in tetrahydrofuran; diethyl ether (N2); to indene in THF was added MeLi in ether and stirred for 1 h, Ru complex was added and refluxed for 4 h, solvents were removed in vac.; residue was extd. with hot hexane, soln. passed through alumina, bright yellow fraction was collected, solvent was removed under reduced pressure; elem. anal.;

in tetrahydrofuran under argon;

in tetrahydrofuran heating (60°C, 72 h), solvent removal (red. press.), residue extd. (toluene), volatiles removal (red. pressure), residue extd. (light petroleum, b.p. 40-60°C); chromy. (alumina), elution (light petroleum); collection of bright yellow band, concn. (red. pressure), cooling (-80°C, 24 h) on crystn., drying (vac.); elem. anal.;