7450-57-9Relevant academic research and scientific papers
Novel self-dyed wholly aromatic polyamide-hydrazides covalently bonded with azo groups in their main chains: 1. structure-property relationships
Mohamed, Nadia A.,Sammour, Mohammad H.,Elshafai, Ali M.
, p. 13969 - 13988 (2013/03/13)
Twelve novel intrinsically colored wholly aromatic azopolyamide-hydrazides containing various proportions of para- and meta-phenylene units were successfully synthesized by a low temperature (-10 °C) solution polycondensation reaction of either 4-Amino-3-hydroxybenzhydrazide (4A3HBH) or 3-Amino-4-hydroxybenzhydrazide (3A4HBH) with an equimolar amount of either 4,4'-Azodibenzoyl chloride (4,4'ADBC), 3,3'-Azodibenzoyl chloride (3,3'ADBC), or mixtures of various molar ratios of 4,4'ADBC and 3,3'ADBC in anhydrous N,N-dimethyl acetamide (DMAc) containing 3% (wt/v) LiCl as a solvent. The structures of the polymers were proven by elemental analysis, FTIR, 1H- and 13C-NMR spectroscopy. The polymers' properties were strongly affected by their various structures. The intrinsic viscosities of the polymers were ranged from 0.7 to 4.75 dL g-1 and increased with the para-phenylene units content. The polymers are partially soluble in DMAc, dimethyl formamide (DMF) and N-methyl-2-pyrrolidone (NMP). Their solubility increases with the introduction of meta-phenylene moieties into the polymer chains. The polymers exhibit a great affinity for water sorption. Their hydrophilicity increases as a function of the content of meta-phenylene rings incorporated into the polymer. Mechanical properties of the polymer films are improved markedly by substitution of para-phenylene units for meta-phenylene units. The completely para-oriented type polymer has the best thermal and thermo-oxidative stability relative to those of the other polymers.
Antileishmanial activity screening of 5-nitro-2-heterocyclic benzylidene hydrazides
Rando, Daniela G.,Avery, Mitchell A.,Tekwani, Babu L.,Khan, Shabana I.,Ferreira, Elizabeth I.
, p. 6724 - 6731 (2008/12/22)
A series of 53 nitro derivatives rationally designed were obtained by parallel synthesis and screened against Leishmania donovani. Six compounds exhibited IC50 values lower than standard drugs. Brief SAR analysis revealed that substitution is important to the activity. Nitrothiophene analogues were more potent than the nitrofuran ones. This was attributed to the ability of sulfur atoms in accommodating electrons from nitro group, which facilitate its reduction and therefore the formation of free radicals lethal to parasites.
Glucagon antagonists/inverse agonists
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, (2008/06/13)
Non-peptide compounds comprising a central hydrazide motif and methods for the synthesis thereof are disclosed. The compounds act to antagonize the action of the glucagon peptide hormone.
Amino-benzoic acids and derivatives, and methods of use
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, (2008/06/13)
The present invention relates to compounds, compositions and methods for inhibiting nonenzymatic cross-linking (protein aging). Accordingly, a composition is disclosed which comprises an agent capable of inhibiting the formation of advanced glycosylation endproducts of target proteins by reacting with a carbonyl moiety of the early glycosylation product of such target proteins formed by their initial glycosylation. The method comprises contacting the target protein with the composition. Both industrial and therapeutic applications for the invention are envisioned, as food spoilage and animal protein aging can be treated.
Methods for glycosylation inhibition using amino-benzoic acids and derivatives
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, (2008/06/13)
The present invention relates to compounds, compositions and methods for inhibiting nonenzymatic cross-linking (protein aging). Accordingly, a composition is disclosed which comprises an agent capable of inhibiting the formation of advanced glycosylation endproducts of target proteins by reacting with a carbonyl moiety of the early glycosylation product of such target proteins formed by their initial glycosylation. The method comprises contacting the target protein with the composition. Both industrial and therapeutic applications for the invention are envisioned, as food spoilage and animal protein aging can be treated.
