1: With [2,2']bipyridinyl; nickel dichloride; zinc in N,N-dimethyl-formamide T=70°C; 6 h; 2: With dihydrogen peroxide in N,N-dimethyl-formamide T=30 - 40°C; 0.5 h;

1: With 1,10-phenanthroline; nickel dichloride; zinc in N,N-dimethyl-formamide T=70°C; 6 h; 2: With dihydrogen peroxide in N,N-dimethyl-formamide T=30 - 40°C; 0.5 h; Title compound not separated from byproducts;