CN104529975B - Corm Eleocharitis skin extracts the method for 6-methyl luteolin - Google Patents
Corm Eleocharitis skin extracts the method for 6-methyl luteolin Download PDFInfo
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- VSHICDFQSGJNPK-UHFFFAOYSA-N 2-(3,4-dihydroxyphenyl)-5,7-dihydroxy-6-methylchromen-4-one Chemical compound C=1C(=O)C2=C(O)C(C)=C(O)C=C2OC=1C1=CC=C(O)C(O)=C1 VSHICDFQSGJNPK-UHFFFAOYSA-N 0.000 title claims abstract description 81
- 239000000284 extract Substances 0.000 title claims abstract description 41
- 238000000034 method Methods 0.000 title claims abstract description 10
- 239000004952 Polyamide Substances 0.000 claims abstract description 25
- 238000000605 extraction Methods 0.000 claims abstract description 25
- 229920002647 polyamide Polymers 0.000 claims abstract description 25
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 claims abstract description 21
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims abstract description 14
- 238000005227 gel permeation chromatography Methods 0.000 claims abstract description 9
- 238000004440 column chromatography Methods 0.000 claims abstract description 5
- 239000000463 material Substances 0.000 claims abstract description 5
- 238000001953 recrystallisation Methods 0.000 claims abstract description 5
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 138
- 239000012043 crude product Substances 0.000 claims description 36
- 239000003480 eluent Substances 0.000 claims description 26
- 238000004809 thin layer chromatography Methods 0.000 claims description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 16
- 238000000746 purification Methods 0.000 claims description 11
- 238000000926 separation method Methods 0.000 claims description 11
- 239000000243 solution Substances 0.000 claims description 9
- 239000000725 suspension Substances 0.000 claims description 9
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 8
- 239000007864 aqueous solution Substances 0.000 claims description 8
- WORJEOGGNQDSOE-UHFFFAOYSA-N chloroform;methanol Chemical compound OC.ClC(Cl)Cl WORJEOGGNQDSOE-UHFFFAOYSA-N 0.000 claims description 8
- 239000000047 product Substances 0.000 claims description 8
- 239000000706 filtrate Substances 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 6
- 238000001514 detection method Methods 0.000 claims description 4
- 235000019441 ethanol Nutrition 0.000 claims description 4
- 238000012856 packing Methods 0.000 claims description 3
- 241000196324 Embryophyta Species 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 3
- 238000011031 large-scale manufacturing process Methods 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 239000002994 raw material Substances 0.000 abstract description 2
- 239000002699 waste material Substances 0.000 abstract description 2
- 235000005853 Cyperus esculentus Nutrition 0.000 abstract 1
- 241000103725 Cyperus esculentus var. esculentus Species 0.000 abstract 1
- 239000010903 husk Substances 0.000 abstract 1
- 239000002904 solvent Substances 0.000 abstract 1
- 238000007654 immersion Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 238000001644 13C nuclear magnetic resonance spectroscopy Methods 0.000 description 2
- 238000005160 1H NMR spectroscopy Methods 0.000 description 2
- OKKJLVBELUTLKV-MZCSYVLQSA-N Deuterated methanol Chemical compound [2H]OC([2H])([2H])[2H] OKKJLVBELUTLKV-MZCSYVLQSA-N 0.000 description 2
- 230000000844 anti-bacterial effect Effects 0.000 description 2
- 230000000259 anti-tumor effect Effects 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 238000002330 electrospray ionisation mass spectrometry Methods 0.000 description 2
- 206010010774 Constipation Diseases 0.000 description 1
- 206010011224 Cough Diseases 0.000 description 1
- 241000234646 Cyperaceae Species 0.000 description 1
- 235000014309 Eleocharis tuberosa Nutrition 0.000 description 1
- 244000103152 Eleocharis tuberosa Species 0.000 description 1
- 206010062717 Increased upper airway secretion Diseases 0.000 description 1
- 206010068319 Oropharyngeal pain Diseases 0.000 description 1
- 201000007100 Pharyngitis Diseases 0.000 description 1
- 208000004880 Polyuria Diseases 0.000 description 1
- 208000018569 Respiratory Tract disease Diseases 0.000 description 1
- 206010043458 Thirst Diseases 0.000 description 1
- 235000004869 Tussilago farfara Nutrition 0.000 description 1
- 240000000377 Tussilago farfara Species 0.000 description 1
- 239000013543 active substance Substances 0.000 description 1
- 230000003064 anti-oxidating effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 230000035619 diuresis Effects 0.000 description 1
