CN117586214A - Linderane type sesquiterpene dimer and preparation method and application thereof - Google Patents

Linderane type sesquiterpene dimer and preparation method and application thereof Download PDF

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CN117586214A
CN117586214A CN202311583836.4A CN202311583836A CN117586214A CN 117586214 A CN117586214 A CN 117586214A CN 202311583836 A CN202311583836 A CN 202311583836A CN 117586214 A CN117586214 A CN 117586214A
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column chromatography
chloranthus
methanol
linderane
volume ratio
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倪伟
刘海洋
肖龙高
严欢
刘晖
方欣
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Kunming Institute of Botany of CAS
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Kunming Institute of Botany of CAS
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    • C07ORGANIC CHEMISTRY
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    • C07D307/00Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom
    • C07D307/94Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom spiro-condensed with carbocyclic rings or ring systems, e.g. griseofulvins
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Abstract

The invention belongs to the field of phytochemistry and medicines, relates to a linderane type sesquiterpene dimer, a preparation method and application thereof, and also relates to a medicine or a medicine composition containing the linderane type sesquiterpene dimer. The linderane sesquiterpene dimers chlorahololides H, J, L and chlorajaponilide E have remarkable NLRP3 inflammation corpuscle inhibition activity and can be used for treating chronic inflammatory diseases mediated by NLRP3 inflammation corpuscles.

Description

Linderane type sesquiterpene dimer and preparation method and application thereof
Technical Field
The invention belongs to the technical field of phytochemistry and medicines, and particularly relates to a linderane type sesquiterpene dimer chlorahololides H, J, L and chlorajaponilide E, a medicine or a medicine composition containing the linderane type sesquiterpene dimer, a preparation method of the linderane type sesquiterpene dimer and application of the linderane type sesquiterpene dimer in preparation of a medicine or a medicine composition for treating chronic inflammatory diseases.
Background
Inflammatory corpuscles are a class of protein complexes that play an important role in immunomodulation and in the inflammatory process. Inflammatory bodies act as intracellular signaling platforms capable of sensing and responding to intracellular and extracellular stimuli, including microbial infection, cellular injury, and environmental stress. Among them, the NLRP3 inflammatory body is a member of the NOD-like receptor (NLR) family, which plays an important role in sensing and modulating endogenous and exogenous signals within host cells. NLRP3 inflammatory corpuscles consist of a number of components, including NLRP3 protein, apoptosis-related spotted protein (ASC) and caspase-1 precursor (pro-cysteinyl aspartate specific proteinase-1, pro-caspase-1). NLRP3 inflammatory corpuscles are activated when stimulated by microorganisms, cell damage or other stresses. Activation of NLRP3 inflammatory body signals usually involves disorders of the intracellular and extracellular environment, such as intracellular K + Ion loss, ca 2+ Signal, accumulation of reactive oxygen species (reactive oxygen species, ROS), mitochondrial dysfunction, lysosomal disruption, etc. After activation of the NLRP3 inflammatory body, caspase precursor-1 (pro-caspase-1) is sheared to generate bioactive caspase-1 (caspase-1) which further promotes maturation and release of pro-inflammatory cytokines such as IL-1β (interleukin-1β) and IL-18 (interleukin-18), thereby triggering inflammatory effects.
Abnormal activation of NLRP3 inflammatory bodies is associated with the occurrence and progression of a variety of inflammation-related disorders, including rheumatoid arthritis, inflammatory bowel disease, type II diabetes, and the like. Thus, modulation of NLRP3 inflammatory bodies is a potential therapeutic strategy for the treatment of these chronic inflammatory diseases. Development of inhibitors of NLRP3 inflammatory body activation assembly provides a new treatment for related diseases. MCC950 has been widely studied as a small molecule inhibitor specific to NLRP3inflammasome, and its potential application in treating inflammatory diseases such as rheumatoid arthritis has attracted much attention and even entered phase II clinical trial. However, due to the problem of liver toxicity it eventually fails clinical trials.
Natural products are important sources for development of lead compounds of medicaments and are indispensable in medicament development. The method for searching the NLRP3 inflammation small molecule inhibitor with low toxicity and high activity from natural products has important significance. The Chloranthus (Chloranthus) is a Chinese herbal medicine with important clinical value, and has great potential in searching natural products with the treatment effect on chronic inflammatory diseases.
Disclosure of Invention
In view of the above, an object of the present invention is to provide linderane-type sesquiterpene dimers having NLRP3 inflammation-small-body inhibitory activity, namely, compounds chlorahololides H, J, L and chlorajaponilide E; medicaments or pharmaceutical compositions containing these compounds; the application of the compounds in preparing medicines or medicine compositions for treating chronic inflammatory diseases and the preparation method of the compounds provide new options for developing NLRP3 inflammation corpuscle inhibitors.
The object of the invention can be achieved by the following technical scheme.
In a first aspect, the present invention provides a linderane-type sesquiterpene dimer or a pharmaceutically acceptable derivative thereof represented by the following structural formulas I, II, III and IV,
in a second aspect, the present invention provides a medicament or pharmaceutical composition for the treatment of chronic inflammatory diseases comprising at least one linderane-type sesquiterpene dimer of formulae I, II, iii and IV or a pharmaceutically acceptable derivative thereof.
In a third aspect, the invention relates to the use of linderane-type sesquiterpene dimers chlorahololides H, J, L and chlorajaponilide E or pharmaceutically acceptable derivatives thereof for the preparation of a medicament or pharmaceutical composition for the treatment of chronic inflammatory diseases.
In embodiments of the invention, the chronic inflammatory disease is a NLRP3 inflammatory body-mediated chronic inflammatory disease including, but not limited to, arthritis such as rheumatoid arthritis, gouty arthritis; type II diabetes; non-alcoholic steatohepatitis; inflammatory bowel disease; neurological diseases and brain injuries including multiple sclerosis, alzheimer's disease, etc.
In a fourth aspect, the present invention provides a method of preparing linderane-type sesquiterpene dimers chlorahololides H, J, L and chlorajaponilide E, comprising the steps of:
1) Drying Chloranthus plant material, pulverizing, extracting with organic solvent, and desolventizing to obtain Chloranthus plant material extract; and
2) Subjecting the chloranthus plant material extract to column chromatography to obtain linderane type sesquiterpene dimers chlorahololides H, J, L and chlorajaponilide E.
In an embodiment of the process of the present invention, the organic solvent used in step 1) may be at least one of petroleum ether, chloroform, methylene chloride, ethyl acetate, acetone, ethanol, methanol, n-butanol and acetonitrile; preferably, the organic solvent is ethyl acetate, methanol, 95% ethanol or a mixture thereof.
