JP7394076B2 - 分岐鎖ケト酸(bcka)の混合物の製造方法 - Google Patents
分岐鎖ケト酸(bcka)の混合物の製造方法 Download PDFInfo
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- JP7394076B2 JP7394076B2 JP2020570116A JP2020570116A JP7394076B2 JP 7394076 B2 JP7394076 B2 JP 7394076B2 JP 2020570116 A JP2020570116 A JP 2020570116A JP 2020570116 A JP2020570116 A JP 2020570116A JP 7394076 B2 JP7394076 B2 JP 7394076B2
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- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K31/00—Medicinal preparations containing organic active ingredients
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Description
- 第1のステップにおいて、2種以上の分岐鎖ケト酸を混合し、
- 第2のステップにおいて、混合されたケト酸を1種または複数のアルカリ土類金属塩で共結晶化する方法を提供することによって解決される。
10~500mgのナトリウム、
10~500mgのカリウム、
50~500mgのカルシウム、
10~300mgのマグネシウム、
1~20mgの亜鉛、
5~50mgの鉄、
0.1~1mgのヨウ素、
5~100μgのセレン、
5~100μgのクロム、
最大100mgのビタミンB1、
最大100mgのビタミンB2、
最大100mgのビタミンB6、
最大200mgのビタミンB12、
最大5gのビタミンC、
最大500mgのビタミンE、
最大300mgのパントテン酸、
最大1gのナイアシン、
最大10mgの葉酸、
最大1mgのビオチン。
耐酸性容器に、ケトロイシン(22.8gのナトリウム塩を含有する、331gの6.9%w/wの溶液)、ケトイソロイシン(11.4gのナトリウム塩を含有する、61gの18.8%w/wの溶液)およびケトバリン(12.4gのナトリウム塩を含有する、144gの8.6%w/wの溶液)の各ナトリウム塩溶液を上で明記した濃度で加えて、2:1:1.2の活性ベースの比率を得た。この実施例で記載されるケトバリンの量は、新たな塩化用の液体の使用に適用する(記載については実施例5~7を参照)。リサイクルされた母液を使用する場合、ケトバリンの割合を1に減らすことができる。
そのそれぞれの遊離酸、ナトリウム塩またはカルシウム塩の形態としての以下のケト酸を水に添加して、次のモル比:約1:2:1のケトバリン:ケトロイシン:ケトイソロイシンの約5%w/vの溶液を得る。溶液を周囲温度にて塩酸水溶液でpH<1に調整し、次いで酸性溶液をメチルイソブチルケトン(MIBK)で抽出する。遊離ケト酸を含有するMIBK溶液を60℃に加熱し、次いで炭酸カルシウム固体を添加してpHを>3に調整する(目標:3~5、与えられた実施例ではわずかに超過した)。二相混合物を80℃に加熱し、これらの層を安定させて、次いで分離する。下側の水層(生成物含有)を80℃にてMIBKでさらに抽出して不純物を除去した後、真空蒸留して残りのMIBKを除去し、バッチを部分的に濃縮し、水層を周囲温度に冷却して生成物を結晶化する。固体を濾過により単離し、水で洗浄し、次いで乾燥するまで真空下で最大75℃にて乾燥させる。
ケトロイシン発酵溶液の約5%の水溶液を塩酸水溶液でpH約2に酸性化する。pHが>3になるまで(目標:約3~5)周囲温度にて炭酸カルシウム固体を加える。沈殿した固体を濾過により単離し、水で洗浄し、次いで乾燥するまで真空下で最大75℃にて乾燥させる。
カルシウム塩(一般的に炭酸カルシウム、水酸化カルシウム、または酢酸カルシウム)との遊離ケト酸の結晶化(またはより正確には塩化)のための方法は十分に確立されている。遊離ケト酸を、十分に希釈されている場合は水溶液として、または有機溶媒もしくはメチルイソブチルケトン、アセトン、tert-ブチルメチルエーテルなどの溶媒(ただしこれらに限定されない)中の溶液として添加することができる。
共結晶化の場合の出発遊離ケト酸の組成は、最終生成物における所望の比率を達成するために、カルシウム塩の溶解度の変動性を考慮する必要がある(比較表3は、20℃にてg/L単位での水への溶解度を示す)。