- 208000001848 dysentery Diseases 0.000 description 1
- 206010013990 dysuria Diseases 0.000 description 1
- 229930003935 flavonoid Natural products 0.000 description 1
- 150000002215 flavonoids Chemical class 0.000 description 1
- 235000017173 flavonoids Nutrition 0.000 description 1
- 230000000968 intestinal effect Effects 0.000 description 1
- 150000002659 luteolin Chemical class 0.000 description 1
- 208000026435 phlegm Diseases 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D311/00—Heterocyclic compounds containing six-membered rings having one oxygen atom as the only hetero atom, condensed with other rings
- C07D311/02—Heterocyclic compounds containing six-membered rings having one oxygen atom as the only hetero atom, condensed with other rings ortho- or peri-condensed with carbocyclic rings or ring systems
- C07D311/04—Benzo[b]pyrans, not hydrogenated in the carbocyclic ring
- C07D311/22—Benzo[b]pyrans, not hydrogenated in the carbocyclic ring with oxygen or sulfur atoms directly attached in position 4
- C07D311/26—Benzo[b]pyrans, not hydrogenated in the carbocyclic ring with oxygen or sulfur atoms directly attached in position 4 with aromatic rings attached in position 2 or 3
- C07D311/40—Separation, e.g. from natural material; Purification
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D311/00—Heterocyclic compounds containing six-membered rings having one oxygen atom as the only hetero atom, condensed with other rings
- C07D311/02—Heterocyclic compounds containing six-membered rings having one oxygen atom as the only hetero atom, condensed with other rings ortho- or peri-condensed with carbocyclic rings or ring systems
- C07D311/04—Benzo[b]pyrans, not hydrogenated in the carbocyclic ring
- C07D311/22—Benzo[b]pyrans, not hydrogenated in the carbocyclic ring with oxygen or sulfur atoms directly attached in position 4
- C07D311/26—Benzo[b]pyrans, not hydrogenated in the carbocyclic ring with oxygen or sulfur atoms directly attached in position 4 with aromatic rings attached in position 2 or 3
- C07D311/28—Benzo[b]pyrans, not hydrogenated in the carbocyclic ring with oxygen or sulfur atoms directly attached in position 4 with aromatic rings attached in position 2 or 3 with aromatic rings attached in position 2 only
- C07D311/30—Benzo[b]pyrans, not hydrogenated in the carbocyclic ring with oxygen or sulfur atoms directly attached in position 4 with aromatic rings attached in position 2 or 3 with aromatic rings attached in position 2 only not hydrogenated in the hetero ring, e.g. flavones
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Medicines Containing Plant Substances (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The Corm Eleocharitis skin of the present invention extracts the method for 6-methyl luteolin, belong to field of natural organic chemistry, it is characterized in that, with aqueous acetone solution for solvent, the 6-methyl luteolin in extraction of chufa husk, after extract is extracted with ethyl acetate, in extract warp, pressure MCI column chromatography separates with polyamide column chromatography, then purify by SephadexLH-20 gel chromatography, through recrystallization after, it is thus achieved that content 6-methyl luteolin product more than 95%.The present invention opens and extracts the new way separating 6-methyl luteolin from natural plants; good separating effect; product purity is high; make the Corm Eleocharitis skin being always considered garbage turn waste into wealth, selected chromatographic material MCI, polyamide and gel all can Reusability, raw material is easy to get; aboundresources; production cost is low, can carry out large-scale production, meet medical industry needs.
Description
Technical field
The invention belongs to field of natural organic chemistry, relate to the extraction separation method of a kind of 6-methyl luteolin, particularly relate to a kind of method carrying middle extraction separation 6-methyl luteolin from Corm Eleocharitis skin.
Background technology
6-methyl luteolin (6-Methylluteolin), yellow crystals, chemistry 6-methyl-5 by name, 7,3 ', 4 '-kaempferol, for the C-methylated derivative of luteolin.This flavonoids has multiple pharmacologically active, such as antioxidation, antibacterial, antitumor etc..6-methyl luteolin structure is unique, and distributed in nature is few, and pertinent literature is also few, and people obtain usually by synthesis.Currently without finding the extraction and separation technology introduction about 6-methyl luteolin.
