JP6615455B2 - Method for producing liquiritigenin composition - Google Patents
Method for producing liquiritigenin composition Download PDFInfo
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- JP6615455B2 JP6615455B2 JP2014262279A JP2014262279A JP6615455B2 JP 6615455 B2 JP6615455 B2 JP 6615455B2 JP 2014262279 A JP2014262279 A JP 2014262279A JP 2014262279 A JP2014262279 A JP 2014262279A JP 6615455 B2 JP6615455 B2 JP 6615455B2
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- JBQATDIMBVLPRB-UHFFFAOYSA-N isoliquiritigenin Natural products OC1=CC(O)=CC=C1C1OC2=CC(O)=CC=C2C(=O)C1 JBQATDIMBVLPRB-UHFFFAOYSA-N 0.000 title claims description 56
- FURUXTVZLHCCNA-UHFFFAOYSA-N Liquiritigenin Natural products C1=CC(O)=CC=C1C1OC2=CC(O)=CC=C2C(=O)C1 FURUXTVZLHCCNA-UHFFFAOYSA-N 0.000 title claims description 39
- FURUXTVZLHCCNA-AWEZNQCLSA-N liquiritigenin Chemical compound C1=CC(O)=CC=C1[C@H]1OC2=CC(O)=CC=C2C(=O)C1 FURUXTVZLHCCNA-AWEZNQCLSA-N 0.000 title claims description 39
- GSZUGBAEBARHAW-UHFFFAOYSA-N sophoraflavone B Natural products OC1C(O)C(O)C(CO)OC1OC1=CC=C(C=2OC3=CC(O)=CC=C3C(=O)C=2)C=C1 GSZUGBAEBARHAW-UHFFFAOYSA-N 0.000 title claims description 38
- 238000004519 manufacturing process Methods 0.000 title claims description 10
- 239000000203 mixture Substances 0.000 title claims description 9
- DXDRHHKMWQZJHT-FPYGCLRLSA-N isoliquiritigenin Chemical compound C1=CC(O)=CC=C1\C=C\C(=O)C1=CC=C(O)C=C1O DXDRHHKMWQZJHT-FPYGCLRLSA-N 0.000 claims description 18
- 235000008718 isoliquiritigenin Nutrition 0.000 claims description 18
- 238000006243 chemical reaction Methods 0.000 claims description 14
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- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 24
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- 235000017382 Glycyrrhiza lepidota Nutrition 0.000 description 9
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- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 6
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 6
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- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical compound Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 description 3
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- CTSLXHKWHWQRSH-UHFFFAOYSA-N oxalyl chloride Chemical compound ClC(=O)C(Cl)=O CTSLXHKWHWQRSH-UHFFFAOYSA-N 0.000 description 2
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- DZLOUWYGNATKKZ-UHFFFAOYSA-N 4-ethoxycinnamic acid Natural products CCOC1=CC=C(C=CC(O)=O)C=C1 DZLOUWYGNATKKZ-UHFFFAOYSA-N 0.000 description 1
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- CSCPPACGZOOCGX-WFGJKAKNSA-N acetone d6 Chemical compound [2H]C([2H])([2H])C(=O)C([2H])([2H])[2H] CSCPPACGZOOCGX-WFGJKAKNSA-N 0.000 description 1
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- RQFQJYYMBWVMQG-IXDPLRRUSA-N chitotriose Chemical compound O[C@@H]1[C@@H](N)[C@H](O)O[C@H](CO)[C@H]1O[C@H]1[C@H](N)[C@@H](O)[C@H](O[C@H]2[C@@H]([C@@H](O)[C@H](O)[C@@H](CO)O2)N)[C@@H](CO)O1 RQFQJYYMBWVMQG-IXDPLRRUSA-N 0.000 description 1
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- USLKCMBGQFYUFI-UHFFFAOYSA-N dichloromethane;tribromoborane Chemical compound ClCCl.BrB(Br)Br USLKCMBGQFYUFI-UHFFFAOYSA-N 0.000 description 1
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- Pyrane Compounds (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
本発明は甘草素リキリチゲニンの前駆物質イソリキリチゲニンと有機酸を主成分とするリキリチゲニン薬理効果を有する組成物に関する。 The present invention relates to a composition having a pharmacological effect of liquiritigenin, which is mainly composed of a precursor of licorice liquiritigenin, isoliquiritigenin and an organic acid.
