JP5264483B2 - ポリ乳酸合成のための有機酸系触媒 - Google Patents
ポリ乳酸合成のための有機酸系触媒 Download PDFInfo
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- JP5264483B2 JP5264483B2 JP2008521204A JP2008521204A JP5264483B2 JP 5264483 B2 JP5264483 B2 JP 5264483B2 JP 2008521204 A JP2008521204 A JP 2008521204A JP 2008521204 A JP2008521204 A JP 2008521204A JP 5264483 B2 JP5264483 B2 JP 5264483B2
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- acid
- catalyst
- lactic acid
- organic acid
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- C07D213/02—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members
- C07D213/04—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom
- C07D213/06—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom containing only hydrogen and carbon atoms in addition to the ring nitrogen atom
- C07D213/16—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom containing only hydrogen and carbon atoms in addition to the ring nitrogen atom containing only one pyridine ring
- C07D213/18—Salts thereof
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D233/00—Heterocyclic compounds containing 1,3-diazole or hydrogenated 1,3-diazole rings, not condensed with other rings
- C07D233/54—Heterocyclic compounds containing 1,3-diazole or hydrogenated 1,3-diazole rings, not condensed with other rings having two double bonds between ring members or between ring members and non-ring members
- C07D233/56—Heterocyclic compounds containing 1,3-diazole or hydrogenated 1,3-diazole rings, not condensed with other rings having two double bonds between ring members or between ring members and non-ring members with only hydrogen atoms or radicals containing only hydrogen and carbon atoms, attached to ring carbon atoms
- C07D233/58—Heterocyclic compounds containing 1,3-diazole or hydrogenated 1,3-diazole rings, not condensed with other rings having two double bonds between ring members or between ring members and non-ring members with only hydrogen atoms or radicals containing only hydrogen and carbon atoms, attached to ring carbon atoms with only hydrogen atoms or radicals containing only hydrogen and carbon atoms, attached to ring nitrogen atoms
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- Chemical & Material Sciences (AREA)
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- Polymers & Plastics (AREA)
- Polyesters Or Polycarbonates (AREA)
- Biological Depolymerization Polymers (AREA)
Description
1H−NMR(500MHz)スペクトル測定:
BRUKERDRX500 spectrometer(ブルカー社製)を使用した。
溶媒には標準化合物としてテトラメチルシラン(TMS)を0.03vol%g含むCDC13を用いた。
ゲル・パーミエーション・クロマトグラフィー(GPC)により測定した。
測定にはShimadzu LC- 6 AD pump、RID- 10A RI detector、Shimadzu CLASS-LC10 Chromatopac data processor、Shimadzu DGU-20A3 degasserを使用した。また、カラムはTSK-GEL G1000H,G2000HおよびG2500Hを用い、オーブン温度を40℃としてテトタヒドロフラン(THF)を流速1.0ml/minで流した。ポリマー40.0mgに対してTHF1.mlで試料を作製し、5μlを注入して測定した。重量平均分子量(Mw)及び分子量分布(Mw/Mn)はポリスチレンを標準としてキャリブレーションした。
L−乳酸の90wt%水溶液、SnCl2、p−トルエンスルホン酸−水和物、以上、和光純薬工業社製。
トリフルオロメタンスルホン酸:東京化成社製
ピリジン:東京化成社製
N−メチルイミダゾール:東京化成社製
トリフェニルホスフィン:和光純薬社製
2,3,4,5,6−ペンタフルオロアニリン5.0gをジクロロメタン25ml中に溶解させ、氷冷しながらCF3SO3H 2.4mlをゆっくり滴下し混合、攪拌した。析出した結晶を吸引ろ過し、ろ過物をジエチルエーテルで洗い、減圧乾燥した。やや紫がかった乳白色の結晶が得られた。収率は79.6%であった。融点は211.5℃であった。
200mlナスフラスコ中で塩化メチレン25mlにピリジン0.82mlを溶解し、氷冷、攪拌しながらトリフルオロメタンスルホン酸0.9mlを少しずつ滴下した。析出した結晶を吸引ろ過して減圧乾燥した。収率94.6%
参考文献:R. Cordone, W. D. Harman, H. Taube, J.Am.Chem.Soc. 1989, 111, 2896-2900.
