The catalytic activity of iridium-mediated transfer hydrogenation is readily tuned by electronic variation of the ligated tetraaryl-N-heterocyclic carbene and the installation of electron donating groups on the N-aryl substituents is more important than on the C-aryl substituents for effecting catalytic enhancement.
铱介导的转移氢化反应的催化活性可以通过配位的四芳基N-杂环卡宾的电子变化来轻松调节,而在N-芳基取代基上安装供电子基团对于提升催化效果比在C-芳基取代基上更为重要。