1: isopropenylbenzene With N-bromosuccinmide in tetrachloromethane T=95 - 100°C; 10 h; 2: With triphenylphosphine in benzene 3: benzaldehyde With n-butyllithium in tetrahydrofuran; hexane T=20°C; 1.5 h;

n-butyllithium 1) THF, hexane, -25 - -50 deg C, 15 min; r.t., 1 h, 2) 25 deg C 72 h; Yield given. Multistep reaction;

bis(1,5-cyclooctadiene)nickel (0); tri-cyclo-hexyl-phosphine in toluene T=130°C; 24 h; Inert atmosphere;