NZ719709B2 - Process for the preparation of xanthohumol - Google Patents
Process for the preparation of xanthohumol Download PDFInfo
- Publication number
- NZ719709B2 NZ719709B2 NZ719709A NZ71970914A NZ719709B2 NZ 719709 B2 NZ719709 B2 NZ 719709B2 NZ 719709 A NZ719709 A NZ 719709A NZ 71970914 A NZ71970914 A NZ 71970914A NZ 719709 B2 NZ719709 B2 NZ 719709B2
- Authority
- NZ
- New Zealand
- Prior art keywords
- xanthohumol
- salt
- range
- water
- mixture
- Prior art date
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- ORXQGKIUCDPEAJ-YRNVUSSQSA-N Xanthohumol Chemical compound COC1=CC(O)=C(CC=C(C)C)C(O)=C1C(=O)\C=C\C1=CC=C(O)C=C1 ORXQGKIUCDPEAJ-YRNVUSSQSA-N 0.000 title claims abstract description 178
- 235000008209 xanthohumol Nutrition 0.000 title claims abstract description 88
- 238000000034 method Methods 0.000 title claims abstract description 32
- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- 239000002244 precipitate Substances 0.000 claims abstract description 19
- 239000000203 mixture Substances 0.000 claims abstract description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 16
- 229910052723 transition metal Inorganic materials 0.000 claims abstract description 11
- 239000012266 salt solution Substances 0.000 claims abstract description 4
- 150000003624 transition metals Chemical class 0.000 claims abstract description 4
- 235000008694 Humulus lupulus Nutrition 0.000 claims description 18
- 239000011780 sodium chloride Substances 0.000 claims description 18
- 238000000605 extraction Methods 0.000 claims description 17
- 239000000706 filtrate Substances 0.000 claims description 17
- 239000000243 solution Substances 0.000 claims description 14
- ORTQZVOHEJQUHG-UHFFFAOYSA-L Copper(II) chloride Chemical compound Cl[Cu]Cl ORTQZVOHEJQUHG-UHFFFAOYSA-L 0.000 claims description 13
- CSCPPACGZOOCGX-UHFFFAOYSA-N acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 12
- 239000002904 solvent Substances 0.000 claims description 10
- 150000003839 salts Chemical class 0.000 claims description 9
- OKKJLVBELUTLKV-UHFFFAOYSA-N methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 8
- -1 transition metal salt Chemical class 0.000 claims description 8
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 7
- ARUVKPQLZAKDPS-UHFFFAOYSA-L Copper(II) sulfate Chemical compound [Cu+2].[O-][S+2]([O-])([O-])[O-] ARUVKPQLZAKDPS-UHFFFAOYSA-L 0.000 claims description 3
- NWONKYPBYAMBJT-UHFFFAOYSA-L Zinc sulfate Chemical compound [Zn+2].[O-]S([O-])(=O)=O NWONKYPBYAMBJT-UHFFFAOYSA-L 0.000 claims description 3
- 150000001298 alcohols Chemical class 0.000 claims description 3
- 229910000366 copper(II) sulfate Inorganic materials 0.000 claims description 3
- DJWUNCQRNNEAKC-UHFFFAOYSA-L Zinc acetate Chemical compound [Zn+2].CC([O-])=O.CC([O-])=O DJWUNCQRNNEAKC-UHFFFAOYSA-L 0.000 claims description 2
- JIAARYAFYJHUJI-UHFFFAOYSA-L Zinc chloride Chemical compound [Cl-].[Cl-].[Zn+2] JIAARYAFYJHUJI-UHFFFAOYSA-L 0.000 claims description 2
- 150000003841 chloride salts Chemical class 0.000 claims description 2
- JPVYNHNXODAKFH-UHFFFAOYSA-N cu2+ Chemical class [Cu+2] JPVYNHNXODAKFH-UHFFFAOYSA-N 0.000 claims description 2
- 150000002576 ketones Chemical class 0.000 claims description 2
- 150000002823 nitrates Chemical class 0.000 claims description 2
- BDERNNFJNOPAEC-UHFFFAOYSA-N propanol Chemical compound CCCO BDERNNFJNOPAEC-UHFFFAOYSA-N 0.000 claims description 2
- 239000002994 raw material Substances 0.000 claims description 2
- 150000003467 sulfuric acid derivatives Chemical class 0.000 claims description 2
- 239000011592 zinc chloride Substances 0.000 claims description 2
- 235000005074 zinc chloride Nutrition 0.000 claims description 2
- 229960005335 propanol Drugs 0.000 claims 1
- HEMHJVSKTPXQMS-UHFFFAOYSA-M sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 12
- 241000218228 Humulus Species 0.000 description 10
- 230000000694 effects Effects 0.000 description 10
- 210000004379 Membranes Anatomy 0.000 description 7
- 239000012528 membrane Substances 0.000 description 7
- 238000004128 high performance liquid chromatography Methods 0.000 description 6
- 150000002632 lipids Chemical class 0.000 description 6
