Catalytic Formation of Cyclic Carbonates using Gallium Aminotrisphenolate Compounds and Comparison to their Aluminium Congeners: A Combined Experimental and Computational Study
作者:Lucía Álvarez‐Miguel、Jesús Damián Burgoa、Marta E. G. Mosquera、Alex Hamilton、Christopher J. Whiteoak
DOI:10.1002/cctc.202100910
日期:2021.10.7
of gallium aminotrisphenolate compounds as catalysts for the synthesis of cyclic carbonates from epoxides and CO2. The results show that they are highly active, and more so than the corresponding aluminium congeners. The catalyst system is applicable at low and elevated temperatures across a wide substrate scope including terminal, internal, multiple and fully deuterated epoxides. Applying low catalyst
这项工作报告了使用氨基三酚镓化合物作为由环氧化物和 CO 2合成环状碳酸酯的催化剂. 结果表明它们具有高活性,并且比相应的铝同系物活性更高。该催化剂体系适用于低温和高温下的广泛底物范围,包括末端环氧化物、内部环氧化物、多重环氧化物和完全氘化环氧化物。应用低催化剂负载量可以获得 344,000 的 TON,突出了它们的稳定性。DFT 研究证实,与铝同系物相比,镓催化剂具有较低的能量分布。使用 Gutmann-Beckett 方法测量镓和氨基三酚铝化合物的路易斯酸度提供了实验证据,证明镓化合物比其铝同系物更具路易斯酸性。最后,