Chemical & Pharmaceutical Bulletin 2005-11-01

Biotransformation of citrus aromatics nootkatone and valencene by microorganisms.

Mai Furusawa, Toshihiro Hashimoto, Yoshiaki Noma, Yoshinori Asakawa

Index: Chem. Pharm. Bull. 53(11) , 1423-9, (2005)

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Abstract

Biotransformations of the sesquiterpene ketone nootkatone from the crude drug Alpiniae Fructus and grapefruit oil, and the sesquiterpene hydrocarbon valencene from Valencia orange oil were carried out with microorganisms such as Aspergillus niger, Botryosphaeria dothidea, and Fusarium culmorum to afford structurally interesting metabolites. Their stereostructures were established by a combination of high-resolution NMR spectral and X-ray crystallographic analysis and chemical reaction. Metabolic pathways of compounds and by A. niger are proposed.