1: ruthenium trichloride; 5-EtCp; 1-methyl-2,4-cyclopentadiene With triphenylphosphine in ethanol 2 h; Heating / reflux; 2: lithium ethylcyclopentadienide in tetrahydrofuran 4 h; Heating / reflux;

in tetrahydrofuran

Li2CO3 in ethanol; acetonitrile soln. of Ru-complex and 10 equiv. of Li2CO3 in a mixt. of ethanol, 1.25 equiv. of MeCN and ligand were refluxed for 4 h under N2; solvents was evapd., residue was extd. with Et2O and filtered over alumina, soln. was cooled to -80 °C, elem. anal.;

in ethylene glycol Kinetics; Ar-atmosphere; refluxing;

in diethyl ether reduction in dry ether;; purification with thin-layer chromatography;;