Purification of cinnamoyl-C-glyoside chromone
First Claim
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1. A method for purifying 8-C-β
- -D- 2-O-(E)-cinnamoyl!glycopyranosyl-2- (R)-2-hydroxy!propyl-7-methoxy-5-methyl-chromone (the "540 compound"), comprising the steps of;
(a) contacting a decolorizing agent, which has been obtained from the processing of a slurry of an aloe leaf extract, with an organic solvent to extract the absorbed 540 compound from the decolorizing agent into the organic solvent, thereby forming a mixture of decolorizing agent and organic solvent containing the 540 compound; and
(b) separating the decolorizing agent from the organic solvent to yield a solution highly enriched in compound 540.
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Abstract
The present invention provides a process for purifying the cinnamoyl-C-glycoside, 8-C-β-D- 2-O-(E)-cinnamoyl!glycopyranosyl-2- (R)-2-hydroxy!propyl-7-methoxy-5-methyl-chromone, referred to herein as the "540 compound." In one embodiment of the present invention the 540 compound is purified by extraction from a decolorizing agent with an organic solvent. The extracted product can be further purified by high pressure liquid chromatography. In a second embodiment crude 540 compound, which has not been treated with a decolorizing agent, is purified by passage over neutral alumina or sephadex.
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Citations
19 Claims
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1. A method for purifying 8-C-β
- -D- 2-O-(E)-cinnamoyl!glycopyranosyl-2- (R)-2-hydroxy!propyl-7-methoxy-5-methyl-chromone (the "540 compound"), comprising the steps of;
(a) contacting a decolorizing agent, which has been obtained from the processing of a slurry of an aloe leaf extract, with an organic solvent to extract the absorbed 540 compound from the decolorizing agent into the organic solvent, thereby forming a mixture of decolorizing agent and organic solvent containing the 540 compound; and (b) separating the decolorizing agent from the organic solvent to yield a solution highly enriched in compound 540. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
- -D- 2-O-(E)-cinnamoyl!glycopyranosyl-2- (R)-2-hydroxy!propyl-7-methoxy-5-methyl-chromone (the "540 compound"), comprising the steps of;
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14. A method for purifying compound 540 isolated from the aloe plant comprising the steps of:
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(a) applying a solution of crude aloe extract to a pad of neutral alumina; and (b) eluting the extract with an organic solvent. - View Dependent Claims (15, 16)
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17. A method for purifying compound 540 isolated from the aloe plant comprising the steps of:
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(a) applying a solution of crude aloe extract to a Sephadex, column; and (b) eluting the extract with an organic solvent. - View Dependent Claims (18, 19)
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Specification