72343-06-7Relevant articles and documents
Design, synthesis and anti-tuberculosis activity of hydrazones and N-acylhydrazones containing vitamin B6 and different heteroaromatic nucleus
Nogueira, Thais Cristina Mendon?a,Cruz, Lucas Dos Santos,Louren?o, Maria Cristina,de Souza, Marcus Vinicius Nora
, p. 792 - 798 (2019/08/27)
Background: The term vitamin B6 refers to a set of six compounds, pyridoxine,pyridoxal,and pyridoxamine and their phosphorylated forms, among which pyridoxal 5′-phosphate (PLP) is the most important and active form acting as a critical cofactor
Dioxovanadium(V) complexes of ONO donor ligands derived from pyridoxal and hydrazides: Models of vanadate-dependent haloperoxidases
Maurya, Mannar R.,Agarwal, Shalu,Bader, Cerstin,Rehder, Dieter
, p. 147 - 157 (2007/10/03)
[VO(acac)2] reacts with H2L [H2L are the hydrazones H2pydx-inh (I), H2pydx-nh (II), or H 2pydx-bhz (III); pydx = pyridoxal, inh = isonicotinohydrazide, nh = nicotinohydrazide, bhz = benzohydrazide] in dry methanol to yield the oxovanadium(IV) complexes [VOL] (H2L = I: 1; H2L = II: 4) or [VO(pydx-bhz)]. These complexes, when exposed to air, convert into the corresponding dioxovanadium(V) complexes [VO2HL] (H2L = I: 2; H2L = II: 5; H2L = III: 7). Aqueous solutions of vanadate and the ligands at pH = 7.5 give rise to the formation of [K(H 2O)3][VO2(pydx-inh)] (3), [K(H 2O)2][VO2(pydx-nh)] (6) and [K(H 2O)2][VO2(pydx-bhz)] (8). Treatment of 6 and 8 with H2O2 generates the oxo(peroxo)vanadium complexes [VO(O2)L] (H2L = II: 9; H2L = III: 10). Complexes 9 and 10 are capable of transferring an oxo group to PPh3. Acidification of 8 with HCl afforded a hydroxo(oxo) complex. The crystal and molecular structures of ligand I and complex 3 have been solved by single-crystal X-ray diffraction. In the anion 3, the vanadium atom is in a distorted tetragonal-pyramidal environment (τ = 0.23). The K+ ion is coordinated to four water molecules (two of which bridge to a neighbouring K+ ion), the pyridine nitrogen atom of an isonicotinic moiety, the equatorial oxo group of the VO2+ fragment, and the alcoholic group of the pyridoxal moiety, which links adjacent layers in the three-dimensional lattice network. In the presence of KBr/H2O 2, the anionic complexes 3, 6 and 8 catalyse the oxidative bromination of salicylaldehyde in water to 5-bromosalicylaldehyde in ca. 40% yields with ca. 87% selectivity. Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2005.
ETUDE INFRAROUGE DU PYRIDOXAL ISONICOTINOYLE HYDRAZONE ET DE COMPOSES ANALOGUES
Colonna, C.,Cosse-Barbi, A.,Massat, A.,Abdelmoumene, R. Ben,Doucet, J. P.
, p. 411 - 430 (2007/10/02)
Infrared spectra have been obtained for pyridoxal isonicotinoyl hydrazone, pyridoxal benzoyl hydrazone, salicylaldehyde isonicotinoyl hydrazone and salicylaldehide benzoyl hydrazone.Vibrational assignements are proposed mainly in the 2000-1200 cm-1/
