1: 1-benzyl-1H-indene With n-butyllithium in diethyl ether T=-78 - 20°C; 2: dimethyl-dichlorosilane in diethyl ether T=-78°C; 12 h;

1.1: diethyl ether; tetrahydrofuran / -78 - 20 °C 1.2: tetrahydrofuran; diethyl ether / 10 h / -78 °C 2.1: nBuLi / diethyl ether / -78 - 20 °C 2.2: diethyl ether / 12 h / -78 °C View Scheme

1.1: diethyl ether; tetrahydrofuran / -78 - 20 °C 1.2: tetrahydrofuran; diethyl ether / 10 h / -78 °C 2.1: nBuLi / diethyl ether / -78 - 20 °C 2.2: diethyl ether / 12 h / -78 °C View Scheme