1.1: magnesium sulfate / diethyl ether / 20 °C 2.1: bis(1,5-cyclooctadiene)nickel (0); Ipr.HCl; cesium fluoride / 1,4-dioxane; toluene / 0.5 h / 20 °C / Inert atmosphere 2.2: 10 h / 60 °C / Inert atmosphere 3.1: toluene / 14 h / 80 °C View Scheme

1.1: bis(1,5-cyclooctadiene)nickel (0); Ipr.HCl; cesium fluoride / 1,4-dioxane; toluene / 0.5 h / 20 °C / Inert atmosphere 1.2: 10 h / 60 °C / Inert atmosphere 2.1: toluene / 14 h / 80 °C View Scheme

in toluene T=80°C; 14 h;