°C; 3: With toluene-4-sulfonic acid in toluene 1.5 h; Heating / reflux;