JPWO2012070649A1 - 溶解性の高いピロロキノリンキノン塩及びその製造方法 - Google Patents
溶解性の高いピロロキノリンキノン塩及びその製造方法 Download PDFInfo
- Publication number
- JPWO2012070649A1 JPWO2012070649A1 JP2012545805A JP2012545805A JPWO2012070649A1 JP WO2012070649 A1 JPWO2012070649 A1 JP WO2012070649A1 JP 2012545805 A JP2012545805 A JP 2012545805A JP 2012545805 A JP2012545805 A JP 2012545805A JP WO2012070649 A1 JPWO2012070649 A1 JP WO2012070649A1
- Authority
- JP
- Japan
- Prior art keywords
- salt
- pyrroloquinoline quinone
- pqq
- choline
- oxidized
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- MMXZSJMASHPLLR-UHFFFAOYSA-N pyrroloquinoline quinone Chemical class C12=C(C(O)=O)C=C(C(O)=O)N=C2C(=O)C(=O)C2=C1NC(C(=O)O)=C2 MMXZSJMASHPLLR-UHFFFAOYSA-N 0.000 title claims abstract description 226
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 14
- -1 pyrroloquinoline quinone ion Chemical class 0.000 claims abstract description 84
- 150000003863 ammonium salts Chemical class 0.000 claims abstract description 24
- OIPYSTKJCMVXJJ-UHFFFAOYSA-N OC(C1=CC(C(C(C2=NC(C(O)=O)=CC(C(O)=O)=C22)=O)=O)=C2N1)=O.N Chemical compound OC(C1=CC(C(C(C2=NC(C(O)=O)=CC(C(O)=O)=C22)=O)=O)=C2N1)=O.N OIPYSTKJCMVXJJ-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000004381 Choline salt Substances 0.000 claims description 43
- 235000019417 choline salt Nutrition 0.000 claims description 43
- 150000003839 salts Chemical class 0.000 claims description 29
- 239000000203 mixture Substances 0.000 claims description 27
- 229910052783 alkali metal Inorganic materials 0.000 claims description 24
- 150000003248 quinolines Chemical group 0.000 claims description 24
- QZMUBZJJJKIXKV-UHFFFAOYSA-N pyrroloquinoline quinol Chemical compound N1=C(C(O)=O)C=C(C(O)=O)C2=C(NC(C(=O)O)=C3)C3=C(O)C(O)=C21 QZMUBZJJJKIXKV-UHFFFAOYSA-N 0.000 claims description 22
- 239000003638 chemical reducing agent Substances 0.000 claims description 14
- 125000002768 hydroxyalkyl group Chemical group 0.000 claims description 13
- HMBHAQMOBKLWRX-UHFFFAOYSA-N 2,3-dihydro-1,4-benzodioxine-3-carboxylic acid Chemical group C1=CC=C2OC(C(=O)O)COC2=C1 HMBHAQMOBKLWRX-UHFFFAOYSA-N 0.000 claims description 10
- 125000000217 alkyl group Chemical group 0.000 claims description 10
- 229940075419 choline hydroxide Drugs 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 10
- 125000004432 carbon atom Chemical group C* 0.000 claims description 9
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims description 8
- 239000000908 ammonium hydroxide Substances 0.000 claims description 8
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 5
- 229910052799 carbon Inorganic materials 0.000 claims description 5
- 229910052739 hydrogen Inorganic materials 0.000 claims description 5
- 239000001257 hydrogen Substances 0.000 claims description 5
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 4
- 230000002378 acidificating effect Effects 0.000 claims description 3
- 230000001590 oxidative effect Effects 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 30
- 239000003960 organic solvent Substances 0.000 abstract description 10
- 125000002887 hydroxy group Chemical group [H]O* 0.000 abstract description 5