200mlナスフラスコ中で塩化メチレン25mlにN−メチルイミダゾール0.81mlを溶解し、氷冷、攪拌しながらトリフルオロメタンスルホン酸0.9mlを少しずつ滴下した。析出した結晶を吸引ろ過して減圧乾燥した。収率92.3%
参考文献:Chaoyu Xie, M. A. Staszak, J. T. Quatroche, C. D. Sturgill, V. V. Khau, M.J. Martinelli, Organic Process Research & Development.2005, 9(6),730-737.
200mlナスフラスコ中で塩化メチレン25mlにトリフェニルホスフィン2.3gを溶解し、氷冷、攪拌しながらトリフルオロメタンスルホン酸0.9mlを少しずつ滴下した。塩化メチレン/ジエチルエーテル/ヘキサン=2/2/1の溶媒から析出した結晶を吸引ろ過して減圧乾燥した。収率78.9%
参考文献:van der Akker, M. Jellinek, Recl. Trav. Chim. Pays-Bas, 1967, 86, 275-288.
90%L−乳酸水溶液4.0ml、溶媒(トルエン)8.0ml、下記表1に示した触媒25ml(触媒/L−乳酸比:1.00mol%)をフラスコ内で混合した。Dean Stark trapを取り付け常圧下で系外に水を留去しながら22.5時間共沸脱水操作をおこなった。
次に、良好な触媒活性を示したPFPAT、ピリジニウムトリフレート、N−メチルイミダゾリウムトリフレート、トリフェニルホスホニウムトリフレート、p−トルエンスルホン酸およびSnCl2について触媒活性を比較した。トルエン中において表2に示した所定時間共沸脱水操作を行い、反応時間と分子量の相関を検証した。結果を表2に示した。
PFPATについて、表3に示したように触媒濃度及び溶媒(反応温度は各溶媒の沸点)を変化させて反応条件の最適化を検討した。反応時間は22.5時間とした。結果を表3に示した。表3の結果をグラフで表したのが図1である。
PFPAT、ピリジニウムトリフレート、トリフェニルホスホニウムトリフレートについて触媒濃度、反応時間、溶媒を変化させて反応を行った。結果を下記表4に示す。
次に生成したポリ−L−乳酸の立体化学について検討した。PFPATを用いてキシレン中で合成したポリ−L−乳酸サンプル(反応時間:22.5時間、触媒/L−乳酸比:0.1mo1%)について、2級メチル基をデカップルして1H−NMRを測定した。
触媒の再利用
L−乳酸4ml、トルエン8ml、トリフェニルホスホニウムトリフレート10.7mgを混合、Dean stark trapを取り付け常圧下で系外に水を留去しながら22.5時間重合を行った。トルエンをエバポレートした後、残渣を塩化メチレン20mlに溶解し、メタノール150ml中に投入し、ポリマーを沈殿させた。沈殿物を吸引ろ過し減圧乾燥した後、母液を回収しエバポレートした。この母液の濃縮物をL−乳酸4ml、トルエン8mlと混合、同様の重合操作を行ったところ、重量平均分子量7400のポリマーを収率64.6%で得た。
L−乳酸とアミノ酸(L−フェニルアラニン、グリシンまたはL−α−アラニン)(L−乳酸に対して10mol%)、および下記表5に示した触媒を触媒濃度0.1mol%とし、実施例1と同様にしてトルエン中において22.5時間共沸脱水操作を行った。共重合体の単離は、重合後、生成したポリマーをCH2Cl2に溶解させ、過剰のメタノールを加え再沈殿により行った。得られた沈殿を吸引ろ過後、減圧乾燥した。結果を表5中に示す。
(1)バルク重合
L−乳酸とL−フェニルアラニン(10mol%)、および触媒(PFPAT)(触媒/モノマー比:1.00×10−1mol%)の混合物を、トルエン中において1時間共沸脱水操作でオリゴマー化を行った。溶液から溶媒を留去し、残渣を減圧下(20mmHg)170℃で3時間加熱した。その後、さらに減圧(0.1mmHg)170℃で2時間加熱した。共重合体の単離は乳酸−アミノ酸共重合体の合成で行ったと同様の方法で行った。
Mw:5000、Mw/Mm:1.31、収率:27.8%、モノマー組成(LA/Phe)96/4の共重合体を得た。
