14237-71-9Relevant articles and documents
Chelating behavior of 3-amino-4,6-dimethyl-1H-pyrazolo[3,4-b]pyridine ligand towards some metal ions, spectral and thermal measurements as well as molecular modeling and biological studies
Masoud, Mamdouh S.,AbouEl-Enein, Saeyda A.,Ali, Alaa E.,Abd Elhamed, Eman H.
, (2020)
The 3-amino-4,6-dimethyl-1H-pyrazolo [3,4-b]pyridine ligand and its Mn(II), Pd(II), Fe(III), Cr(III), Ru(III), Hf(IV), Zr(IV) and UO2(II) metal complexes were synthesized and characterized by means of elemental analysis, spectral studies and thermal investigation. Also, the theoretical studies that done by Spartan ‘14 V1.1.4 software supported the experimental studies. The infrared data suggest that the ligand coordinates to the metal ions as a neutral monodentate moiety through nitrogen atom of amino group. The complexes are formed with 1:2 and 1:3 (M:L) molar ratios. All complexes possesses octahedral geometry except the Pd(II) complex that presents a square planar geometry. Thermal analyses (TGA and DTG) of ligand and its metal complexes are performed in order to identify the external solvents molecules and thermal stability ranges of the complexes. The X-ray diffraction studies suggest orthorhombic structure of P type lattice for Pd(II) complex and monoclinic structure of P type lattice for Cr(III) and Zr(IV). Theoretical calculations are performed to corroborate the experimental results. Some theoretical parameters are reported in order to compare the reactivity of the compounds. The cytotoxic activity of the ligand and its Pd(II) and Ru(III) complexes is evaluated against breast MCF-7 cell line. Pd(II) complex presents a higher activity. The synthesized ligand and its Pd(II), Cr(III) and Zr(IV) metal complexes also are screened for antibacterial activity. The ligand and its tested complexes has weak activity towards a Gram-positive bacteria and no activity towards Gram-negative bacteria except Pd(II) complex.
Synthesis and antitumor evaluation of some new fused and binary pyridines
Waly, Mohamed A.,El-Hawary, Ibrahim I.,Hamama, Wafaa S.,Zoorob, Hanafi H.
, p. E12-E17 (2013)
Syntheses of some new heterocyclic compounds containing pyridone, thioxopyridine, halogenated-pyridine-carbonitriles, pyrazolopyridine, and pyridine derivatives were achieved. Besides, a modified synthetic method for the synthesis of 2-chloro-4,6-dimethyl-nicotinonitrile () through the reaction of acetylacetone and malononitrile as starting materials was implemented. The reaction of 2-chloronicotinonitrile with substituted amines to 2-aminonicotinonitrile were also investigated. Fused or binary pyridines were tested for cytotoxicity against well-known established model Ehrlich ascites cells in vitro. Compound exhibited a high antitumor activity compared with 5-fluorouracil.
Synthesis and antibacterial survey of some new pyridine-based heterocycles
Abdel-Galil, Ebrahim,Abdel-Latif, Ehab,Berghot, Moged A.,Zaki, Alshimaa I.
, p. 1883 - 1901 (2020/11/19)
Treatment of ethyl 2-((3-cyano-4,6-dimethylpyridin-2-yl)thio)acetate (4) with hydrazine hydrate furnished 2-((3-cyano-4,6-dimethylpyridin-2-yl)thio)-acetohydrazide (5) which underwent condensation with five benzaldehydes to afford the corresponding N'-arylidene-2-((3-cyano-4,6-dimethylpyridin-2-yl)thio)acetohydrazides 6a-e. The reaction of hydrazide 5 with ethyl acetoacetate yielded the expected 2-((2-(3-methyl-5-oxo-pyrazolyl)-2-oxoethyl)thio)nicotinonitrile derivative 7 which diazo-coupled with different diazonium chlorides to furnish the corresponding 2-(4-(2-arylhydrazono)pyrazolyl)-2-oxoethyl)thio)nicotinonitriles 8a-c. In addition, the nucleophilic substitution of chlorine from 2-chloroacetamide derivative 16 by various types of nucleophiles (salicylaldehyde, ethyl thioglycolate, 2-mercaptobenzoxazole, ammonium thiocyanate and/or malononitrile) was investigated. In general, all synthesized pyridine scaffolds revealed better activity against the Gram-positive bacterium (Bacillus subtilis) rather than the Gram-negative bacterium (Escherichia coli).
Synthesis and characterization of some azo-heterocycles incorporating pyrazolopyridine moiety as disperse dyes
Gaffer, Hatem E.,Khattab, Tawfik A.
, p. 41 - 47 (2018/07/03)
IN for THIS the synthesis research of paper, some we pyrazolopyridine used 3-aminopyrazolo[3,4- azo compounds. b]pyridine The as key key starting intermediate fused heterocyclic 3-aminopyrazolo[3,4-b]pyridine is prepared by the reaction of 2-chloro-4,6-dimethylnicotinonitrile with hydrazine hydrate. The azo-coupling reaction of the pyrazolopyridinyl diazonium salt with a variety of coupling agents such as β-naphthylamine, β-naphthol, thiazole, and aniline derivatives afforded the corresponding arylazopyrazolo[3,4-b] pyridine derivatives in relatively high yield. The chemical structures were established using FTIR, elemental analysis (C, H, N), and 1H-NMR, 13C-NMR. The prepared arylazopyrazolo[3,4-b] pyridine disperse dyes were applied to dye polyester garments to provide good color fastness properties.