- 229940079721 Copper chloride Drugs 0.000 description 4
- WEVYAHXRMPXWCK-UHFFFAOYSA-N acetonitrile Chemical compound CC#N WEVYAHXRMPXWCK-UHFFFAOYSA-N 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 150000001875 compounds Chemical class 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000010907 mechanical stirring Methods 0.000 description 4
- 238000001556 precipitation Methods 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- FAPWRFPIFSIZLT-UHFFFAOYSA-M sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 239000007864 aqueous solution Substances 0.000 description 3
- 235000009808 lpulo Nutrition 0.000 description 3
- 102000004169 proteins and genes Human genes 0.000 description 3
- 108090000623 proteins and genes Proteins 0.000 description 3
- XUJNEKJLAYXESH-REOHCLBHSA-N L-cysteine Chemical compound SC[C@H](N)C(O)=O XUJNEKJLAYXESH-REOHCLBHSA-N 0.000 description 2
- 235000013405 beer Nutrition 0.000 description 2
- 210000004027 cells Anatomy 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- BDAGIHXWWSANSR-UHFFFAOYSA-N formic acid Chemical compound OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 description 2
- 235000019253 formic acid Nutrition 0.000 description 2
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 2
- 239000004615 ingredient Substances 0.000 description 2
- KFZMGEQAYNKOFK-UHFFFAOYSA-N iso-propanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 2
- 238000005502 peroxidation Methods 0.000 description 2
- 150000008442 polyphenolic compounds Polymers 0.000 description 2
- 235000013824 polyphenols Nutrition 0.000 description 2
- 230000001376 precipitating Effects 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 125000001424 substituent group Chemical group 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 102000002260 Alkaline Phosphatase Human genes 0.000 description 1
- 108020004774 Alkaline Phosphatase Proteins 0.000 description 1
- 206010001897 Alzheimer's disease Diseases 0.000 description 1
- 206010059512 Apoptosis Diseases 0.000 description 1
- 102000014654 Aromatase Human genes 0.000 description 1
- 108010078554 Aromatase Proteins 0.000 description 1
- 210000004556 Brain Anatomy 0.000 description 1
- 210000000170 Cell Membrane Anatomy 0.000 description 1
- 229940106705 Chlorophyll Drugs 0.000 description 1
- 229940108928 Copper Drugs 0.000 description 1
- 239000005750 Copper hydroxide Substances 0.000 description 1
- JJLJMEJHUUYSSY-UHFFFAOYSA-L Copper(II) hydroxide Chemical compound [OH-].[OH-].[Cu+2] JJLJMEJHUUYSSY-UHFFFAOYSA-L 0.000 description 1
- 229960002433 Cysteine Drugs 0.000 description 1
- 102000003915 DNA Topoisomerases Human genes 0.000 description 1
- 108090000323 DNA Topoisomerases Proteins 0.000 description 1
- 102000002148 EC 2.3.1.20 Human genes 0.000 description 1
- 108010001348 EC 2.3.1.20 Proteins 0.000 description 1
- 206010061255 Ischaemia Diseases 0.000 description 1
- 239000004201 L-cysteine Substances 0.000 description 1
- 235000013878 L-cysteine Nutrition 0.000 description 1
- 102000003960 Ligases Human genes 0.000 description 1
- 108090000364 Ligases Proteins 0.000 description 1
- 206010025135 Lupus erythematosus Diseases 0.000 description 1
- 101700067074 MAPK Proteins 0.000 description 1
- 101710041325 MAPKAPK2 Proteins 0.000 description 1
- 102000003945 NF-kappa B Human genes 0.000 description 1
- 108010057466 NF-kappa B Proteins 0.000 description 1
- 229960002715 Nicotine Drugs 0.000 description 1
- 101700086523 PTK2 Proteins 0.000 description 1
- 102000004005 Prostaglandin-endoperoxide synthases Human genes 0.000 description 1
- 108090000459 Prostaglandin-endoperoxide synthases Proteins 0.000 description 1
- 241000700159 Rattus Species 0.000 description 1
- 241000490025 Schefflera digitata Species 0.000 description 1
- 101710040537 TNF Proteins 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000003110 anti-inflammatory Effects 0.000 description 1
- 230000003078 antioxidant Effects 0.000 description 1
- 230000006907 apoptotic process Effects 0.000 description 1
- 235000013361 beverage Nutrition 0.000 description 1
- 230000037348 biosynthesis Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000903 blocking Effects 0.000 description 1
