A new copper-catalyzed trifluoromethylarylation reaction of alkynes has been developed. The transformation represents the first example of endo-type carbotrifluoromethylation of unsaturated carbon–carbon bonds and provides efficient access to a variety of CF3-substituted dihydronaphthalenes and chromenes.
J. Xu, Y. Wang, T. Gong, B. Xiao and Y. Fu, Chem. Commun., 2014, 50, 12915 DOI: 10.1039/C4CC05692B
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