JP7072003B2 - B型肝炎ウイルス表面抗原阻害剤 - Google Patents
B型肝炎ウイルス表面抗原阻害剤 Download PDFInfo
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- JP7072003B2 JP7072003B2 JP2019564542A JP2019564542A JP7072003B2 JP 7072003 B2 JP7072003 B2 JP 7072003B2 JP 2019564542 A JP2019564542 A JP 2019564542A JP 2019564542 A JP2019564542 A JP 2019564542A JP 7072003 B2 JP7072003 B2 JP 7072003B2
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- 125000002183 isoquinolinyl group Chemical group C1(=NC=CC2=CC=CC=C12)* 0.000 description 1
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- 229960001632 labetalol Drugs 0.000 description 1
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- 239000012280 lithium aluminium hydride Substances 0.000 description 1
- 208000019423 liver disease Diseases 0.000 description 1
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- 210000004698 lymphocyte Anatomy 0.000 description 1
- 231100001023 lymphopenia Toxicity 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
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- 229910001629 magnesium chloride Inorganic materials 0.000 description 1
- 229940098895 maleic acid Drugs 0.000 description 1
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- 229940099690 malic acid Drugs 0.000 description 1
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- 125000001434 methanylylidene group Chemical group [H]C#[*] 0.000 description 1
- XMJHPCRAQCTCFT-UHFFFAOYSA-N methyl chloroformate Chemical compound COC(Cl)=O XMJHPCRAQCTCFT-UHFFFAOYSA-N 0.000 description 1
- KTMKRRPZPWUYKK-UHFFFAOYSA-N methylboronic acid Chemical compound CB(O)O KTMKRRPZPWUYKK-UHFFFAOYSA-N 0.000 description 1
- 235000010755 mineral Nutrition 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 125000006682 monohaloalkyl group Chemical group 0.000 description 1
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- 210000005087 mononuclear cell Anatomy 0.000 description 1
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- 125000003136 n-heptyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 125000001280 n-hexyl group Chemical group C(CCCCC)* 0.000 description 1
