Selective Synthesis of Unsymmetrical Diboryl PtII and Diaminoboryl CuI Complexes by B–B Activation of Unsymmetrical Diboranes(4) {pinB–B[(NR)2C6H4]}

摘要: Diaminoboryl ligands are currently intensively investigated because of their unique coordination chemical properties, for example, as part pincer ligands. Owing to synthetic restrictions, however, access diaminoboryl complexes is limited. Unsymmetrical diborane(4) derivatives comprising a dialkoxy- and diaminoboron moiety provide efficient either by oxidative addition or σ-bond metathesis reactions. Especially, the latter complementary existing methods overcomes limitations. This illustrated modular synthesis four unsymmetrical application in selective preparation unprecedented diboryl PtII well sterically little encumbered CuI complexes.