JP2013538849A - 結晶性ナロキソール−peg接合体 - Google Patents
結晶性ナロキソール−peg接合体 Download PDFInfo
- Publication number
- JP2013538849A JP2013538849A JP2013531533A JP2013531533A JP2013538849A JP 2013538849 A JP2013538849 A JP 2013538849A JP 2013531533 A JP2013531533 A JP 2013531533A JP 2013531533 A JP2013531533 A JP 2013531533A JP 2013538849 A JP2013538849 A JP 2013538849A
- Authority
- JP
- Japan
- Prior art keywords
- naloxol
- mpeg
- oxalate
- salt
- polyethylene glycol
- 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
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- 238000000034 method Methods 0.000 claims abstract description 36
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- 239000002202 Polyethylene glycol Substances 0.000 claims abstract description 29
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- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 claims description 51
- 238000000634 powder X-ray diffraction Methods 0.000 claims description 45
- 239000002253 acid Substances 0.000 claims description 42
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- WEVYAHXRMPXWCK-UHFFFAOYSA-N Acetonitrile Chemical compound CC#N WEVYAHXRMPXWCK-UHFFFAOYSA-N 0.000 claims description 30
- 235000006408 oxalic acid Nutrition 0.000 claims description 30
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Abstract
Description
本出願は、2010年9月30日出願の米国特許仮出願シリアル番号第61/388501号に優先権の利益を主張し、それは参照により本明細書に組み入れられる。
本明細書で使用される略号は次の通りである:DCM:ジクロロメタン;DMF:ジメチルホルムアミド;DSC:示差走査熱量測定;DVS:動的蒸気収着;EtOAc:酢酸エチル;IPA:2−プロパノール;IPE:ジイソプロピルエーテル;MEK:メチルエチルケトン;MeOH:メタノール;MeTHF:2−メチルテトラヒドロフラン;MIBK:メチルイソブチルケトン;MTBE:メチルt−ブチルエーテル;mPEG;末端メチル化ポリエチレングリコール;PEG;ポリエチレングリコール;PrCN:n−プロピルシアニド;RH:相対湿度;THF:テトラヒドロフラン;及びXRPD:X線粉末回折。本明細書で説明する開示の理解を容易にするために、多くの用語は下記の通りに定義される。一般的に本明細書で使用される命名法及び有機化学における実験手法、医薬品化学及び本明細書で記載される薬理学は、公知のものであり、そして当該分野で一般に使用されているものである。他に定義のない限り、本明細書で使用される技術的及び科学的用語は、通常は、本開示が属する当業者により普通に理解されているものと同じ意味を有する。
参照、例えば:
Remington: The Science and Practice of Pharmacy, 21st ed.;