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- 125000003935 n-pentoxy group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])O* 0.000 description 1
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- 125000001971 neopentyl group Chemical group [H]C([*])([H])C(C([H])([H])[H])(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
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- 125000005593 norbornanyl group Chemical group 0.000 description 1
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- 239000003960 organic solvent Substances 0.000 description 1
- 125000001715 oxadiazolyl group Chemical group 0.000 description 1
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- SFJGCXYXEFWEBK-UHFFFAOYSA-N oxazepine Chemical compound O1C=CC=CC=N1 SFJGCXYXEFWEBK-UHFFFAOYSA-N 0.000 description 1
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- YJVFFLUZDVXJQI-UHFFFAOYSA-L palladium(ii) acetate Chemical compound [Pd+2].CC([O-])=O.CC([O-])=O YJVFFLUZDVXJQI-UHFFFAOYSA-L 0.000 description 1
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- 229940049954 penicillin Drugs 0.000 description 1
- 125000006340 pentafluoro ethyl group Chemical group FC(F)(F)C(F)(F)* 0.000 description 1
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- ITMCEJHCFYSIIV-UHFFFAOYSA-N triflic acid Chemical class OS(=O)(=O)C(F)(F)F ITMCEJHCFYSIIV-UHFFFAOYSA-N 0.000 description 1
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- 125000002221 trityl group Chemical group [H]C1=C([H])C([H])=C([H])C([H])=C1C([*])(C1=C(C(=C(C(=C1[H])[H])[H])[H])[H])C1=C([H])C([H])=C([H])C([H])=C1[H] 0.000 description 1
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- PJVWKTKQMONHTI-UHFFFAOYSA-N warfarin Chemical compound OC=1C2=CC=CC=C2OC(=O)C=1C(CC(=O)C)C1=CC=CC=C1 PJVWKTKQMONHTI-UHFFFAOYSA-N 0.000 description 1
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- 125000001834 xanthenyl group Chemical group C1=CC=CC=2OC3=CC=CC=C3C(C12)* 0.000 description 1
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- A61K31/519—Pyrimidines; Hydrogenated pyrimidines, e.g. trimethoprim ortho- or peri-condensed with heterocyclic rings
