An amino-linked nitrogen heterocyclic carbene (amino-NHC), 1-tBu, has been shown to mediate carbon–carbon coupling through the direct C–H functionalization of benzene and pyridine in the absence of a metal catalyst. Using EPR, the first spectroscopic evidence corroborating the single electron transfer mechanism for the metal-free carbon–carbon coupling manifold, as reported by others, is introduced.
一种
氨基链接的氮杂环卡宾(
氨基-NHC),1-tBu,已被证明能够通过直接对苯和
吡啶进行C–H功能化,促进碳–碳偶联,且不需要
金属催化剂。通过电子顺磁共振(EPR),首次引入了光谱证据,证实了无
金属碳–碳偶联机理的单电子转移机制,这一发现得到了其他研究的支持。