1: 3,5-Bis-trimethylsilyl-bromobenzene With iodine; magnesium in tetrahydrofuran 6 h; Heating; 2: allyl bromide With palladium dichloride in tetrahydrofuran T=0 - 20°C; Further stages.;

1.1: n-BuLi / diethyl ether / 1 h / -78 °C 1.2: 99 percent / diethyl ether / -78 - 20 °C 2.1: Mg; I2 / tetrahydrofuran / 6 h / Heating 2.2: 92 percent / PdCl2 / tetrahydrofuran / 0 - 20 °C View Scheme