Compared with the prior art, the invention has obvious beneficial effects. Specifically, the linderane sesquiterpene dimers chlorahololides H, J, L and chlorajaponilide E have remarkable NLRP3 inflammation corpuscle inhibition activity and can be used for treating chronic inflammatory diseases.
Drawings
FIG. 1 is a chemical formula of linderane-type sesquiterpene dimers chlorahololides H, J, L and chlorajaponilide E of the present invention.
FIG. 2 is a graph of chlorajaponilide E inhibiting apoptosis of mononuclear macrophages J774A.1.
FIG. 3 is a graph of the quantification of chlorajaponilide E inhibition of mononuclear macrophage J774A.1 pyro-apoptosis.
Detailed Description
The present invention will be described more fully hereinafter in order to facilitate an understanding of the present invention, and preferred embodiments of the present invention are set forth. This invention may, however, be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the scope of the invention. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
According to a first aspect, the present invention provides linderane-type sesquiterpene dimers chlorahololides H, J, L and chlorajaponilide E having NLRP3inflammasome inhibitory activity, having the structural formulae shown in formulas I, II, iii and IV below, respectively, or pharmaceutically acceptable derivatives, such as pharmaceutically acceptable salts, esters or prodrugs thereof:
according to a second aspect of the present invention there is provided a medicament or pharmaceutical composition for the treatment of chronic inflammatory diseases comprising as an active pharmaceutical ingredient at least one of the linderane sesquiterpene dimers chlorahololides H, J, L and chlorajaponilide E or pharmaceutically acceptable derivatives thereof. It will be appreciated by those skilled in the art that the medicament or pharmaceutical composition for treating chronic inflammatory diseases of the invention herein may further comprise a pharmaceutically acceptable carrier, adjuvant or excipient. Thus, in a more specific embodiment, a medicament or pharmaceutical composition for treating chronic inflammatory diseases comprises as active pharmaceutical ingredient at least one of linderane-type sesquiterpene dimers chlorahololides H, J, L and chlorajaponilide E or pharmaceutically acceptable derivatives thereof, and a pharmaceutically acceptable carrier, adjuvant or excipient.
In an embodiment of the medicament or pharmaceutical composition of the invention, the linderane-type sesquiterpene dimer as an active ingredient may be any one of chlorahololides H, J, L and chlorajaponilide E or any combination thereof.
It will be appreciated by those skilled in the art that pharmaceutically acceptable derivatives of the compounds chlorahololides H, J, L or chlorajaponilide E of the present invention, such as pharmaceutically acceptable salts, esters, solvates or hydrates or prodrugs of these compounds, may also be used as active ingredients in the medicaments or pharmaceutical compositions of the present invention. Thus, in yet another embodiment of the medicament or pharmaceutical composition of the invention, the active ingredient may be a pharmaceutically acceptable derivative of chlorahololides H, J, L or chlorajaponilide E, for example a pharmaceutically acceptable salt, ester, solvate or hydrate or prodrug of these compounds.
As is well known to those skilled in the art, the pharmaceutically acceptable salt may be, for example, a pharmaceutically acceptable base addition salt. Pharmaceutically acceptable base addition salts include salts derived from inorganic bases such as sodium, potassium, lithium, ammonium, calcium, magnesium, iron, zinc, copper, manganese, aluminum and the like. Salts derived from pharmaceutically acceptable non-toxic organic bases include salts of primary, secondary and tertiary amines, including naturally occurring substituted amines, cyclic amines and basic ion exchange resins, such as isopropylamine, trimethylamine, diethylamine, triethylamine, tripropylamine, and ethanolamine and triethanolamine.
The pharmaceutically acceptable esters may be esters of the linderane sesquiterpene dimers of the invention with pharmaceutically acceptable non-toxic organic acids, such as acetic acid, propionic acid, malic acid, citric acid, oxalic acid and palmitic acid.
Thus, in embodiments of the pharmaceutical compositions of the present invention, the active pharmaceutical ingredient may be any one, two, three or four of chlorahololides H, J, L or chlorajaponilide E, or an esterified, solvated, hydrated or other derivative thereof.
Pharmaceutically acceptable carriers, adjuvants or excipients are well known to those skilled in the art. Pharmaceutically acceptable carriers or excipients are one or more solid, semi-solid and liquid diluents, fillers and pharmaceutical product adjuvants including, but not limited to, fillers (diluents), lubricants (glidants or anti-adherents), dispersants, wetting agents, binders, solubilizing agents, antioxidants, bacteriostats, emulsifiers, disintegrants and the like. The binder comprises syrup, acacia, gelatin, sorbitol, tragacanth, cellulose and its derivatives (such as microcrystalline cellulose, sodium carboxymethylcellulose, ethylcellulose or hydroxypropyl methylcellulose), gelatin slurry, syrup, starch slurry or polyvinylpyrrolidone; the filler comprises lactose, sugar powder, dextrin, starch and its derivatives, cellulose and its derivatives, inorganic calcium salt (such as calcium sulfate, calcium phosphate, calcium hydrogen phosphate, precipitated calcium carbonate, etc.), sorbitol or glycine, etc.; the lubricant comprises aerosil, magnesium stearate, talcum powder, aluminum hydroxide, boric acid, hydrogenated vegetable oil, polyethylene glycol and the like; disintegrants include starch and its derivatives (e.g., sodium carboxymethyl starch, sodium starch glycolate, pregelatinized starch, modified starch, hydroxypropyl starch, corn starch, etc.), polyvinylpyrrolidone, microcrystalline cellulose, etc.; the wetting agent comprises sodium dodecyl sulfate, water or alcohol, etc.; the antioxidant comprises sodium sulfite, sodium bisulphite, sodium metabisulfite, dibutyl benzoic acid and the like; the bacteriostat comprises 0.5% phenol, 0.3% cresol, 0.5% chlorobutanol and the like; the emulsifier comprises polysorbate-80, sorbitan without acid, lecithin, soybean lecithin, etc.; the solubilizer comprises Tween-80, bile, glycerol, etc.
When the linderane sesquiterpene dimer of the present invention is used as a medicine, it may be administered directly or in the form of a pharmaceutical composition. In the pharmaceutical composition of the present invention, the pharmaceutical composition may contain from 0.1 to 99% by weight of chlorahololides H, J, L or chlorajaponilide E, preferably from 0.5 to 50% by weight of the total pharmaceutical composition.