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- A61K31/553—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having seven-membered rings, e.g. azelastine, pentylenetetrazole having at least one nitrogen and one oxygen as ring hetero atoms, e.g. loxapine, staurosporine
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- A61K31/708—Compounds having saccharide radicals and heterocyclic rings having nitrogen as a ring hetero atom, e.g. nucleosides, nucleotides containing six-membered rings with nitrogen as a ring hetero atom containing condensed or non-condensed pyrimidines containing purines, e.g. adenosine, adenylic acid having oxo groups directly attached to the purine ring system, e.g. guanosine, guanylic acid
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Description
本願は2017年5月22日に出願された中国特許出願201710365328.7の優先権を要求し、その内容をここで本願に取り入れる。
(技術分野)
本発明は、新規なB型肝炎表面抗原阻害剤としての11-オキソ-7,11-ジヒドロ-6H-ベンゾ[f]ピリド[1,2-d][1,4]オキサゼピン-10-カルボン酸誘導体に関し、具体的に、式(V)で表される化合物またはその薬学的に許容される塩、ならびにB型ウイルス性肝炎の治療における式(V)で表される化合物またはその薬学的に許容される塩および薬用組成物の使用に関する。
「*」が付いた炭素原子はキラル炭素原子で、(R)または(S)の単一の鏡像体の形態あるいは一つの鏡像体を多く含む形態で存在する。
本発明の一部の形態において、上記R2は
(ただし、
「*」が付いた炭素原子はキラル炭素原子で、(R)または(S)の単一の鏡像体の形態あるいは一つの鏡像体を多く含む形態で存在する。
かつL1およびL2は同時に単結合ではない。
本発明の一部の形態において、上記化合物、その異性体またはその薬学的に許容される塩では、「*」が付いた炭素原子はキラル炭素原子で、(R)の単一の鏡像体の形態あるいは一つの鏡像体を多く含む形態で存在する。
R1はH、OH、CN、NH2から選ばれ、あるいは任意に1、2または3個のRで置換されたC1-6アルキル基、C1-6ヘテロアルキル基、C2-5アルケニル基、C2-5ヘテロアルケニル基、C3-6シクロアルキル基または3~6員ヘテロシクロアルキル基から選ばれる。
本発明の一部の形態において、上記RはH、F、Cl、Br、I、OH、CN、NH2、CH3、CH3CH2、CH3O、CF3、CHF2、CH2Fから選ばれる。
本発明の一部の形態において、上記R1はH、OH、CN、NH2から選ばれ、あるいは任意に1、2または3個のRで置換されたC1-3アルキル基、C1-3ヘテロアルキル基、C2-3アルケニル基、C2-3ヘテロアルケニル基、C3-6シクロアルキル基または3~6員ヘテロシクロアルキル基から選ばれる。
本発明の一部の形態において、上記R3は任意に1、2または3個のRで置換された、C1-4アルキル基、C3-6シクロアルキル基から選ばれる。
本発明の一部の形態において、上記R3は
R4はHから選ばれ、あるいは任意に1、2または3個のRで置換された、C1-3アルキル基およびC1-3ヘテロアルキル基から選ばれる。
かつL1およびL2は同時に単結合ではない。
また、本発明は、以下の群から選ばれる化合物またはその薬学的に許容される塩を提供する:
[技術効果]
本発明は、創造的に新規な7員オキサゼピンを母核構造とする一連の化合物を設計・合成した。本発明の化合物は高い抗B型肝炎の体外活性を有し、活性が最も高い化合物はHBV-DNAおよびHBsAgをEC50がいずえも1nM以内に達するように抑制する。本発明の化合物のキラル中心は市販のアミノ酸を原料として製造され、合成プロセスが簡潔で、経済的で、既存の技術と比較すると、7員環における炭素が酸素に置き換えられると、化合物は水溶性が向上し、酸化代謝のリスクが低下することで、より優れた薬らしさが得られる。
