Tertiary α-hydroxyalkynes undergo oxidative carbonylation in alcohols in the presence of catalytic amounts of Pdl2–Kl to give β-lactones derived from alkoxycarbonylation at the terminal cabon of the alkyne and cis-carbonylation at the internal carbon, followed by carbonyl trapping by the tertiary hydroxy group.
B. Gabriele, M. Costa, G. Salerno and G. P. Chiusoli, J. Chem. Soc., Chem. Commun., 1994, 1429 DOI: 10.1039/C39940001429
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