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 37
- 239000007787 solid Substances 0.000 description 30
- 230000002829 reductive effect Effects 0.000 description 25
- OEYIOHPDSNJKLS-UHFFFAOYSA-N choline Chemical group C[N+](C)(C)CCO OEYIOHPDSNJKLS-UHFFFAOYSA-N 0.000 description 23
- 229960001231 choline Drugs 0.000 description 21
- IAZDPXIOMUYVGZ-UHFFFAOYSA-N Dimethylsulphoxide Chemical compound CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 description 19
- 239000002904 solvent Substances 0.000 description 17
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 16
- 239000000126 substance Substances 0.000 description 16
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 15
- 239000007864 aqueous solution Substances 0.000 description 13
- 238000002360 preparation method Methods 0.000 description 13
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 12
- 239000000243 solution Substances 0.000 description 12
- 238000004458 analytical method Methods 0.000 description 10
- 238000006243 chemical reaction Methods 0.000 description 10
- CIWBSHSKHKDKBQ-JLAZNSOCSA-N Ascorbic acid Chemical compound OC[C@H](O)[C@H]1OC(=O)C(O)=C1O CIWBSHSKHKDKBQ-JLAZNSOCSA-N 0.000 description 8
- IAZDPXIOMUYVGZ-WFGJKAKNSA-N Dimethyl sulfoxide Chemical compound [2H]C([2H])([2H])S(=O)C([2H])([2H])[2H] IAZDPXIOMUYVGZ-WFGJKAKNSA-N 0.000 description 8
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 8
- 238000005160 1H NMR spectroscopy Methods 0.000 description 7
- 238000001644 13C nuclear magnetic resonance spectroscopy Methods 0.000 description 6
- 239000001763 2-hydroxyethyl(trimethyl)azanium Substances 0.000 description 6
- WEVYAHXRMPXWCK-UHFFFAOYSA-N Acetonitrile Chemical compound CC#N WEVYAHXRMPXWCK-UHFFFAOYSA-N 0.000 description 6
- 235000019743 Choline chloride Nutrition 0.000 description 6
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 6
- 229960003178 choline chloride Drugs 0.000 description 6
- SGMZJAMFUVOLNK-UHFFFAOYSA-M choline chloride Chemical compound [Cl-].C[N+](C)(C)CCO SGMZJAMFUVOLNK-UHFFFAOYSA-M 0.000 description 6
- 235000013305 food Nutrition 0.000 description 6
- 238000004255 ion exchange chromatography Methods 0.000 description 6
- 238000006722 reduction reaction Methods 0.000 description 6
- 235000002597 Solanum melongena Nutrition 0.000 description 5
- 238000003756 stirring Methods 0.000 description 5
- QXNVGIXVLWOKEQ-UHFFFAOYSA-N Disodium Chemical class [Na][Na] QXNVGIXVLWOKEQ-UHFFFAOYSA-N 0.000 description 4
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 4
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 238000002156 mixing Methods 0.000 description 4
- 125000004151 quinonyl group Chemical group 0.000 description 4
- 159000000000 sodium salts Chemical class 0.000 description 4
- 238000003786 synthesis reaction Methods 0.000 description 4
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 3
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 3
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- 238000005481 NMR spectroscopy Methods 0.000 description 3
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 3
- 239000002253 acid Substances 0.000 description 3