[定義と説明]
別途に説明しない限り、本明細書で用いられる以下の用語および連語は以下の意味を有する。一つの特定の用語または連語は、特別に定義されない場合、不確定または不明瞭ではなく、普通の定義として理解されるべきである。本明細書で商品名が出た場合、相応の商品またはその活性成分を指す。本明細書で用いられる用語「薬学的に許容される塩」は、それらの化合物、材料、組成物および/または剤形に対するもので、これらは信頼できる医学的判断の範囲内にあり、ヒトおよび動物の組織との接触に適し、過剰な毒性、刺激性、アレルギー反応またはほかの問題または合併症があまりなく、合理的な利益/リスク比に合う。
本発明の化合物は当業者に熟知の様々な合成方法によって製造するができ、以下挙げられた具体的な実施形態、ほかの化学合成方法と合わせた実施形態および当業者に熟知の同等の代替方法を含み、好適な実施形態は本発明の実施例を含むが、これらに限定されない。
本発明に使用される溶媒は市販品として入手可能である。
以下、本発明を実施例により詳しく説明するが、本発明の何らの不利な制限にもならない。ここで、本発明を詳しく説明し、その具体的な実施例の形態も公開したため、本発明の精神と範囲を逸脱することなく、本発明の具体的な実施形態に様々な変更や改良を加えることができることは、当業者にとって明らかである。
[実施例1]
[実施例2]
[実施例3]
[実施例4]
[実施例5]
[実施例6]
工程B:化合物6-2(50.00 g,426.66 mmol)およびトリエチルアミン(59.39 mL,426.66 mmol)をジクロロメタン(500.00 mL)に溶解させ、ジカルボン酸ジ-t-ブチル(92.19 g,422.40 mmol)をジクロロメタン(100.00 mL)に溶解させ、0℃で1滴ずつ前の反応液に入れた。その後、反応液を25℃で12時間撹拌した。反応液を飽和食塩水(600.00 mL)で洗浄し、無水硫酸ナトリウムで乾燥し、有機相を減圧で濃縮して回転乾燥した後、メチル-t-ブチルエーテル/石油エーテル(50.00/100.00)で再結晶させ、化合物6-3を得た。
工程G:化合物6-8(8.70 g,36.21 mmol)をN,N-ジメチルホルムアミド(80.00 mL)に溶解させ、炭酸カリウム(10.01 g, 72.42 mmol)および化合物6-4(11.13 g, 39.83 mmol)を入れ、反応液を50℃で2時間撹拌した。反応液を1.00 mol/Lの塩酸水溶液(200.00 mL)でクエンチングし、酢酸エチル(150.00 mL×2)で抽出した。有機相を合併して水(150.00 mL×3)で洗浄し、無水硫酸ナトリウムで乾燥し、ろ過して減圧で濃縮し、化合物6-9を得た。
[実施例7]
[実施例8]
[実施例9]
[実施例10]
[実施例11]
工程B:化合物11-2(80.00 mg,189.63 μmol)、4-ジメチルアミノピリジン(231.67 μg,1.90 μmol)、トリエチルアミン(57.57 μg,568.89 μmol)をジクロロメタン(20.00 mL)に溶解させ、それにメチルカルバミド酸クロリド(35.47 mg, 379.26 μmol)を入れ、反応系を15℃で5時間撹拌した。それに水(15.00 mL)、ジクロロメタン45.00 mL(15.00 mL×3)を入れて抽出した後、合併した有機相を無水硫酸ナトリウムで乾燥し、そして減圧で蒸留して化合物11-3を得た。
[実施例12]
[実施例13]
工程D:化合物13-4(94.26 mg,192.42 μmol)を水(0.50 mL)に溶解させ、反応系を100℃で12時間撹拌した。反応液をpHが3~4になるように調整し、分取高速液体クロマトグラフィー(カラム:Boston Green ODS 150×30, 4 μm;移動相: [水(0.225%ギ酸)-アセトニトリル];溶離勾配:50%-80%,10.5分)によって精製して化合物実施例13を得た。
[実施例14]
[実施例15]
[実施例16]
[実施例17]
[実施例18]
[実施例19]
[実施例20]
[実施例21]
[実施例22]
[実施例23]
[実施例24]
[実施例25]
工程C:15℃において、化合物25-3(28.20 g,96.84 mmol)のジメチルホルムアミド(280.00 mL)溶液に炭酸カリウム(26.77 g, 193.69 mmol)及び25-4を入れた。混合液を50度で2時間撹拌した。混合液を飽和の塩化アンモニウム溶液(300.00 mL)に注ぎ、酢酸エチル(200.300 mL×2)で抽出し、得られた有機相を飽和食塩水(100.00 mL×2)で洗浄し、無水硫酸ナトリウムで乾燥し、45℃で減圧で濃縮して化合物25-5を得た。
