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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

Synthetic studies related to chirally-labelled amino-acids

August, R. A. January 1987 (has links)
No description available.
2

Synthetic studies related to natural products

Malhi, B. S. January 1988 (has links)
No description available.
3

The aza-[2,3]-Wittig sigmatropic rearrangement : versatility and applications

Flaherty, Alice January 2000 (has links)
No description available.
4

The synthesis of enantiomerically pure amino acids

Fraser, Joanne Louise January 1995 (has links)
No description available.
5

Kinetic resolution strategies

De Sousa, J. A. A. January 1992 (has links)
This thesis is concerned with the use of kinetic resolution strategies for the preparation of enantiomerically pure materials. Chapter 1 introduces kinetic resolution. The limitations of conventional kinetic resolutions are described and the methods used to overcome these limitations are discussed. Chapter 2 presents a double kinetic resolution strategy where the recovered reactant from the first kinetic resolution is used as starting material in a second kinetic resolution. In the second kinetic resolution the major enantiomer present in the starting material is the faster reacting enantiomer. Application of this double kinetic resolution strategy to the Sharpless epoxidation is shown to enable enhanced product enantiomeric excesses to be obtained. Chapter 3 presents an alternative double kinetic resolution strategy where the product from the first kinetic resolution is used as starting material in a second kinetic resolution. In the second kinetic resolution the major enantiomer present in the starting material is the faster reacting enantiomer. Application of this double kinetic resolution strategy using lipase mediated esterification and hydrolysis reactions is shown to enable enhanced product yields to be obtained. Chapter 4 describes the preparation of an enantiomerically pure 2-substituted monoprotected propan-1,3-diol derivative via combination of an asymmetric synthesis and a kinetic resolution. Chapter 5 describes the preparation of the pheromone sulcatol in enantiomerically pure form via combination of an asymmetric synthesis and a kinetic resolution. Chapter 6 presents an investigation into the structure of lithium(α-methylbenzyl)- benzyl amide. Chapter 7 describes an attempted dynamic kinetic resolution of 2-substituted monoprotected propan-1,3-diol derivatives. Chapter 8 describes an attempted preparation of the iron crotonyl complex E-[(η<sup>5</sup>-C<sub>5</sub>H<sub>5</sub>)Fe(CO)(PPh<sub>3</sub>)(COCH=CHCH<sub>3</sub>)] in enantiomerically pure form via enzymic kinetic resolution.

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