Corm Eleocharitis (Eleocharistuberosa), also known as Horse hoof, belongs to the underground bulb of the perennial shallow water herbaceous plant Corm Eleocharitis of Cyperaceae, and China's most area has cultivation.Wherein, Guangxi Corm Eleocharitis yield accounts for the whole nation 70%, and He Prefecture Corm Eleocharitis yield accounts for Guangxi 70%.According to the literature, Corm Eleocharitis have antibacterial, antitumor, prevent and treat respiratory tract disease, the effect such as profit intestinal relieving constipation and diuresis row's pouring；Can be clinically used for treatment have sore throat, the disease such as phlegm-heat cough, calentura excessive thirst, dysuria, dysentery.Research shows, the active substance of Corm Eleocharitis is mainly enriched between peel and sarcocarp.In the Corm Eleocharitis course of processing, the Corm Eleocharitis cortex amount being dropped accounts for the 25% of fresh Corm Eleocharitis quality, and resource is very abundant.We find containing 6-methyl luteolin in Corm Eleocharitis skin under study for action, but have no at present and extract the bibliographical information separating this compound from Corm Eleocharitis skin.
Summary of the invention
It is an object of the invention to: propose a kind of method that Corm Eleocharitis skin extracts 6-methyl luteolin.
6-methyl luteolin, its chemical structural formula is as follows:
The Corm Eleocharitis skin of the present invention extracts the method for 6-methyl luteolin, and application traditional extraction method and MCI, polyamide and gel chromatography technology extract separation 6-methyl luteolin from Corm Eleocharitis skin, specifically comprise the following steps that
(1) by air-dry for fresh Corm Eleocharitis skin, pulverize, standby；By weight, weigh 1 part of Corm Eleocharitis corium farinosum end, add in extraction pot, add the aqueous acetone solution of 4-10 part 70% percent by volume every time, at 25 DEG C, soak 24h, soak 3 times, filter, merging filtrate, be evaporated to paste, it is thus achieved that extract.
(2) by weight, extract 1 part is dispersed in 5 parts of water and makes suspension, with the extraction into ethyl acetate 3 times of 1-2 times of water volume, combining extraction liquid, be evaporated to dry, it is thus achieved that extract.
(3) in extract, methanol is added to being completely dissolved, sample is mixed with the polyamide of 2-4 times of extract quality, methanol is evaporated into dry, dress post, connects MCI post and carries out middle pressure separation, with the methanol aqueous solution of 40-100% percent by volume for eluent gradient eluting, thin layer chromatography detects, collect and merge the eluent that mobile phase concentration is 70-90% percent by volume, concentrating under reduced pressure, it is thus achieved that crude product A.
(4) in crude product A, methanol is added to being completely dissolved, sample is mixed with the polyamide of 2-4 times of quality, methanol is evaporated into dry, proceed to polyamide chromatographic column to be easily separated, with the chloroform-methanol eluting that volume ratio is 3:1-1:1, thin layer chromatography detects, and collects and merges the eluent containing 6-methyl luteolin, concentrating under reduced pressure, it is thus achieved that crude product B.
(5) by weight, crude product B1 part is dissolved in 4-8 part methanol, the water of the methanol volumes such as addition makes suspension, with SephadexLH-20 gel chromatography column purification, by methanol-eluted fractions, thin layer chromatography detects, and collects and merges the eluent containing 6-methyl luteolin, concentrating under reduced pressure, it is thus achieved that crude product C.
(6) by gained crude product C through methanol or ethyl alcohol recrystallization, dry, it is thus achieved that content reaches the 6-methyl luteolin product of more than 95%.
Described MCI post specification in described step (3) is 70 × 460mm, and packing material is MCI-gelCHP-20P, and column chromatography condition is: post pressure is 80Psi, and flow rate of mobile phase is 50mL/min, and detection wavelength is 245nm；Described mobile phase is the methanol aqueous solution of 40-100% percent by volume.
Polyamide described in described step (4), specification is 200-300 order；Eluent used is volume ratio is the chloroform-methanol of 3:1-1:1.
Compared with prior art it provides the benefit that the present invention: design science is reasonable; open from natural plants, extract the new way separating 6-methyl luteolin; good separating effect, product purity is high, makes the Corm Eleocharitis skin being always considered garbage turn waste into wealth; selected chromatographic material MCI, polyamide and gel all can Reusabilities; raw material is easy to get, aboundresources, and production cost is low; large-scale production can be carried out, meet medical industry needs.
Detailed description of the invention
Below in conjunction with embodiment, the invention will be further described, but embodiments of the present invention are not limited to this.