Lippincott Williams & Wilkins: Philadelphia, PA, 2005; Handbook of Pharmaceutical Excipients, 6th ed.;
Rowe et al., Eds.; The Pharmaceutical Press and the American Pharmaceutical Association: 2009;
Handbook of Pharmaceutical Additives, 3rd ed.; Ash and Ash Eds.; Gower Publishing Company: 2007;
Pharmaceutical Preformulation and Formulation, 2nd ed.; Gibson Ed.; CRC Press LLC: Boca Raton, FL, 2009。
一つの態様において、mPEG7−O−ナロキソールの固体塩が提供される。ある実施態様において、mPEG7−O−ナロキソールの固体塩は結晶性である。幾つかの実施態様において、固体塩形態は、mPEG7−O−ナロキソールリン酸塩である。他の実施態様において、固体塩形態は、mPEG7−O−ナロキソールシュウ酸塩である。別の態様において、ナロキソール−ポリエチレングリールシュウ酸塩接合体を製造する方法が本明細書において提供され、ここで、 塩は、mPEG7−O−ナロキソール及びシュウ酸のイオン種を含み、それは下記の式である:
方法及び手法:以下に使用する試薬及び溶媒は、Aldrich Chemical Co. (Milwaukee, Wis., USA) などの市販薬から入手可能である。シュウ酸溶液は、シュウ酸二水和物から製造された。日常的な化学的、物理化学的分析は、当業者に公知の以下に示す標準的操作手法で実施した。例えば、ある分析は以下のパラグラフで記載する通りに実施した。
次の小スケール実験の結果は、固体形態におけるmPEG7−O−ナロキソールの製造における困難性を例示する。下記に説明する小スケール実験において、mPEG7−O−ナロキソール及び溶媒の混合物を準備し、そして種々の条件下で固体の生成を評価した。多数の酸の可能性のある対イオンは、それらがmPEG7−O−ナロキソールと固体塩を生成するか否かを評価するテストをおこなった。400を超える酸/溶媒の異なった組合せは、小スケール実験でテストした。表1に、小スケール実験でテストした酸対イオンを集約した。表1において、上付きで指示した酸対イオンは、また、スケールアップ塩実験でもテストした。以下の「スケールアップ実験」のセクションで説明する通り、小スケール実験から大スケール実験にスケールアップするとき、リン酸塩及びシュウ酸塩の固体形態を単離することのみ可能であった。
Lafayette, IN, USA)を用いて、混合物は、酸対イオンを五つの溶媒(アセトン、DCM、EtOAc、MeOH又はTHF)の内の一つを入れたマイクロプレートのウエル中の少量のmPEG7−O−ナロキソールに加えて作った。混合物は、酸に対するmPEG7−O−ナロキソールのモル比1:1を有していた。13種の酸対イオンを溶媒(例えば、ピログルタミン酸はMeOH中でテストし;安息香酸は、5つの溶媒のそれそれでテストした)の少なくとも一つで評価し、ここで、対イオンの大半は、少なくとも3つの異なった溶媒中でテストした。迅速な固体の沈殿が生成されないことを示す対イオンの添加後、透明溶液が各ウエルで観察された。同一の溶媒/対イオンの組合せを含む二つのウエルの内の一つを急速蒸発条件に従い、そして他のウエルは徐蒸発条件であった。各ウエルで蒸発させた後、油のみ観察された。酸対イオンの異なったセットは、以下に記載する手作業実験#2でテストした。
アジピン酸、デカン酸、フマル酸、マロン酸、メタンスルホン酸、シュウ酸、パモ酸、リン酸、及びトルエンスルホン酸を含む数個の酸は、それぞれ約30mgで、mPEG7−O−ナロキソール塩を生成するためのスケールアップの試みのために選択された。これらの実験に使用された溶媒は、THF、n−ヘキサン、シクロヘキサン、EtOAc、エーテル、DCM、IPE、アセトニトリル、MeOH、PrCN、ブタノール、アセトン及びそれらの混合物を含む。大半の例において、mPEG7−O−ナロキソール及び酸の溶媒中での混合物は、透明溶液を生成した。例えば、混合物が、幾つかの溶媒において、L−リンゴ酸又はマロン酸及びEtOAc、トルエンスルホン酸及びヘキサン及びシュウ酸を含むところ場合、幾つかの例外がある。混合物は沈殿を生成するために助力することを意図する様々な条件に従うが、それは次のパラグラフで簡単に説明する。
