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N-Methyl-isosalsoline from Hammada scoparia.

Raoudha Mezghani Jarraya, Amira Bouaziz, Besma Hamdi

Acta Crystallographica. Section E, Structure Reports Online

|January 5, 2011

Summary

A novel isoquinoline alkaloid from Hammada scoparia leaves was identified. Its chemical structure was determined using NMR and X-ray crystallography, revealing an intermolecular hydrogen bond.

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Area of Science:

Natural Product Chemistry
Organic Chemistry
Crystallography

Background:

Hammada scoparia is a plant source of potentially bioactive compounds.
Isoquinoline alkaloids represent a significant class of natural products with diverse pharmacological activities.
Characterization of novel plant-derived alkaloids contributes to ethnobotanical and medicinal chemistry knowledge.

Purpose of the Study:

To isolate and characterize a major alkaloid from Hammada scoparia leaves.
To elucidate the chemical structure and stereochemistry of the isolated compound.
To investigate the intermolecular interactions in the crystal state.

Main Methods:

Extraction and isolation of alkaloids from Hammada scoparia.
Nuclear Magnetic Resonance (NMR) spectroscopy for structural elucidation.
X-ray crystallographic analysis to determine the solid-state structure.

Main Results:

A major alkaloid, 1,2-dimethyl-6-methoxy-1,2,3,4-tetrahydro-isoquinolin-7-ol, was isolated.
The compound's structure was confirmed by NMR and X-ray crystallography.
An intermolecular O-H⋯N hydrogen bond was identified in the crystal structure.
The absolute configuration could not be reliably determined.

Conclusions:

The study successfully identified and characterized a novel isoquinoline alkaloid from Hammada scoparia.
The crystal structure reveals specific intermolecular interactions, providing insights into its solid-state behavior.
Further research may explore the biological activity and synthetic potential of this compound.