Fortier Skye, Gomez-Torres Alejandra
Department of Chemistry and Biochemistry, University of Texas at El Paso, El Paso, TX 79968, USA.
Chem Commun (Camb). 2021 Oct 7;57(80):10292-10316. doi: 10.1039/d1cc02772g.
Titanium is a versatile metal that has important applications in practical synthesis, though this is typically limited to stoichiometric reactions or Lewis acid catalysis. Recently, interest has grown in using titanium and other early-metals for redox catalysis; however, notable limitations exist due to the thermodynamic preference of these metals to adopt high oxidation states. Nonetheless, discrete low-valent titanium (LVT) complexes and their synthons (titanium complexes which chemically behave as LVT sources) are known. Here, we detail the various ligand platforms that are capable of stabilizing LVT compounds and present the redox chemistry of these systems. This includes a discussion of recent developments in the use of LVT synthons for accessing fully reversible oxidative-addition/reductive-elimination reactions.
钛是一种用途广泛的金属，在实际合成中有着重要应用，不过这通常局限于化学计量反应或路易斯酸催化。最近，使用钛和其他早期金属进行氧化还原催化的兴趣日益增长；然而，由于这些金属倾向于采用高氧化态的热力学偏好，存在显著局限性。尽管如此，离散的低价钛（LVT）配合物及其合成子（在化学行为上作为LVT源的钛配合物）是已知的。在此，我们详细介绍了能够稳定LVT化合物的各种配体平台，并展示了这些体系的氧化还原化学。这包括对使用LVT合成子实现完全可逆的氧化加成/还原消除反应的最新进展的讨论。