甘草素リキリチゲニンは広く薬効が認められる優れた漢方薬であって、一般に甘草から抽出される。しかし、その抽出方法は甘草根を熱抽出した後、加水分解後の糖類部(グルコースやアビオース)を除去し、得られるリキリチゲニンの逆相クロマトグラフによる精製を必要とする。そのため、甘草素の甘草からの抽出はコスト高で、貴重ではあり、1g1万元以上で販売されている。その上甘草の栽培が困難なことから甘草が減少傾向にあって、入手困難に伴い、ますます高騰しつつある。 Licorice liquiritigenin is an excellent herbal medicine with widely recognized medicinal effects, and is generally extracted from licorice. However, the extraction method requires extraction of the liquoritigenin by reverse phase chromatography after removing saccharide parts (glucose and abiose) after hydrolysis after extracting licorice root with heat. Therefore, the extraction of licorice from licorice is expensive and valuable, and it is sold for over 10,000 yuan. In addition, licorice is declining because it is difficult to cultivate licorice.
そこで、甘草素リキリチゲニンを人工的に合成しようとする試みがある。第1の方法は図2に示すように、p−ヒドロキシベンズアルデヒドを出発原料とする方法で、4−カルボキシケイヒ酸を合成し、これを経由して1,3−ジヒドロキシベンゼンを付加してイソリキリチゲニンを得る方法である(非特許文献1)が、収率が低いという欠点がある。そこで、第2の方法として、図3に示すように、p−ヒドロキシベンズアルデヒドを出発原料とし、p位の水酸基をMOM試薬で保護する一方、1,3−ジヒドロキシベンゼンの水酸基をMOM試薬で保護し、両者を付加する方法が提案される(非特許文献2)。しかしながら、実際に検証してみると、ほぼ全段階(収率や生成物がオイル状など)でカラムクロマトによる精製工程が必要となる。しかも、我々の追試実験ではスケールアップした場合のカップリング工程の収率が42%まで低下し、その上最終工程のイソリキリチゲニンからリキリチゲニンへの閉環反応で,原料と目的物が平衡状態にあって,収率が上がらないという結果を得た。また、閉環段階での原料と目的物の分離が,困難で、最終クロマト精製条件でリキリチゲニンはテーリングし,大幅に回収率が低下した。しかもMOM保護試薬の発がん性,さらに保護,脱保護で2段階の余分な工程が必要であり、第2法は実験室レベルでは有効であるものの、量産には適しないとの知見を得た。 There is an attempt to artificially synthesize licorice liquiritigenin. As shown in FIG. 2, the first method is a method in which p-hydroxybenzaldehyde is used as a starting material, and 4-carboxycinnamic acid is synthesized, and 1,3-dihydroxybenzene is added via this to isomerize. Although it is a method for obtaining lithigenin (Non-patent Document 1), there is a disadvantage that the yield is low. Therefore, as shown in FIG. 3, as a second method, p-hydroxybenzaldehyde is used as a starting material, and the hydroxyl group at the p-position is protected with a MOM reagent, while the hydroxyl group of 1,3-dihydroxybenzene is protected with a MOM reagent. A method of adding both is proposed (Non-Patent Document 2). However, when actually verified, purification steps by column chromatography are required in almost all stages (yield, product is oily, etc.). Moreover, in our follow-up experiment, the yield of the coupling process when scaled up decreased to 42%, and in addition, the ring-closing reaction from isoliquiritigenin to liquiritigenin in the final process brought the equilibrium between the raw material and the target product. As a result, the yield was not increased. In addition, it was difficult to separate the raw material and the target product at the ring closure stage, and liquiritigenin tailed under the final chromatographic purification conditions, resulting in a significant reduction in recovery. In addition, two extra steps are required for the carcinogenicity of the MOM protecting reagent, and further protection and deprotection, and the second method was effective at the laboratory level, but it was found that it was not suitable for mass production.
