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Showing 1-18 of 18 results for "325104" within Papers
Chiaki Miyamoto et al.
Inorganic chemistry, 47(5), 1417-1419 (2008-02-12)
The rate constants for a boronate ion were determined for the first time using the reaction systems of 3-nitrophenylboronic acid (3-NO2PhB(OH)2) with ethylene glycol (EG) and propylene glycol (PG) in an alkaline solution: the rate constants (25 degrees C, I
Meiling Li et al.
Chemical communications (Cambridge, England), 46(13), 2191-2193 (2010-03-18)
The discovery and development of an efficient ene carbocyclization of 1,3-dicarbonyl compounds bearing pendent terminal alkyne substituents under 3-nitrobenzeneboronic acid catalysis is described. The reaction is efficient, easy to perform and general to a wide range of ketoester substrates.
Maria T Gallardo-Williams et al.
The Prostate, 54(1), 44-49 (2002-12-14)
Prostate specific antigen (PSA) is a well-established marker of prostate cancer, but it can also degrade extracellular matrix proteins such as fibronectin and could be involved in tumor progression and metastasis. In this study, we have addressed the use of
Patricio A Sobarzo et al.
Polymers, 11(2) (2019-04-10)
Three new triphenylamine-based oligomeric Schiff bases (polySB1, polySB2 and polySB3) containing tetraphenylsilane core (TPS-core) in the main chain were obtained from TPS-core-based diamines and bis(4-formylphenyl)phenylamine by a high-temperature polycondensation reaction. These new oligomers were structurally characterized by FT-IR, NMR and
Romain Poupart et al.
ACS applied materials & interfaces, 9(37), 31279-31290 (2017-03-08)
Original porous catalytic supports can be engineered via an effective and straightforward synthetic route to polystyrene-block-poly(d,l-lactide) diblock copolymer precursors displaying an acid-cleavable acetal junction between both blocks. To this purpose, we synthesized an acetal-containing heterodifunctional initiator, thus enabling to combine
Chun-Ping Lu et al.
Journal of agricultural and food chemistry, 59(21), 11403-11406 (2011-10-05)
Hydrogen peroxide is commonly used in the food processing industry as a chlorine-free bleaching and sterilizing agent, but excessive amounts of residual hydrogen peroxide have led to cases of food poisoning. Here we describe the development of a novel nonenzymatic
Wei Ke et al.
Antimicrobial agents and chemotherapy, 56(5), 2713-2718 (2012-02-15)
Class A carbapenemases are a major threat to the potency of carbapenem antibiotics. A widespread carbapenemase, KPC-2, is not easily inhibited by β-lactamase inhibitors (i.e., clavulanic acid, sulbactam, and tazobactam). To explore different mechanisms of inhibition of KPC-2, we determined
Malcolm P Nicholls et al.
Organic & biomolecular chemistry, 2(10), 1434-1441 (2004-05-12)
The structures of thermodynamically stable aromatic boronic acid : cyclic carbohydrate chelates in aqueous alkaline media have been studied using 1H NMR spectroscopy and molecular modelling. It is found that interacting saccharides must necessarily possess a synperiplanar diol functionality for
R E Feeney et al.
Journal of protein chemistry, 10(2), 167-170 (1991-04-01)
The activity of antifreeze glycoprotein from the blood serum of Boreagadus saida was strongly inhibited by ions of organic boronic acids as well as by borate. The activity of nonglycoprotein from the blood serum of Pseudopleuronectus americanus, however, was not
Peter Wipf et al.
Journal of combinatorial chemistry, 4(6), 656-660 (2002-11-12)
A combinatorial library of oxazolines and thiazolines was synthesized in moderate to excellent yields using a newly developed methodology. Free carboxylic acids were directly condensed with amino alcohols and aminothiols in the presence of 3-nitrophenylboronic acid as a dehydration catalyst.
Aminophenyl- and nitrophenyl-labeled nucleoside triphosphates: synthesis, enzymatic incorporation, and electrochemical detection.
Hana Cahová et al.
Angewandte Chemie (International ed. in English), 47(11), 2059-2062 (2008-02-09)
B J Johnson
Biochemistry, 20(21), 6103-6108 (1981-10-13)
Highly purified isoaccepting species of transfer ribonucleic acid (tRNA) were prepared by use of a polyacrylamide substituted with nitrobenzeneboronic acid functional groups. This method exploits the well-known ability of boronic acids to complex with RNA cis-diols. tRNA isoacceptors were obtained
K C Usher et al.
Biochemistry, 37(46), 16082-16092 (1998-11-18)
The structures of AmpC beta-lactamase from Escherichia coli, alone and in complex with a transition-state analogue, have been determined by X-ray crystallography. The native enzyme was determined to 2.0 A resolution, and the structure with the transition-state analogue m-aminophenylboronic acid
C W Garner et al.
Biochimica et biophysica acta, 790(1), 91-93 (1984-10-09)
Horse serum cholinesterase (acylcholine acylhydrolase, EC 3.1.1.8) was reversibly inhibited by a variety of alkyl- and areneboronic acids with Ki values ranging from 6.2 mM (methaneboronic acid) to 3.1 microM (diphenylboric acid). Binding to the enzyme was apparently at the
Fan Fei et al.
Analytical and bioanalytical chemistry, 398(3), 1349-1356 (2010-07-29)
The design of boronic acid sensors for photometric detection of carbohydrates has relied on exploiting differences in the thermodynamic stability of complex formation for molecular recognition. Herein, we introduce a direct method for analysis of sugar alcohols using 3-nitrophenylboronic acid
Toby J Roberts et al.
Neuroscience letters, 444(1), 42-47 (2008-08-16)
The NMDA-antagonist dizocilpine (MK-801) is known to have dissociative, neurotoxic and neuroprotective properties. Although its neuroprotective properties are well documented, at present only ex vivo autoradiography has demonstrated its activity in lesioned brains. We report here the use of pharmacological
Azza H Rageh et al.
Electrophoresis, 36(5), 784-795 (2014-09-27)
In this work, we extend our investigations regarding the separation of urinary nucleosides by MEKC with the ionic liquid type surfactant 1-tetradecyl-3-methylimidazolium bromide (C14MImBr). We study the impact of adding alkyl- and arylboronic acids (in the presence of C14MImBr micelles)
Claire Kaiser et al.
Chemical communications (Cambridge, England), (3)(3), 338-340 (2008-04-11)
Electrokinetic probes based on the differential migration of ternary boronate ester complexes permit the selective analysis of micromolar levels of UV-transparent polyol stereoisomers in urine samples via dynamic complexation-capillary electrophoresis that is applicable to single-step screening of in-born errors of
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