Regioselective hydroboration of terminal and internal alkynes is realized by using 10 mol% copper powder (0.3–1 μm) at room temperature. 24 alkynes were efficiently converted into vinylboronates in up to 96% yield without addition of any ligand or additive.
J. Zhao, Z. Niu, H. Fu and Y. Li, Chem. Commun., 2014, 50, 2058 DOI: 10.1039/C3CC48670B
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