THE ABSOLUTE CONFIGURATION OF CURDIONE AND THE STEREOSTRUCTURE OF CURCUMALACTONE FROM CURCUMA WENYUJIN

Seiichi Inayama; JiFu Gao; Kenzo Harimaya; Manabu Hikichi; Yoichi Iitaka; YongTian Guo; Takeshi Kawamata

doi:10.1248/cpb.33.2179

Seiichi Inayama, JiFu Gao, Kenzo Harimaya, Manabu Hikichi, Yoichi Iitaka, YongTian Guo, Takeshi Kawamata

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Keywords: ^1H-NMR (400 MHz)

JOURNAL FREE ACCESS

1985 Volume 33 Issue 5 Pages 2179-2182

DOI https://doi.org/10.1248/cpb.33.2179

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Abstract

The absolute configuration of curdione isolated from Curcuma wenyujin was determined as 1 on the basis of its CD spectra and the X-ray diffraction of the p-bromobenzoate of 8αH-dihydrocurdione (2a). The absolute stereostructure of a new spirocyclopentanolide, curcumalactone occuring in the titled plant, was deduced as 3 based on its direct X-ray analysis and the biomimetic transformation of 1 to 3.

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