An "effective amount" of a linderane-type sesquiterpene dimer chlorahololides H, J, L or chlorajaponilide E or a pharmaceutically acceptable derivative thereof, e.g., an ester, refers to an amount sufficient to achieve the desired biological effect. It will be appreciated that the effective dose will depend on the age, sex, health condition and weight of the recipient. Typically, the effective amount is determined by the person administering the treatment, e.g., a treating physician.
The pharmaceutical composition of the present invention may be administered in the form of a unit weight dose. All pharmaceutical compositions containing the linderane sesquiterpene dimers chlorahololides H, J, L or chlorajaponilide E or pharmaceutically acceptable derivatives thereof such as esterified substances as active ingredients are prepared into various dosage forms such as liquid preparations (injections, suspensions, emulsions, solutions, syrups and the like), solid preparations (tablets, capsules, granules, medicinal granules and the like), sprays, aerosols and the like by methods accepted in the pharmaceutical and food fields. The pharmaceutical composition of the present invention can be used for the treatment of inflammatory diseases by injection (intravenous injection, intravenous drip, intramuscular injection, intraperitoneal injection, subcutaneous injection), oral administration, sublingual administration, mucosal dialysis and other administration routes.
According to a third aspect, the present invention provides the use of a linderane-type sesquiterpene dimer chlorahololides H, J, L or chlorajaponilide E or a pharmaceutically acceptable derivative thereof in the manufacture of a medicament or pharmaceutical composition for the treatment of chronic inflammatory diseases.
In embodiments of the invention, the chronic inflammatory disease is a NLRP3 inflammatory body-mediated chronic inflammatory disease including, but not limited to, arthritis such as rheumatoid arthritis, gouty arthritis; type II diabetes; non-alcoholic steatohepatitis; inflammatory bowel disease; neurological diseases and brain injuries including multiple sclerosis, alzheimer's disease, etc.
According to a fourth aspect, the present invention provides a process for preparing linderane-type sesquiterpene dimers chlorahololides H, J, L and chlorajaponilide E, comprising the steps of:
1) Drying and pulverizing chloranthus plant material, leaching with organic solvent, and desolventizing to obtain chloranthus plant extract; and
2) Subjecting the chloranthus extract to column chromatography to obtain chlorahololides H, J, L and chlorajaponilide E.
In embodiments of the invention, the chloranthus material may be various parts of chloranthus, such as roots, stems, branches and leaves, or whole plants. In an embodiment of the invention, the chloranthus plant is a plant of the genus chloranthus, preferably chloranthus serrulatum (C.halostegius), chloranthus latifolia (C.henryi) or chloranthus serrulatum (C.halostegius var. Shimianensis).
In an embodiment of the present invention, in step 1), the organic solvent may be at least one of petroleum ether, chloroform, methylene chloride, ethyl acetate, acetone, ethanol, methanol, n-butanol, and acetonitrile; preferably, the organic solvent is ethyl acetate, methanol, 95% ethanol or a mixture thereof.
In an embodiment of the present invention, in step 1), the extraction method may be organic solvent cold leaching extraction, heating reflux extraction, organic solvent ultrasonic extraction, or the like.
In an embodiment of the invention, the chloranthus material is extracted at least 1 time, for example 2, 3, 4 times, preferably 3 times, with an organic solvent.
In embodiments of the invention, the volume ratio of organic solvent to dried chloranthus material may be from 1:1 to 5:1, for example 1:1, 2:1, 3:1, 4:1, 5:1, and ratios between any two of the foregoing, for example 1.5:1, 2.5:1, 3.5:1, 4.5:1, etc., preferably 3:1.
In a specific embodiment of the present invention, in step 2), the column chromatography includes normal phase silica gel column chromatography, reverse phase silica gel column chromatography (e.g., RP-18 column chromatography), resin column chromatography (e.g., D101 macroporous resin), gel column chromatography (e.g., sephadex LH-20), medium pressure chromatography separation gel (e.g., MCI gel), and semi-preparative high performance liquid chromatography (hereinafter referred to as semi-preparative HPLC).
In a specific embodiment of the present invention, in step 2), the eluent used in the column chromatography is at least one of petroleum ether, methylene chloride, chloroform, ethyl acetate, acetone, ethanol, methanol, n-butanol, acetonitrile, water and formic acid, such as a combination of any two of the above organic solvents, a combination of any three, a combination of any four, and the like. In a more specific embodiment of the invention, for normal phase silica gel column chromatography, petroleum ether and acetone may be used in a gradient elution from 1:0 to 0:1 by volume, such as 1:0, 50:1, 20:1, 10:1, 5:1, 1:1, 1:5, 0:1. In more specific embodiments of the invention, for normal phase silica gel column chromatography, dichloromethane and methanol may also be used in a gradient elution from 1:0 to 1:1 by volume, such as 1:0, 200:1, 100:1, 50:1, 20:1, 10:1, 1:1. In a more specific embodiment of the invention, for reverse phase silica gel column chromatography, such as reverse phase RP-18 column chromatography, methanol and water may be used in a gradient from 2:8 to 10:0 by volume, for example, the methanol to water volume ratio may be 2:8,5:5,8:2, 10:0. In a more specific embodiment of the invention, for resin column chromatography, such as D101 macroporous resin column chromatography, gradient elution of methanol and water may be employed in a volume ratio from 2:8 to 10:0, e.g., the volume ratio of methanol to water may be 2:8,5:5,8:2, 10:0. In a more specific embodiment of the invention, for gel column chromatography, such as Sephadex LH-20 gel column chromatography, methanol or chloroform-methanol (1:1, v: v) elution may be employed. In a more specific embodiment of the invention, for medium pressure chromatographic separation gels, such as MCI gels, ethanol and water may be used to elute in a gradient from 2:8 to 10:0 volume ratio, e.g., the volume ratio of ethanol to water may be 2:8,5:5,8:2, 10:0. In a more specific embodiment of the invention, for semi-preparative HPLC, an isocratic elution with acetonitrile and water, e.g. with 50% acetonitrile-water as mobile phase, may be used. In a more specific embodiment of the invention, for semi-preparative HPLC, it is also possible to use acetonitrile and water gradient elution, for example from 2:8 to 8:2 by volume.
Preferred embodiments of the present invention will be described in detail with reference to examples. It should be understood that the following examples are given for illustrative purposes only and are not intended to limit the scope of the present invention. Various modifications and substitutions may be made by those skilled in the art without departing from the spirit and scope of the invention, all such modifications and substitutions being within the scope of the invention as set forth in the appended claims.
The experimental methods used in the following examples are conventional methods unless otherwise specified. Materials, reagents and the like used in the examples described below are commercially available unless otherwise specified.
