Recommanded Product: 626-05-1In 2022 ,《Synthesis and Structural Properties of NIR-Absorbing Pyridine-Containing Heptaphyrins》 was published in Chemistry – An Asian Journal. The article was written by Rawat, Nisha; Sinha, Avisikta; Ravikanth, Mangalampalli. The article contains the following contents:
Four examples of stable nonaromatic pyridine containing heteroheptaphyrins (pyrithiaheptaphyrins) 2-5 were synthesized in 8-13% yields by [5+2] condensation of newly synthesized pyridine-based pentapyrrane 8 and bithiophene diol 9 a-d. The X-ray crystallog. anal. of macrocycle 2 proved that the macrocycle assumes a highly planar structure with two inverted thiophene rings. The heteroheptaphyrins 2-5 are asym. and showed a greater number of resonances in 1H NMR spectra compared to our previously reported sym. heterohexaphyrin (pyrithiahexaphyrin) 1 c. Most of the macrocyclic core protons in pyrithiahepaphyrins 2-5 experienced upfield/downfield shifts compared to pyrithiahexaphyrin 1 c indicating the alteration of π-conjugation in the macrocycles. The absorption bands were significantly red-shifted and located in the NIR region in macrocycles 2-5 compared to 1 c supporting the increase of π-delocalization. The theor. studies support the exptl. findings and NICS(0) value supports the non-aromaticity of the macrocycles. In the experimental materials used by the author, we found 2,6-Dibromopyridine(cas: 626-05-1Recommanded Product: 626-05-1)
2,6-Dibromopyridine(cas: 626-05-1) belongs to pyridine. Pyridines, quinolines, and isoquinolines have found a function in almost all aspects of organic chemistry. Pyridine has found use as a solvent, base, ligand, functional group, and molecular scaffold. As structural elements, these moieties are potent electron-deficient groups, metal-directing functionalities, fluorophores, and medicinally important pharmacophores. Recommanded Product: 626-05-1