The Corm Eleocharitis skin of the present invention extracts the method for 6-methyl luteolin, and application traditional extraction method and MCI, polyamide and gel chromatography technology extract separation 6-methyl luteolin from Corm Eleocharitis skin, specifically comprise the following steps that
(1) by air-dry for fresh Corm Eleocharitis skin, pulverize, standby.The Corm Eleocharitis corium farinosum end weighing certain mass (g) adds in extraction pot, adds the aqueous acetone solution of 70% percent by volume of 4-10 times of volume (mL), soaks 24h at 25 DEG C, soak 3 times, filter, merging filtrate, it is evaporated to paste, it is thus achieved that extract.
(2) extract (g) is dispersed in the water of 5 times of volumes (mL) and makes suspension, with the extraction into ethyl acetate 3 times of 1-2 times of water volume, combining extraction liquid, be evaporated to dry, it is thus achieved that extract.
(3) in extract, methanol is added to being completely dissolved, sample is mixed with the polyamide of 2-4 times of extract quality, methanol is evaporated into dry, dress post, connect MCI post and carry out middle pressure separation, post specification is 70mm × 460mm, packing material is the MCI-gelCHP-20P that Mitsubishi chemical company produces, column chromatography condition is: post pressure is 80Psi, flow rate of mobile phase is 50mL/min, detection wavelength is 254nm, with the methanol aqueous solution of 40-100% percent by volume for eluent gradient eluting, eluate concentration is regulated according to detection peak situation of change, collect by every part of 500mL, thin layer chromatography detects, collect and merge the eluent that mobile phase concentration is 70-90% percent by volume, concentrating under reduced pressure, obtain crude product A.
(4) in crude product A, methanol is added to being completely dissolved, sample is mixed with the polyamide of 2-4 times of quality, methanol is evaporated into dry, proceed to polyamide chromatographic column to be easily separated, with the chloroform-methanol eluting that volume ratio is 3:1-1:1, thin layer chromatography detects, and collects and merges the eluent containing 6-methyl luteolin, concentrating under reduced pressure, it is thus achieved that crude product B.
(5) crude product B (g) is dissolved in the methanol of 4-8 times of volume (mL), the water of the methanol volumes such as addition makes suspension, the SephadexLH-20 gel chromatography column purification produced with AmershamPharmaciaBiotech company of Sweden, by methanol-eluted fractions, thin layer chromatography detects, collect and merge the eluent containing 6-methyl luteolin, concentrating under reduced pressure, it is thus achieved that crude product C.
(6) by gained crude product C through methanol or ethyl alcohol recrystallization purification, dry, it is thus achieved that content reaches the 6-methyl luteolin product of more than 95%.
Embodiment 1
Being added in extraction pot by fresh for 8kg Corm Eleocharitis corium farinosum end, add the aqueous acetone solution of 32L70% percent by volume, soak 24h at 25 DEG C, total immersion is steeped 3 times, filters, merging filtrate, concentrating under reduced pressure paste, it is thus achieved that extract 1.05kg.
Extract is added in 5.0L water and make turbid solution, with 5.0L extraction into ethyl acetate 3 times, combining extraction liquid, concentrating under reduced pressure, it is thus achieved that extract 120g.
In extract, add 300mL methanol dissolve, sample is mixed with 260g polyamide, methanol is evaporated into dry, fill post, connect MCI post and carry out middle pressure separation, it is eluent gradient eluting with the methanol aqueous solution of 40-100% percent by volume, collecting by every part of 500mL, thin layer chromatography detects, and collects and merges the eluent that mobile phase concentration is 70-90% percent by volume, concentrating under reduced pressure, it is thus achieved that crude product A31g.
Crude product A is dissolved in 90mL methanol, adds 60g polyamide and mix sample, by dry for methanol volatilization, proceeding to polyamide column to be easily separated, with the chloroform-methanol eluting that volume ratio is 2:1, thin layer chromatography detects, collect and merge the eluent containing 6-methyl luteolin, concentrating under reduced pressure, it is thus achieved that crude product B1.1g.
Crude product B is dissolved in the methanol of 5.0mL, adds 5.0mL water and make suspension, with SephadexLH-20 gel chromatography column purification, by methanol-eluted fractions, thin layer chromatography detects, and collects and merges the eluent containing 6-methyl luteolin, concentrating under reduced pressure, it is thus achieved that crude product C0.12g.
