indium trifluoromethanesulfonate in 1,2-dichloro-ethane T=115°C; 12 h; Inert atmosphereSchlenk technique;

1.1: tris(4-methylphenyl)-phosphine; trimethylsilyl-methylmagnesium chloride; cobalt(II) dibromide / tetrahydrofuran / 0.5 h / |Inert atmosphere; |Schlenk technique; |Cooling with ice 1.2: 12 h / 40 °C / |Inert atmosphere; |Schlenk technique 2.1: water; hydrogenchloride / ethyl acetate / 0.5 h / 20 °C / |Inert atmosphere 3.1: indium trifluoromethanesulfonate / 1,2-dichloro-ethane / 12 h / 115 °C / |Inert atmosphere; |Schlenk technique View Scheme