《A conjugated microporous polymer as a recyclable heterogeneous ligand for highly efficient regioselective hydrosilylation of allenes》 was written by Jiang, Ya-Nan; Zeng, Jia-Hao; Yang, Ying; Liu, Zhi-Kai; Chen, Jun-Jia; Li, Ding-Chang; Chen, Li; Zhan, Zhuang-Ping. Electric Literature of C5H3Br2N And the article was included in Chemical Communications (Cambridge, United Kingdom) in 2020. The article conveys some information:
Pyridines containing adjacent CC bonds were utilized as ligand units and integrated into the skeleton of conjugated microporous polymers. The resultant Pd-CMP-1 was first applied as a highly efficient heterogeneous catalytic system for Pd-catalyzed allene hydrosilylation towards a wide range of allenes to produce branched allylsilanes with high regioselectivity. The ligand units of the polymer, along with the confinement effect of the porous structure, jointly regulated the regioselectivity. The parts-per-million (ppm) levels of Pd, coordinated with the recyclable heterogeneous ligand, show promise for industrial applications. This work opens a new front of using CMP as an intriguing platform for developing highly efficient catalysts to control the regioselectivities in allene hydrosilylation. The results came from multiple reactions, including the reaction of 2,6-Dibromopyridine(cas: 626-05-1Electric Literature of C5H3Br2N)
2,6-Dibromopyridine(cas: 626-05-1) belongs to pyridine. Pyridines form stable salts with strong acids. Pyridine itself is often used to neutralize acid formed in a reaction and as a basic solvent. Electric Literature of C5H3Br2N