Phytotoxic Metabolites of Ceratocystis Fungi

Strachan, John Bryce (1992) Phytotoxic Metabolites of Ceratocystis Fungi. PhD thesis, University of Glasgow.

Abstract

A number of naturally occurring isocoumarins which have been isolated from Ceratocystis fungi have been synthesised to evaluate their role as phytotoxins and phytoalexins. The route which was used was a modification of the homophthalate approach, with an improved synthesis of the homophthalate itself. This route was adapted to allow the synthesis of some 4-substituted isocoumarins, including the cis diastereomer of perimacol, a metabolite of Periconia macrospinosa. The stereochemistry of these 3,4-disubstituted dihydroisocoumarins was investigated, and in particular the correlation between nmr chemical shifts and coupling constants and relative stereochemistry was studied. 5-Methylmellein was prepared by the indanone approach in a shorter synthesis than the previously published one. An attempt to use the indanone approach to produce 3-hydroxymethyl isocoumarins failed. It was found that such compounds can be obtained by allylic functionalisation of suitably substituted isocoumarins.

• Item Type: Thesis (PhD)
• Qualification Level: Doctoral
• Additional Information: Adviser: Robert Hill
• Keywords: Biochemistry
• Date of Award: 1992
• Depositing User: Enlighten Team
• Unique ID: glathesis:1992-75446
• Copyright: Copyright of this thesis is held by the author.
• Date Deposited: 19 Nov 2019 20:05
• Last Modified: 19 Nov 2019 20:05
• URI: https://theses.gla.ac.uk/id/eprint/75446