Imidazolium-Based Ionic Liquid: An Efficient, Normalized, and Recyclable Platform for Rh(III)-Catalyzed Directed C-H Carbenoid Coupling Reactions was written by Zhang, Chen;Chen, Xiao-Mei;Luo, Yi;Li, Jiang-Lian;Chen, Min;Hai, Li;Wu, Yong. And the article was included in ACS Sustainable Chemistry & Engineering in 2018.Reference of 4373-61-9 This article mentions the following:
The ionic liquid [BMIM][NTf2] was developed as an ideal medium in which Rh(III)-catalyzed directed C-H carbenoid coupling reactions can be conducted efficiently and sustainably. More significantly, the ionic liquid can not only achieve the recycle of catalyst system but also improve the efficiency of catalyst, presenting that carbenoid coupling reactions can be accomplished at room temperature within a short period of time. Thus, this work would be useful in expanding applications of C-H activation strategies as tools for assembling novel organic mols. In the experiment, the researchers used many compounds, for example, 2-(m-Tolyl)pyridine (cas: 4373-61-9Reference of 4373-61-9).
2-(m-Tolyl)pyridine (cas: 4373-61-9) belongs to pyridine derivatives. Pyridine’s the lone pair does not contribute to the aromatic system but importantly influences the chemical properties of pyridine, as it easily supports bond formation via an electrophilic attack. Many analogues of pyridine are known where N is replaced by other heteroatoms . Substitution of one C–H in pyridine with a second N gives rise to the diazine heterocycles (C4H4N2), with the names pyridazine, pyrimidine, and pyrazine.Reference of 4373-61-9