そこで、リキリチゲニンの量産のため、クロマトグラフを使用せず、晶出させる方法を選択し、しかも発がん性のあるMOM保護試薬を使用せず、量産する方法が提案される。さらに人工的にイソリキリチゲニンをリキリチゲニンに変換する場合、平衡反応に伴って収率が向上しないという知見を得た。さらにまた、有機合成したリキリチゲニンは天然物と違って(+)体と(−)体が共存し、そのまま使用することが懸念され、(+)体は新たに毒性試験を必要とするとの知見をも得られた。そこで、本発明はリキリチゲニンの前駆物質であるイソリキリチゲニンを有効利用してリキリチゲニンの薬理効果を得る組成物を提供することを目的とする。 Therefore, for mass production of liquiritigenin, a method for mass production without using a chromatograph and selecting a method for crystallization and without using a carcinogenic MOM protecting reagent is proposed. Furthermore, the present inventors have found that when isolyticiligenin is artificially converted to liquiritigenin, the yield does not increase with the equilibrium reaction. Furthermore, the organically synthesized liquiritigenin, unlike natural products, may coexist in the (+) and (-) forms, and may be used as it is, and the (+) form requires a new toxicity test. Was also obtained. Therefore, an object of the present invention is to provide a composition that obtains a pharmacological effect of liquiritigenin by effectively using isoliquiritigenin, which is a precursor of liquiritigenin.
本発明者らは、有機合成的にイソリキリチゲニンをリキリチゲニンに変換すると天然物と違って(+)体と(−)体が共存するが、人体に有用な有機酸、特にクエン酸を主成分とする有機酸水溶液中で培養すると、(−)体のリキリチゲニンに変換されることに着目し、リキリチゲニンを有機合成せず、その前駆体であるイソリキリチゲニンを合成し、これを酸性の有機酸水溶液、特にクエン酸を主成分とする有機酸水溶液中で培養し、目的のリキリチゲニンに変換することを要旨とするもので、p−アルコキシ桂皮酸を出発原料とし、これにフィーデルクラフト反応を利用してp−アルコキシベンゼンをカップリングさせ、高収率でトリアルコキシイソリキリチゲニンが形成されて晶出し、これを脱保護してイソリキリチゲニンを得、このイソリキリチゲニンを有機酸、好ましくはクエン酸を主成分とする酸性、好ましくはpH3.5から4.5の有機酸水溶液中で培養してリキリチゲニン組成物とし、リキリチゲニン(−)体の薬理効果を得るものである。 The inventors of the present invention organically synthesized isoliqueritigenin into liquiritigenin coexist with (+) and (−) isomers, unlike natural products. However, organic acids useful for the human body, particularly citric acid, are mainly used. Focusing on the fact that when cultured in an organic acid aqueous solution as a component, it is converted to (-) liquiritigenin and does not synthesize liquiritigenin, but synthesizes its precursor, isoliquiritigenin, It is cultivated in an organic acid aqueous solution, particularly an organic acid aqueous solution containing citric acid as a main component, and converted to the target liquiritigenin. The starting material is p-alkoxycinnamic acid, and this is subjected to the Feedel Craft reaction. P-alkoxybenzene is used for coupling, and trialkoxyisolithicigenin is formed and crystallized in a high yield, which is deprotected to obtain isoliquiritigenin. Liquiritigenin is obtained by culturing liquiritigenin in an organic acid aqueous solution having an organic acid, preferably citric acid as a main component, preferably pH 3.5 to 4.5 to obtain a liquiritigenin (-) pharmacological effect. It is.
