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Nitroaromatic Compounds (nitroaromatic + compound)
Selected AbstractsPyrene-Functionalised, Alternating Copolyimide for Sensing Nitroaromatic CompoundsMACROMOLECULAR RAPID COMMUNICATIONS, Issue 6 2009Stefano Burattini Abstract A novel, pyrene-functionalised copolymer has been synthesised in a single step via imidisation of poly(maleic anhydride- alt -1-octadecene) with 1-pyrenemethylamine, and its potential for the detection of volatile nitro aromatic compounds (NACs) evaluated. The new copolymer forms complexes in solution with NACs such as 2,5-dinitrobenzonitrile, as shown by 1H NMR, UV-vis and fluorescence spectroscopy. Moreover, thin films of this copolymer, cast from THF solution, undergo almost instantaneous fluorescence quenching when exposed to the vapour of 2,5-dinitrobenzonitrile (a model for TNT) at ambient temperatures and pressures. [source] ChemInform Abstract: Direct Coupling of Nucleophiles with Nitroaromatic Compounds via Fluoride-Promoted Oxidative Nucleophilic Aromatic Substitution for Hydrogen.CHEMINFORM, Issue 32 2001Inma Huertas Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source] Degradation of nitroaromatic compounds: a model to study evolution of metabolic pathwaysMOLECULAR MICROBIOLOGY, Issue 4 2009Maia Kivisaar Summary Although many nitroaromatic compounds have been in nature for only a few decades, bacteria have already evolved the ability to metabolize them. Both horizontal transfer of genes and mutagenesis induced under stressful conditions might facilitate evolution of new catabolic pathways. Nitrotoluene degradation pathways are supposedly derived from an ancestral naphthalene degradation pathway. The 2-nitrotoluene degradation genes in Acidovorax sp. strain JS42 are controlled by the transcriptional activator NtdR, which differs from NagR, the activator of the naphthalene degradation operon in Ralstonia sp. strain U2, by only five amino acids. Both regulators respond to salicylate, an intermediate of naphthalene degradation, but NtdR also recognizes a wide range of nitroaromatic compounds. In this issue of Molecular Microbiology, Ju et al. present results of site-directed mutagenesis of NtdR and NagR and show how the nitrotoluene-responsive regulator NtdR can be generated from a NagR-like ancestor by only a few mutations. The reconstructed hypothetical pathway for the evolution of NtdR from NagR demonstrates stepwise broadening of the effector range of the evolving protein without loss of the original activity. These results provide strong evidence for the idea that promiscuity of proteins is an important step in the evolution of new functions. [source] Palladium-catalyzed reduction of nitroaromatic compounds to the corresponding anilinesAPPLIED ORGANOMETALLIC CHEMISTRY, Issue 6 2010Maryam Mirza-Aghayan Abstract Reduction of a variety of nitroaromatic compounds with triethylsilane in the presence of catalytic amounts of palladium chloride in ethanol resulted in the formation of the corresponding anilines in excellent yields. Copyright © 2010 John Wiley & Sons, Ltd. [source] | ||||||||||