1: lithium aluminium tetrahydride / diethyl ether / 1 h / 0 - 20 °C / |Inert atmosphere 2: triethylamine; 1-propanephosphonic acid cyclic anhydride / ethyl acetate / 6 h / 20 °C / |Inert atmosphere 3: boron trifluoride diethyl etherate / dichloromethane / 36 h / 0 - 20 °C / |Inert atmosphere 4: (SPY-5-31)-dichloro-(κ2(C,O)-(2-isopropyloxybenzylidene))(1,3-bis(2,4,6-trimethylphenyl)-4,5-dihydroimidazol-2-ylidene)ruthenium / dichloromethane / 18 h / 40 °C / |Inert atmosphere 5: 5 palladium on charcoal; hydrogen / ethanol / 16 h / 20 °C View Scheme

1: triethylamine; 1-propanephosphonic acid cyclic anhydride / ethyl acetate / 6 h / 20 °C / |Inert atmosphere 2: boron trifluoride diethyl etherate / dichloromethane / 36 h / 0 - 20 °C / |Inert atmosphere 3: (SPY-5-31)-dichloro-(κ2(C,O)-(2-isopropyloxybenzylidene))(1,3-bis(2,4,6-trimethylphenyl)-4,5-dihydroimidazol-2-ylidene)ruthenium / dichloromethane / 18 h / 40 °C / |Inert atmosphere 4: 5 palladium on charcoal; hydrogen / ethanol / 16 h / 20 °C View Scheme

1: boron trifluoride diethyl etherate / dichloromethane / 36 h / 0 - 20 °C / |Inert atmosphere 2: (SPY-5-31)-dichloro-(κ2(C,O)-(2-isopropyloxybenzylidene))(1,3-bis(2,4,6-trimethylphenyl)-4,5-dihydroimidazol-2-ylidene)ruthenium / dichloromethane / 18 h / 40 °C / |Inert atmosphere 3: 5 palladium on charcoal; hydrogen / ethanol / 16 h / 20 °C View Scheme

1: (SPY-5-31)-dichloro-(κ2(C,O)-(2-isopropyloxybenzylidene))(1,3-bis(2,4,6-trimethylphenyl)-4,5-dihydroimidazol-2-ylidene)ruthenium / dichloromethane / 18 h / 40 °C / |Inert atmosphere 2: 5 palladium on charcoal; hydrogen / ethanol / 16 h / 20 °C View Scheme

T=305°C;

T=240 - 250°C; unter Druck.Hydrogenation;

T=100°C; Hydrogenation;