Copper-Catalyzed Germyl-Azidation of Alkenes with Germanium Hydrides and Trimethylsilyl Azide.

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The incorporation of a germyl group and another functional fragment across the C═C bond is a challenging task due to the prevailing hydrogermylation reaction. Herein, an efficient copper-catalyzed three-component reaction of alkenes, germanium hydrides, and trimethylsilyl azide has been disclosed. This transformation allows the concomitant introduction of germyl and azide groups across the double bonds in a highly regioselective manner with tert-butyl hydroperoxides as the bystanding oxidant. The resulting β-germyl azides could be easily converted into β-germyl amine and 1,2,3-triazoles of significant value.