By gained crude product C through recrystallizing methanol purification, dry, it is thus achieved that the 6-methyl luteolin product 8.0mg of content 95.4%.
Embodiment 2
Being added in extraction pot by fresh for 8kg Corm Eleocharitis corium farinosum end, add the aqueous acetone solution of 32L70% percent by volume, soak 24h at 25 DEG C, total immersion is steeped 3 times, filters, merging filtrate, concentrating under reduced pressure paste, it is thus achieved that extract 1.05kg.
Extract is added in 5.0L water and make turbid solution, with 5.0L extraction into ethyl acetate 3 times, combining extraction liquid, concentrating under reduced pressure, it is thus achieved that extract 120g.
In extract, add 300mL methanol dissolve, sample is mixed with 260g polyamide, methanol is evaporated into dry, fill post, connect MCI post and carry out middle pressure separation, it is eluent gradient eluting with the methanol aqueous solution of 40-100% percent by volume, collecting by every part of 500mL, thin layer chromatography detects, and collects and merges the eluent that mobile phase concentration is 70-90% percent by volume, concentrating under reduced pressure, it is thus achieved that crude product A31g.
Crude product A is dissolved in 90mL methanol, add 60g polyamide and mix sample, by dry for methanol volatilization, proceed to polyamide column to be easily separated, with the chloroform-methanol eluting that volume ratio is 2.5:1, thin layer chromatography detects, and collects and merges the eluent containing 6-methyl luteolin, concentrating under reduced pressure, it is thus achieved that crude product B0.95g.
Crude product B is dissolved in the methanol of 5.0mL, adds 5.0mL water and make suspension, with SephadexLH-20 gel chromatography column purification, by methanol-eluted fractions, thin layer chromatography detects, and collects and merges the eluent containing 6-methyl luteolin, concentrating under reduced pressure, it is thus achieved that crude product C0.10g.
By gained crude product C through ethyl alcohol recrystallization purification, dry, it is thus achieved that the 6-methyl luteolin product 9.5mg of content 96.0%.
Embodiment 3
Being added in extraction pot by fresh for 8kg Corm Eleocharitis corium farinosum end, add the aqueous acetone solution of 32L70% percent by volume, soak 24h at 25 DEG C, total immersion is steeped 3 times, filters, merging filtrate, concentrating under reduced pressure paste, it is thus achieved that extract 1.05kg.
Extract is added in 5.0L water and make turbid solution, with 5.0L extraction into ethyl acetate 3 times, combining extraction liquid, concentrating under reduced pressure, it is thus achieved that extract 120g.
In extract, add 300mL methanol dissolve, sample is mixed with 260g polyamide, methanol is evaporated into dry, fill post, connect MCI post and carry out middle pressure separation, it is eluent gradient eluting with the methanol aqueous solution of 40-100% percent by volume, collecting by every part of 500mL, thin layer chromatography detects, and collects and merges the eluent that mobile phase concentration is 70-90% percent by volume, concentrating under reduced pressure, it is thus achieved that crude product A31g.
Crude product A is dissolved in 90mL methanol, add 60g polyamide and mix sample, by dry for methanol volatilization, proceed to polyamide column to be easily separated, with the chloroform-methanol eluting that volume ratio is 1:1, thin layer chromatography detects, and collects and merges the eluent containing 6-methyl luteolin, concentrating under reduced pressure, it is thus achieved that crude product B1.25g.
Crude product B is dissolved in the methanol of 15.0mL, adds 15.0mL water and make suspension, with SephadexLH-20 gel chromatography column purification, by methanol-eluted fractions, thin layer chromatography detects, and collects and merges the eluent containing 6-methyl luteolin, concentrating under reduced pressure, it is thus achieved that crude product C115mg.
By gained crude product C through recrystallizing methanol purification, dry, it is thus achieved that the 6-methyl luteolin product 7.0mg of content 98.1%.