リキリチゲニン(−)体の薬理効果は特許公報第5611394号によれば、リキリチゲニン10μg/mlで、人肝臓がん細胞SMMC7721に対し96.08、人低分化胃線がんBOC−823に対し73.76、人早幼粒細胞白血病細胞HL−60に対し、64.40、人肺がん細胞A549に対しやや低いが35.06を示し、アドリアマイシンのがん細胞に対する抑制効果を上回っている(同公報第2表および第3表)。本発明によれば、最終的に有機合成による場合のようにリキリチゲニン(+)体と(−)体が共存しないので、収率の高いイソリキリチゲニンを有効利用することができる。また、人体に有用な有機酸、特にクエン酸を主成分とする有機酸水溶液中で培養するだけで上記薬理効果の高いリキリチゲニン(−)体を得ることができ、有機合成による場合よりも、リキリチゲニン(−)体の収率に優れる。また、有機合成による場合のように、リキリチゲニン(+)が共存しないから、毒性試験の必要もない。 According to Japanese Patent Publication No. 5611394, the pharmacological effect of liquiritigenin (−) body is 10 μg / ml liquiritigenin, 96.08 for human liver cancer cell SMMC7721, 73. for human poorly differentiated gastric line cancer BOC-823. 76, 64.40 for human early leukemic cell leukemia cell HL-60, 35.06 for human lung cancer cell A549, slightly higher than the inhibitory effect of adriamycin on cancer cells Tables 2 and 3). According to the present invention, since the liquiritigenin (+) form and the (-) form do not coexist as in the case of the final organic synthesis, it is possible to effectively utilize the high yield of isoliquiritigenin. In addition, the liquiritigenin (−) body having a high pharmacological effect can be obtained only by culturing in an organic acid aqueous solution mainly composed of citric acid, which is useful for the human body. (−) Excellent body yield. Moreover, since the liquiritigenin (+) does not coexist as in the case of organic synthesis, there is no need for toxicity tests.
本発明にかかるイソリキリチゲニンは図1で示すようにして製造することができる。
第1にカップリング反応(A)で、式(I)で示されるpーアルコキシ桂皮酸と式(II)で示される1,3−ジアルコキシベンゼンとから式(III)で示されるトリアルコキシイソリキリチゲニンを合成し、保護基を離脱してイソリキリチゲニンを合成する。式(I)、(II)、(III)はその一般式において、Rはメチル、エチルまたはブチルであるアルコキシ基であるのが望ましく、通常入手が容易なRがメチルであるメトキシ基が用いられる。反応は式(I)で示されるp−アルコキシ桂皮酸にハロゲン化剤を添加してハロゲン化し、そこに式(II)で示されるp−アルコキシベンゼンを添加し、次いで、触媒(金属ハロゲン化物、例えば塩化アルミニウム等)存在下に所定の芳香環の水素に求電子置換し、式(IIIa)で示されるトリアルコキシ桂皮酸が得られる。
The isoliquiritigenin according to the present invention can be produced as shown in FIG.
First, in the coupling reaction (A), a trialkoxyisoloxy represented by the formula (III) from p-alkoxycinnamic acid represented by the formula (I) and 1,3-dialkoxybenzene represented by the formula (II). Lithigenin is synthesized, and isolithicigenin is synthesized by removing the protecting group. In formulas (I), (II) and (III), R is preferably an alkoxy group in which methyl, ethyl or butyl is used, and a methoxy group in which R is methyl is usually available. . The reaction is halogenated by adding a halogenating agent to p-alkoxycinnamic acid represented by formula (I), to which p-alkoxybenzene represented by formula (II) is added, and then a catalyst (metal halide, For example, trialkoxycinnamic acid represented by the formula (IIIa) is obtained by electrophilic substitution of hydrogen of a predetermined aromatic ring in the presence of aluminum chloride or the like.
