Cu–Mg–Al hydroxycarbonate, derived from Cu–Mg–Al hydrotalcite, affords yields of >80% for the heterogeneous coupling of phenylethyne to 1,4-diphenylbuta-1,3-diyne in the presence of sodium hydroxide and oxygen.
S. M. Auer, M. Schneider and A. Baiker, J. Chem. Soc., Chem. Commun., 1995, 2057 DOI: 10.1039/C39950002057
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