نتایج جستجو برای: benzyl
تعداد نتایج: 8220 فیلتر نتایج به سال:
A manganese(II) complex of 2,2’-bipyridine (bipy) was synthesized and characterized by X-ray diffraction, IR, and UV-vis spectroscopy. The activity of the complex was tested for oxidation of benzyl alcohols using t -BuOOH as an oxidant in organic solvents and in an organic/water biphasic system (hexane/H2O, toluene/H2O). The effect of solvent, temperature, oxidant, and some additives (KBr, N(C ...
The search for an orally administered and stable penicillin preparation with high therapeutic efficacy led to the recent discovery that the benzyl ester of penicillin, given orally, was at least equal in protective effect to the equivalent weight of sodium penicillin administered parenterally to mice that had received lethal doses of pneumococci and hemolytic streptococci by intraperitoneal inj...
Background Penicillin skin testing (PST) with the major determinant (benzyl-penicilloyl) and minor determinant mix (penicillin G, benzyl-penicilloate, and benzyl-penilloate) is one of the major diagnostic tools in the evaluation of a penicillin allergy mediated by IgE. The PST begins with a skin prick test (SP) with the above components and, if negative, then proceeds to an intradermal testing ...
Benzyl and chlorobenzyl substituted 1, 3, 4-thiadiazole imine derivatives have been prepared by refluxing aromatic aldehyde imine derivatives and benzyl chloride/ 4-chloro benzyl chloride in ethanolic potassium hydroxide. The structures of the compounds have been determined by spectral and chemical methods. The anticonvulsant activity has been carried out using Karl et al. method. All the repor...
The degradation of benzyl nicotinate in aqueous solution over a pH range of 2.0-10.0 at 50+/-0.2 degrees was studied. The degradation was determined by high performance liquid chromatography. The degradation was observed to follow apparent first-order rate kinetics and the rate constant for the decomposition at 25 degrees was estimated by extrapolation. The reaction was shown to be hydroxide io...
In this work, benzyl alcohol was obtained in 96% excellent yield by hydrolysis of benzyl chloride catalyzedby the recyclable temperature-dependant phase-separation system that comprised the ionic liquid PEG1000-DAIL[BF4], toluene and ferric sulfate under homogeneous catalysis in aqueous media. This novel methodnot only enhanced the yield, but also made the operating units easy workup. The catal...
The high temperature decomposition kinetics of toluene and benzyl were investigated by combining a kinetic analysis with the ab initio/master equation study of new reaction channels. It was found that similarly to toluene, which decomposes to benzyl and phenyl losing atomic hydrogen and methyl, also benzyl decomposition proceeds through two channels with similar products. The first leads to the...
The emergence of strains of Schistosoma resistant to praziquantel has drawn attention to the search for new schistosomacide drugs. Imidazolidinic derivatives have performed outstandingly against adult S. mansoni worms when evaluated in vitro. The molecular modification of imidazolidine by way of bioisosteric replacement gives rise to variations in its biological response. This study verifies th...
BACKGROUND There are concerns that the evidence from studies showing noninferiority of oral amoxicillin to benzyl penicillin for severe pneumonia may not be generalizable to high-mortality settings. METHODS An open-label, multicenter, randomized controlled noninferiority trial was conducted at 6 Kenyan hospitals. Eligible children aged 2-59 months were randomized to receive amoxicillin or ben...
Polysaccharides from natural sources and iron precursors were applied to develop new bio-nanocomposites by mechanochemical milling processes. The proposed methodology was demonstrated to be advantageous in comparison with other protocols for the synthesis of iron oxide based nanostructures. Additionally, mechanochemistry has enormous potential from an environmental point-of-view since it is abl...
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