1: 11-bromo-undec-1-ene With iodine; magnesium in diethyl ether T=20°C; Inert atmosphereReflux; 2: dimethyl-dichlorosilane in tetrahydrofuran; diethyl ether T=20°C; Inert atmosphere;

diethyl ether anschliessend Behandeln mit Chlor-dimethyl-silan;