Abstract
Together with the expected mono‐oxidized taxa‐4(20),11(12)‐diene‐5‐ol (1) and taxa‐4(5),11,20‐diene‐20‐ol (2), a new taxane skeleton, 3,12‐cyclotaxane (3), was obtained from chemical oxidation of taxadiene by selenium dioxide/t‐butylhydroperoxide.
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Acknowledgment
We thank the Robert A. Welch Foundation and the Texas Advanced Technology Program for financial support and Rodney Croteau for a gift of the gene‐encoding taxadiene synthase.