Dialkylacetylenes RC![[triple bond, length half m-dash]](https://www.rsc.org/images/entities/char_e007.gif)
CR (R = Et or Prn) react with aryl iodides in the presence of nickel halides, zinc powder and pyridine to give unsymmetrical biaryls 1 and 2 in moderate yields.
K. Kong and C. Cheng, J. Chem. Soc., Chem. Commun., 1991, 423 DOI: 10.1039/C39910000423
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