In the examples described below, optical rotation was measured using an Autopol VI polarimeter. Electronic Circular Dichroism (ECD) was measured using a Applied Photophysics circular dichroism spectrometer. Ultraviolet (UV) spectra were measured using a Shimadzu UV2700 UV spectrometer. 1 H NMR, 13 C NMR and 2DNMR spectra were recorded using Bruker AM-500 or AM-600 nuclear magnetic resonance apparatus. High resolution mass spectrometry (HR-ESI-MS) was determined using an Agilent 1290UPLC/6540Q-TOF mass spectrometer. Semi-preparative HPLC used Agilent 1260 liquid phase, chromatographic column Zorbax SB-C18 preparative column at flow rates of 3.0mL/min. Column chromatography involves the use of silica gel (200-300 mesh, qingdao ocean chemical Co., ltd., china), RP-18 (40-60 μm, merk), D101 macroporous resin (Shanghai Mikroorganism Biochemical Co., ltd., china), MCI gel (75-150 μm, mitsubishi chemical Co., ltd., japan) and Sephadex LH-20 (GE Healthcare, USA). Thin Layer Chromatography (TLC) was performed on silica gel GF254 plates (peninsula ocean chemical company, china) and spots were observed by 10% sulfuric acid-ethanol solution. Absorbance values were measured using a Biotek ELX800 multifunctional microplate reader. Fluorescence pictures were taken using an inverted microscope (Axio Observer3, zeiss; oberkochen, germany).
Example 1: preparation method one of Compounds chlorahololides H, J, L and chlorajaponilide E
Drying whole plant of the variety of chloranthus glaber asbestos (20 kg), pulverizing, adding 60L methanol (volume ratio of organic solvent to plant material is 3:1), reflux-extracting at 65deg.C for 3 times and 3 h/time, mixing extractive solutions, and distilling under reduced pressure to obtain methanol extract (1.8 kg). The methanol extract is passed through a D101 macroporous resin column, eluted by methanol-water gradient (2:8, 5:5,8:2, 10:0, v/v), the volume of each gradient is 4-6, the eluted part (162.4 g) of methanol and water with the volume ratio of 8:2 is taken to pass through a normal phase silica gel column for chromatography, and the eluted part is eluted by dichloromethane-methanol gradient (1:0, 200:1, 100:1, 50:1, 20:1, 10:1, 1:1, v/v), the volume of each gradient is 4-6, and 7 components are obtained after the color development of 10% sulfuric acid-ethanol solution according to thin layer chromatography, which are Fr.1-Fr.7 respectively. Fr.5 (22.6 g) was subjected to RP-18 reverse phase silica gel column chromatography eluting with methanol-water gradients (2:8, 3:7, 5:5, 7:3, 8:2, 10:0, v/v) with 4-6 column volumes per gradient to give 6 fractions Fr.5.1-Fr.5.6, respectively. Fr.5.3 (2.9 g) was chromatographed on normal phase silica gel column eluting with petroleum ether-acetone gradients (20:1, 10:1, 5:1, 1:1, 1:5, v/v), 4-6 column volumes per gradient, to give 5 fractions Fr.5.3.1-Fr.5.3.5, respectively. Fr.5.3.2 (675.2 mg) was prepared by semi-preparative HPLC using isocratic elution with 50% acetonitrile-water as the mobile phase to give 7.8mg chlorahololide H (yield: 0.000039%) and 4.0mg chlorajaponilide E (yield: 0.00002%). Fr.5.4 (3.6 g) was subjected to normal phase silica gel column chromatography, and isocratic elution with methylene chloride-methanol (100:1, v/v) gave 6 fractions Fr.5.4.1-Fr.5.4.6, respectively. Fr.5.4.3 (573.3 mg) was prepared by semi-preparative HPLC using isocratic elution with 60% acetonitrile-water as mobile phase to give 10.0mg chlorahololide J (yield: 0.00005%) and 14.0mg chlorahololide L (yield: 0.00007%).
Physical constants and spectral data for chlorihole H: white powder;(c0.14,MeOH);UV(MeOH)λ max (logε)223(3.18)nm;CD(MeOH)λ max (Δε)208(-14.1),251(+9.75),335(-1.33)nm; 1 HNMR(500MHz)δ1.59(1H,m,H-1),0.93(1H,td,J=7.6,4.5Hz,H-2α),0.34(1H,q,J=4.2Hz,H-2β),1.86(1H,m,H-3),3.88(1H,d,J=3.4Hz,H-6),2.69(1H,d,J=19.1Hz,H-9α),2.53(1H,m,H-9β),1.83(3H,s,H 3 -13),1.17(3H,s,H 3 -14),2.74(1H,dd,J=16.1,1.5Hz,H-15α),2.53(1H,m,H-15β),1.39(1H,td,J=8.4,3.9Hz,H-1′),0.71(1H,td,J=8.4,5.6Hz,H-2′α),1.78(1H,m,H-2′β),1.19(1H,m,H-3′),1.62(1H,m,H-5′),2.38(2H,m,H-6),1.92(1H,dd,J=5.9,1.8Hz,H-9′),4.35(2H,m,H-13′),0.62(3H,s,H 3 -14′),3.53(1H,dd,J=11.4,6.1Hz,H-15′a),3.57(1H,dd,J=11.4,5.0Hz,H-15′b),3.72(3H,s,MeO-12); 13 CNMR(CDCl 3 ,125MHz)δ28.4(C-1,d),16.2(C-2,t),24.9(C-3,d),138.8(C-4,s),134.1(C-5,s),41.2(C-6,d),137.3(C-7,s),204.9(C-8,s),52.2(C-9,t),45.2(C-10,s),142.9(C-11,s),170.8(C-12,s),19.4(C-13,q),22.8(C-14,q),25.5(C-15,t),24.1(C-1′,d),16.7(C-2′,t),21.3(C-3′,d),47.2(C-4′,d),57.8(C-5′,d),24.9(C-6′,t),169.3(C-7′,s),93.3(C-8′,s),54.4(C-9′,d),44.0(C-10′,s),126.1(C-11′,s),172.8(C-12′,s),55.1(C-13′,t),24.4(C-14′,q),63.2(C-15′,t),52.8(MeO-12,q).HRESIMS m/z 543.2360[M+Na] + (calcd forC 31 H 36 NaO 7 + ,543.2359)。