- 201000006474 brain ischemia Diseases 0.000 description 1
- 125000002915 carbonyl group Chemical group [*:2]C([*:1])=O 0.000 description 1
- 230000021164 cell adhesion Effects 0.000 description 1
- 230000022131 cell cycle Effects 0.000 description 1
- 230000022534 cell killing Effects 0.000 description 1
- 230000012292 cell migration Effects 0.000 description 1
- 150000001789 chalcones Chemical class 0.000 description 1
- 229930016212 chalcones Natural products 0.000 description 1
- 235000005513 chalcones Nutrition 0.000 description 1
- 230000005591 charge neutralization Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 235000019804 chlorophyll Nutrition 0.000 description 1
- ATNHDLDRLWWWCB-AENOIHSZSA-M chlorophyll a Chemical compound C1([C@@H](C(=O)OC)C(=O)C2=C3C)=C2N2C3=CC(C(CC)=C3C)=[N+]4C3=CC3=C(C=C)C(C)=C5N3[Mg-2]42[N+]2=C1[C@@H](CCC(=O)OC\C=C(/C)CCC[C@H](C)CCC[C@H](C)CCCC(C)C)[C@H](C)C2=C5 ATNHDLDRLWWWCB-AENOIHSZSA-M 0.000 description 1
- 229930002875 chlorophylls Natural products 0.000 description 1
- 238000004587 chromatography analysis Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910001956 copper hydroxide Inorganic materials 0.000 description 1
- 230000009089 cytolysis Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 235000015872 dietary supplement Nutrition 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 125000004030 farnesyl group Chemical group [H]C([*])([H])C([H])=C(C([H])([H])[H])C([H])([H])C([H])([H])C([H])=C(C([H])([H])[H])C([H])([H])C([H])([H])C([H])=C(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- ZONYXWQDUYMKFB-UHFFFAOYSA-N flavanone Chemical compound O1C2=CC=CC=C2C(=O)CC1C1=CC=CC=C1 ZONYXWQDUYMKFB-UHFFFAOYSA-N 0.000 description 1
- 229930003949 flavanones Natural products 0.000 description 1
- 235000011981 flavanones Nutrition 0.000 description 1
- 235000021285 flavonoid Nutrition 0.000 description 1
- 150000002215 flavonoids Chemical class 0.000 description 1
- 229930003935 flavonoids Natural products 0.000 description 1
- 125000002686 geranylgeranyl group Chemical group [H]C([*])([H])/C([H])=C(C([H])([H])[H])/C([H])([H])C([H])([H])/C([H])=C(C([H])([H])[H])/C([H])([H])C([H])([H])/C([H])=C(C([H])([H])[H])/C([H])([H])C([H])([H])C([H])=C(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- 238000000338 in vitro Methods 0.000 description 1
- 230000002757 inflammatory Effects 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000000543 intermediate Substances 0.000 description 1
- 230000000302 ischemic Effects 0.000 description 1
- 229960004592 isopropanol Drugs 0.000 description 1
- 235000015250 liver sausages Nutrition 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 125000000956 methoxy group Chemical group [H]C([H])([H])O* 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006011 modification reaction Methods 0.000 description 1
- 230000000051 modifying Effects 0.000 description 1
- 230000017074 necrotic cell death Effects 0.000 description 1
- 210000002569 neurons Anatomy 0.000 description 1
- 230000000324 neuroprotective Effects 0.000 description 1
- 230000002887 neurotoxic Effects 0.000 description 1
- 230000001264 neutralization Effects 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 230000003472 neutralizing Effects 0.000 description 1
- 229930015196 nicotine Natural products 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 230000001590 oxidative Effects 0.000 description 1
- MYMOFIZGZYHOMD-UHFFFAOYSA-N oxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000037361 pathway Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- 230000004983 pleiotropic Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000035755 proliferation Effects 0.000 description 1
- 150000003180 prostaglandins Chemical class 0.000 description 1
- 101710024887 rl Proteins 0.000 description 1
- 230000019491 signal transduction Effects 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 241000894007 species Species 0.000 description 1
- 101700045897 spk-1 Proteins 0.000 description 1
- 230000001225 therapeutic Effects 0.000 description 1
- 125000003396 thiol group Chemical group [H]S* 0.000 description 1
