trans-Alkenylalanes, readily obtainable via hydroaluminiation of acetylenes, react readily with aryl bromides and iodides in the presence of catalytic amounts of nickel complexes, such as tetrakis(triphenylphosphine)- nickel, to produce arylated alkenes in high yields, the stereochemistry of the products being >99%trans.
E. Negishi and S. Baba, J. Chem. Soc., Chem. Commun., 1976, 596b DOI: 10.1039/C3976000596B
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