boron trifluoride diethyl etherate; copper diacetate in diethyl ether; toluene T=20°C; 15 h;

1,3-Diiodo-5,5-dimethyl-2,4-imidazolidinedione in tetrachloromethane T=60°C; 24 h; Inert atmosphere;

dicobalt octacarbonyl in benzene T=180°C; P=56886.3 - 67229.2 Torr; stainless steel autoclave;

dicobalt octacarbonyl in benzene T=180°C; P=56886.3 - 67229.2 Torr; stainless steel autoclave; Further byproducts given;

dicobalt octacarbonyl in benzene T=180°C; P=56886.3 - 67229.2 Torr; stainless steel autoclave; Further byproducts given;

silica perchloric acid in 1,4-dioxane 4 h; Reflux;

1.1: bis(1,5-cyclooctadiene)-rhodium(I) tetrafluoroborate; 1,4-di(diphenylphosphino)-butane; benzo[1,3,2]dioxaborole / tetrahydrofuran / 20 °C / Inert atmosphere 1.2: 20 °C / Inert atmosphere 2.1: boron trifluoride diethyl etherate; copper diacetate / diethyl ether; toluene / 15 h / 20 °C View Scheme