physical constants and spectral data for chlorsholide J: yellow gum;(c 0.14,MeOH);UV(MeOH)λ max (logε)219(3.42)nm;CD(MeOH)λ max (Δε)209(-21.9),253(+18.6),333(-3.02)nm; 1 HNMR(CDCl 3 ,600MHz)δ1.60(1H,o,H-1),0.95(1H,td,J=7.7,4.7Hz,H-2α),0.36(1H,q,J=4.1Hz,H-2β),1.84(1H,o,H-3),3.88(1H,d,J=3.7Hz,H-6),2.36(1H,d,J=18.5Hz,H-9α),2.56(1H,d,J=18.5Hz,H-9β),1.81(3H,s,H 3 -13),1.15(3H,s,H 3 -14),2.75(1H,d,J=16.6Hz,H-15α),2.55(1H,o,H-15β),1.60(1H,o,H-1′),0.71(1H,td,J=8.7,5.8Hz,H-2′α),1.31(1H,qJ=4.0Hz,H-2′β),1.39(1H,td,J=8.8,3.5Hz,H-3′),1.70(1H,dd,J=13.6,6.2Hz,H-5′),2.46(1H,dd,J=18.5,6.1Hz,H-6′α),2.73(1H,dd,J=18.5,13.6Hz,H-6′β),1.84(1H,m,H-9′),4.65(1H,d,J=12.4Hz,H-13′a),4.98(1H,d,J=12.5Hz,H-13′b),0.82(3H,s,H 3 -14′),3.69(1H,d,J=11.6Hz,H-15′a),4.53(1H,d,J=11.7,Hz,H-15′b),6.89(1H,m,H-3″),4.35(1H,m,H-4″a),4.42(1H,dd,J=15.7,4.8Hz,H-4″b),1.87(3H,s,H 3 -5″),2.12(3H,s,H-2″′),3.65(3H,s,MeO-12); 13 C NMR(CDCl 3 ,150MHz)δ28.6(C-1,d),16.3(C-2,t),24.8(C-3,d),138.5(C-4,s),134.7(C-5,s),41.2(C-6,d),136.5(C-7,s),201.0(C-8,s),52.2(C-9,t),45.2(C-10,s),143.0(C-11,s),171.0(C-12,s),19.1(C-13,q),22.8(C-14,q),25.3(C-15,t),25.3(C-1′,d),11.7(C-2′,t),27.9(C-3′,d),77.7(C-4′,s),61.2(C-5′,d),23.1(C-6′,t),173.3(C-7′,s),93.2(C-8′,s),55.6(C-9′,d),45.0(C-10′,s),123.0(C-11′,s),171.9(C-12′,s),54.7(C-13′,t),26.5(C-14′,q),71.8(C-15′,t),168.1(C-1″,s),127.2(C-2″,d),142.5(C-3″,d),60.1(C-4″,t),12.8(C-5″,q),171.4(C-1″′,s),20.7(Me-2″′,q),53.0(MeO-12,q).HRESIMS m/z 699.2781[M+Na] + (calcd for C 38 H 44 NaO 11 + ,699.2781)。
physical constants and spectral data for chlorsholide L: yellow gum;(c 0.11,MeOH);UV(MeOH)λ max (logε)220(3.29)nm;CD(MeOH)λ max (Δε)209(-21.5),259(+34.2),330(-6.69)nm; 1 H NMR(CDCl 3 ,600MHz)δ1.56(1H,o,H-1),0.92(1H,m,H-2α),1.33(1H,m,H-2β),1.87(1H,o,H-3),2.25(1H,d,J=17.8Hz,H-9α),2.55(1H,d,J=17.8Hz,H-9β),1.70(3H,s,H 3 -13),1.23(3H,s,H 3 -14),3.00(1H,dd,J=14.1,7.1Hz,H-15α),1.52(1H,o,H-15β),1.52(1H,o,H-1′),0.58(1H,td,J=8.9,5.6Hz,H-2′α),1.18(1H,m,H-2′β),1.59(1H,m,H-3′),1.44(1H,dd,J=13.0,6.7Hz,H-5′),2.31(1H,dd,J=17.5,6.5Hz,H-6′α),2.83(1H,dd,J=17.5,13.1Hz,H-6′β),2.57(1H,d,J=17.2Hz,H-9′),4.38(1H,d,J=13.8Hz,H-13′a),4.44(1H,d,J=13.6Hz,H-13′b),0.97(3H,s,H 3 -14′),3.89(1H,d,J=11.6Hz,H-15′a),4.25(1H,d,J=11.5,Hz,H-15′b),6.90(1H,m,H-3″),1.83(3H,d,J=7.2Hz,H-4″),1.86(3H,s,H 3 -5″),3.70(3H,s,MeO-12); 13 C NMR(CDCl 3 ,150MHz)δ28.7(C-1,d),8.4(C-2,t),29.4(C-3,d),90.4(C-4,s),160.7(C-5,s),126.6(C-6,s),136.5(C-7,s),201.4(C-8,s),48.6(C-9,t),44.5(C-10,s),135.2(C-11,s),169.6(C-12,s),20.0(C-13,q),22.1(C-14,q),37.1(C-15,t),27.2(C-1′,d),10.5(C-2′,t),29.4(C-3′,d),77.8(C-4′,s),54.6(C-5′,d),21.7(C-6′,t),166.4(C-7′,s),87.6(C-8′,s),51.8(C-9′,d),45.2(C-10′,s),127.8(C-11′,s),173.0(C-12′,s),55.4(C-13′,t),24.3(C-14′,q),70.8(C-15′,t),168.4(C-1″,s),128.4(C-2″,d),138.6(C-3″,d),14.7(C-4″,q),12.3(C-5″,q),52.7(MeO-12,q).HRESIMS m/z 673.2626[M+Na] + (calcd for C 36 H 42 NaO 11 + ,673.2625)。
physical constants and spectral data of Chlorajaponilide E: white powder; 1 H NMR(500MHz,Chloroform-d)δ2.00(1H,m,H-1),1.23(1H,m,H-2α),0.95(1H,m,H-2β),1.85(1H,m,H-3),3.75(1H,s,H-9),1.78(3H,s,H 3 -13),1.02(3H,s,H 3 -14),3.07(1H,dd,J=14.3,7.1Hz,H-15α),1.60(1H,m,H-15β),1.58(1H,m,H-1′),1.18(1H,m,H-2′α),0.60(1H,td,J=9.0,5.5Hz,,H-2′β),1.60(1H,m,H-3′),1.60(1H,m,H-5′),2.88(1H,dd,J=17.5,13.1Hz,H-6′α),2.25(1H,dd,J=17.5,6.7Hz,H-6′β),2.59(1H,dd,J=10.0,7.1Hz,H-9′),4.43(1H,d,J=13.7Hz,H-13′a),4.36(1H,d,J=13.9Hz,H-13′b),0.98(3H,s,H 3 -14′),4.15(1H,d,J=11.4Hz,H-15′a),3.93(1H,d,J=11.5Hz,H-15′b),6.84(1H,m,H-3″),1.84(3H,s,H-4″),1.85(3H,s,H 3 -5″),3.78(3H,s,MeO-12); 13 C NMR(125MHz,Chloroform-d)δ26.1(C-1,d),8.4(C-2,t),27.8(C-3,d),90.6(C-4,s),158.7(C-5,s),127.1(C-6,s),143.0(C-7,s),198.9(C-8,s),77.9(C-9,d),50.3(C-10,d),129.2(C-11,s),170.3(C-12,s),21.3(C-13,q),15.4(C-14.q),36.8(C-15,t),27.4(C-1′,d),10.5(C-2′,t),29.3(C-3′,d),77.7(C-4′,s),54.8(C-5′,d),21.9(C-6′,t),166.5(C-7′,s),87.6(C-8′,s),52.5(C-9′,d),45.2(C-10′,s),128.5(C-11′,s),173.1(C-12′,s),55.1(C-13′,t),24.4(C-14′,q),70.6(C-15′,t),168.3(C-1″,s),128.2(C-2″,s),139.0(C-3″,d),14.7(C-4″,q),12.3(C-5″,q),52.9(MeO-12,q)。
example 2: preparation method two of compounds chlorahololides H, J, L and chlorajaponilide E
