Treatment of the borate complexes derived from bis-(1,2-dimethylpropyl)alkenylboranes and alkynyl-lithiums with iodine and sodium hydroxide produces in a highly stereoselective (> 99%) manner conjugated trans-enynes readily convertible into the corresponding cis,trans-dienes.
E. Negishi, G. Lew and T. Yoshida, J. Chem. Soc., Chem. Commun., 1973, 874 DOI: 10.1039/C39730000874
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