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Butylation problems ironed out: 3‐Pentynyl ethers react with butyllithium at −20°C in toluene, upon addition of a catalytic amount of a cheap iron(III) salt, to afford (E)‐4‐methyl‐3‐octenyl ethers in high yields. Stereochemically defined tetrasubstituted alkenes were also obtained by the subsequent addition of electrophiles (E+, see scheme; acac = acetylacetonate, Bn=benzyl).

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A new chiral ferrocenylphosphine ligand, which has C2-symmetric structure and a functional group on the side chain, was prepared by ortho-lithiation and phosphination of 1,l '-bis[l-(N,N-dimethylamino)ethyl]ferrocene followed by optical resolution of the ditartrate salts and was found to be effective for palladium-catalysed asymmetric cross-coupling of 1 -phenylethylzinc chloride with vinyl bromide giving 3-phenylbut-1-ene of over