次の実施例は、mPEG7−O−ナロキソールのリン酸塩とシュウ酸塩形態の例示的な製造と特性評価を提供する。
単一の固体mPEG7−O−ナロキソールリン酸塩形態が次の手法を用いて得られた。
(1)遊離塩基(1g)を20℃でエタノールの2相対体積(2ml)中に溶解し;
(2)8相対体積(8ml)のMTBEを溶液に加え;
(3)リン酸溶液を、10相対体積(10ml)のMTBE中の1.01当量のリン酸(99質量%)を溶解することにより製造し;
(4)3%のリン酸溶液(0.3相対体積)を遊離塩基溶液に10分間に亘って20℃で加え;
(5)種結晶(1質量%)を加え、そして溶液を少なくとも30分間放置させ;
(6)残存酸溶液を5時間に亘って加え;
(7)溶液を2時間に亘って10℃に冷却し、そして少なくとも12時間その温度で維持し;
(8)その後、スラリーをろ過し;
(9)固体物質を10相対体積のMTBEで洗浄し、そして20℃、真空下で乾燥した。収率は約90%であった。この方法は、約400gのmPEG7−O−ナロキソールを用いて、10Lにスケールアップし、収率94%を得た。
1H−NMR、ppm(多重度、Hの数、可能なら、カップリング定数Hz):
1.34(m,1H),1.54−1.67(m,2H),1.73(dd,1H,4,14),1.77−1.85(m,1H),2.48(dt,1H,5,14),2.89(dt,1H,4,13),3.08(dd,1H,7,20),3.22(dd,1H,5,13),3.35(s,3H),3.38(d,1H,20),3.50−3.90(m,31H),4.01(m,1H),4.91(d,1H,5),5.60(d,1H,10),5.61(d,1H,17),5.87(m,1H),6.73(d,1H,8),6.82(d,1H,8)。
13C−NMR,ppm:20.1,23.0,27.2,29.1,45.3,45.8.55.7,58.0,62.4,69.1,69.4,69.51−69.54(シグナルの多重度),69.6,69.8,70.5,70.9,74.1,87.2,118.3,119.6,122.3,125.8,126.2,129.2,137.7,145.3。
次の実施例は、固体状態のmPEG7−O−ナロキソールシュウ酸塩の製造と特性評価を記載する。
(1)遊離塩基(1g)を20℃でエタノールの2相対体積(2ml)中に溶解し;
(2)8相対体積(8ml)のMTBEを溶液に加え;
(3)1.01当量のシュウ酸(98%)を10相対体積のMTBE(10ml)に溶解し;
(4)10%のシュウ酸溶液を遊離塩基溶液に、20℃で、5〜10分間に亘って加え(1.0相対体積):
(5)1質量%の種結晶を加え、少なくとも30分間放置し;
(5)残存酸溶液を2時間に亘って加えることを開始し;
(6)少なくとも2時間の追加熟成の後、スラリーをろ過し;
(7)MTBE10相対体積で洗浄し;及び
(8)真空下、20℃で乾燥する。
同じ方法を用いて、スケールアップし、フォームBのシュウ酸塩約400gを生成し、収率93%であった。
(1)遊離塩基(400mg)を、20℃で、2相対体積のアセトニトリル(800ml)と3.0当量の水(32.3ml)に溶解し;
(2)1.01当量(55.46g)のシュウ酸(98%)を11相対体積
(4400ml)の酢酸エチルに溶解し;
(3)60%のシュウ酸溶液を遊離塩基溶液に20℃で、約30分に亘って加え;
(4)1質量%の種結晶を加え、少なくとも30分間放置し;
(5)残存酸溶液を20℃で、2時間に亘って加えることを開始し;
(6)10℃で1時間冷却し;
(7)少なくとも1時間追加の熟成の後、スラリーをろ過し;
(8)アセトニトリル(1相対体積、400ml)と酢酸エチル(5.5相対体積、2200ml)の混合物で、10℃で洗浄し;
(9)2.5相対体積、(1000ml)の酢酸エチル、20℃で洗浄し;
(10)真空下、40℃で乾燥する。
1H−NMR、ppm(多重度、Hの数、可能な場合、カップリング定数Hz):1.35(m,1H),1.55−1.67(m,2H),1.74(dd,1H,4,14),1.77−1.85(m,1H),2.49(dt,1H,5,14),2.90(dt,1H,4,13),3.09(dd,1H,7,20),3.23(dd,1H,5,13),3.36(s,3H),3.39(d,1H,20),3.51−3.90(m,31H),4.01(m,1H),4.92(d,1H,5),5.60(d,1H,10),5.61(d,1H,17),5.88(m,1H),6.73(d,1H,8),6.83(d,1H,8)。
