Naturally occurring dibenzofurans. Part7. The synthesis of ψ-rhodomyrtoxin
Abstract
The synthesis of 1,1′-(1,3,7,9-tetrahydroxy-2,8-dimethyldibenzofuran-4,6-diyl)-2,3′-dimethylbisbutan-1-one (ψ-rhodomyrtoxin)(2) is described. Intramolecular Ullmann reaction of bis(2-iodo-3,5-dimethoxy-4-methylphenyl) ether (8) yielded 1,3,7,9-tetramethoxy-2,8-dimethyldibenzofuran (9) which was converted, in subsequent steps, into the natural product.