3722-13-2Relevant articles and documents
Synthesis and Pharmacological Investigations of Novel Pyrazolyl and Hydrazonoyl Cyanide Benzimidazole Entities
Khalifa, Mohamed E.,Gobouri, Adil A.,Kabli, Fahad M.,Altalhi, Tariq A.,Almalki, Abdulraheem S. A.,Elemshaty, Amira M.
, p. 1426 - 1436 (2019/04/17)
Various novel benzimidazole entities linked to pyrazolyl and hydrazonoyl cyanide substrates carrying aryl and heteroaryl groups (8a–e to 10a–e) were synthesized using new route syntheses and were focused on their pharmacological evaluation as one of the m
Nano-CuFe2O4-supported sulfonic acid as a novel and recyclable nanomagnetic acid for diazotization of aromatic amines: efficient synthesis of various azo dyes
Nemati, Firouzeh,Elhampour, Ali,Natanzi, Mahshid B.,Sabaqian, Samaneh
, p. 1045 - 1054 (2016/05/02)
Abstract: A novel heterogeneous sulfonic acid functionalized nanomagnetic CuFe2O4 was successfully prepared and characterized by analyzing different obtained data including Fourier transform infrared spectroscopy, X-ray powder diffraction, field emission scanning electron microscopy, energy-dispersive X-ray spectroscopy, thermogravimetric analysis, dynamic light scattering and vibrating sample magnetometer. Then the novel acidic reagent was examined in synthesis of various azo-containing compounds from coupling of aryl diazonium ferrite sulfate salts with aromatic and non-aromatic compounds. The procedure starts by diazotization of aromatic amines with NaNO2 and wet CuFe2O4–SO3H and then coupling reaction of aryl diazonium ferrite sulfate salts with appropriate reagent. The prepared nano-solid acid showed high activity in synthesis of variety of aryl diazonium salts. In addition the as-prepared aryl diazonium ferrite sulfate salts are stable at room temperature for many hours and reacted efficiently in coupling reactions of aryl diazonium salts. All the azo dyes are synthesized in high yields and simple reaction conditions at room temperature. Moreover, the nanomagnetic solid acid was easily recovered from the reaction mixture and reused five runs without significant loss of activity. Graphical Abstract: [Figure not available: see fulltext.]
Synthesis and characterization of Ni(II) and Cd(II) complexes of 4-(4-nitrophenylazo)- 1H-pyrazole-3,5-diamine and 4-(4-methylphenylazo)-1H- pyrazole-3,5-diamine
Adiguzel, Ragip,Esener, Hasan,Ergin, Zuhal,Aktan, Ebru,Turan, Nevin,Sekerci, Memet
scheme or table, p. 2795 - 2800 (2012/01/30)
In this study, the diazotized p-nitroaniline and p-methylaniline were coupled with malononitrile. The ring closure reaction of the obtained products with hydrazine monohydrate yielded 4-(4-methylphenylazo)-1H-pyrazole-3,5-diamine (L1) and 4-(4-nitrophenylazo)-1H-pyrazole- 3,5-diamine (L 2). The structure of the ligands has been elucidated by spectroscopic analyses. Then, novel Ni(II) and Cd(II) complexes of the ligands have been synthesized and the structures of these complexes determined by elemental analysis, spectrometric and TGA/DTA methods, molar conductance and magnetic susceptibility measurements. All the complexes were monomeric and diamagnetic. From the elemental analyses and mass spectra data, the complexes were proposed to the formulae [Ni2(L1)2(OH) 2]·2Cl·8.5H2O, [Cd2(L 1)2(OH)2]·2Cl·DMF·3H2O, [Ni(L2)2]·2Cl·2DMF·7H2O and [Cd2(L2)2(OH)2(H 2O)4]·2Cl·1.5H2O. For the Cd(L2) complex octahedral geometry was proposed, but the Ni(L 1), Ni(L2) and Cd(L1) complexes show four coordinated structure. The Ni(L1), Cd(L1) and Cd(L 2) complexes were found to be dinuclear. On the other hand the Ni(L2) complex was found to be mononuclear. All the complexes were found to be (1:2) electrolytes.
