منابع مشابه
synthesis of sulfides from alcohols and thiols in solvent-freeconditions and deoxygenation of sulfoxides
کاتالیست یک سنتز جدید برای تیواترها توصیف شده است. واکنش الکل ها با آریل، هتروآریل و آلکیل تیو ل ها درحضور 1،3،5- تری آزو- 2،4،6- تری فسفرین-2،2،4،4،6،6 هگزاکلراید ((tapc به عنوان یک کاتالیست موُثر، بازده های خوب تا عالی از تیواترها را حاصل می کند. علاوه براین، واکنش تحت شرایط بدون فلز و بدون حلال پیش می رود، بنابراین یک مکمل جالب برای روش های شناخته شده سنتز تیواترها ارائه می دهد. یک مکانیسم ا...
15 صفحه اولBiosynthesis of penicillins; new crystalline biosynthetic penicillins.
Paper III (1) in this series describes several tests which were found to be useful in determining whether a given compound is utilized by the mold in penicillin formation. To provide proof of the incorporation of various acyl groups into the penicillin molecule and to be able to determine the chemical characteristics and biological properties of the various penicillins, isolation and crystalliz...
متن کاملSynthesis, purification and kinetic properties of fluorescein-labelled penicillins.
The synthesis and properties of six fluorescein-labelled penicillins are reported. The two isomers of fluoresceyl-glycyl-6-amino-penicillanic acid are probably the best compounds to use for detection of all the penicillin-binding proteins (PBPs) present in a bacterial membrane preparation. However, the derivatives of ampicillin were much more efficient against Enterobacter aerogenes PBP3. The t...
متن کاملTissue Distribution of Penicillins.
WHILE it is of obvious importance to determine the antibacterial activity of a penicillin in the blood it is perhaps of greater importance to know what concentrations are present in the extravascular fluids. In view of the current interest in protein binding and its influence on activity it is also of importance to determine in what way binding influences distribution throughout the body. Usual...
متن کاملToxicity of the Penicillins.
THE absence of direct toxicity is one of the most remarkable properties of the penicillin molecule; that is to say, the penicillin molecule as we know it and as we should use it. If you try hard enough, you can make it toxic by altering it or abusing it, as I shall try to show later. With this reservation, one can say that penicillin G and the main therapeutic derivatives of 6-aminopenicillanic...
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ژورنال
عنوان ژورنال: Chemical and Pharmaceutical Bulletin
سال: 1987
ISSN: 0009-2363,1347-5223
DOI: 10.1248/cpb.35.3464