1: 2-bromo-2'-isopropylbiphenyl With n-butyllithium in tetrahydrofuran; hexane T=-78°C; Metallation; 1 h; 2: chloro-dicyclohexylphosphine in tetrahydrofuran; hexane Condensation; a) -78 deg C, 15 min, b) RT, 20 h;