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Studies on the relative reactivity of three hydroxyl groups in aconitine
- Source :
- Journal of Asian natural products research. 14(7)
- Publication Year :
- 2012
-
Abstract
- The relative reactivity of three hydroxyl groups in aconitine toward acetylation, chlorination, sulfonylation, and oxidation has been studied in this paper. The reduction of C-3 ketone and C-15 ketone derivatives of aconitine was also investigated. It was found that (1) the relative reactivity of three hydroxyl groups toward acetylation, chlorination, and sulfonylation is 3-OH13-OH15-OH; (2) 3-OH is much more reactive than 15-OH toward oxidation; and (3) reduction of the carbonyl group at C-3 with NaBH(4) generated a pair of C-3 epimers, while the reduction products of the carbonyl group at C-15 depend largely on the specific reducing agent and the absolute configuration of 16-OCH(3). When the substrate has 16β-OCH(3), its carbonyl group at C-15 can be reduced with NaBH(4) to yield exclusively the 15α-OH-containing product. Upon replacement of reducing agent NaBH(4) with LiAlH(4), the C-15 carbonyl group can be reduced to yield a pair of C-15 epimers. On the other hand, when the substrate has 16α-OCH(3), C-15 carbonyl group can only be reduced to generate 15α-OH-containing product.
- Subjects :
- Ketone
Reducing agent
Aconitine
Pharmaceutical Science
Analytical Chemistry
chemistry.chemical_compound
Drug Discovery
Organic chemistry
Reactivity (chemistry)
Pharmacology
chemistry.chemical_classification
Molecular Structure
Hydroxyl Radical
Organic Chemistry
Absolute configuration
Substrate (chemistry)
Stereoisomerism
General Medicine
Ketones
Complementary and alternative medicine
chemistry
Yield (chemistry)
Molecular Medicine
Epimer
Oxidation-Reduction
Subjects
Details
- ISSN :
- 14772213
- Volume :
- 14
- Issue :
- 7
- Database :
- OpenAIRE
- Journal :
- Journal of Asian natural products research
- Accession number :
- edsair.doi.dedup.....885756e4cc62cda30b98b58d3e89fdf2