Publication Date

1989

Document Type

Dissertation/Thesis

First Advisor

Peterson, John Robert

Degree Name

M.S. (Master of Science)

Department

Department of Chemistry

LCSH

Acetates||Organomanganese compounds

Abstract

Manganese(III) acetate was utilized in various synthetic schemes directed at biologically active natural and unnatural products. Salicylic acid and cyclopentanone derivatives were obtained by manganese(III) acetate mediated intramolecular cyclization of ω - unsaturated - β -dicarbonyl compounds. Control of the mode of cyclization (ie. closure to five or six-membered ring) by variation in the nature of the radical terminus was achieved. Platelet activating factor (PAF) is a highly potent phospholipid. It has been linked to various biological activities and pathways, making it one of the important mediators of physiological processes. As part of an attempt to discover new antagonists of PAF, a series of trans-4. 5-dihydro-4-acetoxymethyl-2,5-diaryl-3-furancarboxylates were synthesized. These compounds were modeled after the potent PAF-antagonist trans-2.5- bis(3,4,5-trimethoxyphenyl)tetrahydrofuran. Manganese(III) acetate mediated annulation of aroyl acetates onto cinnamyl esters served as the synthetic methodology for preparation of the dihydrofurans. Dihydrofurans, synthesized as potential PAF-antagonists, served as synthetic intermediates in a new route to a class of antileukemic lignan lactones. In a multistep synthetic sequence consisting of saponification, lactonization and then hydrogenation, 2,3-diaryl-3,7-dioxabicyclo[3.3.0]octan-8-ones were prepared. In the case of the 2,3-diphenyl analogue, cis 3,4-dibenzyl-2,3,4,5-tetrahydrofuran was obtained. These compounds are advanced synthetic precursors of a class of antileukemic dibenzocyclooctadienes exemplified by the lignan lactone steganone.

Comments

Includes bibliographical references (pages 45-49)

Extent

ix, 92 pages

Language

eng

Publisher

Northern Illinois University

Rights Statement

In Copyright

Rights Statement 2

NIU theses are protected by copyright. They may be viewed from Huskie Commons for any purpose, but reproduction or distribution in any format is prohibited without the written permission of the authors.

Media Type

Text

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