Pulverizing dried root (20 kg) of the whole plant of chloranthus glaber, adding 100L ethyl acetate (volume ratio of organic solvent to plant material is 5:1), cold soaking and extracting for 4 times (3 days/time), mixing extractive solutions, and vacuum distilling to obtain pasty extract (1.1 kg). Subjecting the extract to normal phase silica gel column chromatography, and eluting with petroleum ether-acetone gradient (1:0, 50:1, 10:1, 1:1, 1:5, 0:1, v/v), wherein each gradient has 4-6 column volumes to obtain 6 components, which are Fr.1-Fr.6 respectively. Fr.4 (88.2 g) was subjected to MCI gel column chromatography eluting with ethanol-water gradients (2:8, 3:7, 4:6, 5:5, 6:4, 7:3, 8:2, 10:0, v/v), 4-6 column volumes per gradient, yielding 8 fractions Fr.4.1-Fr.4.8, respectively. Fr.4.3 (7.8 g) was chromatographed on normal phase silica gel using chloroform-methanol gradients (200:1, 50:1, 20:1, 10:1, 1:1, v/v), 4-6 column volumes per gradient, yielding 5 fractions Fr.4.3.1-Fr.4.3.5, respectively. Fr.4.3.3 (267.9 mg) was prepared by semi-preparative HPLC using isocratic elution with 55% acetonitrile-water as the mobile phase to give 12.0mg chlorahololide H (yield: 0.00006%) and 6.0mg chlorajaponilide E (yield: 0.00003%). Fr.4.3.4 (437.2 mg) was prepared by semi-preparative HPLC using gradient elution (0-30 min, acetonitrile concentration from 30% -80%, v/v) to give 16.0mg chlorahololide J (yield: 0.00008%) and 4.0mg chlorahololide L (yield: 0.00002%).
Example 3: preparation method three of compounds chlorahololides H, J, L and chlorajaponilide E
The whole plant (15 kg) of chloranthus japonicus is dried and crushed, 45L of 95% ethanol (the volume ratio of organic solvent to plant material is 3:1) is used for heating and reflux extraction for 2 times and 3 hours/time at 70 ℃, and the ethanol extract (1.4 kg) is obtained by vacuum distillation after the extraction liquid is combined. The ethanol extract was suspended in 6L of purified water, and then extracted 3 times with 6L of ethyl acetate, and the extracts were combined and the solvent was recovered to give ethyl acetate extract (763.5 g). Ethyl acetate extract was purified by medium MCI gel column chromatography eluting with methanol-water gradients (2:8, 3:7, 5:5, 7:3, 8:2, 10:0, v/v), 4-6 column volumes per gradient, yielding 6 fractions fr.1-fr.6, respectively. Fr.3 (146.7 g) was subjected to gradient elution (200:1, 100:1, 50:1, 10:1, 1:1, v/v) using normal phase silica gel column chromatography with dichloromethane-methanol as eluent, with each gradient ranging from 4 to 6 column volumes, yielding 5 fractions Fr.3.1-Fr.3.5, respectively. Fr.3.2 (24.3 g) was prepared by semi-preparative HPLC using Sephadex LH-20 gel column chromatography with methanol as eluent and acetonitrile-water as mobile phase using isocratic elution (acetonitrile concentration 55%) to give 4.5mg chlorahololide H (yield: 0.00003%) and 15.0mg chlorajaponilide E (yield: 0.0001%). Fr.3.3 (16.4 g) was prepared by semi-preparative HPLC using Sephadex LH-20 gel column chromatography with chloroform-methanol (1:1, v:v) as eluent and then with acetonitrile-water as mobile phase by isocratic elution (acetonitrile concentration 60%) to give 18mg chlorahololide J (yield: 0.00012%) and 13.5mg chlorahololide L (yield: 0.00009%).
Example 4: preparation method four of Compounds chlorahololides H, J, L and chlorajaponilide E
The whole chloranthus latifolia (20 kg) is dried and crushed, 20L of methanol (the volume ratio of the organic solvent to the plant material is 1:1) is used for ultrasonic extraction for 3 times at room temperature, and the extract is combined and distilled under reduced pressure to obtain a pasty extract (1.3 kg). Subjecting the extract to normal phase silica gel column chromatography, eluting with dichloromethane-methanol gradient (1:0, 200:1, 100:1, 50:1, 20:1, 10:1, 1:1, v/v), and collecting 7 components (Fr.1-Fr.7) with each gradient of 4-6 column volumes. Fr.5 (127.4 g) was subjected to RP-18 reverse phase silica gel column chromatography eluting with methanol-water gradients (2:8, 5:5,8:2, 10:0, v/v) with 4-6 column volumes per gradient to give 4 fractions Fr.5.1-Fr.5.4, respectively. Fr.5.3 (16.4 g) was eluted with petroleum ether-acetone gradients (10:1, 1:1, 1:5, 0:1, v/v) using normal phase silica gel column chromatography, with 4-6 column volumes per gradient, yielding 4 fractions Fr.5.3.1-Fr.5.3.4, respectively. Fr.5.3.2 (478.6 mg) was prepared by semi-preparative HPLC using isocratic elution with 50% acetonitrile-water as the mobile phase to give 10.0mg chlorahololide H (yield: 0.00005%) and 16.0mg chlorajaponilide E (yield: 0.00008%). Fr.5.4 (23.3 g) was eluted with a normal phase silica gel column with petroleum ether-acetone gradient (20:1, 10:1, 1:1, 1:5, 0:1, v/v), each gradient 4-6 column volumes, yielding 5 fractions Fr.5.4.1-Fr.5.4.5, respectively. Fr.5.4.2 (898.4 mg) was prepared by semi-preparative HPLC using gradient elution (0-30 min, acetonitrile concentration from 30% -70%, v/v) to give 8.0mg chlorahololide J (yield: 0.00004%) and 12.0mg chlorahololide L (yield: 0.00006%).