- 102000003995 transcription factors Human genes 0.000 description 1
- 108090000464 transcription factors Proteins 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 150000003751 zinc Chemical class 0.000 description 1
- 229960001763 zinc sulfate Drugs 0.000 description 1
- 229910000368 zinc sulfate Inorganic materials 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P25/00—Drugs for disorders of the nervous system
- A61P25/28—Drugs for disorders of the nervous system for treating neurodegenerative disorders of the central nervous system, e.g. nootropic agents, cognition enhancers, drugs for treating Alzheimer's disease or other forms of dementia
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P29/00—Non-central analgesic, antipyretic or antiinflammatory agents, e.g. antirheumatic agents; Non-steroidal antiinflammatory drugs [NSAID]
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P35/00—Antineoplastic agents
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P39/00—General protective or antinoxious agents
- A61P39/06—Free radical scavengers or antioxidants
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C45/00—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds
- C07C45/78—Separation; Purification; Stabilisation; Use of additives
- C07C45/79—Separation; Purification; Stabilisation; Use of additives by solid-liquid treatment; by chemisorption
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C45/00—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds
- C07C45/78—Separation; Purification; Stabilisation; Use of additives
- C07C45/85—Separation; Purification; Stabilisation; Use of additives by treatment giving rise to a chemical modification
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C45/00—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds
- C07C45/78—Separation; Purification; Stabilisation; Use of additives
- C07C45/86—Use of additives, e.g. for stabilisation
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C49/00—Ketones; Ketenes; Dimeric ketenes; Ketonic chelates
- C07C49/20—Unsaturated compounds containing keto groups bound to acyclic carbon atoms
- C07C49/213—Unsaturated compounds containing keto groups bound to acyclic carbon atoms containing six-membered aromatic rings
- C07C49/215—Unsaturated compounds containing keto groups bound to acyclic carbon atoms containing six-membered aromatic rings polycyclic
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C49/00—Ketones; Ketenes; Dimeric ketenes; Ketonic chelates
- C07C49/76—Ketones containing a keto group bound to a six-membered aromatic ring
- C07C49/782—Ketones containing a keto group bound to a six-membered aromatic ring polycyclic
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C49/00—Ketones; Ketenes; Dimeric ketenes; Ketonic chelates
- C07C49/76—Ketones containing a keto group bound to a six-membered aromatic ring
- C07C49/84—Ketones containing a keto group bound to a six-membered aromatic ring containing ether groups, groups, groups, or groups
Abstract
The invention provides a process for the preparation of xanthohumol, wherein a xanthohumol-containing extract is mixed with water, a transition metal salt solution is added to the obtained mixture, and then the obtained xanthohumol precipitate is collected and dried to obtain xanthohumol of the purity higher than 90%. ty higher than 90%.
Description
Process for the preparation of xanthohumol
The invention provides a process for the preparation of
high purity xanthohumol from post-extraction spent hops, gran
ulated hop plant or hops. Due to the high purity of the ob
tained xanthohumol it could be successfully used in dietary
supplements, beverages and as a therapeutic product ingredi
ent .
Xanthohumol (Xn), or ( (E)[2,4-dihydroxymethoxy(3-
methylbutenyl)-phenyl](4-hydroxyphenyl)-propen-l-one)
is a naturally-occurring compound of the group of prenylated
chalcones, the main source of it being female inflorescence of
Humulus Lupus (hop). It is present only in traces in the beer.
The compound is composed of two benzene rings linked by the
a, (3 - unsaturated carbonyl moiety:
HO. OCH3
OH O
Xanthohumol (Xn).