第2に反応式(B)では、この保護機を脱離すると、式(IV)で示される目的のイソリキリチゲニンが得られる。イソリキリチゲニンは閉環反応(C)により、式(IV)で示されるイソリキリチゲニンが式(V)で示されるリキリチゲニンに変換されるが、(+)体と(−)体が得られ、甘草から得られるリキリチゲニンは(−)体であるため、キラル分割により両者を分離する必要があり、製法が複雑となる。また、(+)体の毒性試験が必要であるので、イソリキリチゲニンのイソメラーゼ酵素を使って、リキリチゲニン(−)体を得るようにする必要がある。本発明ではイソメラーゼを使用することなく、クエン酸を主成分とする有機酸水溶液をpH3.5から4.5に調整し、これにイソリキリチゲニンを添加するとリキリチゲニンの(−)体を得ることができることを見出した。p−アルコキシ桂皮酸としてはp−メトキシ桂皮酸が好ましいが、p−エトキシ桂皮酸、p−ブトキシ桂皮酸を使用しても良い。以下の実施例では、具体的には式(ia)で示されるp−メトキシ桂皮酸と式(IIa)で示される1,3−ジメトキシベンゼンとから式(IIIa)で示されるトリメトキシイソリキリチゲニンを合成し、保護基を離脱してイソリキリチゲニンを合成する。 Secondly, in the reaction formula (B), when the protective device is removed, the target isoliquiritigenin represented by the formula (IV) is obtained. Isoliquiritigenin is converted to liquiritigenin represented by formula (V) by ring-closure reaction (C), and (+) and (−) isomers are obtained. Since liquiritigenin obtained from licorice is a (−) isomer, it is necessary to separate them by chiral resolution, which complicates the production method. In addition, since a toxicity test of the (+) form is necessary, it is necessary to obtain a liquiritigenin (-) form using an isomerase enzyme of isoliquiritigenin. In the present invention, without using isomerase, an organic acid aqueous solution containing citric acid as a main component is adjusted to pH 3.5 to 4.5, and by adding isoliquiritigenin to this, a (−) isomer of liquiritigenin is obtained. I found out that I can. As p-alkoxycinnamic acid, p-methoxycinnamic acid is preferable, but p-ethoxycinnamic acid and p-butoxy cinnamic acid may be used. In the following examples, specifically, trimethoxyisolithilic acid represented by the formula (IIIa) from p-methoxycinnamic acid represented by the formula (ia) and 1,3-dimethoxybenzene represented by the formula (IIa). Genine is synthesized, and the protective group is removed to synthesize isoliquiritigenin.
イソリキリチゲニンを培養する有機酸水溶液はクエン酸を主成分として構成される。クエン酸以外の有機酸としてはアスコルビン酸、アミノ酸、酢酸等の種々の有機酸を使用することができる。また、pH3.5から4.5とすることが重要であり、培養時間は短くてもよいが、10時間以上有機酸中で培養するのがよく、イソリキリチゲニンのリキリチゲニンへの変換を阻害しない限り、その他の付形剤を添加してもよい。 An organic acid aqueous solution for culturing isoliquiritigenin is composed mainly of citric acid. As organic acids other than citric acid, various organic acids such as ascorbic acid, amino acids, and acetic acid can be used. Further, it is important to adjust the pH to 3.5 to 4.5, and the culture time may be short, but it is preferable to culture in an organic acid for 10 hours or more and inhibit the conversion of isoliquiritigenin to liquiritigenin. Other excipients may be added as long as they are not.
以下、本発明の好ましい具体例を実施例に基づいて説明する。
(実施例1)
Hereinafter, preferred specific examples of the present invention will be described based on examples.
Example 1
式(Ia) 式(IIIa)
4-メトキシケイヒ酸 式(Ia)10gをジメチルホルムアミド0.25 mLを含む無水塩化メチレン50 mLに溶解し,室温にてオキザリルクロリド9.6 mLを発泡に注意しながら10分かけて滴下した。そのまま,室温にて2時間撹拌の後,溶媒を減圧下で除去した。得られた残渣に,1,3-ジメトキシベンゼン7.4 mL(式IIa)と無水エーテル200 mLを加え,氷浴中で,粉末にした触媒無水三塩化アルミニウム22.4 gを15分かけてゆっくりと加えた。そのまま室温にて一晩放置した後,内容物を氷上(500 g)にあけ,6M 塩酸を10 mL加え,氷が溶解した後,酢酸エチル(300 mL)で4回抽出した。抽出液を無水硫酸ナトリウムで乾燥後,減圧下で濃縮し,残渣をエーテル-ヘキサン混液で結晶化することにより,14.2 gの目的物(式IIIa)の結晶を得た。収率85% 1H-NMR (CDCl3) δ 7.73 (1H, d, J=8.1 Hz), 7.64 (1H, d, J=15.1 Hz), 7.54 (2H, d, J=7.7 Hz), 7.38 (1H, d, J=15.1 Hz), 6.90 (2H, d, J=7.7 Hz), 6.55 (1H, brd, J=8.1 Hz), 6.49 (1H, brs), 3.89 (3H, s), 3.85 (3H, s), 3.83 (3H, s).
