1: in acetonitrile T=20°C; 0.0833333 h; 2: With 2,2'-(1,2-phenylenediylbisnitrilomethylidine)bis(4-hydroxyphenolato)nickel(II) in acetonitrile T=20°C; 1 h; regioselective reaction;

cobalt(II)salen in ethylene glycol T=20°C; 2.6 h;

in ethanol; water T=20°C; 12 h;