L−乳酸とL−フェニルアラニン(10mol%)、および触媒(PFPAT)(触媒/モノマー比1.00×10−1mol%)の混合物を、キシレン中において24時間共沸脱水操作を行った。共重合体の単離は乳酸−アミノ酸共重合体の合成で行ったと同様の方法で行った。
Mw:9000、Mw/Mm:3.34、収率:27.8%の共重合体を得た。
L−乳酸と触媒(PFPAT)(触媒/モノマー比:1.00×10−1mol%)の混合物を、キシレン中において24時間共沸脱水操作でオリゴマー化を行った。その後、L−フェニルアラニンをL−乳酸に対して10mol%添加しさらに22.5時間加熱した。共重合体の単離は乳酸−アミノ酸共重合体の合成で行ったと同様の方法で行った。
Mw:37200、Mw/Mn:1.75、収率:77.5%、モノマー組成(LA/Phe):93/7の共重合体を得た。
Mw:2600、Mw/Mn:1.89、収率:28.7%、組成比(PBS/L−Phe=90/10)の共重合体を得た。
L−乳酸(LA)、グリコール酸(GA)またはR−マンデル酸(MA)を下記表6のモル比で混合し、トルエン溶媒中、トリフェニルホスホニウムトリフレート)(TPPT)(0.1mol%)存在下、22時間共沸脱水反応した。放冷後、トルエンを溜去し、残渣を塩化メチレンに溶解、過剰のメタノールにて沈殿させ、共重合体を濾取した。
グリコール酸(57mol%)−DL−ロイシン酸(43mol%)の混合物を触媒(TPPT 0.1mol%)存在下トルエン中120℃、24時間反応させ共重合体を得た。収率は12%であった。得られた共重合体の共重合比は、グリコール酸:ロイシン酸=81:19(モル比)であった。
グリコール酸(57mol%)−ラクトン(43mol%)の混合物を触媒(TPPT 0.1mol%)存在下キシレン中160℃、24時間反応させて共重合体を得た。ラクトンは、ε−カプロラクトン、δ−バレロラクトン、γ−ブチロラクトンを使用した。
コハク酸―ジオール―グリコール酸=1.5:1.5:7のモル比の混合物を触媒(TPPT 0.1mol%)存在下キシレン中160℃24反応させて共重合体を得た。
乳酸―リンゴ酸90:10(モル%)の混合物を触媒(TPPT 0.1mol%)存在下トルエン中130℃、24時間反応させ、共重合体を得た。収率は31%であり、得られた共重合体の共重合比は、乳酸:リンゴ酸=90:10(モル比)であった。
Claims (11)
- スルホン酸のアミン塩あるいはスルホン酸のホスフィン塩からなるポリ−L−乳酸を合成するための有機酸系触媒であって、
前記スルホン酸が、フッ素置換アルカンスルホン酸であり、
前記アミンが、芳香族アミンまたは含窒素複素環式化合物であり、
前記ホスフィンが、アリール基を含むホスフィンである、有機酸系触媒。 - フッ素置換アルカンスルホン酸が、トリフルオロメタンスルホン酸である、請求項1に記載の有機酸系触媒。
- 芳香族アミンが、2,3,4,5,6−ペンタフルオロアニリンである、請求項1に記載の有機酸系触媒。
- 含窒素複素環式化合物が、ピリジンまたはN−メチルイミダゾールである、請求項1に記載の有機酸系触媒。
- ホスフィンが、トリアリールホスフィン、アリールジアルキルホスフィン、又はジアリールアルキルホスフィンであるモノホスフィン、該モノホスフィンの組み合わせによるジホスフィン、もしくはトリホスフィンである請求項1に記載の有機酸系触媒。
- ホスフィンが、トリアリールホスフィンである、請求項1、2又は5に記載の有機酸系触媒。
- トリアリールホスフィンが、トリフェニルホスフィンである、請求項6に記載の有機酸系触媒。
- L−乳酸を脱水重縮合してポリ−L−乳酸を製造するに際して、請求項1〜7いずれかに記載の有機酸系触媒を使用することを特徴とする、ポリ−L−乳酸の製造方法。
- ヒドロキシカルボン酸を脱水重縮合してヒドロキシカルボン酸を製造するに際して、請求項1〜7いずれかに記載の有機酸系触媒を使用することを特徴とする、ポリヒドロキシカルボン酸の製造方法。
- 2種類以上のヒドロキシカルボン酸を脱水重縮合してヒドロキシカルボン酸共重合体を製造するに際して、請求項1〜7いずれかに記載の有機酸系触媒を使用することを特徴とする、ポリヒドロキシカルボン酸共重合体の製造方法。