Example 5: NLRP3 inflammatory corpuscle inhibitory Activity of chlorahololides H, J, L and chlorajaponilide E
Lactate Dehydrogenase (LDH) is a stable cytoplasmic enzyme that is present in all cells and is rapidly released into cell culture when the cell membrane is damaged. Activation of NLRP3 inflammatory bodies eventually leads to cell scorch and rupture of cell membranes, leading to release of LDH into the cell culture fluid, which can be monitored by measuring the LDH content in the cell culture fluid. Thus, in this example, a model of NLRP3 inflammatory body activation was constructed using mouse mononuclear macrophages j774a.1, which together induced NLRP3 inflammatory body activation by Lipopolysaccharide (LPS) and Nigericin (Nigericin). Specific methods can be found in Xing, jie Zhang, et al 2021,Leojaponin inhibits NLRP3inflammasome activation through restoration of autophagy via upregulating RAPTOR phosphorylation,Journal of Ethnopharmacology 278 (2021) 114322.
Specific experiments were as follows, mouse mononuclear macrophage J774A.1 (purchased from Kunming animal institute, national academy of sciences) was used at 2X 10 5 Density of cells per well was seeded in 24 well plates, each well containing 500. Mu.L of Dulbecco's Modified Eagle Medium (DMEM, gibco) supplemented with 8% heat-inactivated fetal bovine serum (FBS, gibco) and placed in a well containing 5% CO 2 The cells were cultured overnight in a CO2 incubator (Thermo Scientific) at a constant temperature of 37 ℃. After overnight incubation, the medium was removed. Subsequently, 500. Mu.L of 200ng/mL LPS (Shanghai Biyun Biotechnology Co., ltd.) in Opti-MEM medium (Thermo Scientific, eugene, OR, USA) was added to each well to stimulate the cells for 3.5 hours. Then, the medium was aspirated, 500. Mu.L of 10. Mu.M compounds chlorahololides H, J, L and chlorajaponilide E in Opti-MEM medium was added, 500. Mu.L of 0.1. Mu.M MC CC950 (Shanghai Ala Biochemical Co., ltd.) in Opti-MEM medium was added as a positive control, 500. Mu.L of 1. Mu.L/mL DMSO in Opti-MEM medium was added as a negative control, and cells were incubated in a CO2 incubator for 30min. Finally, the medium was aspirated, and 500. Mu.L of 10. Mu.M Nigericin (Albumin Biotechnology Co., shanghai) dissolved in Opti-MEM medium was added to each well to stimulate the cells for 1 hour. After activation of inflammatory bodies and treatment with compounds, the cell culture supernatant was taken down120 μl) was collected in 96-well plates, and 60 μl of LDH assay working solution (Shanghai Biyun biotechnology limited) was added, mixed well, and incubated at room temperature for 30min in the absence of light. The absorbance was measured at 490nm, and the LDH release inhibition rate was calculated as follows, i.e., LDH release inhibition rate (%) = (DMSO-treated group OD 490 nm Sample set OD 490 nm ) DMSO-treated group OD 490 nm X 100%. Compounds chlorahololides H, J, L and chlorajaponilide E semi-inhibitory concentration on NLRP3 inflammatory body activation (Halfmaximal inhibitory concentration, IC 50 ) The test method of (2) is as follows: each compound was set up with different concentration gradients (10. Mu.M, 5. Mu.M, 2.5. Mu.M, 1.25. Mu.M and 0.625. Mu.M), the compounds were tested for their inhibition of LDH release at different concentrations, and nonlinear regression analysis was performed using GraphPad prism7.0 software to calculate the IC of the compound 50 Values. Cell viability was examined using the MTT method, excluding toxic effects of compounds chlorahololides H, J, L and chlorajaponilide E on cells, as described in Xing, jie Zhang 2021 (supra). All experiments were repeated at least 3 times and experimental data were calculated analytically using GraphPad prism 7.0.
Experimental results as shown in tables 1 and 2, chlorahololides H, J, L and chlorajaponilide E had significant NLRP3 inflammatory body inhibitory activity at a concentration of 10 μm, and the IC of these compounds was further tested 50 Values were 8.73. Mu.M, 6.15. Mu.M, 3.03. Mu.M, and 2.99. Mu.M, respectively.
Tables 1.Chlorahololides H, J, L and chlorajaponilide E show inhibition of NLRP3 inflammatory corpuscles (%)
a MCC950 as positive control
Tables 2.Chlorahololides H, J, L and chlorajaponilide E IC for NLRP3 inflammatory corpuscle inhibition 50 Value of
a CC 50 The values represent the concentration of the compound that induces 50% cytotoxicity
Example 6: chlorajaponilide E significantly reduces the pyro-death of j774a.1 macrophages
This example discusses the effect of linderane-type sesquiterpene dimer chlorajaponilide E, which has significant inhibitory activity on NLRP3 inflammatory bodies, on j774a.1 macrophage coke death. Specific methods can be found in Xing, jie Zhang, et al, 2021,Leojaponin inhibits NLRP3inflammasome activation through restoration of autophagy via upregulating RAPTOR phosphorylation,Journal of Ethnopharmacology 278 (2021) 114322.
