A nickel(0) catalyst, which was generated from bis(cyclo-octadiene)nickel and bis(diphenylphosphino)butane, effected a novel co-oligomerization of three molecules of ethoxy(trimethylsilyl)ethyne with one molecule of carbon dioxide to afford the title compound (2) in an excellent yield.
T. Tsuda, N. Hasegawa and T. Saegusa, J. Chem. Soc., Chem. Commun., 1990, 945 DOI: 10.1039/C39900000945
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