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Alkaloids from Haplophyllum tuberculatum.

A J Al-Rehaily1, T A Al-Howiriny, M S Ahmad

  • 1Department of Pharmacognosy, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia. ajalreha@ksu.edu.sa

Phytochemistry
|June 8, 2001
PubMed
Summary

Researchers identified two new alkaloids, haplotubinone and haplotubine, from Haplophyllum tuberculatum. This study also confirmed the presence of diphyllin and a novel amide compound, advancing our knowledge of this plant's chemical constituents.

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Area of Science:

  • Phytochemistry
  • Natural Product Chemistry
  • Organic Chemistry

Background:

  • Haplophyllum tuberculatum is a plant species known for its diverse chemical profile.
  • Alkaloids and lignans are classes of natural products with significant biological activities.
  • Previous research has indicated the presence of various bioactive compounds in Haplophyllum species.

Purpose of the Study:

  • To isolate and characterize new chemical constituents from the aerial parts of Haplophyllum tuberculatum.
  • To elucidate the structures of newly discovered alkaloids using spectroscopic and crystallographic techniques.
  • To identify known compounds and novel amide derivatives within the plant extract.

Main Methods:

  • Extraction and isolation of compounds from Haplophyllum tuberculatum aerial parts.

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  • Structure elucidation using advanced spectroscopic methods (NMR, MS).
  • X-ray crystallographic analysis for definitive structural confirmation of haplotubinone.

    • Main Results:

    • Two new alkaloids, haplotubinone and haplotubine, were successfully isolated and characterized.
    • The known lignan diphyllin was identified in the plant extract.
    • The amide N-(2-phenylethyl)-benzamide was identified for the first time in this source.

    Conclusions:

    • The chemical investigation of Haplophyllum tuberculatum yielded two novel alkaloids and a previously unreported amide.
    • The structural determination relied on comprehensive spectroscopic data and X-ray crystallography.
    • This study expands the known phytochemical inventory of Haplophyllum tuberculatum, contributing to natural product research.