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Beilstein J. Org. Chem. 2013, 9, 2537–2543, doi:10.3762/bjoc.9.288
Graphical Abstract
Scheme 1: Intermolecular O-addition to alkynes: challenge and opportunity.
Scheme 2: Acid as the critical additive for optimal performance.
Scheme 3: Reactions of internal alkyne and other O-nucleophiles. Isolated yields are given in paranthesis. aA...