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The Global ETD Search service is a free service for researchers
to find electronic theses and dissertations. This service is
provided by the
Networked Digital Library of Theses and Dissertations.
Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
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Showing 141 to 150 of 840 (0.031 seconds)| 141 |
Isolation and structural elucidation of pyrrolizidine alkaloids from four plant sourcesAsibal, Clarita Florendo 08 1900 (has links)
No description available.
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| 142 |
The synthesis of tetracyclic diterpenoid alkaloids and related diterpenoidsMiles, Delbert Howard 12 1900 (has links)
No description available.
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| 143 |
A study concerning the total synthesis of the natural products abyssomicin C and stemofolineVickers, Clare Frances January 2008 (has links)
No description available.
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| 144 |
Syntheses with 2-alkyl-2,3,4,5-tetrahydropyridine-1-oxidesCoggins, P. January 1989 (has links)
No description available.
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| 145 |
Studies on rutaceous natural productsNizami, Shaikh Sirajuddin January 1990 (has links)
The first chapter of this thesis deals with the synthesis, cyclisation of 2-aminobenzophenones and biomimetic synthesis of acridone alkaloids. The biogenesis of acridone alkaloids produced in tissue culture is described. 2,4,6-Triacetoxy-2'-methylaminobenzophenone was prepared to study its cyclisation to the acridone ring system. 2,4,6-Triacetoxy-2'-methylaminobenzophenone was converted to 1,3-dihydroxy-N-methylacridone. The intermediate 2,4,6-trihydroxy-2'-methylaminobenzophenone was also synthesised and found to be highly reactive, cyclising extremely easily to the acridone thus confirming the probable role of the 2'-aminobenzophenone as a precursor in the biosynthesis of acridone alkaloids in tissue cultures. The second part is concerned with a phytochemical investigation of two species of <i>Ruta</i> namely <i>Ruta montana</i> and <i>Ruta chalepensis</i> from Turkey. This chapter deals with the isolation and identification of coumarins and alkaloids from both species of <i>Ruta</i>. The compounds which are isolated and identified from root extracts of <i>Ruta montana</i> are chalepensin, rutamarin, xanthotoxin and marmesin. From the root extract of <i>Ruta chalepensis</i> the alkaloid skimmianine was isolated together with chalepensin, rutamarin, and bargapten. An as yet, unidentified sugar was isolated. The structures of these natural products were elucidated on the basis of spectroscopic data together with comparisons with published data and authentic samples (wherever possible).
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| 146 |
Synthetic and methodological aspects of free radical chemistryMakin, Scott D. January 2000 (has links)
No description available.
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| 147 |
Development of free radical methodology for natural products synthesisLizos, Dimitrios January 2003 (has links)
No description available.
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| 148 |
Structure, stereochemistry and reactions of aza-polycyclic metabolitesCarroll, Jonathan G. January 1999 (has links)
No description available.
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| 149 |
Crystallographic studies of relative and absolute stereochemistry in substituted arenes and arene metababolitesEvans, Timothy Arthur January 1994 (has links)
No description available.
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| 150 |
The alkaloids of Platydesma campanulata MannWerny, Frank January 1962 (has links)
Typescript. / Thesis (Ph. D.)--University of Hawaii, 1963. / Bibliography: leaves [78]-85. / vii, 85, [1] l diagrs., tables
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