Multiple electrophilic aromatic substitution reactions of phloroglucinol and studies towards the total synthesis of hopeanol

Author: 
Date created: 
2011-08-05
Identifier: 
etd6765
Keywords: 
Phloroglucinol
C3-symmetric dendrimer cores
C2-symmetric polycyclic quinone
Xyloketal A
Triple Mannich bases
Triple electrophilic aromatic substitution (EAS) reactions
Abstract: 

An investigation of the triple electrophilic aromatic substitution (EAS) reactions of phloroglucinol (1,3,5-trihydroxybenzene) has led to the preparation of both symmetrical triple Mannich bases and structurally-complex polycyclic adducts. This research was based on two synthetic approaches that were developed separately for the total synthesis of the polycyclic and C3-symmetric natural product xyloketal A. The first systematic study led to the synthesis of a series of functionalized C3-symmetric dendrimer cores. In the second study, polycyclic analogues of xyloketal A were prepared via the triple EAS reactions of phloroglucinol with various carbon-based electrophiles. In addition, a novel C2-symmetric polycyclic quinone was isolated from the reaction of phloroglucinol with (+)-p-mentha-2-ene-1,8-diol. In a separate study, the total synthesis of the natural product hopeanol was undertaken. This involved the preparation of a 1,2-diketone precursor which was tested with an array of acid promoters in an attempt to complete this synthesis in a single synthetic operation.

Document type: 
Thesis
Rights: 
Copyright remains with the author. The author granted permission for the file to be printed and for the text to be copied and pasted.
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Supervisor(s): 
Peter Wilson
Department: 
Science: Department of Chemistry
Thesis type: 
(Thesis) M.Sc.
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