The presence of a free hydroxy group in the molecule makes
it easily isomerizable to the proper flavanone - an intermedi-
ate at the flavonoid biosynthesis pathway. As opposed to other
ingredients of hops, xanthohumol is more lipophilic, the fea
ture being connected with the presence of the prenylated sub-
stituent in its structure. It should be noted that in living
biological systems, the prenylated (farnesyl or geranylgera-
nyl) moieties facilitate attachment of numerous intracellurar
molecules to a cell membrane, determining their proper activi
ties. Likewise, it is suggested that in the case of xanthohu
mol, such moieties can significantly modulate biological ac
tivity of the compound, and what is more, influence its physi
cal-chemical properties and sub-cellular distribution.
In vitro and in vivo studies suggest also that xanthohumol
reduces inflammatory and oxidative processes by means of vari
ous mechanisms. The leading ones are: elimination of oxygen
free radicals and their reactive forms (RTF), cyclooxygenase
(COX I and COX II) activity inhibition, reduction in prosta
glandin, NO, TNFa, NFKB production and neutralization of mem
brane phospholipide peroxidation.
Antioxidative and antiinflammatory activity of xanthohumol
is connected with the presence of the hydroxy groups and the
prenylated substituent in its molecule. Of importance is also
the a, p unsaturated carbonyl moiety. The moiety partici
pates in the Michel reaction with biologically important nu-
cleophiles eg. : L-cysteine in proteins and other sulfhydryl
group-containing molecules. In that way, covalent adducts
which cause the loss of biological activity of various mole
cules bound by xanthohumol are obtained.
The broad spectrum of xanthohumol activity stems probably
from the compound's ability to bind important biological mole
cules. One of the best known examples is the influence of xan
thohumol on polymerase a synthetase, topoisomerase I, alkaline
phosphatase, aromatase, diacylglycerol acyltransferase, MAPK
signalling pathway proteins, FAK kinase, Akt and STAT or NF-KB
transcription factors. Xn-induced reduction of activities of
said proteins induces pleiotropic cell effects as a conse
quence of proliferation, cell cycle, adhesion and migration
disturbances in tumorous cells.
Noteworthy is also information concerning its neuroprotec
tive properties. In the rat model of MCAO-induced focal ische
mia, which reflects focal brain ischemia in vivo, xanthohumol
significantly reduces the brain ischemic necrosis area. Xan
thohumol is thus suggested to reduce also a neurotoxic effect
induced by the p-amyloid peptide (AfJ) . A|3 is known to mediate
the free-radical mechanism and is one of the main causes of
Alzheimer's disease, by increasing production of free radicals
and peroxidation of lipids in nerve cells, which consequently
lead to their apoptosis.
Further, apart from its effect on receptors, the mechanism
of xanthohumol's activity could be connected to its selective
activity towards lipid membranes. Studies on mechanisms of in
teraction of xanthohumol with model lipid membranes indicate
major modification of dynamic and structural properties of a
membrane. Even very small concentrations of xanthohumol
strongly interact with hydrophilic fragments of lipid membrane
to influence bilayer thickness changes. It is also known that
neonicotinoids, due to their high hydrophobicity, penetrate
lipid membranes very easily. Interaction of xanthohumol with
lipid membrane can significantly reduce its penetration by ne
onicotinoids, which could explain its strong activity, apart
from blocking nicotine receptors.
Concerning its chemical structure, xanthohumol is a poly
phenol, however, as opposed to polyphenols, it is scarcely
soluble in hot water, but dissolves readily in alcohols or wa
ter/alcohol mixtures.
A good source of xanthohumol is the post-extraction spent
hops, which comprises wastes from the production of hop ex
tract used by brewing industry for the manufacture of beer.
The post-extraction spent hops are estimated to contain up to
1% of xanthohumol, depending on the species of a hop plant.
Numerous technologies for the preparation of xanthohumol
are known in the art. The application DE 199 39 350 A1 de
scribes a process for the preparation of a xanthohumol-
enriched hop extract, wherein mixtures of water and ethanol
were used for extraction. The obtained extract contained 5 to
% of xanthohumol.
The patent EP 1 424 385 B1 discloses a method of extract
ing xanthohumol from the raw xanthohumol-containing material
by use of compressed CO2 as a solvent under a pressure above
500 bar and at temperatures above 60oC.
The application CN 101440029 discloses a method of ex
tracting xanthohumol from the hop plant and xanthohumol-
containing products, wherein the extraction with an organic
solvent assisted by ultrasounds is conducted, followed by mix
ing with diatomite, filtering, washing out with water/methanol
mixture, concentrating, precipitating and drying to obtain
xanthohumol of the 86% purity.
