1: ((1,1'-biphenyl-4-yl)methyl)triphenylphosphonium bromide With n-butyllithium in tetrahydrofuran T=-78 - 20°C; Wittig reaction; 12 h; Inert atmosphere; 2: β-naphthaldehyde in tetrahydrofuran Wittig reaction; 12 h; Inert atmosphere;

1.1: N-bromosuccinmide; dibenzoyl peroxide / tetrachloromethane / Reflux 2.1: toluene / 12 h / Reflux 3.1: n-butyllithium / tetrahydrofuran / 12 h / -78 - 20 °C / Inert atmosphere 3.2: 12 h / Inert atmosphere View Scheme

1.1: toluene / 12 h / Reflux 2.1: n-butyllithium / tetrahydrofuran / 12 h / -78 - 20 °C / Inert atmosphere 2.2: 12 h / Inert atmosphere View Scheme