A series of novel N-substituted 3-oxo-1,2,3,4-tetrahydro-quinoxaline-6-carboxy- lic acid derivatives were synthesized and evaluated for their biological activities. Among all synthesized target compounds, 13d exhibited the most potent antiproliferative activity against HeLa, SMMC-7721, K562 cell...
The formation of substituted 2-pyrrolidinones and indoles by the reduction of the secondary nitro group in appropriate 3-aryl-2-methylene-4-nitroalkanoates afforded by Baylis–Hillman chemistry via different reducing agents is described. The 3-aryl-2-methylene-4-nitroalkanoate obtained from SN2 ...
Three new photochromic spiropyrans containing a carboxylic group in the indoline fragment and an aldehyde substituent in the [2H]-chromene moiety were synthesized. The structure of the compounds obtained was studied using 1H and 13C NMR, IR and elemental analysis. Single crystal X-ray analysis w...
The condensation of 7-nitroindole-2-carbohydrazide derivatives with acetylacetone lead to (pyrazol-1-yl)(7-nitroindol-2-yl)ketones.
Sodium metabisulfite (SMB) is most commonly used as the preservative in many food preparations and drugs. So far, few studies about its negative effects were reported. The purpose of this study was to investigate the effect of SMB on the expression of big-conductance Ca2+-activated K+ (BKCa), AT...
This study aimed to investigate the effect of ghrelin administration on sulfite induced oxidative and apoptotic changes in rat gastric mucosa. Forty male albino Wistar rats were randomized into control (C), sodium metabisulfite (Na2S2O5) treated (S), ghrelin treated (G) and, Na2S2O5 + ghrelin tr...
Sodium metabisulfite (Na2S2O5) is used as an antioxidant and antimicrobial agent in a variety of drugs and functions as a preservative in many food preparations. In addition to their antioxidant activity, sulfites oxidize to sulfite radicals (SO3-) initiating lipid peroxidation. This study was p...
The in vitro susceptibility to sodium metabisulphite (NaMBS) was investigated in 10 different food spoilage filamentous fungi, namely Aspergillus flavus, A. carbonarius, A. niger, A. ochraceus, A. tubingensis, A. westerdijkiae, Cladosporium cladosporioides, Fusarium oxysporum, Penicillium commun...
Sodium metabisulfite is used in marine shrimp harvesting to prevent the occurrence of black spots. Shrimps are soaked in a sodium metabisulfite solution in ice, which is disposed of in sewages that run into marine canals, creating an environmental hazard. This study evaluates the toxicity and mu...
The effects of sodium metabisulfite (SMB), a food preservative mostly used in food and drug industries, on voltage-dependent potassium currents in acutely isolated hippocampal CA1 pyramidal neurons of rat were studied using the whole-cell patch-clamp techniques. SMB increased transient outward p...
The thermal decomposition kinetics of potassium metabisulfite was studied by thermogravimetric (TG) and differential thermogravimetric (DTG) techniques using non-isothermal experiments. The apparent activation energy (Ea) is determined using the differential (Friedman) isoconversional method. Th...
The carcinogenicity of potassium metabisulfite was examined in ICRJCL mice. Experimental animals were divided into three groups: Group I, 50 male and 50 female mice, received a 1% potassium metabisulfite solution in distilled water for 24 months. Group II, 50 male and 50 female mice, received a ...
The thermal decomposition kinetics of potassium metabisulfite was studied by thermogravimetry using nonisothermal experiments. The complete kinetic analysis was established by the following procedures: isoconversional methods (model-free) (including the Friedman (FR), Kissinger–Akahira–Sunose ...
High quality poly(indole-5-carboxylic acid) (PICA) films were synthesized electrochemically by direct anodic oxidation of indole-5-carboxylic acid (ICA) in boron trifluoride diethyl etherate (BFEE) containing additional 80% diethyl ether (EE) (by volume). PICA films obtained from this medium sho...
We describe the synthesis and structure/activity relationship of RGD mimetics that are potent inhibitors of the integrin αvβ3. Indol-1-yl propionic acids containing a variety of basic moieties at the 5-position, as well as substitutions alpha and beta to the carboxy terminus were synthesized a...
Both enantiomers of the key intermediate, 2-benzyl-5-oxo-tetrahydro-furan-2-carboxylic acid were obtained by asymmetric oxidation of 3-benzyl-2-hydroxy-2-cyclopenten-1-one with an ee ⩾96%, using the tartaric ester/Ti(OiPr)4/t-BuOOH complex, and transformed to the corresponding 4′-substituted nu...
Reaction of N-tert-butyloxycarbonylasparagine (Boc-Asn) with 2 equiv of benzyl bromide in presence of cesium carbonate led to N-benzyl-3-Boc-amino-pyrrolidin-2,5-dione 1a (N-benzyl-3-Boc-aminosuccinimide). Borane dimethylsulfide reduced 3-Boc-aminopyrrolidine-2,5-dione 1a into 3-Boc-aminopyrroli...
A novel ethyl 5-cyano-6-hydroxy-2-methyl-4-(1-naphthyl)-nicotinate is successfully synthesized and the structure is determined by XRD, GC–MS analysis, element analysis and NMR spectroscopic in detail. A reaction mechanism for the reaction is proposed.
The electrochemical oxidation of anodic cobalt in acetonitrile solutions of [(4-methylphenyl)sulfonyl]-1H-imino-2-phenyl-2-oxazoline ligands, [HTsROz], affords compounds of general formula [Co(TsROz)2]. All complexes have been characterised by microanalysis, IR and UV–Vis spectroscopy, magn...
A synthetic procedure for the routine preparation of [18F] N-3-fluoropropyl-2-β-carbomethoxy-3-β-(4′ methylphenyl) nortropane (18F FPCMT) has been developed. The synthesis is based on alkylation of nortropane with 18F labeled fluoropropyl tosylate. Purification of the final product was achiev...
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