1: potassium hexachloridoplatinate(IV); methyllithium in tetrahydrofuran T=0 - 20°C; 4 h; 2: With ethylene dibromide in tetrahydrofuran T=0°C; 1 h; 3: potassium iodide With hydrogenchloride in water
Mg in diethyl ether; benzene (inert atm.), Mg and Me3I in Et2O treated with dry benzene, treated withNa2PtCl6 at -20°C quickly under vigorous stirring, stirred for 2 h at 0°C; quenched to acidified H2O, aq. layer extd.(hexane), evapd.;
