Iridium‐Catalyzed Regio‐ and Enantioselective Borylation of Unbiased Methylene C(sp3)‐H Bonds at the Position Beta to a Nitrogen Center
2020
Reported herein is the pyrazole-directed iridium-catalyzed enantioselective borylation of unbiased methylene C-H bonds at the position β to a nitrogen center. The combination of a chiral bidentate boryl ligand, iridium precursor, and pyrazole directing group was responsible for the high regio- and enantioselectivity observed. The method tolerated a vast array of functional groups to afford the corresponding C(sp3 )-H functionalization products with good to excellent enantioselectivity.
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