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  • About
  • 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.
1

The mechanism of an unusual benzo-benzo photocycloaddition reaction photophysical and photochemical investigation of [3.3] orthocyclophanes with two face-to-face preoriented benzenoid chromophores [[Elektronische Ressource] /

Tonne, Jörn. January 2001 (has links) (PDF)
Freiburg (Breisgau), University, Diss., 2001.
2

An Efficient Synthesis of £^-Substituted £\,£]-Unsaturated £_-Lactams. Formal Synthesis of (¡Ó)-Protoemetinol.

Huang, Chang-Gin 18 June 2002 (has links)
£^-Substituted £\,£]-unsaturated £_-lactams was synthesized from £\-sulfinyl acetamides in three steps. Formal synthesis of (¡Ó)-Protoemetinol was also reported.
3

Préparation d'analoques de nucléosides et de leurs prodrogues pour une thérapie antivirale des poxvirus / Preparation of nucleoside analogues and their prodrugs targeting an antiviral therapy for poxviruses

Montagu, Aurélien 25 March 2011 (has links)
La menace bioterroriste que preprésente le virus de la variole et l’absence d’un traitement vaccinal ou curratif universel rend primordiale la mise au point d’un antiviral capable de soigner les poxvirus. Devant le grand nombre de nucléosides approuvés à ce jour, la recherche de nouveaux composés visant les enzymes virales et notamment celles des poxvirus reste toujours un axe majeur de recherche Dans cette optique, les réactions organo-métallliques sont des outils efficaces pour la synthèse de nouveaux composés à potentiel thérapeutique. Dans cette thèse, les cycloadditions 1,3 dipolaire de Sharpless catalysées au Cu et au Ru et les réactions de métathèse, croisée catalysées au Ru, nous ont ainsi permis de synthétiser efficacement trois nouvelles séries d’analogues nucléosidiques modifiés. L’évaluation biologique des composés synthétisés montre pour certains d’entre eux des activités supérieures à celles des molécules de référence sur les poxvirus comme sur d’autres virus à ADN. / The lack of a vaccine and of an antiviral to treat the smallpox virus, a potential bioterrorist weapon, makes necessary the development of new antivirals. Given the large number of nucleosides approved, the search for novel compounds targeting viral enzymes, including those viruses remains a major focus of research. In this context, organometallic reactions are effective tools for the synthesis of new compounds with therapeutic potential. During this PhD research program, the Huisgen cycloaddition (CuAAC or RuAAc) and cross coupling metathesis allowed us to efficiently synthesize three new series of modified nucleoside analogues. Biological evaluations show that some synthesized compounds are biologically more interesting than reference molecules on poxvirus as well as on other DNA viruses.
4

Studies towards the total synthesis of novel opiate and Amaryllidaceae alkaloids

Harvey, Darren January 1999 (has links)
An approach to the total synthesis of novel opiate and Amaryllidaceae alkaloids is described. A rapid and efficient construction of the key intermediate [1.83], employing a palladium mediated cyclisation is presented. Studies towards the opiate ring skeleton utilising both nitrone and nitrile oxide [3+2] cycloadditions is investigated. Synthesis of the Amaryllidaceae alkaloids ring structure is described, involving a novel sublimation cyclisation protocol. The total synthesis of N, O-dimethyl norsanguinine is presented.
5

Cycloadditions of heterocyclic sulphinylamines

Wren, S. A. C. January 1986 (has links)
No description available.
6

Towards the total synthesis of glycosphingolipids and glycosylceramides

Brome, Victoria A. January 2001 (has links)
No description available.
7

N-N bond cleavage : an approach to slaframine

Hughes, Deborah January 1989 (has links)
No description available.
8

The use of 8-oxabicyclo(3.2.1.)octenones in the synthesis of natural product analogues

Markson, A. January 1988 (has links)
No description available.
9

Theoretical investigations of ozonolysis

Patrick, Jane Helen January 2001 (has links)
No description available.
10

A cycloaddition route to cyclic triones

Bhalay, Gurdip January 1993 (has links)
No description available.

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