Starch/acrylamide/allyl triphenyl phosphonium bromide (St/AM/TP) copolymers were synthesized by simultaneous gamma irradiation and characterized by FTIR and 1H NMR techniques, weight measurement and titration method. Moreover, their antibacterial activities against Staphylococcus aureus were exp...
A new compound 4-(n-2′-glucosyl) butyramidyl triphenyl phosphonium chloride (4-GBTPC) was synthesized, and its interactions with nucleic acid were studied by fluorescence method. The results of the experiment indicated that DNA can obviously decrease the fluorescence intensity of 4-GBTPC by the...
We tested the ultraviolet screen 3-(4-methylbenzylidene)-camphor (4-MBC; Eusolex 6300), which has been implicated as a potential endocrine disruptor, for its potential to bind to and activate endogenous estrogen receptors (ER) and to mediate ER-dependent changes in gene transcription, in hepatoc...
The toxicokinetics of 4-MBC after dermal administration were investigated in human subjects and in rats. Humans (3 male and 3 female subjects) were exposed to 4-MBC by topical application of a commercial sunscreen formulation containing 4% 4-MBC (w/w), covering 90% of the body surface and result...
3-(4-Methylbenzylidene)camphor (4-MBC) is an UV-filter frequently used in sunscreens and cosmetics. Equivocal findings in some screening tests for hormonal activity initiated a discussion on a possible weak estrogenicity of 4-MBC. In this study, the toxicokinetics and biotransformation of 4-MBC ...
UV filters represent new classes of estrogenic [Environ. Health Perspect. 109 (2001) 239] or antiandrogenic [Toxicol. Sci. 74 (2003) 43] chemicals. We tested 3-benzylidene camphor (3-BC), reported as estrogenic in fish [Pharmacol. Toxicol. 91 (2002) 204], and mammalian systems in comparison to 4...
Differential scanning calorimetry (DSC) and atomic force microscopy (AFM) measurements indicate that 1,2,3,4-bis(p-methylbenzylidene) sorbitol (MDBS) is a nucleating agent for both poly(3-alkylthiophene)s (P3ATs) and [6,6]-phenyl C61-butyric acid methyl ester (PCBM), but the intermolecular inter...
In the paper, a novel mutli-wavelength emissive aluminium ion chemosensor based on 3-[1′-(2′-hydroxy-α-methylbenzylidene-imino)]-2-(p-N,N-dimethyl aminophenyl)-1,2-dihydroquinazolin-4-(3H)-one is designed and synthesized. According to the fluorescence behavior toward several metal ions, it sh...
The sulfonamide compound, 4-[(2-hydroxy-3-methylbenzylidene)amino]benzenesulfonamide was synthesized and grown as a high quality single crystal by the slow evaporation solution growth technique. The structure of the compound was characterized by FT-IR, 1H and 13C NMR, UV–Vis and X-ray single cr...
Ethyl 2-(4-methylbenzylidene)-3-oxobutanoate was synthesized by Knoevenagel condensation reaction of 4-methylbenzaldehyde and ethyl acetoacetate in the presence of catalytic amount of piperidine and trifluoroacetic acid in benzene under reflux conditions. The synthesised compound was characteriz...
Groups of 15 male and 15 female rats were given 0 (control), 50, 100, 200 or 800 ppm allyl alcohol in the drinking water for 15 weeks. There were no effects attributable to allyl alcohol in the results of the haematological examinations or analyses of serum. There was a dose-related reduction in...
Several methyl(allyl)thallium derivatives have been prepared for the first time. The IR and PMR spectra of these compounds indicate the presence of σ-allylthallium bonds. In the cleavage reactions of these compounds with tetramethyltin in methanol or with metal salts such as Hg(OCOCH3)2, PdX2...
Groups of 15 rats of each sex were given daily doses of 0, 10, 100 or 1000 mg isobutyl isobutyrate/kg by stomach tube for 18wk. The treatment had no significant effects on body-weight gain, food and water intake, haematological findings, serum and urine analyses, organ weights or histopathology....
Various metals, such as Pd, Ir, Ni, Cu, Fe, Ru, Rh, Mo, W, Pt, etc., can form allyl metal complexes, which react with a wide range of carbon and heteroatom nucleophiles. This chapter focuses on the developments in this field after the publication of the first edition of Comprehensive Organic Syn...
A new facial amphiphile cholestane-based receptor 1 containing a 2-imidazolylethylamino moiety at the 3α and 7α positions of cholestane was synthesized. Recognition selectivity of the new receptor 1 with various dicarboxylic acids was assessed by 1H NMR titration. Maleic acid showed the highes...
The discovery of a 2-aryl-3-aroyl indole-based small-molecule inhibitor of tubulin assembly (referred to as OXi8006) inspired the design, synthesis, and biological evaluation of a series of diversely functionalized analogues. In the majority of examples, the pendant 2-aryl ring contained a 3-hyd...
An efficient diastereoselective approach to access trans-5-hydroxy-6-substitutedethanone-2-piperidinones skeleton has been developed through sequential addition-deprotection-cyclization process involving aldimine 6 with substituted acetones. The diastereoselectivity of substitution at C-6 positi...
The principal alarm pheromone of Atta texana S-(+)-4-methyl-3-heptanone, and its enantiomer have been prepared synthetically in high optical purity.
All of the four possible stereoisomers [(4S,5R)-, (4R,5S)-, (4R,5R)- and (4S,5S)-isomers] of 5-hydroxy-4-methyl-3-heptanone (sitophilure) were synthesized from methyl (R)-3-hydroxypentanoate of microbial origin.
4-Methyl-3-heptanone (I) has been isolated from the mandibular glands of Pogonomyrmex barbatus (F. Smith). It is also found in P. californicus (Buckley), P. desertorum Wheeler, P. occidentalis (Cresson), P. rugosus Emery, and P. badius (Latreille). This ketone appears to function as an alarm phe...
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