Formula (Ia) Formula (IIIa)
10 g of 4-methoxycinnamic acid formula (Ia) was dissolved in 50 mL of anhydrous methylene chloride containing 0.25 mL of dimethylformamide, and 9.6 mL of oxalyl chloride was added dropwise at room temperature over 10 minutes while paying attention to foaming. After stirring for 2 hours at room temperature, the solvent was removed under reduced pressure. To the obtained residue, 7.4 mL of 1,3-dimethoxybenzene (formula IIa) and 200 mL of anhydrous ether were added, and 22.4 g of powdered catalyst anhydrous aluminum trichloride was slowly added over 15 minutes in an ice bath. . The mixture was allowed to stand at room temperature overnight, then the contents were poured on ice (500 g), 10 mL of 6M hydrochloric acid was added, and the ice was dissolved, followed by extraction four times with ethyl acetate (300 mL). The extract was dried over anhydrous sodium sulfate, concentrated under reduced pressure, and the residue was crystallized from an ether-hexane mixture to obtain 14.2 g of the desired product (formula IIIa). Yield 85% 1 H-NMR (CDCl 3 ) δ 7.73 (1H, d, J = 8.1 Hz), 7.64 (1H, d, J = 15.1 Hz), 7.54 (2H, d, J = 7.7 Hz), 7.38 (1H, d, J = 15.1 Hz), 6.90 (2H, d, J = 7.7 Hz), 6.55 (1H, brd, J = 8.1 Hz), 6.49 (1H, brs), 3.89 (3H, s), 3.85 (3H, s), 3.83 (3H, s).
式(IIIa) 式(III)
上記生成物3 gを塩化メチレン60 mLに溶解し0 ℃にて1 M BBr3塩化メチレン溶液を滴下した。室温まで昇温し,そのまま2日間撹拌した。セニエット塩34 gを含む氷冷水700 mLとメタノール350 mLを加え,室温で一晩撹拌した。得られた黄色溶液を酢酸エチルで2回抽出し,1 Mセニエット塩-飽和食塩水で洗浄後,無水硫酸ナトリウムで乾燥,濃縮した。残渣をエーテル-ヘキサンで結晶化し,目的物1.95 g(式IV)を得た。またその母液を濃縮後再度エーテル-ヘキサンで結晶化することにより0.59 gの目的物第2晶を得た。合計収率98%1H-NMR (acetone-d6) δ 13.5 (1H, s), 8.10 (1H, d, J=8.3 Hz), 7.82 (1H, d, J=15.4 Hz), 7.74 (1H, d, J=15.4 Hz), 7.72 (2H, d, J=8.2 Hz), 6.90 (2H, d, J=8.2 Hz), 6.44 (1H, dd, J=8.3 and 1.7 Hz), 6.34 (1H, d, J=1.7 Hz).
