1: dimethyl(phenyl)silyl chloride With lithium in tetrahydrofuran T=0°C; 6 h; Inert atmosphere; 2: With iso-propylmagnesium bromide in tetrahydrofuran; 2-methyl tetrahydrofuran T=0°C; 0.333333 h; Inert atmosphere; 3: ClMe2Si–SiMe2–SiMe2Cl in tetrahydrofuran; 2-methyl tetrahydrofuran T=0 - 20°C; Inert atmosphere;

1.1: hydrogenchloride; AlCl3, aluminium chloride / benzene / 1 h / 20 °C 2.1: lithium / tetrahydrofuran / 6 h / 0 °C / Inert atmosphere 2.2: 0.33 h / 0 °C / Inert atmosphere 2.3: 0 - 20 °C / Inert atmosphere View Scheme

lithium in tetrahydrofuran 3 h;

1: 81 percent / Me3SiCl, AlCl3 / Heating 2: 1) Li / 1) THF, r.t., 2) THF, a) 12 h, r.t., b) 2 h, reflux View Scheme

lithium 1) THF, r.t., 2) THF, a) 12 h, r.t., b) 2 h, reflux; Yield given. Multistep reaction;

hydrogenchloride; aluminium trichloride in benzene Yield given;

hydrogenchloride; AlCl3, aluminium chloride in benzene T=20°C; 1 h;