New NLO active cyclopalladated chromophores in main-chain polymers
摘要:
Four new OH-functionalized orthopalladated complexes bearing an electron-donor and an acceptor group in a trans-like arrangement with respect to the metal have been prepared and characterized. The ligands are Schiff bases, bound as C,N- or N, O-chelating moieties. Four new polyesters were obtained by polycondensation from the monomeric complexes and pentyloxyterephthaloyl chloride. Two "model" complexes, each one related to one monomer, were also synthetized, in order to obtain further and more detailed characterization data, and in particular to perform measurements of mubeta. (C) 2003 Elsevier B.V. All rights reserved.
Microwave-Assisted, Solvent-Free and Parallel Synthesis of Some Novel Substituted Imidazoles of Biological Interest
作者:Gyanendra Kumar Sharma、Devender Pathak
DOI:10.1248/cpb.58.375
日期:——
of some novel substituted imidazoles of biological interest is reported. First, primary aromatic or heteryl amine was condensed with aryl or heteryl aldehydes to afford corresponding Schiff's base. The Schiff's base further on treatment with ammonium acetate (NH(4)OAC) and isatin using silica gel as the solid support, yielded the corresponding aryl imidazoles. In this paper a comparative study between
Effect of substituents on the UV spectra of supermolecular system: Silver nanoparticles with bi-aryl Schiff bases containing hydroxyl
作者:Chao-Tun Cao、Shimao Cheng、Jingyuan Zhang、Chenzhong Cao
DOI:10.1002/poc.3910
日期:2019.3
Effect of substituents on the ultraviolet (UV) spectra of supermolecular system involving silver nanoparticles (AgNPs) and Schiffbases was investigated. AgNPs and 49 samples of model compounds (MC), bi‐aryl Schiffbases containing hydroxyl (XBAY, involving 4‐OHArCHNArY, 2‐OHArCHNArY, XArCHNAr‐4′‐OH, and XArCHNAr‐2′‐OH), were synthesized. The size of AgNPs was characterized by transmission electron
Antioxidant activities and transition metal ion chelating studies of some hydroxyl Schiff base derivatives
作者:Ye Zhang、Biqun Zou、Kai Wang、Yingming Pan、Hong Liang、Xianghui Yi、Hengshan Wang
DOI:10.1007/s00044-011-9648-7
日期:2012.7
hydroxyl Schiffbase (HSB) compounds (1–10) with good radical scavenging activity (RSA) were designed. Compounds 6, 7, and 10 showed better RSAs than the common synthetic antioxidant 2,6-diter-butyl-4-methylphenol (BHT) in DPPH• and ABTS• assays. To probe whether these HSB compounds may exert their antioxidant effect through transition metal ion chelation, the copper and ferrous chelating abilities
Design, synthesis, biological evaluation, and comparative Cox1 and Cox2 docking of p-substituted benzylidenamino phenyl esters of ibuprofenic and mefenamic acids
作者:Gehan H. Hegazy、Hamed I. Ali
DOI:10.1016/j.bmc.2011.12.030
日期:2012.2
is to reduce the GIT toxicity associated with acute and chronic NSAIDs use. Anti-inflammatory, analgesic as well as ulcerogenic activities of the prepared esters were evaluated in vivo and compared with that of ibuprofen as reference standard in all screenings, involving the carrageenan induced paw oedema model and hot plate method. Most of the synthesized esters showed remarkable analgesic and anti-inflammatory
An expeditious one-pot synthesis of substituted phenylazetidin-2-ones in the presence of zeolite
作者:Ramakanth Pagadala、Jyotsna S. Meshram、Himani N. Chopde、Venkateshwarlu Jetti、V. Udayini
DOI:10.1002/jhet.604
日期:2011.9
In this study, one‐pot rapid and efficient series of phenylazetidin‐2‐ones were synthesized from N,N‐dimethylaminobenzaldehyde, different substituted aromatic amines and phenylacetyl chloride in the presence of zeolite catalyst under microwave irradiation. We also reported schiffbases (1a–j) by classical and conventional microwave technique. The titled compounds are evaluated for their antimicrobial