- ヒドロキシカルボン酸とラクトンを開環−脱水重縮合してヒドロキシカルボン酸共重合体を製造するに際して、請求項1〜7いずれかに記載の有機酸系触媒を使用することを特徴とする、ポリヒドロキシカルボン酸共重合体の製造方法。
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WO2009142196A1 (ja) | 2008-05-21 | 2009-11-26 | 東レ株式会社 | 脂肪族ポリエステル樹脂の製造方法および脂肪族ポリエステル樹脂組成物 |
JP5387433B2 (ja) * | 2009-02-13 | 2014-01-15 | 東レ株式会社 | ポリ乳酸系樹脂の製造方法 |
FR2953523B1 (fr) * | 2009-12-08 | 2013-02-15 | Arkema France | Procede de preparation d'un polymere d'au moins un monomere cyclique |
JP5728781B2 (ja) * | 2011-01-05 | 2015-06-03 | 国立大学法人京都工芸繊維大学 | ラクチドの製造方法 |
WO2013133377A1 (ja) * | 2012-03-08 | 2013-09-12 | 国立大学法人京都工芸繊維大学 | ラクチドの製造方法 |
EP3215550B1 (en) | 2014-11-06 | 2024-10-16 | Teknologian Tutkimuskeskus VTT OY | Method of producing glycolic acid polymers |
KR20200026269A (ko) * | 2017-07-04 | 2020-03-10 | 가부시키가이샤 옵티마이저 | 변성 폴리젖산, 고분자화된 변성 폴리젖산과 이들의 제조 방법 및 제조 장치 |
WO2023282864A1 (en) * | 2021-07-09 | 2023-01-12 | Md Poli̇mer Gida Sanayi̇ Ti̇caret Li̇mi̇ted Şi̇rketi̇ | Synthesis of poly(lactic acid) catalyzed by nanoparticle metal |
WO2023076999A1 (en) | 2021-10-28 | 2023-05-04 | Exxonmobil Chemical Patents Inc. | Thermoplastic polyester copolymer, preparation and use thereof |
CN114621179B (zh) * | 2022-03-17 | 2024-03-26 | 中国神华煤制油化工有限公司 | 乙交酯的合成方法 |
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JP4080126B2 (ja) | 2000-02-04 | 2008-04-23 | 西川ゴム工業株式会社 | ポリ乳酸の製造方法 |
JP3745612B2 (ja) | 2000-10-31 | 2006-02-15 | 西川ゴム工業株式会社 | ポリヒドロキシカルボン酸の製造方法 |
JP3590393B2 (ja) | 2002-05-17 | 2004-11-17 | 株式会社ジェイ・コーポレーション | 生分解性プラスチックの製造方法とこれに用いる装置 |
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US20090176963A1 (en) | 2009-07-09 |
WO2007145195A1 (ja) | 2007-12-21 |
CN101466763B (zh) | 2013-03-13 |
CN101466763A (zh) | 2009-06-24 |
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