工程E:化合物25-7(34.73 g, 134.40 mmol)を15℃で化合物25-6のトルエン溶液(120.00 mL)に入れた。混合液を120℃で12時間撹拌した後、化合物25-7 (9.98 g, 38.64 mmol)を追加し、続いて120℃で20時間撹拌した。そして、反応系にトリフルオロ酢酸(76.62 g, 672.00 mmol, 49.76 mL)を入れ、40℃で3時間撹拌した。反応液を45℃で減圧で濃縮し、飽和炭酸ナトリウム溶液(300.00 mL)でpH値が9~10になるように調整し、酢酸エチル(200.00 mL×2)で抽出し、有機相を合併し、飽和食塩水(200.00 mL×1)で洗浄し、無水硫酸ナトリウムで乾燥し、ろ過し、45℃で減圧で濃縮し、粗製品をシリカゲルカラムクロマトグラフィーによって精製して(石油エーテル:酢酸エチル=10:1~1:1)化合物25-8を得た。
[実施例26]
[実施例27]
[実施例28]
[実施例29]
実験例1:HBV体外テスト
1.実験目的:
リアルタイム定量qPCR試験(real time-qPCR)によってHepG2.2.15細胞の培養上清のHBV DNA含有量を、そして酵素結合免疫吸着測定(ELISA)によってHBV表面抗原の含有量を検出し、化合物のEC50値を指標とし、化合物のHBVに対する抑制作用を評価した。
2.1.細胞系:HepG2.2.15細胞
HepG2.2.15細胞培地(DMEM/F12,Invitrogen-11330032;10%血清,Invitrogen-10099141;100 units/mlペニシリンいよび100 μg/mlストレプトマイシン,Hyclone-SV30010;1% 非必須アミノ酸,Invitrogen-11140050;2 mm L-GLUTAMINE,Invitrogen-25030081;300 μg/ml Geneticin, Invitrogen-10131027
2.2.試薬:
トリプシン(Invitrogen-25300062)
DPBS (Corning-21031CVR)
DMSO (Sigma-D2650-100ML)
ハイスループットDNA精製キット(QIAamp 96 DNA Blood Kit,Qiagen-51162)
ファストスタートユニバーサルプローブマスター(FastStart Universal Probe Master,Roche-04914058001)
B型肝炎表面抗原定量検出キット(安図生物,CL 0310)
2.3.用品および機材:
96ウェル細胞培養プレート(Corning-3599)
CO2インキュベーター(HERA-CELL-240)
光学カバーフィルム(ABI-4311971)
定量PCR 96ウェルプレート(Applied Biosystems-4306737)
蛍光定量PCR装置(Applied Biosystems-7500 real time PCR system)
3.実験手順および方法:
3.1 HepG2.2.15細胞(4×104細胞/ウェル)を96ウェルプレートに接種し、37℃、5% CO2で一晩培養した。
50μlのサンプルおよび標準品を取ってそれぞれ反応プレートに入れ、さらに各ウェルにそれぞれ50μlの酵素結合物を入れ、振とうして均一に混合し、37℃で60分間インキュベートした後、洗浄液でプレートを5回洗浄し、さらに各ウェルに50μlの発光基質を入れ、均一に混合し、室温で光を避けて10分間反応させ、最後にマイクロプレートリーダーによって化学発光強度を検出した。
抑制百分率の計算:%Inh.=(1-サンプルにおける値/DMSO対照値)×100で算出した。
実施例6のヒト、CD-1マウスおよびSDラットの血漿におけるタンパク質結合率を測定した。ヒト、CD-1マウスおよびSDラットのブランク血漿を796 μL取り、4 μLの被験化合物の作業溶液(400 μM)またはワルファリンの作業溶液(400 μM)を入れ、血漿サンプルにおける被験化合物とワルファリンの濃度をいずれも2 μMとした。サンプルを十分に混合した。有機相DMSOの最終濃度は0.5%で、50 μLの被験化合物およびワルファリンの血漿サンプルをサンプル受け取りプレートに移し(3つの平行)、すぐに相応する体積の相応するブランクの血漿または緩衝液を入れ、各サンプルウェルの最終体積を100 μLとし、血漿:透析緩衝液の体積比は1:1で、さらにこれらのサンプルに400 μLの停止液を入れ、このサンプルをT0サンプルとして回収率および安定性の測定に使用した。T0サンプロを2~8℃で、ほかの透析されたサンプルとともに次の処理に供するまで保存し、150 μLの被験化合物およびワルファリンの血漿サンプルを各透析ウェルの投与末端に入れ、透析ウェルの相応する受け取り末端に150 μLのブランクの透析緩衝液を入れた。