1: 2-bromo-1,3,5-triisopropylbenzene With magnesium; ethylene dibromide in tetrahydrofuran T=65°C; 1 h; 2: 1-bromo-2-chloro-benzene in tetrahydrofuran T=65°C; 1 h; 3: chlorodi-tert-butylphosphine With copper(l) chloride in tetrahydrofuran T=20°C; 20 h;