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Showing 1 to 20 of 38 for “"Nitro Group"”.
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Chalcones derived from m-nitroacetophenone
… derivatives of various chalcones having the nitro group substituted in the 3<sup>1</sup>-position, the idea being to help complete the series of chalcones having the nitro group in that position. This was to be done by condensing various substituted benzaldehydes with m-nitroacetophenone, …
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Physical Chemical Studies of Some Complex Inorganic Compounds: I. The Kinetics of Aquation of Cis-Dichloro-Bis-(ethylenediamine)-Chromium(iii) Ion. Ii. The Stereochemistry of Some Triethylenetetramine Complexes. iii.the Reduction of a Nitro Group Coordinated to Platinum
Made available in DSpace on 2014-12-05T19:36:48Z (GMT). No. of bitstreams: 1 0025279.pdf: 6920085 bytes, checksum: 6859dbd75e46fa6b0d83bc8cd807eede (MD5) Previous issue date: 1957
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The Development of 2,3-Diarylindenes as Integrated Fluorescent Estrogens
… sensitivity was attained by affixing an acceptor nitro auxochrome to the 2-aryl ring. In the p-position, the nitro group produced a quasi-planar intramolecular charge transfer state, with emission from 490 nm in heptane to 672 nm in acetonitrile. In the m-position, a nitro group produces a twisted …
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Towards next-generation degradable polymers via double amplification
… retro-Mannich reactions were found to occur if a nitro group remained from earlier synthetic steps. Removal of this nitro group via reduction is expected to allow for the synthesis of tris(aminomethyl)methanes to occur as predicted. The concept of double amplification was explored in the context …
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Syntheses of Azido- and Diazido- 10-Methylacridinium Salts.
… synthesized in good yield from the corresponding nitro- and diaminoacridines. The synthetic scheme involved reduction of the nitro group to an amino function, acetylation of the primary amino group, methylation of the ring nitrogen with subsequent removal of the protecting group and diazotization …
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Synthetic and mechanistic studies in polynitroaromatic chemistry.
… presently employed, but still based on a polynitroaromatic nucleus. The major aim of this programme was to produce new liquid or low melting polynitroaromatic compounds by simple routes. A literature search highlighted various molecular features which appeared to produce a low melting …
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Medicinal nitro compounds
… a review of the biological properties of nitro compounds. Included in the discussion are those derivatives which have clinically-useful activity and those of a More experimental nature. Some metabolic transformations of nitro compounds are discussed, and the possibility that the toxicity …
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A Comparative Study of Inductive Influence on the Hydrolysis of Beta-Thioglucopyranosides by Beta-Thioglucosidase and Beta-Glucosidase
… electron-attracting substituents in the phenyl group were strong enough to greatly weaken the strength of the sulfur linkage, as in the case of the nitro group, would there be any hydrolysis. The lack of hydrolysis prevented application of the Hammett equation in testing the quantitative …
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A Contribution to the Chemistry of 1,2,3-BENZOTHIADIAZOLE
… spectrum are discussed. Evidence that the -NsN- group in 1,2,3-benzothiadiazole resembles a nitro-group is quoted and this fact together with the suggestion that there is partial bond fixation in the benzene ring is used to explain the products of electrophilic substitution. Much of the work …
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Intermediate compounds in the synthesis of lignin
… was to protect the carbonyl with a non-reactive group.</p><p>The bisulfite addition product and the 2,4-dinitrophenylhydrazone of salicylaldehyde were prepared. The methyl acetal, the sodium bisulfite addition product, and the 2,4-dinitrophenylhydrazone of benzaldehyde were also …
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The Role of Glutathione Transferases in the Detoxification of TNT
… and improper disposal of the explosive 2,4,6-trinitrotoluene (TNT) have led to widespread, global contamination of soil and groundwater. TNT is highly toxic and recalcitrant to degradation resulting in environmental build-up with far reaching ecological and health implications. It is therefore a …
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DESIGN, SYNTHESIS, AND BIOLOGICAL EVALUATION OF NOVEL INDENOISOQUINOLINES AS POTENTIAL ANTICANCER AGENTS
… (3) seek out bioisosteric replacements for the nitro group in the highly active 3-nitroindenoisoquinoline Top1 inhibitor series; and (4) design and test dimeric indenoisoquinolines that could
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Structure-activity relationships of niclosamide to overcome colistin resistance
… objectives: mitigating toxicity by replacing the nitro group, modifying the central amide moiety, and designing niclosamide-based hybrid antibiotics. Our SAR investigation led to the discovery of several lead compounds with comparable colistin-potentiating activity to niclosamide but with reduced …
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Preparation of organic hydrazides
… can be envisaged by the reduction of N-nitroamides. The problem is then to find a set of conditions under which no hydrogenolysis of the nitrogen-nitrogen bond occurs. This had been done with N-nitrocarbamates and it was hoped that the results could be extended to N-nitroamides: …
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Application of Density Functional Theory to Study the Mechanism of Alkali Metal Enolate Oxidation by N-sulfonyloxaziridines, Umpolung Amide Synthesis from Halo-Amino-Nitro Alkanes, Alkali-Metal Catalyzed Transfer Hydrogenation of Ketones, and Asymmetric Catalyzed Aza-Henry Reactions
… amide synthesis working from 1,1,1,1-halo-amino-nitro-alkanes leading to the finding that the amide oxygen originates from the nitro group but also from explicitly interacting water molecules in competing pathways. (3) alkali (Li+, Na+, and K+) metal-catalyzed transfer hydrogenation of …
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A study of some derivatives of brilliant green
… A value for the steric factor, U, for the ortho-nitro-group has been determined, which shows that this group lies between its coplanar and orthogonal extremes in the dye. Anomalous behaviour, for which reasoned arguments are presented, has been observed for 2-hydroxy-Brilliant Green, …
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Avaliação da atividade antifúngica de ésteres benzoicos estruturalmente relacionados frente a espécies de Candida
… of substituents in this bioactivity: the methyl group in para position of the ring contributed to the inactivity of the compounds in question; the hydroxyl group in the same position improved bioactivity in some cases, being important for interaction with components of the fungal membrane through …
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A Computational Investigation of the Mechanism of CB1954 Reduction by E.coli Nitroreductase
The flavoenzyme NTR (nitroreductase nfsB from Escherichia coli) and the prodrug CB1954 (5-[aziridin-1-yl]-2,4-dinitrobenzamide) have been found to be a good potential combination for virus-directed enzyme prodrug therapy (VDEPT). However, wild-type NTR has poor kinetics and binding with CB1954, and …
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Nitrophenyl boronic acids as derivatizing agents in chromatography
The suitability of nitrophenyl boronates as derivatives for GC and HPLC analysis has been studied. Samples of ortho, meta and para nitrophenyl boronic acids were prepared and purified, the purity of these products was examined by GC. The derivatization performance of these acids was studied …
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