- 235000010323 ascorbic acid Nutrition 0.000 description 3
- 239000011668 ascorbic acid Substances 0.000 description 3
- 229960005070 ascorbic acid Drugs 0.000 description 3
- 238000005119 centrifugation Methods 0.000 description 3
- 239000003153 chemical reaction reagent Substances 0.000 description 3
- UFVBOGYDCJNLPM-UHFFFAOYSA-L disodium;9-carboxy-4,5-dioxo-1h-pyrrolo[2,3-f]quinoline-2,7-dicarboxylate Chemical compound [Na+].[Na+].C12=C(C([O-])=O)C=C(C([O-])=O)N=C2C(=O)C(=O)C2=C1NC(C(=O)O)=C2 UFVBOGYDCJNLPM-UHFFFAOYSA-L 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
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- 230000010354 integration Effects 0.000 description 3
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- 239000006228 supernatant Substances 0.000 description 3
- GVJHHUAWPYXKBD-UHFFFAOYSA-N (±)-α-Tocopherol Chemical compound OC1=C(C)C(C)=C2OC(CCCC(C)CCCC(C)CCCC(C)C)(C)CCC2=C1C GVJHHUAWPYXKBD-UHFFFAOYSA-N 0.000 description 2
- HNSDLXPSAYFUHK-UHFFFAOYSA-N 1,4-bis(2-ethylhexyl) sulfosuccinate Chemical compound CCCCC(CC)COC(=O)CC(S(O)(=O)=O)C(=O)OCC(CC)CCCC HNSDLXPSAYFUHK-UHFFFAOYSA-N 0.000 description 2
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 2
- OAKJQQAXSVQMHS-UHFFFAOYSA-N Hydrazine Chemical compound NN OAKJQQAXSVQMHS-UHFFFAOYSA-N 0.000 description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 2
- XUJNEKJLAYXESH-REOHCLBHSA-N L-Cysteine Chemical compound SC[C@H](N)C(O)=O XUJNEKJLAYXESH-REOHCLBHSA-N 0.000 description 2
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- XJLXINKUBYWONI-DQQFMEOOSA-N [[(2r,3r,4r,5r)-5-(6-aminopurin-9-yl)-3-hydroxy-4-phosphonooxyoxolan-2-yl]methoxy-hydroxyphosphoryl] [(2s,3r,4s,5s)-5-(3-carbamoylpyridin-1-ium-1-yl)-3,4-dihydroxyoxolan-2-yl]methyl phosphate Chemical compound NC(=O)C1=CC=C[N+]([C@@H]2[C@H]([C@@H](O)[C@H](COP([O-])(=O)OP(O)(=O)OC[C@@H]3[C@H]([C@@H](OP(O)(O)=O)[C@@H](O3)N3C4=NC=NC(N)=C4N=C3)O)O2)O)=C1 XJLXINKUBYWONI-DQQFMEOOSA-N 0.000 description 2
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- 230000001225 therapeutic effect Effects 0.000 description 1
- NQISDOIAJWWPGA-UHFFFAOYSA-N triethyl(3-hydroxypropyl)azanium Chemical class CC[N+](CC)(CC)CCCO NQISDOIAJWWPGA-UHFFFAOYSA-N 0.000 description 1
- GZBUMTPCIKCWFW-UHFFFAOYSA-N triethylcholine Chemical class CC[N+](CC)(CC)CCO GZBUMTPCIKCWFW-UHFFFAOYSA-N 0.000 description 1
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Classifications
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D471/00—Heterocyclic compounds containing nitrogen atoms as the only ring hetero atoms in the condensed system, at least one ring being a six-membered ring with one nitrogen atom, not provided for by groups C07D451/00 - C07D463/00
- C07D471/02—Heterocyclic compounds containing nitrogen atoms as the only ring hetero atoms in the condensed system, at least one ring being a six-membered ring with one nitrogen atom, not provided for by groups C07D451/00 - C07D463/00 in which the condensed system contains two hetero rings
- C07D471/04—Ortho-condensed systems
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K31/00—Medicinal preparations containing organic active ingredients
- A61K31/33—Heterocyclic compounds
