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. Author manuscript; available in PMC: 2022 Apr 5.
Published in final edited form as: Org Lett. 2021 Mar 30;23(8):2873–2877. doi: 10.1021/acs.orglett.1c00479

Figure 1.

Figure 1.

Proposed mechanism of bimetallic reaction where copper is oxidized by oxygen which in turn oxidizes Pd(0) to Pd(II) (adapted from previous literature).13 The aryl group is transmetalated to palladium. Subsequently, the Pd(II) forms the biaryl dimer through reductive elimination. Palladium(0) is oxidized by copper(I) to restart the catalytic cycle. The Cu ligands (L) would be combinations of acetic acid, water, and DMSO.