The patent EP 2 187 899 B1 discloses a process for the
preparation of a composition of the high xanthohumol content
from a hop plant, wherein a salt is added to a xanthohumol-
containing solution to the concentration in the range of from
0.05 to 5.0M, followed by increasing pH to from 10.5 to 12.0,
filtering the obtained precipitate, acidifying the filtrate to
pH 7-8 to obtain the xanthohumol precipitate of the 40-95% pu
rity.
The patent application US 11/790,365 discloses a process
for the preparation of the powder of the high (60-90%) xantho
humol content, comprising suspending a xanthohumol-enriched
extract in an alkaline solution, separating insoluble prod
ucts, neutralizing and precipitating the dissolved xanthohumol
with an acid and isolating the product.
Patent CN 101433592 discloses use of various adsorption
resins to prepare high purity xanthohumol.
In conclusion, analysis of the prior art discloses une
quivocally that there is a need for developing a simple and
inexpensive process for the preparation of high purity xantho
humol .
The problem is solved by a newly developed process for the
preparation of xanthohumol from post-extraction spent hops,
granulated hop plant or hops.
Thus, the invention relates to a process for the prepara
tion of xanthohumol, wherein:
a) a xanthohumol-containing extract is mixed with wa
ter;
b) a transition metal salt solution is added to the ob
tained mixture;
c) the obtained xanthohumol precipitate is collected
and dried to obtain xanthohumol of the purity higher
than 90%.
Preferably, in step b) the concentration of the salt in
the mixture is adjusted within the range of from 0.001M to
10M, more preferably in step b) the concentration of the salt
in the mixture is adjusted within the range of from 0.001M do
0.05M or above 5M.
Preferably, additionally after the salt is added in step
bl) the solution is alkalized to the pH level above 7;
b2) the first precipitate is filtered off, and the fil
trate is acidified to the pH level below 7;
b3) the acidified filtrate is concentrated to obtain
the xanthohumol precipitate.
Preferably, in step bl) the solution is alkalized to the
pH level in the range of 7.5 do 10.5 or above 12.
Preferably, the xanthohumol-containing extract is obtained
by extraction of the post-extraction spent hops, hops, granu-
lated hop plant or a mixture thereof with an organic water-
miscible solvent, the solvent being used in an amount of from
0.1 to 10 liters per 1 kg of the raw material.
Preferably, as an organic water-miscible solvent, ketones
and alcohols or a mixture thereof is used, more preferably, as
an organic water-miscible solvent acetone, methanol, ethanol,
propanol or a mixture thereof is used.
Preferably, the extraction is conducted at a temperature
in the range of from 5 to 650C.
Preferably, the xanthohumol-containing extract is mixed
with water at a ratio in the range of from 0.1 to 5 liters of
water per 1 liter of the extract, more preferably the xantho
humol-containing extract is mixed with water at a ratio in the
range of from 1 to 3 liters of water per 1 liter of the ex
tract.
Preferably, in step b) a concentration of a transition
metal salt is provided within the range of from 0.01M to
0.05M.
Preferably, as a transition metal salt a copper(II) salt
or a zinc(II) salt is used.
Preferably, as a transition metal salt a chloride salt, a
nitrate salt, or a sulfate salt is used.
Preferably, as a transition metal salt copper (II) chlo
ride, copper (II) sulfate or zinc (II) chloride or zinc(II) sul
fate is used.
The process according to the invention allows to obtain
xanthohumol of the purity of at least 90% (usually above 95%)
in a good yield. The process according to the invention do not
require use of complex chromatography systems or supported
resins.
Purity of the obtained xanthohumol was determined by the
HPLC technique on the SUPELCOSIL LC-PAH column of 15 cm x 4,6
mm, 5 jam grain size, column temperature of 200C, Phase A -
95% acetonitrile 0,3% HCOOH; Phase B 2% acetonitrile 0,3%
HCOOH, 2 ml/min flow rate, 20 jal injection, detection at the
wavelength of 370 and 290 nm.
The invention was illustrated by the following working ex
amples .