Specific experiments were as follows, mouse mononuclear macrophage J774A.1 (purchased from Kunming animal institute, national academy of sciences) was isolated at 4X 10 4 Density of cells per well was seeded in 96-well plates, each well containing 200. Mu.L of Dulbecco's Modified Eagle Medium (DMEM, gibco) supplemented with 8% heat-inactivated fetal bovine serum (FBS, gibco) and placed in a well containing 5% CO 2 The cells were cultured overnight in a CO2 incubator (Thermo Scientific) at a constant temperature of 37 ℃. After one night of incubation, three different experiments were set up. The LPS and nigericin treatment groups were operated as follows: the medium was removed, 200. Mu.L of 200ng/mL LPS in Opti-MEM medium was added to each well, the cells were stimulated for 3.5 hours, then the medium was aspirated, and 200. Mu.L of compound chlorajaponilide E (1. Mu.M, 3. Mu.M and 9. Mu.M) in Opti-MEM medium, and DMSO (negative control, 1. Mu.L/mL) were added to each well, and the cells were washed in CO 2 Incubate in incubator for 30min. Finally, the medium was removed and 200. Mu.L of 10. Mu.M Nigericin in Opti-MEM medium was added to each well and the cells were stimulated for 1 hour. Untreated groups operate as follows: the medium was removed and 200. Mu.L of Opti-MEM medium was added to each well. Treatment groups with chlorajaponilide E (9 μm) alone were operated as follows: the medium was removed and 200. Mu.L of Opti-MEM medium was added to each well. After 3.5 hours, the medium was aspirated and 200. Mu.L of 9. Mu.M compound chlorajaponilide E in Opti-MEM medium was added to each well.
After activation of NLRP3 inflammatory bodies, LPS and Nigericin treated group cells were removed from the supernatant, 100. Mu.L of 3. Mu.g/mL PBS-formulated Propidium iodide (Propidium iodate, PI, shanghai Biyun Biotechnology Co., ltd.) and 0.5. Mu.g/mL Hoechst 33342 (Shanghai Biyun Biotechnology Co., ltd.) were added as dyes to stain macrophages J774A.1, stained at room temperature for 15min, and photographed with a fluorescent inverted microscope (Axio Olerver 3, zeiss; oberkochen, germany). PI stained the scorched cells red and Hoechst 33342 stained the nuclei blue. The other two groups of experimental cells used the same procedure. All experiments were repeated at least 3 times. Experimental data were calculated analytically using GraphPad prism 7.0. Differences between groups were analyzed using One-way analysis of variance (One-way analysis). * P <0.05, < P <0.01, < P <0.001, there are significant differences when P <0.05 is statistically significant.
The results are shown in FIGS. 2 and 3. From figure 2 it can be seen that the LPS and nigericin treated groups significantly increased the proportion of PI staining compared to the untreated groups, indicating a significantly increased number of apoptotic cells. While cells from the treated group were indistinguishable from untreated groups with chlorajaponilide E (9. Mu.M) alone, indicating that compound chlorajaponilide E did not cause j774A.1 cells to undergo focal death. In addition, chlorajaponilide E reduced the proportion of j774a.1 apoptosis in the LPS and nigericin treated groups in a concentration-dependent manner compared to the negative control DMSO, indicating that the compound was effective in inhibiting apoptosis induced by NLRP3 inflammatory body activation. Fig. 3 is a graph of chlorajaponilide E quantification of inhibition of j774a.1 cell apoptosis, in the LPS and nigericin treated groups, of j774a.1 cell apoptosis was inhibited following administration of chlorajaponilide E (1 μm, 3 μm and 9 μm) compared to the negative control DMSO, P <0.001, indicating that chlorajaponilide E can significantly inhibit j774a.1 cell apoptosis induced by LPS and nigericin.

Claims (9)

1. The linderane type sesquiterpene dimer or a pharmaceutically acceptable derivative thereof is characterized in that the linderane type sesquiterpene dimer has any one of the following structural formulas I-IV:
2. a medicament or pharmaceutical composition for the treatment of chronic inflammatory diseases, characterized in that it comprises at least one of the linderane sesquiterpene dimers or pharmaceutically acceptable derivatives thereof according to claim 1.
3. Use of a linderane-type sesquiterpene dimer or a pharmaceutically acceptable derivative thereof according to claim 1 in the manufacture of a medicament for the treatment of chronic inflammatory diseases.
4. A process for preparing the linderane-type sesquiterpene dimer according to claim 1, characterized by comprising the steps of:
1) Drying and pulverizing Chloranthus (Chloranthus) plant material, extracting with organic solvent, and desolventizing to obtain Chloranthus plant material extract; and
2) Subjecting the chloranthus material extract to column chromatography to obtain chlorahololides H, J, L and chlorajaponilide E.
5. The method according to claim 4, wherein the chloranthus material is the root, stem, branch, whole plant or a mixture thereof of chloranthus, preferably the chloranthus is chloranthus gracilis (c.holosticus), chloranthus latifolia (c.henryi) or chloranthus gracilis asbestos variety (c.holosticus var. Shimianensis).
6. The process according to claim 4, characterized in that the volume ratio of the organic solvent to the chloranthus material is from 1:1 to 5:1, preferably 3:1.
7. The method according to claim 4, wherein in step 1), the organic solvent is at least one of petroleum ether, chloroform, methylene chloride, ethyl acetate, acetone, ethanol, methanol, n-butanol, and acetonitrile; preferably, the organic solvent is ethyl acetate, methanol, 95% ethanol or a mixture thereof.
8. The method according to claim 4, wherein in step 2), the column chromatography includes normal phase silica gel column chromatography, reverse phase silica gel column chromatography, resin column chromatography, gel column chromatography, medium pressure chromatography separation gel and semi-preparative HPLC.
9. The method according to claim 8, wherein in step 2), the eluent used for the column chromatography is at least one of petroleum ether, methylene chloride, chloroform, ethyl acetate, acetone, ethanol, methanol, n-butanol, acetonitrile, water and formic acid; preferably, the normal phase silica gel column chromatography adopts petroleum ether and acetone to perform gradient elution according to the volume ratio of 1:0 to 0:1, or adopts methylene dichloride and methanol to perform gradient elution according to the volume ratio of 1:0 to 1:1; the reversed-phase silica gel column chromatography adopts methanol and water to carry out gradient elution according to the volume ratio of 2:8 to 10:0; the resin column chromatography adopts methanol and water to carry out gradient elution according to the volume ratio of 2:8 to 10:0; the gel column chromatography adopts methanol or methanol and chloroform to elute according to the volume ratio of 1:1; the medium-pressure chromatographic separation gel adopts methanol or ethanol and water to carry out gradient elution according to the volume ratio of 2:8 to 10:0; the semi-preparative HPLC is eluted with acetonitrile and water isocratically, or the semi-preparative HPLC is eluted with acetonitrile and water in a volume ratio from 2:8 to 8:2 gradient.
CN202311583836.4A 2023-11-24 2023-11-24 Linderane type sesquiterpene dimer and preparation method and application thereof Pending CN117586214A (en)

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