- A61K31/395—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins
- A61K31/435—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with one nitrogen as the only ring hetero atom
- A61K31/47—Quinolines; Isoquinolines
- A61K31/475—Quinolines; Isoquinolines having an indole ring, e.g. yohimbine, reserpine, strychnine, vinblastine
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P1/00—Drugs for disorders of the alimentary tract or the digestive system
- A61P1/16—Drugs for disorders of the alimentary tract or the digestive system for liver or gallbladder disorders, e.g. hepatoprotective agents, cholagogues, litholytics
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P17/00—Drugs for dermatological disorders
- A61P17/02—Drugs for dermatological disorders for treating wounds, ulcers, burns, scars, keloids, or the like
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- A—HUMAN NECESSITIES
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- A61P27/00—Drugs for disorders of the senses
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- A—HUMAN NECESSITIES
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- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P3/00—Drugs for disorders of the metabolism
- A61P3/02—Nutrients, e.g. vitamins, minerals
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P3/00—Drugs for disorders of the metabolism
- A61P3/06—Antihyperlipidemics
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
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- A—HUMAN NECESSITIES
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- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P37/00—Drugs for immunological or allergic disorders
- A61P37/08—Antiallergic agents
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P43/00—Drugs for specific purposes, not provided for in groups A61P1/00-A61P41/00
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Abstract
Description
すなわち、本発明によれば以下の発明が提供される。
〔1〕式(1)で表される酸化型ピロロキノリンキノンアンモニウム塩。
〔2〕式(2)で表される還元型ピロロキノリンキノンアンモニウム塩。
〔3〕R1がヒドロキシエチル基を表し、R2、R3及びR4がメチル基を表す、〔1〕に記載の酸化型ピロロキノリンキノンアンモニウム塩。
〔4〕R1がヒドロキシエチル基を表し、R2、R3及びR4がメチル基を表す、〔2〕に記載の還元型ピロロキノリンキノンアンモニウム塩。
〔5〕〔1〕又は〔3〕記載の酸化型ピロロキノリンキノンアンモニウム塩と還元剤とを含んでなる組成物。
〔6〕酸化型ピロロキノリンキノンアンモニウム塩に対する還元剤の重量比が0.01から100の範囲である、〔5〕に記載の組成物。
〔7〕〔1〕又は〔3〕に記載の酸化型ピロロキノリンキノンアンモニウム塩と〔2〕又は〔4〕に記載の還元型ピロロキノリンキノンアンモニウム塩とを含んでなる組成物。
〔8〕酸化型若しくは還元型ピロロキノリンキノン又はそのアルカリ金属塩とアンモニウム塩とを含んでなる組成物。
〔9〕アンモニウム塩がコリン塩であり、酸化型若しくは還元型ピロロキノリンキノン又はそのアルカリ金属塩に対するコリン塩の重量比が0.01から2000の範囲である、〔8〕に記載の組成物。
〔10〕〔1〕に記載の式(1)で表される酸化型ピロロキノリンキノンアンモニウム塩又は〔2〕に記載の式(2)で表される還元型ピロロキノリンキノンアンモニウム塩の製造方法であって、酸化型又は還元型ピロロキノリンキノンのアルカリ金属塩を酸性条件下にした後、アンモニウムハイドロキサイドを混合させる工程を含むことを特徴とする、ピロロキノリンキノンアンモニウム塩の製造方法。
〔11〕アンモニウムハイドロキサイドがコリンハイドロキサイドであり、製造された塩が酸化型又は還元型のピロロキノリンキノンのコリン塩である、〔10〕に記載の製造方法。
島津製作所製高速液体クロマトグラフィーLC−20Aにカラム:YMC−Pack ODS−TMS(5μm)150×4.6mm I.D.を設置し、溶離液を100mM CH3COOH/100mM CH3COONH4(30/70,pH5.1)で260nmで検出した。
DIONEX製イオンクロマトグラフィーDX−120にCS12Aカラムをつけ、関東化学製ダイオネクス用陽イオン分析用溶離液CS12Aを使用した。
JEOL製500MHz NMR、JNM−ECA500スペクトルメーターを使用した。(DMSO−d6:2.529ppm基準)、13C−NMRで (DMSO−d6:39.5ppm基準)とした。
PQQジナトリウム塩の合成
