The isolation, structure
determination, and chemical reactions of dothistromin
(2,3,3a,5,10,12a-hexahydro-2,3a,4,6,9-pentahydroxyanthra[2,3-b]furo[3,2-d]furan-5,-10-dione), a toxic metabolite from Dothiatroma pini, are
described. 47 nm with the
Structures for corticin A (5), B (6), and C (14), benzobisbenzofuranoid
metabolites of the fungus Corticium caeruleum are suggested. The synthesis of a number of benzobisbenzofuranoid derivatives is described and their
mass spectra are discussed.
The synthesis of 2-methylpyrrolo[l,2-alpyrazin-l(2H)-one (2) present in the insect feeding deterrent peramine (1) through oxidation of the saturated lactam (3) is described. The preparation of the related 6-methyl-1 H-pyrrolo[2,3-clpyridin-7(6 H)-one (12) through a Lewis-acid-catalysed cyclization of the amide acetal (7) is also described.
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