cesium fluoride; cyclopalladated [1-(p-tolylimino)ethyl]ferrocene catalyst in 1,4-dioxane T=100°C; Suzuki coupling; 20 h;

1.1: Mg / tetrahydrofuran / 3 h / 20 - 50 °C 1.2: tetrahydrofuran / 2 h / -78 °C 2.1: 13.4 g / aq. HCl 3.1: 71 percent / CsF / cyclopalladated [1-(p-tolylimino)ethyl]ferrocene catalyst / dioxane / 20 h / 100 °C View Scheme

Yield given. Multistep reaction;