特許第2692167号公報の実施例1に基づき、ハイホミクロビウム デニトリフィカンス(Hyphomicrobium denitrificans)DSM1869を培養して得られた培養液を遠心分離して、菌体を除去し、PQQを含有する培養上澄液を得た。尚、この菌株はDSM(Deutsche Sammlung von Microorganismen (German Collection of Microorganisms and Cell Cultures)から入手できるものである。
上記で得たジナトリウム塩2gを水198gに加え、NaOHでpH9にあわせた。この液に和光純薬製濃塩酸を50%希釈した液7.7gを攪拌しながら添加してpHを0.9にした。30分攪拌後、析出した固体をろ過し、水、イソプロパノールで洗浄し、さらに50℃で一晩減圧乾燥した。回収したPQQフリー体は、赤色結晶で重量1.6gであった。生成したPQQのフリー体を重DMSOで1H,13C−NMRを室温測定した。その結果、1H−NMRでは7.21, 8.60 ppm、13C−NMRでは113.5, 124.5, 126.4, 127.6, 129.2, 134.3, 136.3, 146.8, 148.7, 160.9, 164.9, 168.7, 173.3, 178.0ppmにケミカルシフトを示していた。
上記で得られたPQQのフリー体を使用した。フリー体0.62gを水に懸濁した。ここに東京化成製コリンハイドロキサイド(48〜50%)水溶液1.39gを加えた。均一な溶液になりpHは9.4になった。ここに塩化コリンを10g加えたが析出は生じなかった。ここに塩酸を加えるとpH4以下で固体が析出し、最終的にpHを3.5にした。これを4℃に冷却し、1時間後に遠心分離で固体を得た。これをイソプロパノールで3回洗浄し、減圧乾燥を一晩行った。赤い粉末0.64g得た。
実施例1と同様のPQQのフリー体を使用した。フリー体0.47gをイソプロパノール100mlに懸濁した。ここに東京化成製コリンハイドロキサイド(48〜50%)水溶液0.98gを加えた。反応が進むと溶液になった。これを300mlナスフラスコでエバポレーターを使用して溶媒を除去し、ヘキサンで洗浄し、乾燥して固体0.97gを得た。得られた固体は、エタノールに可溶の固体でPQQとコリンの比が約1.4であった。すなわち、PQQとコリンのモル比は約1:1.4であり、不定比なPQQコリン塩であった。
実施例1と同様のPQQのフリー体1.20gを水100mlに懸濁した。ここに東京化成製コリンハイドロキサイド(48〜50%)水溶液を約1.8g加え、30分かけてpHを3.2にした。これを300mlナスフラスコでエバポレーターを使用して溶媒を除去した。得られた固体をエタノールとイソプロパノール混合溶媒に溶かし、ヘキサンを加えると固体が析出した。上澄みをデカンテーションで除去し、固体を得た。この固体を減圧乾燥し、固体2gを得た。これを0.025mMに希釈して紫外可視スペクトル(220〜700nm)を測定した結果、酸化型ナトリウム塩と同じスペクトルであった。PQQの構造は維持されていた。LC分析とイオンクロマトグラフィー分析からPQQとコリンのモル比は1:1.9で、PQQジコリン塩であった。
実施例1と同様のPQQのフリー体を使用した。フリー体1.16gを水25mlに懸濁した。ここに東京化成製コリンハイドロキサイド(48〜50%)水溶液を約2.1g加え、その後塩酸を加えて、30分かけてpHを7.5にした。これを300mlナスフラスコでエバポレーターを使用して溶媒を除去し、エタノールとヘキサンを加えると固体が析出した。上澄みをデカンテーションで除去し、固体を得た。この固体を減圧乾燥し、固体2.3gを得た。この固体はアセトニトリル、イソプロパノール、ジメチルスルホキシドに溶解できた。LC分析とイオンクロマトグラフィー分析からPQQとコリンのモル比は1:2.4で、不定比なPQQコリン塩であった。
実施例1と同様のPQQのフリー体を使用した。フリー体0.34gを水25mlに懸濁した。ここに東京化成製コリンハイドロキサイド(48〜50%)水溶液を約0.75g加えpHを9にした。一晩攪拌後これを300mlナスフラスコでエバポレーターを使用して溶媒を除去した。ヘキサンで洗浄し固体を得た。この固体を減圧乾燥し0.67g得た。LC分析とイオンクロマトグラフィー分析からPQQとコリンのモル比は1:3で、PQQトリコリン塩であった。
溶解性試験
PQQジナトリウムは実施例1に記載の方法の物質を使用した。また、PQQモノコリン塩は実施例1のコリン塩を使用し、PQQ1.4コリン塩は実施例2のコリン塩を使用し、PQQジコリン塩は実施例3のコリン塩を使用し、PQQ2.4コリン塩は実施例4を使用し、PQQトリコリン塩は実施例5のコリン塩を使用した。
PQQジナトリウム0.1gに対し、塩化コリンを所定量加えた。これにエタノール8ml加え、上澄みの450nmでの吸光度を測定した。塩化コリンを加えていない比較例3を標準とし、PQQの溶解量を算出した結果を以下の表2に示す。
実施例3で生成したPQQジコリンを0.5mMの水溶液とアスコルビン酸10mMの水溶液を2ml容器中で等量混合した。これを水で10倍に希釈して紫外可視スペクトル(220−700nm)を測定した。新たなピークが300nm付近に現れ、Bull. Chem. Soc. Jpn. 59巻、1911〜1914頁(1986)に示される還元反応が進んでいることがわかった。転化率が70℃15時間で100%と室温20時間で63%であった。このようにPQQジコリン塩から、対応するコリン塩の還元体を作製することができた。
実施例1で作製したPQQのフリー体0.47gを水20mlに懸濁した。pHメーターで観察しながらそこに和光製トリエタノールアミンを加え、pH3.7にした。反応が進むと溶液になり、これを一晩攪拌した。得られた溶液を300mlナスフラスコでエバポレーターを使用して溶媒を除去し、イソプロパノールで洗浄し、減圧乾燥して固体0.79g得た。これをLC、イオンクロマトグラフィーで分析した結果、PQQに対してトリエタノールアミンが1:2のモル比で塩を形成していることが分かった。
Claims (11)
- R1がヒドロキシエチル基を表し、R2、R3及びR4がメチル基を表す、請求項1に記載の酸化型ピロロキノリンキノンアンモニウム塩。
- R1がヒドロキシエチル基を表し、R2、R3及びR4がメチル基を表す、請求項2に記載の還元型ピロロキノリンキノンアンモニウム塩。
- 請求項1又は3に記載の酸化型ピロロキノリンキノンアンモニウム塩と還元剤とを含んでなる組成物。
- 酸化型ピロロキノリンキノンアンモニウム塩に対する還元剤の重量比が0.01から100の範囲である、請求項5に記載の組成物。
- 請求項1又は3に記載の酸化型ピロロキノリンキノンアンモニウム塩と請求項2又は4に記載の還元型ピロロキノリンキノンアンモニウム塩とを含んでなる組成物。
- アンモニウム塩がコリン塩であり、酸化型若しくは還元型ピロロキノリンキノン又はそのアルカリ金属塩に対するコリン塩の重量比が0.01から2000の範囲である、請求項8に記載の組成物。
- アンモニウムハイドロキサイドがコリンハイドロキサイドであり、製造された塩が酸化型又は還元型のピロロキノリンキノンのコリン塩である、請求項10に記載の製造方法。
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