1: [i-PrPPh3](+)Br(-) With n-butyllithium in tetrahydrofuran T=0°C; 0.5 h; Inert atmosphere; 2: 2-(2-trimethylsilyleth-1-yn-1-yl)benzaldehyde in tetrahydrofuran T=0 - 20°C; Wittig reaction; 4 h; Inert atmosphere;

1: isopropyl-triphenyl-phosphonium iodide With n-butyllithium in tetrahydrofuran T=0°C; 0.5 h; Inert atmosphere; 2: 2-(2-trimethylsilyleth-1-yn-1-yl)benzaldehyde in tetrahydrofuran T=0°C; 1 h; Inert atmosphere;

1.1: triethylamine; bis-triphenylphosphine-palladium(II) chloride; copper(l) iodide / 8 h / 50 °C / |Inert atmosphere 2.1: n-butyllithium / tetrahydrofuran / 0.5 h / 0 °C / |Inert atmosphere 2.2: 1 h / 0 °C / |Inert atmosphere View Scheme

1.1: triethylamine; bis-triphenylphosphine-palladium(II) chloride; copper(l) iodide / 8 h / 50 °C / |Inert atmosphere 2.1: n-butyllithium / tetrahydrofuran / 0.5 h / 0 °C / |Inert atmosphere 2.2: 1 h / 0 °C / |Inert atmosphere View Scheme

1.1: triethylamine; tetrakis(triphenylphosphine) palladium(0); copper(l) iodide / 0.17 h 1.2: 8.5 h / 25 °C / |Inert atmosphere 2.1: n-butyllithium / tetrahydrofuran / 0.5 h / 0 °C / |Inert atmosphere 2.2: 1 h / 20 °C / |Inert atmosphere View Scheme

tetrabutyl ammonium fluoride in tetrahydrofuran T=20°C; Inert atmosphere;