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Method of extracting and isolation flavonoids from euphorbia cuneata

a technology of euphorbia cuneata and extracting flavonoids, which is applied in the field of extracting and separating flavonoids from euphorbia cuneata, can solve the problems of many side effects and poisonous latex

Inactive Publication Date: 2014-09-25
KING SAUD UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention provides a flexible method for isolating active compounds from natural materials that have antiulcerogenic properties. The method involves using a natural material, Euphorbia cuneata, and obtaining the desired compounds through a simple and flexible purification process. The technical effect of this invention is to provide a flexible method for isolating antiulcerogenic active compounds from natural materials.

Problems solved by technology

The use of plants as a therapeutic agent is well known from the previous decades, however, when man developed synthesized drugs led to many side effects.
The latex is poisonous in some species and many of them contain irritant and pesticidal substances.

Method used

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  • Method of extracting and isolation flavonoids from euphorbia cuneata

Examples

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example 1

[0044]Recovery of plant materials: The aerial parts of E. cuneata (Euphorbiaceae) were collected during flowering stage in 2010, from Desert of Saudi Arabia. The sample was kindly identified by Dr. M. Gebali, botanist and by comparison with the published plant description (El-Gohary, 2004). Plant material was air-dried in shade, reduced to fine powder, packed in tightly closed containers and stored for phytochemical and biological studies.

example 2

[0045]Phytochemical screening: Powdered samples of the aerial parts of Euphorbia cuneata, Vahl were subjected to preliminary phytochemical screening according to the published methods (Awaad, 2009).

example 3

[0046]Extraction: One kilogram of the air dried powder of E. cuneata (aerial parts) was extracted by percolation in 90% ethanol at room temperature for two days and subsequent filtration. The residue was re-percolated again. The combined ethanol extracts were concentrated under reduced pressure at a temperature not exceeding 35° C. to yield a dry extract (290 g). Water (400 ml) was added and the resultant mixture successively extracted with diethyl ether, chloroform, ethyl acetate, and n-butanol respectively. Each extract was dried over anhydrous sodium sulphate, and concentrated under reduced pressure at a temperature not exceeding 35° C. to yield dry extracts (5.5, 6, 18.5 and 60 g) respectively. All extracts were tested for their antiulcerogenic and antioxidant activities. The ethyl acetate and n-butanol extracts were the most effective extracts.

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Abstract

The present invention relates to methods to isolate flavonoids from Euphorbia cuneata, and a pharmaceutical composition comprising the flavonoids or the extracts or both of them for a use as anti-ulcer agent. The present invention further relates to a method to isolate a compound selected from the group consisting of 4′-methoxy-luteolin-7-O-rhamnoglucoside and / or aromadendrin from Euphorbia cuneata.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS [0001]The present application is a division of and claims priority under 35 U.S.C. §§120 and 121 to co-pending U.S. application Ser. No. 13 / 544,044, filed 9 Jul. 2012, which in turn claims priority under 35 U.S.C. §119 to European Application No. 11182357.1, filed 22 Sep. 2011, the entirety of each of which is hereby incorporated herein by reference. The present application is also related to U.S. application Ser. No. ______, filed of even date herewith, Attorney Docket No. BOEHP0107USB, which in turn claims priority under 35 U.S.C. §119 to European Application No. 11182357.1, filed, 22 Sep. 2011. U.S. application Ser. No. ______, filed of even date herewith, is hereby incorporated herein by reference.[0002]The present invention relates to flavonoids isolated from Euphorbia cuneata, a method for isolation thereof, extracts from Euphorbia cuneata and a pharmaceutical composition comprising the flavonoids or the extracts or both of them.INTRODUC...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): C07H17/07C07D311/40
CPCA61K31/7048A61K36/47A61K2236/30C07H17/07A61K31/352C07D311/40A61K31/353A61P1/04
Inventor AWAAD, AMANI S.EL-MELIGY, REHAM MOUSTAFA
Owner KING SAUD UNIVERSITY
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