N→B stabilized and simplified synthesis for multi-functional boron-containing biodegradable poly(ε-caprolactone) and poly(L-lactide) polymers was written by Soylemez, Rahime;Uyar, Zafer;Degirmenci, Mustafa;Kilic, Ahmet. And the article was included in Materials Today Communications in 2022.HPLC of Formula: 626-64-2 This article mentions the following:
In this study, tri-coordinated boron-based biodegradable poly(ε-caprolactone) (PCL) and poly(L-lactide) (PLLA) polymers with well-defined structures and their tetra-coordinated forms containing (B←N) coordination bonds were synthesized. First, a novel boronate ester compound (1) with two terminal hydroxyl groups was prepared by the esterification of 4-(hydroxymethyl)phenylboronic acid with pentaerythritol. Then, this boronate ester compound (1) was used as the initiator in the ring-opening polymerization of ε-caprolactone (ε-CL) and -lactide (LLA) to synthesize tri-coordinated boron-containing poly(ε-caprolactone) (PCL-B) (2) and poly(L-lactide) (PLLA-B) (3) polymers, resp. Finally, a total of six tetra-coordinated boron-containing biodegradable PCL and PLLA were prepared from the corresponding tri-coordinated boron polymers by introducing three N-donor ligands, namely 4-dimethylamino pyridine, 4-hydroxy pyridine, and 4,4′-bipyridine. The newly synthesized boron compounds were characterized by elemental and NMR (1H, 13C, and 11B), FT-IR, UV-Vis, and LC-MS/MS spectroscopic analyses. The thermal and morphol. behaviors of the boron polymers were studied by TG-DTA, DTG, and SEM techniques. The fluorescence properties of the tri- and tetra-coordinated boron polymers were examined by fluorescence spectroscopy. In the experiment, the researchers used many compounds, for example, Pyridin-4-ol (cas: 626-64-2HPLC of Formula: 626-64-2).
Pyridin-4-ol (cas: 626-64-2) belongs to pyridine derivatives. Pyridine is diamagnetic and has a diamagnetic susceptibility of â?8.7 à 10â? cm3·molâ?.The molecular electric dipole moment is 2.2 debyes. The standard enthalpy of formation is 100.2 kJ·molâ? in the liquid phase and 140.4 kJ·molâ? in the gas phase. Pyridine derivatives are also useful as small-molecule α-helix mimetics that inhibit protein-protein interactions, as well as functionally selective GABA ligands.HPLC of Formula: 626-64-2