n-butyllithium in tetrahydrofuran Li-compd. soln. add. to org. compd. soln. at 0°C (stirring), stirring 10 min. at 0°C, Sn-compd addn. stirring 30 min at room temp., solvent removal under reduced pressure, residue extn. 3 times (hexane), solvent removal; distn.; elem. anal.;

bis-triphenylphosphine-palladium(II) chloride in tetrahydrofuran 20 h; Heating;

bis-triphenylphosphine-palladium(II) chloride in tetrahydrofuran 20 h; Heating;

bis-triphenylphosphine-palladium(II) chloride in tetrahydrofuran 20 h; Heating;

bis-triphenylphosphine-palladium(II) chloride in tetrahydrofuran 1.) reflux, 7 h, 2.) RT, 12 h;

bis-triphenylphosphine-palladium(II) chloride in tetrahydrofuran 1.) reflux, 8 h, 2.) RT, 12 h;

bis-triphenylphosphine-palladium(II) chloride in tetrahydrofuran 1.) reflux, 8 h, 2.) RT, 12 h;