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Intramolecular transacetylation in salvinorins D and E
Lukasz M Kutrzeba1, Xing-Cong Li, Yuanqing Ding
1Department of Pharmacognosy, School of Pharmacy, University of Mississippi, University, Mississippi 38677-1848, USA.
Journal of Natural Products
|March 27, 2010
Summary
Salvia divinorum leaves contain salvinorins E and D, which are precursors to the hallucinogen salvinorin A. These compounds spontaneously interconvert between isomers through a transacetylation process.
Area of Science:
- Natural Product Chemistry
- Phytochemistry
- Medicinal Chemistry
Background:
- Salvia divinorum produces salvinorin A, a potent hallucinogen.
- Salvinorins E and D are identified as potential precursors in salvinorin A biosynthesis.
- Understanding the chemical dynamics of these compounds is crucial for biosynthesis studies.
Purpose of the Study:
- To investigate the relationship between salvinorins E and D.
- To elucidate the mechanism of their interconversion.
- To characterize these compounds as potential biosynthesis precursors.
Main Methods:
- Extraction of fresh Salvia divinorum leaves.
- High-Performance Liquid Chromatography (HPLC) for purification.
- Nuclear Magnetic Resonance (1H NMR) spectroscopy for compound identification.
Main Results:
- Salvinorins E and D were isolated from Salvia divinorum.
- An equilibrium between salvinorin E and its regioisomer, salvinorin D, was observed in a 3:5 ratio.
- The interconversion was identified as a dynamic intramolecular transacetylation process.
Conclusions:
- Salvinorins E and D are key intermediates in salvinorin A biosynthesis.
- A spontaneous transacetylation mechanism drives the isomer equilibrium.
- Further research can explore the implications for Salvia divinorum pharmacology.
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