Investigations into the asymmetric synthesis and biological activities of some bisbenzyltetrahydroisoquinoline alkaloids

Ralph, Mark S. (2001) Investigations into the asymmetric synthesis and biological activities of some bisbenzyltetrahydroisoquinoline alkaloids. Masters thesis, Memorial University of Newfoundland.

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    Available under License - The author retains copyright ownership and moral rights in this thesis. Neither the thesis nor substantial extracts from it may be printed or otherwise reproduced without the author's permission.
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Abstract

Bisbenzyltetrahydroisoquinoline (BBIQ) alkaloids are a very large and structurally diverse family of compounds that have been isolated from a variety of plant sources and have been found to exhibit a multitude of pharmacological properties including antitumor, antimalarial, and antibacterial activities. Variations in the number of aromatic oxygen substituents present, the number of ether linkages, the nature of the ether bridges and the sites on the two benzylisoquinoline units where the ether or carbon-carbon bond originate, have made BBIQs very interesting targets for several synthetic endeavours. -- The research described herein will focus on the anti-inflammatory and antioxidant activities of the BBIQ oxyacanthine and several other compounds isolated from the herbal plant Mahonia aquifolium using the lipoxygenase inhibition and DPPH radical scavenging assays. In addition, the total synthesis of two target BBIQ are investigated utilizing the Pictet-Spengler and Bischler-Napieralski strategies for isoquinoline formation. Furthermore, alternative means to the classic Ullmann conditions for ether linkages is explored.

Item Type: Thesis (Masters)
URI: http://research.library.mun.ca/id/eprint/1044
Item ID: 1044
Additional Information: Bibliography: leaves 108-112.
Department(s): Science, Faculty of > Chemistry
Date: 2001
Date Type: Submission
Library of Congress Subject Heading: Alkaloids--Synthesis

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