4930-98-7Relevant articles and documents
Tridentate hydrazone metal complexes derived from cephalexin and 2-hydrazinopyridine: Synthesis, characterization and antibacterial activity
Anacona,Rincones, Maria
, p. 169 - 175 (2015)
Metal(II) coordination compounds of a tridentate hydrazone ligand (HL) derived from the condensation of cephalexin antibiotic with 2-hydrazinopyridine were synthesized. The hydrazone ligand and mononuclear [ML(OAc)(H2O)] (M(II) = Mn, Co, Ni, Cu, Zn, Ag) complexes were characterized by several techniques, including elemental and thermal analysis, molar conductance and magnetic susceptibility measurements, electronic, FT-IR, EPR and 1H NMR spectral studies. The cephalexin 2-pyridinylhydrazone ligand HL behaves as a monoanionic tridentate NNO chelating agent. The biological applications of complexes have been studied on three bacteria strains (Escherichia coli, Acinetobacter baumannii and Enterococcus faecalis) by agar diffusion disc method.
Synthesis of Hydrazinylpyridines via Nucleophilic Aromatic Substitution and Further Transformation to Bicyclo[22.2]octenes Fused with Two N -Aminosuccinimide Moieties
Ekar, Jernej,Kranjc, Kri?tof
, p. 1112 - 1120 (2020/10/29)
Efficient and reliable synthesis of substituted hydrazinylpyridines in thick-wall ACE tubes via nucleophilic substitution of a chlorine substituent in different chloropyridines is presented. Hydrazine hydrate and alkylhydrazines were used as nucleophiles and simple alcohols and diethyl ether were the only organic solvents necessary, making the process environmentally and user friendly, potentially reaching 100% atomic efficiency. In the next step, transformations of succinic anhydride moieties fused to the bicyclo[2.2.2]octene framework into succinimide moieties via nucleophilic substitution of oxygens were conducted. As nucleophiles two of the synthesized hydrazinylpyridines (2-hydrazinyl-3-nitropyridine and 2-hydrazinyl-5-nitropyridine) and also hydrazine hydrate, phenylhydrazine, and 4-nitrophenylhydrazine were used. Reactions were again carried out in ACE tubes and only simple alcohols, diethyl ether, and acetone were needed as solvents. One of the prepared bicyclo[2.2.2]octene adducts displayed water solubility thus being a promising candidate for future studies as a novel bidentate ligand for various metal cations in aqueous solutions or acting as an unprecedented halogen bond acceptor.
PROCESS FOR THE SYNTHESIS OF (3-CHLORO-2-PYRIDYL)HYDRAZINE
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Paragraph 0061-0063, (2021/05/29)
Described herein are novel methods of synthesizing (3-chloro-2-pyridyl)hydrazine. Compounds prepared by the methods disclosed herein are useful for preparation of certain anthranilamide compounds that are of interest as insecticides, such as, for example, the insecticides chlorantraniliprole and cyantraniliprole.
ASK1 inhibitor and applications thereof
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Paragraph 0155; 0157-0159, (2020/06/17)
The invention relates to the technical field of medicines, specifically to a compound represented by a formula (I), a pharmaceutically acceptable salt, ester or stereoisomer thereof, a pharmaceuticalcomposition and a preparation containing the compound, the pharmaceutically acceptable salt, the ester or the isomer thereof, a method for preparing the compound, the pharmaceutically acceptable salt,the ester or the isomer thereof, and applications of the compound, the pharmaceutically acceptable salt, the ester or the isomer thereof in preparation of drugs for treating and/or preventing ASK1-mediated diseases and related diseases.