その後、透析プレートを通気膜で封止した後、湿潤で、5%CO2のインキュベーターにおいて、37℃で約100 rpmで振とうしながら4 hインキュベートした。透析終了後、50 μLの透析後の緩衝液サンプルおよび透析後の血漿サンプルを取って新しいサンプル受け取りプレートに移した。サンプルに相応する体積の相応するブランクの血漿または緩衝液を入れ、各サンプルウェルの最終体積を100 μLとし、血漿:透析緩衝液の体積比は1:1であった。すべてのサンプルはタンパク質沈殿を経てLC/MS/MS解析を行い、そして公式: タンパク質未結合率(%)= 100×透析膜を通った薬物濃度/透析液を通らなかった薬物濃度、タンパク質結合率(%)= 100 - %タンパク質未結合率、%回収率 = 100×(透析膜を通った薬物濃度+析液を通らなかった薬物濃度 / 透析前の合計薬物濃度によって、タンパク質結合率および回収率を計算した。
実施例6のヒト、CD-1マウスおよびSDラットの血漿におけるタンパク質結合率はそれぞれ55.7%、50.2%および59.4%であった。
被験化合物のヒトシトクロムP450アイソザイムの異なるサブタイプに対する抑制性を測定した。被験化合物、標準阻害剤(100×最終濃度)および混合基質作業溶液を用意し、-80℃冷蔵庫で凍結されたミクロソームを出して解凍した。2 μLの被験化合物および標準阻害剤溶液を相応するウェルに入れ、同時に2 μLの相応する溶媒を無阻害剤対照ウェル(NIC)およびブランク対照ウェル(ブランク)ウェルに入れた。次に、20 μLの混合基質溶液をブランクウェル以外(20 μLのPBをブランクウェルに入れた)の相応するウェルに入れた。ヒト肝臓ミクロソーム溶液(使用後、日付を記録してすぐ冷蔵庫に戻した)を用意し、そして158 μLのヒト肝臓ミクロソーム溶液をすべてのウェルに入れた。上記サンプルプレートを37℃水浴で予備インキュベートし、そして補酵素因子(NADPH)溶液を用意した。10分間後、20 μLのNADPH溶液をすべてのウェルに入れ、サンプルプレートを均一に振とうした後、37℃水浴で10分間インキュベートした。相応する時点で、400 μLの冷却されたアセトニトリル溶液(内部標準は200 ng/mLのトルブタミドとラベタロール)を入れて反応を停止させた。サンプルプレートを均一に混合した後、4,000rpmで20分間遠心し、タンパク質を沈殿させた。200 μLの上清を100 μLの水に入れ、均一に振とうした後、LC/MS/MS検出に供した。
実験目的:被験化合物(実施例6)の3つの種における肝臓ミクロソームの代謝安定性を測定した。
実験目的:雄のC57BL/6マウスまたはSDラットを被験動物とし、単回投与後の化合物の血漿、肝臓および脳脊髄液における薬物濃度を測定して薬物動態学の挙動を評価した。
実験目的:HDIマウスモデルによって実施例の化合物の体内抗B型肝炎ウイルス活性を評価した。
a)実験の設計は下記表6に示す。
サンプル処理:ELISA(酵素結合免疫吸着測定)によるマウスの血清におけるHBsAgの含有量の検出:実験手順はHBsAg ELISAキットの説明書を参照する
実験結果:被験化合物のマウスHDIモデルにおけるHBV複製に対する抑制活性はマウスの血漿におけるHBsAg含有量の検出で確認され、表7および図1で異なる投与時間のマウス血漿におけるHBsAgの含有量が示された。
同等の投与量では、5日目からHBsAgを低下させたというデータから、実施例6の化合物は表面抗原を低下させる能力がRG7834およびエンテカビルよりも優れ、より良い薬物効果を有することがわかる。
実験目的:
AAVベクターを介するHBV形質導入マウスモデルは快速で効率的なHBVモデルである。AAVベクターの高度の向肝性を利用し、1.3コピーのHBVゲノムを担持する組み換え8型アデノ随伴ウイルス(rAAV8-1.3HBV)をマウスに尾静脉から注射し、担持される1.3コピーのHBVゲノムを効率的に肝細胞に導入した。AAVウイルスベクターの特性によって、介されるベクターは長時間で持続的に発現することができ、AAV/HBVモデルでマウスの肝臓内において持続的にHBV DNAを複製してHBsAgとHBeAgを発現するようにさせることができる。
C57BL/6マウスで、10% HP-β-CDを溶媒とし、参照化合物TDF(テノホビル)、被験化合物、組み換えウイルスrAAV8-1.3HBVで、本項目の主な試薬はQIAamp96 DNAキットおよびTaqMan(登録商標) Universal PCR Master Mix、B型肝炎ウイルス表面抗原検出キットを含む。装置は、遠心機(Beckman Allegra X-15R)、組織研磨機(QIAGEN-Tissue lyser II)および分光光度計(Thermo-NANODROP 1000)を含む。
