Showing papers by "Jon Clardy published in 1983"
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TL;DR: In this article, the stereochemistry of two previously reported transformation products of qinghaosu were discussed and the structures of two other products, 3 and 9, were also presented.
43 citations
TL;DR: Iron (Fe3+) controls production of toxin by this fungus and reacts with the toxin to yield a colored product which aids in its detection on chromatograms and in its quantitative estimation by colorimetry.
Abstract: Certain isolates of the plant-pathogenic fungus Stemphylium botryosum produce a phytotoxin, stemphyloxin I. This toxin (C(21)H(34)O(6)) was crystallized and its structure was determined by x-ray crystallography to be a beta-ketoaldehyde trans-Decalin. This compound is a highly unusual natural product. Iron (Fe(3+)) controls production of toxin by this fungus. Furthermore, iron reacts with the toxin to yield a colored product which aids in its detection on chromatograms and in its quantitative estimation by colorimetry.;
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TL;DR: In this article, the isolation of chilenone A from Laurencia chilensis and the determination of its structure by spectral and x-ray crystallographic techniques is described.
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TL;DR: Schisanlactone A, a triterpenoid isolated from a Schisandra sp., is shown to possess structure 2. The structure was assigned on the basis of spectroscopic studies and was confirmed by X-ray diffraction studies as mentioned in this paper.
22 citations
TL;DR: From the digestive gland of the sea hare Aplysia dactylomela, a trioxygenated diterpene possessing the dolabellane skeleton was isolated by spectral properties and X-ray diffraction analysis.
TL;DR: The use of the title reactions for the regioselective, and stereoselectively functionalization of a range of dienylacetic acids, available from simple organoiron chemistry, is presented in this paper.