(実施例2)
Formula (IIIa) Formula (III)
3 g of the above product was dissolved in 60 mL of methylene chloride, and 1 M BBr 3 methylene chloride solution was added dropwise at 0 ° C. The mixture was warmed to room temperature and stirred for 2 days. Ice-cooled water (700 mL) containing 34 g of Sennet salt and methanol (350 mL) were added, and the mixture was stirred overnight at room temperature. The resulting yellow solution was extracted twice with ethyl acetate, washed with 1 M seniette-saturated brine, dried over anhydrous sodium sulfate and concentrated. The residue was crystallized from ether-hexane to obtain 1.95 g (formula IV) of the desired product. The mother liquor was concentrated and recrystallized from ether-hexane to obtain 0.59 g of the second crystal of the desired product. Total yield 98% 1 H-NMR (acetone-d 6 ) δ 13.5 (1H, s), 8.10 (1H, d, J = 8.3 Hz), 7.82 (1H, d, J = 15.4 Hz), 7.74 (1H , d, J = 15.4 Hz), 7.72 (2H, d, J = 8.2 Hz), 6.90 (2H, d, J = 8.2 Hz), 6.44 (1H, dd, J = 8.3 and 1.7 Hz), 6.34 (1H , d, J = 1.7 Hz).
(Example 2)
式(IV) 式(V)
原料200 mg(式IV)をpH4前後に調整したクエン酸水溶液に加え,撹拌し,よく分散した後に,1昼夜常温で放置した。その懸濁液を,常法で結晶化することにより粗結晶を得る(式V)。その分析値は以下の通りであり、リキリチゲニンへ変換されている。
1H-NMR (DMSO-d6) δ 9.65 (1H, brs), 7.58 (1H, m), 7.27 (2H, m), 6.74 (2H, m), 6.45 (1H, m), 6.28 (1H, m), 5.39 (1H, brd, J=11.6 Hz), 3.65 (1H, brt, J=15.0 Hz), 2.58 (1H, brd, J=15.7 Hz).
(実施例3)
Formula (IV) Formula (V)
200 mg (formula IV) of the raw material was added to an aqueous citric acid solution adjusted to around
1H-NMR (DMSO-d 6 ) δ 9.65 (1H, brs), 7.58 (1H, m), 7.27 (2H, m), 6.74 (2H, m), 6.45 (1H, m), 6.28 (1H, m ), 5.39 (1H, brd, J = 11.6 Hz), 3.65 (1H, brt, J = 15.0 Hz), 2.58 (1H, brd, J = 15.7 Hz).
(Example 3)
難消化デキストリン、N−アセチルグルコサミン、デキストリン、キチンオリゴ糖、キトサンオリゴ糖、乳酸、アスコルビン酸(ビタミンC)を主成分とする清涼飲料水50ml「長寿挑戦」:株式会社国際メディカル研究所販売は、pH3.9である。そこで、リキリチゲニンとしてイソリキリチゲニンを下記特許第5611394号明細書に記載の表2「リキリチゲニンのがん細胞に対する抑制作用」に示す用量(マウスに対する有効量)の約100〜2000倍のイソリキリチゲニンを添加し、免疫増強のためのサプリメントを形成した。
特許公報第5611394号の表2によれば、リキリチゲニン(−)体の薬理効果はリキリチゲニン10μg/mlで、人肝臓がん細胞SMMC7721に対し96.08、人低分化胃線がんBOC−823に対し73.76、人早幼粒細胞白血病細胞HL−60に対し、64.40、人肺がん細胞A549に対しやや低いが35.06を示すことが明らかにされている。
50ml “Longevity Challenge” of soft drinks consisting mainly of indigestible dextrin, N-acetylglucosamine, dextrin, chitin oligosaccharide, chitosan oligosaccharide, lactic acid, ascorbic acid (vitamin C): The pH is 3.9. Accordingly, as the liquiritigenin, isoliquiritigenin is about 100 to 2000 times the dose (effective amount for mice) shown in Table 2 “Inhibitory action of liquiritigenin on cancer cells” described in the following patent No. 5611394. Genin was added to form a supplement for immune enhancement.
According to Table 2 of Japanese Patent Publication No. 5611394, the pharmacological effect of liquiritigenin (−) is 10 μg / ml liquiritigenin, which is 96.08 against human liver cancer cell SMMC7721, and human poorly differentiated gastric line cancer BOC-823. On the other hand, 73.76, 64.40 for human early granulocyte leukemia cell HL-60, and 35.06 for human lung cancer cell A549 were shown to be slightly lower.
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