Salen-based hypercrosslinked polymer-supported Pd as an efficient and recyclable catalyst for C-H halogenation was written by Meng, Di;Bi, Jiajun;Dong, Yahao;Hao, Bo;Qin, Kaiwei;Li, Tao;Zhu, Dajian. And the article was included in Chemical Communications (Cambridge, United Kingdom) in 2020.Quality Control of 2-(m-Tolyl)pyridine This article mentions the following:
The first use of a salen-based hypercrosslinked polymer-supported Pd catalyst to carry out C-H halogenation was reported. This catalyst was effectively catalyze C-H bromination and chlorination even better than its homogeneous counterpart Pd(OAc)2. It also showed excellent reusability without loss of catalytic activity for ten cycles. A broad substrate scope was explored and moderate to excellent yields were obtained. In the experiment, the researchers used many compounds, for example, 2-(m-Tolyl)pyridine (cas: 4373-61-9Quality Control of 2-(m-Tolyl)pyridine).
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. Several pyridine derivatives play important roles in biological systems. While its biosynthesis is not fully understood, nicotinic acid (vitamin B3) occurs in some bacteria, fungi, and mammals.Quality Control of 2-(m-Tolyl)pyridine