Products obtained therefrom warp1H-NMR、13C-NMR and ESIMS confirms structure.Spectral data confirms, what institute's extraction purification obtained is 6-methyl luteolin, and its chemical structural formula is as follows:
6-methyl luteolin, yellow crystals.1HNMR(400MHz,Methanol-d4)δ:6.45(s,H-3),6.49(s,H-8),7.34(brs,H-2′),6.88(brs,H-5′),7.34(brs,H-6′),2.03(s,3H,CH3-6)；13CNMR(125MHz,Methanol-d4)δ:164.1(s,C-2),103.8(d,C-3),183.9(s,C-4),160.1(sC-5),109.1(s,C-6),166.1(s,C-7),94.0(d,C-8),157.1(s,C-9),105.0(s,C-10),123.8(s,C-1′),114.2(d,C-2′),147.2(s,C-3′),151.1(s,C-4′),116.9(d,C-5′),120.3(d,C-6′),7.6(q,CH3-6)；ESIMS(negative-ionmode)m/z299[M–H]–。
Claims (3)
1. the method that Corm Eleocharitis skin extracts 6-methyl luteolin, it specifically comprises the following steps that
(1) by air-dry for fresh Corm Eleocharitis skin, pulverize, standby；By weight, weigh 1 part of Corm Eleocharitis corium farinosum end, add in extraction pot, add the aqueous acetone solution of 4-10 part 70% percent by volume every time, at 25 DEG C, soak 24h, soak 3 times, filter, merging filtrate, be evaporated to paste, it is thus achieved that extract；
(2) by weight, extract 1 part is dispersed in 5 parts of water and makes suspension, with the extraction into ethyl acetate 3 times of 1-2 times of water volume, combining extraction liquid, be evaporated to dry, it is thus achieved that extract；
(3) in extract, methanol is added to being completely dissolved, sample is mixed with the polyamide of 2-4 times of extract quality, methanol is evaporated into dry, dress post, connects MCI post and carries out middle pressure separation, with the methanol aqueous solution of 40-100% percent by volume for eluent gradient eluting, thin layer chromatography detects, collect and merge the eluent that mobile phase concentration is 70-90% percent by volume, concentrating under reduced pressure, it is thus achieved that crude product A；
(4) in crude product A, methanol is added to being completely dissolved, sample is mixed with the polyamide of 2-4 times of quality, methanol is evaporated into dry, proceed to polyamide chromatographic column to be easily separated, with the chloroform-methanol eluting that volume ratio is 3:1-1:1, thin layer chromatography detects, and collects and merges the eluent containing 6-methyl luteolin, concentrating under reduced pressure, it is thus achieved that crude product B；
(5) by weight, crude product B1 part is dissolved in 4-8 part methanol, the water of the methanol volumes such as addition makes suspension, with SephadexLH-20 gel chromatography column purification, by methanol-eluted fractions, thin layer chromatography detects, and collects and merges the eluent containing 6-methyl luteolin, concentrating under reduced pressure, it is thus achieved that crude product C；
(6) by gained crude product C through methanol or ethyl alcohol recrystallization, dry, it is thus achieved that content reaches the 6-methyl luteolin product of more than 95%.
2. method according to claim 1, it is characterised in that the described MCI post specification in described step (3) is 70 × 460mm, packing material is MCI-gelCHP-20P, column chromatography condition is: post pressure is 80Psi, and flow rate of mobile phase is 50mL/min, and detection wavelength is 245nm；Described mobile phase is the methanol aqueous solution of 40-100% percent by volume.
3. method according to claim 1, it is characterised in that the polyamide described in described step (4), specification is 200-300 order；Eluent used is volume ratio is the chloroform-methanol of 3:1-1:1.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101269161A (en) * | 2008-05-20 | 2008-09-24 | 贺州学院 | Technique for extracting total flavone from eleocharis dulcis trin.ex henschel husk |
| CN103087546A (en) * | 2013-01-18 | 2013-05-08 | 江汉大学 | Method for extracting pigments in eleocharis tuberose peel |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101269161A (en) * | 2008-05-20 | 2008-09-24 | 贺州学院 | Technique for extracting total flavone from eleocharis dulcis trin.ex henschel husk |
| CN103087546A (en) * | 2013-01-18 | 2013-05-08 | 江汉大学 | Method for extracting pigments in eleocharis tuberose peel |
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Application publication date: 20150422 Assignee: Guangxi Hengfengda Supply Chain Management Co.,Ltd. Assignor: HEZHOU University Contract record no.: X2023980046610 Denomination of invention: Method for Extracting 6-Methyl Luteolin from Water Chestnut Peel Granted publication date: 20160706 License type: Common License Record date: 20231108 Application publication date: 20150422 Assignee: Pingle Leyao Food Co.,Ltd. Assignor: HEZHOU University Contract record no.: X2023980046448 Denomination of invention: Method for Extracting 6-Methyl Luteolin from Water Chestnut Peel Granted publication date: 20160706 License type: Common License Record date: 20231108 |
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