Stereoconvergent Synthesis of Chiral Allylboronates from an E/Z Mixture of Allylic Aryl Ethers Using a 6‐NHC—Cu(II) Catalyst.

The six-membered N-heterocyclic carbene-copper complex IQC catalyzes the asymmetric borylation of both the (E)- and (Z)-isomer of an allylic m-nitrophenyl ether to give the α-substituted allylboronate with the same absolute configuration.