Example 1
250 g of post-extraction spent hops were weighed out and
poured over with acetone (0.75 L) . After mechanical stirring
for 1 h the extract formed was filtered through a filter pa
per. The obtained filtrate (0.65 L) was flushed with water
(1.3 L) . Then the solution was added with an aqueous solution
of CuCla (the concentration of 10 g/1) at the volume of 300 ml
per 1 liter of the filtrate (the final concentration of
0,022M). After adding copper chloride, the pH of the solution
was stabilized at ~4,5. Practically immediately after copper
chloride pouring, precipitation in the extract occurred of ag
glomerates of a green substance of residual humulons and chlo
rophyll separating from a yellow solution where xanthohumol
was found. After an hour, NaOH was added to precipitate an ex
cess of copper by raising the pH to about 10. After 1 h, pre
cipitation was observed of a muddy mass and copper hydroxide
precipitate at the bottom of the vessel. The precipitates were
filtered off on a filter paper. The obtained filtrate was
acidified with HC1 to pH 6 and concentrated on a rotary evapo
rator to yield a crystalline xanthohumol precipitate which was
filtered off and dried in an oven (temperature of 50-60oC) to
give 206 mg of xanthohumol of 97.8% HPLC purity. The yield of
the xanthohumol extraction process was 82% based on the total
content of xanthohumol in the spent hops.
Example 2
Xanthohumol was obtained as in Example 1, except that af
ter adding copper chloride, the precipitated green sludge was
filtered off and the filtrate was concentrated on a rotary
evaporator to yield the crystalline xanthohumol precipitate of
the 90.8% HPLC purity.
Example 3
Xanthohumol was obtained as in Example 1, except that cop
per chloride was substituted by a zinc sulfate (ZnSCM) solution
at the concentration of 10 g/1. After addition of the zinc
salt solution, the pH of the solution was stabilized at ~6,
and precipitation was observed. After about an hour NaOH was
added with the pH increase to about 10. After 1 h further pre
cipitate was observed at the bottom of the vessel. The precip
itate was filtered off on a filter paper. The obtained fil
trate was acidified with HC1 do pH 6 and concentrated on a ro
tary evaporator to yield the crystalline xanthohumol precipi
tate, which was filtered off and dried in an oven (the temper
ature of 50-60oC) to give xanthohumol of the 97.8% HPLC purity
with the 7 9% yield based on the total content of xanthohumol
in the spent hops.
Example 4
250 g of post-extraction spent hops were weighed out and
poured over with 0,75 liters of pure methanol. After mechani
cal stirring for 1 h the formed extract was filtered on a fil
ter paper. The obtained filtrate was poured over with water in
a volume ratio of 1:2 (one part of the filtrate to two parts
of water) . Then the solution was added with the aqueous solu
tion of CuCl2 (at the concentration of 10 g/1) in a volume of
300 ml per 1 liter of the filtrate (the final concentration of
the salt of 0,022M). After 1 h, precipitation in the extract
was observed of agglomerates of a green substance separating
from a yellow solution. NaOH was then added to raise the pH to
. After 1 h, a muddy green precipitate was observed at the
bottom of the vessel. The formed extract was filtered on a
filter paper. The obtained extract was acidified with HC1 to
pH 6. The remaining amounts of the solvent were removed on an
evaporator and a suspension of xanthohumol crystals was ob
tained. The suspension was filtered through a filter paper to
yield xanthohumol, which was dried in an oven at 550C to give
196 mg of xanthohumol of the 95.8% purity with the yield of
about 78% based on the total content of xanthohumol in the
spent hops.
Example 5
Xanthohumol was obtained as in Example 4, except that in
stead copper (II) chloride, copper (II) sulfate (CuSO-j) was used
at the concentration of 10 g/1 and xanthohumol was obtained
with the 94.8% purity.
Example 6
Xanthohumol was obtained as in Example 1, except that
higher concentrations of copper(II) chloride were used in
the range of 0.022M to 0.044M. Xanthohumol was obtained with
the purity ranging from 96.3 - 97.8%.
Example 7
Xanthohumol was obtained as in Example 1, except that the
ratio of the extract from the first step to the amount of ware
added of 1:1 and the CuCla concentration of 0.022M were used,
to yield xanthohumol of the 96.8% purity.
Example 8
Xanthohumol was obtained as in Example 1, except that 2-
propanol in place of acetone and the CuClz concentration of
0,022M were used to yield xanthohumol with the 93.8% purity.
Comparative Example 1
250 g of post-extraction spent hops were weighed out and
poured over with acetone (0.75 L) . After mechanical stirring
for 1 h the extract formed was filtered through a filter pa
per. The obtained filtrate was concentrated to yield xanthohu
mol of the 32.8% purity.