13C−NMR,ppm:20.0,23.0,27.2,29.1,45.3,45.8.55.7,58.0,62.4,69.1,69.4,69.5−69.5(シグナルの多重化),69.6,69.8,70.5,70.9,74.1,87.2,118.3,119.6,122.3,125.8,126.2,129.2,137.7,145.3,165.8。
mPEG7−O−ナロキソールシュウ酸塩フォームBの異なった保存条件下での安定性を、約5℃から約70℃の範囲の温度で、2週間又は4週間、相対湿度「RH」を変化させ、酸化防止剤を加えず、開放したボトルを用いて個々のサンプルを保存することにより評価した。保存後、サンプルを視覚的に検査し、その固体状態の形態をXRPDで分析し、そしてその後、表8でまとめる通り、グリシドアルデヒドを含む不純物をタンデムガスクロマトグラフィ/質量分析(出発サンプル)又は液体クロマトグラフィ/質量分析(残り全てのサンプル)により化学的に分析した。表8に、グリシドアルデヒド、mPEG7−O−ナロキソール遊離塩基の酸化分解生成物の濃度を、百万分率(ppm)で提供する。
経口投与用の固体B、mPEG7−O−ナロキソールシュウ酸塩フォームBを含む先見的な薬学的製剤は、以下の通りに提供される。
Claims (15)
- mPEG7−O−ナロキソールの結晶性シュウ酸塩。
- ナロキソール−ポリエチレングリコール接合体シュウ酸塩を製造する方法であって、ここで、塩は式:
方法は:
・mPEG7−O−ナロキソール遊離塩基を、2相対体積のエタノールに溶解する工程;
・8相対体積のメチルt−ブチルエーテルを、溶解したmPEG7−O−ナロキソール溶液に加える工程;
・メチルt−ブチルエーテル中のシュウ酸を、溶解したmPEG7−O−ナロキソールに少なくとも2時間に亘って加えてスラリーを生成する工程;及び
・スラリーをろ過して、固体形態のナロキソール−ポリエチレングリコール接合体シュウ酸塩を得る工程;
を含む、上記製造方法。 - 請求項2記載の方法に従って製造されたナロキソール−ポリエチレングリコール接合体シュウ酸塩。
- 塩が実質的に純粋な結晶形である、請求項5記載のナロキソール−ポリエチレングリコール接合体シュウ酸塩。
- 結晶形が実質的に図2で示されるものと同様のフォームAのX線粉末回折パターンを示す、請求項5に記載のナロキソール−ポリエチレングリコール接合体シュウ酸塩。
- 結晶形が、13.2;7.9;7.0;6.6;6.0;5.7;5.2;5.1;4.44;4.39;3.95;3.88;3.63;及び3.43を含むフォームBのX線粉末回折ピークd値(Å)を示す、請求項6に記載のナロキソール−ポリエチレングリコール接合体シュウ酸塩。
- X線粉末回折ピークd値(Å)が、13.2;12.0;9.7;9.4;8.3;8.2;7.9;7.4;7.0;6.6;6.0;5.7;5.6;5.4;5.2;5.1;4.91;4.86;4.78;4.71;4.48;4.44;4.39;4.17;4.09;3.95;3.91;3.88;3.69;3.63;3.43;3.29;3.14;及び3.01を含む、請求項8に記載のナロキソール−ポリエチレングリコール接合体シュウ酸塩。
- 結晶形が、6.72;11.24;12.65;13.44;14.72;15.61;17.01;17.34;19.98;20.21;22.50;22.93;24.53;及び25.99(°)において、フォームBのX線粉末回折2θ角ピークを示す、請求項6に記載のナロキソール−ポリエチレングリコール接合体シュウ酸塩。
- 少なくとも約90%の純度を有する請求項6に記載のナロキソール−ポリエチレングリコール接合体シュウ酸塩。
- 塩が室温と約150℃の間で、示差走査熱量測定で単一吸熱ピークを示し、そして単一吸熱ピークの最大値が、約91℃と約94℃の間で発生する、請求項6に記載のナロキソール−ポリエチレングリコール接合体シュウ酸塩。
- 請求項6に記載のナロキソール−ポリエチレングリコール接合体のシュウ酸塩及び薬学
的に許容可能な賦形剤を含んでなる薬学的組成物。 - 対象に対する経口投与用に製剤化された請求項13に記載の薬学的組成物。
- 21.0;12.1;7.9;6.5;5.3;4.83;4.24;3.81;及び3.75を含むXRPDのd値(Å)を有するナロキソール−ポリエチレングリコール接合体のシュウ酸塩。
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Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |