Lambertellols A and B, Novel 3,4-Dihydronaphthalen-1(2H)-ones with Spiro-butenolide Produced by Lambertella sp.1346

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Abstract

[structure: see text] Lambertella sp. 1346 was found to produce lambertellols A (1) and B (2) carrying a novel dihydronaphthalen-1(2H)-ones with spiro-1-furan-2(5'H)-one. The spiro-lactone ring moiety of both 1 and 2 were easily migrated to afford lambertellin, a known metabolite of Lambertella corni-maris. The absolute stereochemistry of these compounds was established on the basis of CD spectrum after chemical derivatization.

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