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A transition‐metal‐free, selenium mediated electrophilic cyclization reaction was realized through a one‐pot procedure between simple alkynes and triflic anhydride‐activated selenoxides to give selenium containing dihydronaphthalene products. This method gave good to very high yields for all products, including selenium‐substituted phenanthrene, dihydroquinoline, 2H‐chromene, and coumarin, which can be further transformed to other functionalized compounds.
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An et al. (2021) studied this question.
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