この場合では、耐酸性容器に、ケトロイシン(22.8gのナトリウム塩を含有する、331gの6.9%w/wの溶液)、ケトイソロイシン(11.4gのナトリウム塩を含有する、61gの18.8%w/wの溶液)およびケトバリン(12.4gのナトリウム塩を含有する、144gの8.6%w/wの溶液)のナトリウム塩溶液を表1に明記した濃度で加えて、2:1:1.2の活性ベースの比率を得た。この実施例で記載されるケトバリンの量は、塩化用の新たな液体の使用に適用する(記載については実施例5~7を参照)。リサイクルされた母液を使用する場合、ケトバリンの割合を1に減らすことができる。周囲温度にて撹拌して、約165gの50%w/wの硫酸を加えて、溶液のpHをpH<1に調整した。pH調整の後、加熱および真空を適用して、60~80℃/200~300mbarにて蒸留を達成した。さらに水を添加し、約42g/gケト酸が蒸留されるまで、270~300mbarの真空下で最大80℃にて蒸留した。蒸留物は約2.2重量%のBCKAを含有していた。
23.3gの水中の7.7g(約0.5モル当量)の酢酸カルシウムの溶液(約25%溶液)に、約12gの分岐鎖ケト酸を含有する550gの遊離ケト酸蒸留物を加えた。pHを確認した後、さらなる量の25%の酢酸カルシウム溶液を添加してpHを3~4にした。pHを調整した後、次のステップで記載されるとおりバッチを75~80℃に加熱し、250~350mbarの真空下で蒸留して、濃縮した。
バッチを75~80℃にて約15%w/wに濃縮し、次いで約20~25℃に冷却して結晶化した。約20~25℃にて約1時間撹拌した後、生成物を濾過により単離し、乾燥した。生成物の収量は11.8gであり、78%に対応した(出発材料を参照)。母液は次のバッチで使用するために保持した。
78gの母液に15g(0.5モル当量)の酢酸カルシウムを加えた。酢酸カルシウム/母液溶液に、2:1:1のケトロイシン:ケトイソロイシン:ケトバリンの比率で約12gの分岐鎖ケト酸を含有する550gの遊離ケト酸蒸留物を加えた。予想されるpHは3~4であった。バッチを75~80℃にて約11~13%w/wに濃縮し、次いで約20~25℃に冷却して結晶化した。約20~25℃にて約1時間撹拌した後、生成物を濾過により単離し、乾燥した。生成物の収量は12.2~14gであり、80~94%に対応した。母液は次のバッチで使用するために保持した。
BCKAの母液(約5%w/v)に分岐鎖ケト酸を、次のモル比、1.1:2:1のケトバリン:ケトロイシン:ケトイソロイシンで加える。混合物を60℃に加熱し、次いで約0.5モル当量の炭酸カルシウムを少しずつ加える。懸濁液を>75℃に加熱し、一定時間撹拌した後、反応混合物を周囲温度に冷却する。固体を濾過により単離し、水で洗浄し、乾燥する。
水(あるいは母液)中に1.1:2:1のケトバリン:ケトロイシン:ケトイソロイシンから構成される2当量のケト酸混合物を含む5~10%の溶液(単相または二相でもよい)を調製し、約50~70℃に加熱する。この温度にて、約1当量の水酸化カルシウムを加える。添加が完了した後、内容物を75~90℃に加熱して、固体を溶解し、次いで溶液を周囲温度に冷却する。得られた固体を濾過により単離し、水で洗浄する。固体を真空下で最大60℃にて乾燥することができる。達成された収率は40~80%であった。リサイクルされた母液を使用する場合、より高い収率が達成された。
以下のカルシウム塩は、(遊離酸を形成するために)実施例2および塩化/単離のために実施例4~7に記載されたものと類似の方法を使用して調製した。
・ケトフェニルアラニン/α-ヒドロキシメチオニン
・ケトフェニルアラニン/ケトバリン
・α-ヒドロキシメチオニン/ケトイソロイシン
水中の約1当量の酢酸マグネシウム四水和物の約5~10%の溶液に、1.1:2:1のケトバリン:ケトロイシン:ケトイソロイシン(BCKA)から構成されるケト酸混合物の30~60%のメチルイソブチルケトン(MIBK)溶液を50~75℃にて添加する。二相性溶液を温度相分離が行われる75~85℃に加熱する。水溶液を真空下で最大80℃にて最小体積に濃縮し、次いでn-ブタノールの添加後、再度濃縮してn-ブタノール残留水を除去して(共沸蒸留により)、固体を得る。固体は真空下で最大70℃にて乾燥することができる。達成された収率は約80~90%であった。分枝鎖ケト酸の様々なマグネシウム塩の特性を表4に示す。
ケトロイシンとケトイソロイシンとの混合マグネシウム塩、
ケトロイシンとケトバリンとの混合マグネシウム塩、および
ケトイソロイシンとケトバリンとの混合マグネシウム塩。
