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Beilstein J. Org. Chem. 2013, 9, 1763–1767, doi:10.3762/bjoc.9.204
Graphical Abstract
Figure 1: Benzofurans in bioactive compounds and materials.
Scheme 1: Zinc–gold catalyzed C2-alkynylation of benzofurans.
Scheme 2: Scope of the reaction.
Scheme 3: Alkynylation of 7-methoxybenzofuran (7j) [31].
Scheme 4: Alkynylation of 8-methoxypsoralen (2).