Whereas the reaction of simple octa-1,7-diynes is fruitless, those bearing ester groups on the terminal positions react with alkynols in the presence of stoichiometric amounts of a nickel(0) reagent derived from NiCl2(PPh3)2 and BunLi to give tetralin lactones in moderate to good yields.
P. Bhatarah and E. H. Smith, J. Chem. Soc., Chem. Commun., 1991, 277 DOI: 10.1039/C39910000277
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