1: Methyltriphenylphosphonium bromide With n-butyllithium in tetrahydrofuran T=-20 - 20°C; Inert atmosphere; 2: 4-(2-(4-tert-butylphenyl)vinyl)benzaldehyde in tetrahydrofuran T=20°C; Wittig reaction; 3 h; Inert atmosphere;

n-butyllithium in tetrahydrofuran T=-20°C; Wittig reaction;

1: tetrabutylammomium bromide; potassium acetate; palladium diacetate; triphenylphosphine / N,N-dimethyl-formamide / 24 h / 90 °C / Inert atmosphere 2: lithium aluminium tetrahydride / tetrahydrofuran / 20 °C 3: dipyridinium dichromate / dichloromethane / 20 °C 4: n-butyllithium / tetrahydrofuran / -20 °C View Scheme

1: tetrabutylammomium bromide; potassium acetate; palladium diacetate; triphenylphosphine / N,N-dimethyl-formamide / 24 h / 90 °C / Inert atmosphere 2: lithium aluminium tetrahydride / tetrahydrofuran / 20 °C 3: dipyridinium dichromate / dichloromethane / 20 °C 4: n-butyllithium / tetrahydrofuran / -20 °C View Scheme

n-butyllithium in tetrahydrofuran T=20°C; Wittig Olefination; 3 h; Inert atmosphere;