Comparative Example 2
250 g of post-extraction spent hops were weighed out and
poured over with acetone (0.75 L) . After mechanical stirring
for 1 h the extract formed was filtered through a filter pa
per. The obtained filtrate (0.65 1) was poured over with water
(1.3 1). Then the solution was added with the aqueous solution
of NaCl (at the concentration of 30 g/1) at the volume of 300
ml per 1 liter of the filtrate. Then, NaOH was added to raise
the pH to about 12. The precipitate formed was filtered off
through a filter paper. The obtained filtrate was acidified
with HC1 to pH 5 and concentrated on a rotary evaporator to
obtain a xanthohumol precipitate, which was filtered off and
dried in an oven (the temperature of 50-60oC) to yield xantho
humol of the 84.8% HPLC purity.
Comparative Example 3
Xanthohumol was obtained as in Comparative Example 2, ex
cept that NaCl was not used. Xanthohumol was obtained of the
58% HPLC purity - as a result of alkalization to pH 12 only.
Based on the above-described working examples, it could be
ascertained that the process according to the invention allows
to obtain xanthohumol of a high purity by an exceptionally
simple and inexpensive process. It is obvious for a person
skilled in the art that xanthohumol obtained by the inventive
process could be further purified according to known methods.
Claims (1)
1. Claims: 1. A process for the preparation of xanthohumol, character ized in that: a) a xanthohumol-containing extract is mixed with wa ter; b) a transition metal salt solution is added to the ob tained mixture; c) the obtained xanthohumol precipitate is collected and dried to obtain xanthohumol of the purity higher than 90%. characterized in that in step b) The process of claim 1, the concentration of the salt in the mixture is adjusted with in the range of from 0,001M to 10M. characterized in that in step b) 3. The process of claim 2, the concentration of the salt in the mixture is adjusted with in the range of from 0,001M to 0,05M. characterized in that 4. The process of any of claims 1-3, further after adding the salt in step b: bl) the solution is alkalized to the pH level above 7; b2) the first precipitate is filtered off, and the fil trate is acidified to the pH level below 7; b3) the acidified filtrate is concentrated to obtain the xanthohumol precipitate. The process of claim 4, characterized in that in step bl) the solution is alkalized to the pH level in the range of from 7, 5 to 10,5 . 6 • The process of any of claims 1-5, characterized in that the xanthohumol-containing extract is obtained by extraction of post-extraction spent hops, hops, granulated hop plant or a mixture thereof with an organic water-miscible solvent, said solvent being used in an amount of from 0,1 to 10 liters per 1 kg of the raw material. 7. The process of claim 6, characterized in that as an organic water-miscible solvent, ketones and alcohols or a mixture thereof are used. 0 The process of claim 7, characterized in that as an or ganic water-miscible solvent, acetone, methanol, ethanol, pro- panol or a mixture thereof is used. 9. The process of any of claims 1-8, characterized in that the extraction is conducted at a temperature in the range of from 5 to 650C. 10. The process of any of claims 1-9, characterized in that the xanthohumol-containing extract is mixed with water at a ratio in the range of from 0,1 to 5 liters of water per 1 li ter of the extract. 11. The process of claim 10, characterized in that the xantho humol-containing extract is mixed with water at a ratio in the range of from 1 to 3 liters of water per 1 liter of the ex tract . 12. The process of any of claims 1-11, characterized in that in step b) the concentration of a transition metal salt is provided within the range of from 0,011X1 to 0,05M. 13. The process of any of claims 1-12, characterized in that as a transition metal salt, a copper (II) salt or a zinc(II) salt is used. 14. The process of any of claims 1-12, characterized in that as a transition metal salt, a chloride salt, a nitrate salt, or a sulfate salt is used. 15. The process of any of claims 1-14, characterized in that as a transition metal salt, copper (II) chloride, copper(II) sulfate or zinc(II) chloride or sulfate zinc (II) is used.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PLP.405540 | 2013-10-04 | ||
PL405540A PL223580B1 (en) | 2013-10-04 | 2013-10-04 | Method for obtaining xanthohumol |
PCT/IB2014/001872 WO2015049561A1 (en) | 2013-10-04 | 2014-09-16 | Process for the preparation of xanthohumol |
Publications (2)
Publication Number | Publication Date |
---|---|
NZ719709A NZ719709A (en) | 2020-09-25 |
NZ719709B2 true NZ719709B2 (en) | 2021-01-06 |
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