Department of Chemistry, Tokyo Institute of Technology, O-okayama, Meguro-ku, Tokyo, 152-8551, Japan.
Chemistry. 2019 Oct 22;25(59):13504-13508. doi: 10.1002/chem.201903625. Epub 2019 Sep 24.
By using a nickel complex with an N-phosphinomethyl-N-heterocyclic carbene ligand (NHC-P), the reducing ability and thermal stability of the complex were improved considerably compared to the previously reported bipyridine and bisphosphine complexes, and acrylate salt was prepared from ethylene and CO with the highest TON ever reported for nickel systems even without using metallic zinc. Oxidative cyclization of ethylene and CO on the NHC-P nickel complex was found to proceed very rapidly compared to previous systems.
使用一种带有 N-膦甲基-N-杂环卡宾配体（NHC-P）的镍配合物，与之前报道的联吡啶和双膦配合物相比，该配合物的还原能力和热稳定性得到了显著提高，并且即使不使用金属锌，也能以镍体系有记录以来的最高 TON 从乙烯和 CO 制备丙烯酸盐。与之前的体系相比，发现乙烯和 CO 在 NHC-P 镍配合物上的氧化环化反应进行得非常快。
