Stabilization of transition metal complexes for catalysis in diverse environments
申请人:——
公开号:US20040122189A1
公开(公告)日:2004-06-24
This present invention is directed towards the identification or design, preparation, and use of suitable transition metal complexes for use as catalysts. The transition metal complexes may comprise heterodonor ligands. The present invention is also directed toward a method of determining the suitability of a transition metal complex for use in a catalytic reaction, such as, but not limited to, atom transfer radical polymerization (“ATRP”), atom transfer radical addition (“ATRA”), atom transfer radical cyclization (“ATRC”), and other catalytic redox reactions. The method assists in the approximate determination of the fundamental properties of the transition metal complex in a reaction media, such as, but not limited to, solubility, redox potential, stability towards acidic, basic, or ionic species, conditional radically transferable atom phylicity, and propensity toward disproportionation and therefore, the suitability of the complex to be used as a catalyst in the reaction media. The method provides a basis for prediction and evaluation of the properties of a transition metal complex for a particular selective catalytic reaction in a broad range of reaction environments. An understanding of the principles of the disclosed method allows a transition metal complex to be tuned to specific reaction medium by selecting a transition metal complex and ligand combination having the desired qualities.
本发明旨在确定或设计、制备和使用用作催化剂的合适过渡金属配合物。过渡金属络合物可包括杂配体配体。本发明还涉及一种确定过渡金属配合物是否适合用于催化反应的方法,例如但不限于原子转移自由基聚合反应("ATRP")、原子转移自由基加成反应("ATRA")、原子转移自由基环化反应("ATRC")和其他催化氧化还原反应。该方法有助于近似确定过渡金属络合物在反应介质中的基本性质,如但不限于溶解性、氧化还原电位、对酸性、碱性或离子性物质的稳定性、有条件的可自由基转移原子的物理性和歧化倾向,从而确定络合物在反应介质中用作催化剂的适宜性。该方法为预测和评估过渡金属配合物在广泛的反应环境中进行特定选择性催化反应的性质提供了依据。了解了所公开方法的原理,就可以通过选择具有所需品质的过渡金属络合物和配体组合来调整过渡金属络合物以适应特定的反应介质。