a)すべてのマウスは、ウイルスを注射してから28日目から経口投与し、その日を0日目とした。投与前に、すべてのマウスは顎下から採血して血清を収集した。毎日1回、4週連続で投与した。具体的な投与プランは表8を参照する。
ELISAによるマウスの血清におけるHBsAgの含有量の検出:実験手順はHBsAg ELISAキットの説明書を参照する。
a)血清におけるHBsAg含有量を検出して被験化合物のAAV/HBVマウスモデルにおける抗HBV活性を評価した。結果を表9および図2に示す。
本実験では、被験化合物実施例6はAAV/HBVマウスモデルの実験において、非常に顕著にHBsAgを低下させ、同時に一定の投与量と効果の関係があった。実施例6による治療過程において、マウスは良い耐性を示し、体重変化はRG7834よりも良かった。
本試験は、ラットに毎日1回、14日連続で被験品であるRG7834および実施例6を胃内投与することによってその潜在的な毒性を検出した。試験の設計は表10に示す。
RG7834:中・低投与量群では、心臓、肝臓および肺臓だけを検査し、被験品に関連する組織病理学の変化が見られなかった。高投与量群では、被験品に関連する組織病理学の変化の所見は、心臓のわずかな心筋変性、肝臓のわずかな小葉中央の肝細胞変性、脾臓の軽度の白脾髄のリンパ球減少、十二指腸の中度の粘膜の急性炎症であったことが示された。
実験目的:本試験は、SDラットに単回でRG7834、実施例6を経口胃内投与し、機能観察総合評価(FOB)によってそのSDラットに対する潜在的な行動学の神経毒性を評価した。
Claims (17)
- 式(I)の化合物、またはその薬学的に許容される塩
R 1 はOH、CN、NH2、
mは0、1、2、3、4または5から選ばれ,
mが0である場合、R 1 はOH、CN、NH 2 から選ばれなく、
または
R2はH、OH、CN、NH2、ハロゲンから選ばれ、あるいは任意に1、2または3個のRで置換されたC1-3アルキル基、C1-3ヘテロアルキル基、C3-6シクロアルキル基または3~6員ヘテロシクロアルキル基から選ばれ,
R3は任意に1、2または3個のRで置換された、C1-6アルキル基、C3-6シクロアルキル基から選ばれ,
RはH、ハロゲン、OH、CN、NH2から選ばれ、あるいは任意に1、2または3個のR’で置換されたC1-3アルキル基、C1-3ヘテロアルキル基から選ばれ、
R’は、F、Cl、Br、I、OH、CN、NH2、CH3、CH3CH2、CH3O、CF3、CHF2、CH2Fから選ばれ、
「ヘテロ」はヘテロ原子またはヘテロ原子団を表し、前記C 2-5ヘテロアルケニル基、3~6員ヘテロシクロアルキル基、C1-3ヘテロアルキル基の「ヘテロ」は、それぞれ独立に-C(=O)N(R)-、-N(R)-、-C(=NR)-、-(R)C=N-、-S(=O)2N(R)-、-S(=O)N(R)-、N、-O-、-S-、=O、=S、-C(=O)O-、-C(=O)-、-C(=S)-、-S(=O)-、-S(=O)2-、-N(R)C(=O)N(R)-から選ばれ、
以上のいずれの場合においても、ヘテロ原子またはヘテロ原子団の数はそれぞれ独立に1、2または3から選ばれる。] - RはH、F、Cl、Br、I、OH、CN、NH2、CH3、CH3CH2、CH3O、CF3、CHF2又はCH2Fから選ばれる、請求項1に記載の化合物、またはその薬学的に許容される塩。
- R1 はOH、CN、NH2から選ばれ、あるいは任意に1、2または3個のRで置換されたC 2-3アルケニル基、C2-3ヘテロアルケニル基、C3-6シクロアルキル基または3~6員ヘテロシクロアルキル基から選ばれる、請求項1または2に記載の化合物、またはその薬学的に許容される塩。
- R2はH、OH、CN、NH2、ハロゲンから選ばれ、あるいは任意に1、2または3個のRで置換されたC1-3アルキル基、C1-3ヘテロアルキル基、C3-6シクロアルキル基から選ばれる、請求項1または2に記載の化合物、またはその薬学的に許容される塩。
- R3は任意に1、2または3個のRで置換されたC1-4アルキル基、C3-6シクロアルキル基から選ばれる、請求項1または2に記載の化合物、またはその薬学的に許容される塩。
- mは0、1、2、3、4から選ばれ、mが0の場合、R1はOH、CN、NH2から選ばれない、請求項1または2に記載の化合物、またはその薬学的に許容される塩。
- 治療有効量の請求項1~15のいずれかに記載の化合物、またはその薬学的に許容される塩と、薬学的に許容される担体とを含む薬物組成物。
- B型肝炎の治療における使用のための、請求項1~15のいずれかに記載の化合物、またはその薬学的に許容される塩あるいは請求項16に記載の薬物組成物。
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