Regioselectivity in the palladium-catalysed allylic alkylation of 1-arylprop-2-enyl acetates [ArCH(OAc)CH![[double bond, length half m-dash]](https://www.rsc.org/images/entities/char_e006.gif)
CH2] or (E)-3-phenylprop-2-enyl acetate (PhCHCHCH2OAc) with sodium enolates of soft carbon nucleophiles is controlled by addition of a catalytic amount of lithium iodide to give lienar products [(E)-ArCHCHCH2Nu] exclusively; their branch isomers [ArCH(Nu)CHCH2] were not detected.
M. Kawatsura, Y. Uozumi and T. Hayashi, Chem. Commun., 1998, 217 DOI: 10.1039/A707652E
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