1: Methyltriphenylphosphonium bromide With n-butyllithium in tetrahydrofuran; hexane T=0°C; 0.333333 h; 2: 2,5-dimethyl-1-phenyl-4-hexen-1-one in tetrahydrofuran; hexane

1.1: NaH / tetrahydrofuran 1.2: 63 percent / tetrahydrofuran / 24 h / 60 °C 2.1: n-butyllithium / tetrahydrofuran; hexane / 0.33 h / 0 °C 2.2: 80 percent / tetrahydrofuran; hexane View Scheme