1: dichlorobis(methyldiphenylsilyl)methane With n-butyllithium in tetrahydrofuran; hexane T=-78°C; 0.0833333 h; 2: methylmagnesium bromide in tetrahydrofuran; hexane T=0°C; 1 h; 3: With air; ammonium chloride in tetrahydrofuran; hexane; water T=20°C; 0.5 h;

1.1: 85 percent / n-BuLi; diisopropylamine / hexane; tetrahydrofuran / -78 - 20 °C 2.1: n-BuLi / tetrahydrofuran; hexane / 0.08 h / -78 °C 2.2: CuCN*2LiCl / tetrahydrofuran; hexane / 1 h / 0 °C 2.3: 47 percent / NH4Cl; air / tetrahydrofuran; hexane; H2O / 0.5 h / 20 °C View Scheme