The biosynthesis of fungal metabolites. Part VI. Structures and biosynthesis of some minor metabolites from variant strains of Aspergillus variecolor
- 1 January 1975
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society, Perkin Transactions 1
- No. 6,p. 549-554
- https://doi.org/10.1039/p19750000549
Abstract
New minor metabolites from variant strains of A. variecolor are shown to be (1R,2S)-8-[(2S)-2,3-dihydroxy-3-methylbutyl]-2,3-dihydro-1,11-dihydroxy-2-isopropenyl-5-methyl-(III), (1R,2S)-2,3-dihydro-1,11-dihydroxy-8-[(2S)-2-hydroxy-3-methoxy-3-methylbutyl]-2-isopropenyl-5-methyl-(IV), 1,2-trans-1-acetoxy-8-(2,3-epoxy-1-hydroxy-3-methylbutyl)-2,3-dihydro-11-hydroxy-2-isopropenyl-5-methyl-(V), 1,2-trans-1-acetoxy-8-(2,3-epoxy-1-methoxy-3-methylbutyl)-2,3-dihydro-11-hydroxy-2-isopropenyl-5-methyl-(VI), and 1,2-cis-2,3-dihydro-1,11-dihydroxy-2-isopropenyl-5-methyl-10-(3-methylbut-2-enyl)-pyrano[3,2-a]xanthen-12(1H)-one (X), 1,10-dihydroxy-6-methoxy-8-methyl-2-(3-methylbut-2-enyl)-7-(3-methylbut-2-enyloxy)-dibenz[b,e]oxepin-11(6H)-one (XVIII), and 1,12a-dihydro-6,8-dihydroxy-1-(1-hydroxy-1-methylethyl)-4-methyl-9-(2-hydroxy-3-methylbut-3-enyl)[1]benzopyrano[4,5-bc][1]benzoxepin-7(2H)-one (XXI). A biogenetic relationship is suggested which explains the co-occurrence of these compounds with other metabolites of known structures.Keywords
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