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Alkaloids from Toddalia aculeata.

Subhash C Jain1, Mukesh K Pandey, Ravi K Upadhyay

  • 1Department of Chemistry, University of Delhi, Delhi 110 007, India. jainsc48@hotmail.com

Phytochemistry
|May 2, 2006
PubMed
Summary

Two new alkaloids were identified in Toddalia aculeata extracts. Their chemical structures were determined using advanced spectroscopic methods, including 2D NMR techniques.

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Area of Science:

  • Phytochemistry
  • Natural Product Chemistry
  • Organic Chemistry

Background:

  • Toddalia aculeata is a plant species known for its traditional medicinal uses.
  • The isolation and characterization of bioactive compounds from medicinal plants are crucial for drug discovery.

Purpose of the Study:

  • To isolate and elucidate the structures of chemical constituents from Toddalia aculeata leaves and stems.
  • To identify novel alkaloids and other compounds from this plant species.

Main Methods:

  • Extraction of plant material using dichloromethane:methanol (1:1) and methanol solvents.
  • Structure elucidation using comprehensive spectral analyses, including 1D and 2D Nuclear Magnetic Resonance (NMR) techniques such as (1)H-(1)H COSY, (1)H-(13)C COSY, and Heteronuclear Multiple Bond Correlation (HMBC).

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Main Results:

  • Two alkaloids, N-methyl-4-hydroxy-7-methoxy-3-(2,3-epoxy-3-methylbutyl)-1H-quinolin-2-one (1) and 3-(2,3-dihydroxy-3-methylbutyl)-4,7-dimethoxy-1-methyl-1H-quinolin-2-one (2a), were isolated and characterized.
  • The structures of these two alkaloids, along with 15 other known compounds, were confirmed.
  • Three of the isolated compounds represent new findings for the Toddalia genus.

Conclusions:

  • The study successfully identified and characterized two novel alkaloids from Toddalia aculeata.
  • The findings contribute to the phytochemical knowledge of the Toddalia genus and may provide a basis for further pharmacological investigations.