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Showing 1 to 20 of 705 for “"Syntheses"”.
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Novel quinone syntheses
… dissertation deals with the investigation of the syntheses of a number of novel quinones. Chapter I deals with the syntheses of quinonoid derivatives of the compounds isobenzofuran and isoindole. These are the parent species of that series of heterocyclic compounds which contain a single …
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Stereospecific Syntheses from Podocarpic Acid
The triterpene precursor, 12-methoxypodocarpa-8,11,13-trien-3-one (46)*, has been prepared via the 3a-alcohol (48) formed by opening of the 3a,4a-epoxide (13) with lithium diethylamide. The total synthesis of the methyl ether of the natural product, (+)-hinokione, has been achieved by a similar …
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Syntheses of tetrasubstituted azo- and azoxybenzenes
"One of the aims of the present work was to study the reductions of a number of chloro-, bromo- and iodonitroanisoles, chloro-, and bromonitrophenetoles, methylnitroanisoles, and also dimethoxy-, and diethoxynitrobenzenes with (a) ethanolic sodium hydroxide and zinc dust, (b) methanolic sodium …
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Asymmetric syntheses of anthraquinonyl C-glycosides
Syntheses of C2-anthraquinone aldehydes from the commercially available anthrarufin 11 have been investigated. A synthesis of the ketoaldehyde 5 in nine steps and 73% overall yield was achieved. Syntheses of 5 exploiting selective oxidations of either a C-bound allyl group via Wacker oxidation to …
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Syntheses and transformations of multimetallic nanoparticles
Multimetallic nanoparticles have had increased interest in recent years. In this thesis, we analyze Au, Ag, and Cu nanoparticles and multimetallic nanoparticles containing these three coinage metals. The incorporation of two or more metals together within nanoparticles allows for synergistic …
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Data-mining natural language materials syntheses
… the potential of this data for informing the syntheses of inorganic materials through the use of data-mining algorithms. Critically, the methods used and produced in this thesis are fully automated, thus maximizing the impact for accelerated synthesis planning by human researchers.
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Syntheses of novel acyclic amino-amido ligands
… (88) with ethylenediamine. The syntheses of functionalized and non-functionalized novel tetraamine dioxo and trioxo ligands from glycine, ethyl N-benzylglycinate (78), L-valine, and L-lysine via classical peptide synthesis methodology (in part) are described.
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Studies towards the syntheses of the citreamicins
… described herein has been focused on the syntheses of the citreamicins, a subset of polycyclic xanthone natural products with a unique five-membered hemiaminal moiety. To the best of our knowledge, there have been no published reports on the total synthesis of any member of the …
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Total Syntheses of 1,2,4-Thiadiazole Natural Products
… synthesised.This thesis describes the total syntheses of all remaining 1,2,4-thiadiazole-containing natural products; polycarpathiamines A and B (12 and 13) derived from the ascidian Polycarpa aurata, along with the Isatis indigotica derived insatindigothiadiazoles A-D (33a-d) and the unnamed …
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Syntheses and Reactions of Trialkoxy and Tetraalkoxysulfuranes
Made available in DSpace on 2014-12-13T20:10:05Z (GMT). No. of bitstreams: 1 7726625.pdf: 3852815 bytes, checksum: 031518b503d3d54090af4a4fc896f18e (MD5) Previous issue date: 1977
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The Total Syntheses of Several Eremophilane Sesquiterpenes
Made available in DSpace on 2014-12-09T17:36:39Z (GMT). No. of bitstreams: 1 7013480.pdf: 4574386 bytes, checksum: 9c9a4ea7fb8ba3ddce2cb2a2cc8386d6 (MD5) Previous issue date: 1969
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Syntheses of luciferins and their bioluminescent evaluation
Luciferins are a class of light emitting small molecule substrates. These molecules are oxidised to produce visible light in a reaction catalysed by the luciferase enzymes. The combination of this luminescent reaction coupled with CCD cameras, has produced revolutionary technologies that enable …
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The syntheses of some naturally derived naphthoquinones
… in three steps in an overall of 34%. The syntheses of the naturally occurring product ventiloquinone E and its trans-isomer as well as an isomer of the naturally occurring ventiloquinone J and its trans-isomer are described in Chapter 3. Starting from 1,2,4,5,8-pentamethoxynaphthalene, the …
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Syntheses related to some naturally occurring naphthopyranquinones
… aromatic oxygenation of 2- acetylnaphthoquinone. Syntheses of 3-acetyl-5-methoxy-1, 4- naphthoquinone and the corresponding 5,7-dimethoxy analogue are described and the use of these in the syntheses of several naturally occurring pyranquinones or their derivatives, has been investigated. In the …
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A Radical Approach to Syntheses and Mechanisms
The critically important nature of radical and radical ion mechanisms in biology and chemistry continues to be recognized as our understanding of these unique transient species grows. The work presented herein demonstrates the versatility of kinetic studies for understanding the elementary chemical …
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Aspen mycorrhizae: ecology, syntheses and growth studies
The ectomycorrhizal communities of three aspen-covered sites in southwestern Montana and southeastern Idaho with varying stand age, conditions, and soil types were compared. In all, 39 species of ectomycorrhizal fungi were associated with P. tremuloides. Dominant fungal species varied by site. …
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Syntheses of mono- and diamide cross -bridged cyclens and syntheses of bifunctional chelators based upon cross -bridged tetraamine macrocycles
<p>The syntheses of two diamide cross-bridged cyclens (22 and 23) and three monoamide cross-bridged cyclens (24, 25, and 26) are presented. Metal (Li(I), Zn(II), and Cu(II)) coordination studies of 26 are also presented. Evidence suggests that ligand 26 forms intermolecular complexes through the …
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