Well-defined arylâCuIII species undergo rapid reductive elimination upon reaction with phenolates (PhOâ), to form arylâOPh cross-coupling products. Kinetic studies show that the reaction follows a different mechanistic pathway compared to the reaction with phenols. The pH active cyclized pincer-like ligand undergoes an initial amine deprotonation that triggers a faster reactivity at room temperature. A mechanistic proposal for the enhanced reactivity and the role of EPR-detected CuII species will be discussed in detail.
明确的芳基-CuIII 物种在与
酚盐 (PhO-) 反应后经历快速还原消除,形成芳基-OPh 交叉偶联产物。动力学研究表明,与
酚类反应相比,该反应遵循不同的机制途径。 pH 活性环化钳状
配体经历初始胺去质子化,在室温下引发更快的反应性。将详细讨论增强反应性的机制建议以及 EPR 检测到的 CuII 物质的作用。