3-oxoteasterone and the epimerization of teasterone: Identification in lily anthers and Distylium racemosum [Hamamelidaceae] leaves and its biotransformation into typhasterol
1994
Abe, H. (Tokyo Univ. of Agriculture and Technology, Fuchu (Japan)) | Honjo, C. | Kyokawa, Y. | Asakawa, S. | Natsume, M. | Narushima, M.
3-Oxo TE has been assumed to be involved as a biosynthetic intermediate in the epimerization of the C-3 hydroxyl group of teasterone to typhasterol. We have isolated and identified it in lily anthers by using normal-phase HPLC. Mass spectral analysis, chemical synthesis, and identification of the biotransformation product by lily cell cultures confirmed it to be 3-oxo TE. Reduction of this compound stereoselectively transformed it into typhasterol in cell cultures. It is suggested that 3-oxo TE is distributed widely in the plant kingdom as a biosynthetic intermediate from TE to TY
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