methyl iodide in diethyl ether N2-atmosphere; stirring of Fe-complex and PhLi (-78°C, 1 h), MeIaddn., stirring (-78°C, 0.5 h; then room temp., 2 h); filtration off of Ph4Sn, solvent removal, chromy. (silicic acid, pentane); isomer mixt. not sepd., total yield 63percent;