1: Methyltriphenylphosphonium bromide With potassium tert-butylate in tetrahydrofuran T=0°C; Wittig Olefination; 1 h; Inert atmosphere; 2: 5-phenyl-5-hexen-2-one in tetrahydrofuran T=0 - 20°C; Wittig Olefination; 16 h; Inert atmosphere;

α-methyl-β-bromostyrene in tetrahydrofuran T=50°C; 0.5 h;

1.1: sodium hydride / tetrahydrofuran / 0.5 h / 0 °C / |Inert atmosphere 1.2: 16 h / 0 - 20 °C / |Inert atmosphere 2.1: sodium hydroxide / water; ethanol / 16 h / 70 °C 3.1: potassium tert-butylate / tetrahydrofuran / 1 h / 0 °C / |Inert atmosphere 3.2: 16 h / 0 - 20 °C / |Inert atmosphere View Scheme