in tetrahydrofuran Ar atmosphere, stirring of Ni-complex and TlBF4 in THF (20°C, 2 h), removal of pptd. TlCl (filtn.), addn. of K-carboxylate, stirring (20°C, 2 h); removal of pptd. KBF4, partial evapn., pptn. on pentane addn., collection, washing (pentane), drying (vac.); elem. anal.;

hydrogenchloride; potassium hydroxide in dimethyl sulfoxide T=55 - 60°C; 20 h;

1: 58 percent / dimethylformamide / 0.33 h / Heating 2: 98 percent / SF4 / 20 h / 20 °C View Scheme