水中(あるいは母液)の2当量のケト酸を含む5~10%の溶液(単相または二相でもよい)を調製し、約50~70℃に加熱する。この温度にて、約1当量の水酸化マグネシウムを加える。添加が完了した後、固体が得られるまで内容物を75℃にて真空下で濃縮する。固体を乾燥する。達成された収率は>90%であった。
水中(または母液中)の2当量のケト酸を含む5~10%の溶液(単相または二相でもよい)を調製し、約50~70℃に加熱する。この温度にて、合計約1当量の水酸化マグネシウム/水酸化カルシウムを2:1、1:1または1:2の比率で加える。添加が完了した後、固体が得られるまで内容物を75℃にて真空下で濃縮する。固体を乾燥する。達成された収率は>90%であった。混合比の異なる分岐鎖ケト酸の混合カルシウム/マグネシウム塩の特性を表5に示す。
Claims (8)
- 2種以上のケト酸の均質な混合物を製造する方法であって、
- 第1のステップにおいて、2種以上の遊離ケト酸を混合し、
- 第2のステップにおいて、混合したケト酸を1種または複数のアルカリ土類金属塩で共結晶化する、
該2種以上のケト酸が、ケトロイシン、ケトバリンおよびケトイソロイシンから選択される、方法。 - アルカリ土類金属が、マグネシウムおよびカルシウムから選択される、請求項1に記載の方法。
- アルカリ土類金属塩が、炭酸カルシウム、水酸化カルシウム、酢酸カルシウム、塩化カルシウム、酸化カルシウム、水酸化マグネシウム、および酢酸マグネシウムから選択される、請求項1または2に記載の方法。
- 遊離ケト酸が、化学量論量のアルカリ土類金属塩を加えておいた水または母液溶液へ、所望のモル比で加えられる、請求項1から3のいずれか一項に記載の方法。
- 遊離ケト酸が、水溶液として添加される、請求項1から4のいずれか一項に記載の方法。
- 遊離ケト酸が、メチルイソブチルケトン、アセトンおよびtert-ブチルメチルエーテルから選択される有機溶媒の溶液として添加される、請求項1から4のいずれか一項に記載の方法。
- 混合ケト酸が、以下のもの:水蒸気蒸留、溶媒抽出、イオン交換クロマトグラフィー、またはアルカリ土類金属塩との粗結晶化のうちの1つを使用して、共結晶化ステップの前に精製される、請求項1から6のいずれか一項に記載の方法。
- 混合ケト酸が、複合水蒸気蒸留または溶媒抽出を使用して、共結晶化ステップの前に精製される、請求項7に記載の方法。
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EP18186513.0 | 2018-07-31 | ||
PCT/EP2019/070223 WO2020025489A1 (en) | 2018-07-31 | 2019-07-26 | Mixtures of branched chain keto acids (bcka) and method for the production of such mixtures |
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CN102988357A (zh) | 2011-09-14 | 2013-03-27 | 北大方正集团有限公司 | 一种复方α酮酸药物组合物及其制备方法 |
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WO2004012706A1 (en) | 2002-07-26 | 2004-02-12 | Medestea Research & Production S.R.L. | Pharmaceutical compositions containing keto-acids for endoperitoneal administration |
JP2012522739A (ja) | 2009-04-03 | 2012-09-27 | エボニック デグサ ゲーエムベーハー | 糖尿病療法の支援のためのα−ケト酸を含有する栄養補助剤 |
CN101991570A (zh) | 2009-08-14 | 2011-03-30 | 上海秀新臣邦医药科技有限公司 | 稳定的复方酮酸制剂及其制备方法 |
CN102988357A (zh) | 2011-09-14 | 2013-03-27 | 北大方正集团有限公司 | 一种复方α酮酸药物组合物及其制备方法 |
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WO2020025489A1 (en) | 2020-02-06 |
MX2021001082A (es) | 2021-03-31 |
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