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

1.1: diisopropylamine; n-butyllithium / tetrahydrofuran; hexane / 2.25 h / -78 - 20 °C 1.2: 97 percent / tetrahydrofuran; hexane / 23 h / -78 - 20 °C 2.1: n-butyllithium / tetrahydrofuran; hexane / 0.33 h / 0 °C 2.2: 76 percent / tetrahydrofuran; hexane View Scheme

1.1: diisopropylamine; n-butyllithium / tetrahydrofuran; hexane / 2.25 h / -78 - 20 °C 1.2: 97 percent / tetrahydrofuran; hexane / 23 h / -78 - 20 °C 2.1: n-butyllithium / tetrahydrofuran; hexane / 0.33 h / 0 °C 2.2: 76 percent / tetrahydrofuran; hexane View Scheme