Metabolic Products of Fungi. XXIX. The Structure of Aurofusarin. (2)

Eisaku Morishita, Tadahiro Takeda, Shoji Shibata

Chemical and Pharmaceutical Bulletin · 1968 · 16 citations · 0 references

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Abstract

The structure of aurofusarin (Ia) was established by the biogenetical type synthesis. Rubrofusarin (IIa) was partially methylated to yield monomethyl ether A (IIb) which was converted into IIIa by oxidation with Fremy's salt. Partial demethylation of IIIa to IIIb followed by oxidative coupling using potassiumpersulphate as the reagent afforded 7, 7'-bis (8-hydroxy-5-methoxy-2-methyl-4H-naphtho [2, 3-b] pyrane-4, 6, 9-(6H, 9H) trione] (Ic), whose methyl ether was proved to be identical with aurofusarin dimethyl ether (Ib).