JP2017531038A - 新規5,6−ジヒドロ−4H−ベンゾ[b]チエノ−[2,3−d]アゼピン誘導体 - Google Patents
新規5,6−ジヒドロ−4H−ベンゾ[b]チエノ−[2,3−d]アゼピン誘導体 Download PDFInfo
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- JP2017531038A JP2017531038A JP2017538466A JP2017538466A JP2017531038A JP 2017531038 A JP2017531038 A JP 2017531038A JP 2017538466 A JP2017538466 A JP 2017538466A JP 2017538466 A JP2017538466 A JP 2017538466A JP 2017531038 A JP2017531038 A JP 2017531038A
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- 230000001120 cytoprotective effect Effects 0.000 description 1
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- A61K31/407—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having five-membered rings with one nitrogen as the only ring hetero atom, e.g. sulpiride, succinimide, tolmetin, buflomedil condensed with other heterocyclic ring systems, e.g. ketorolac, physostigmine
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Abstract
Description
本発明は、新規の化合物、それを含む組成物、該化合物を製造する方法、及び治療におけるその使用に関する。本発明の化合物は、呼吸器合胞体ウイルス感染及び関連疾患、特に、そのA株及びB株によって引き起こされる感染を治療又は予防することが意図される。
ヒト呼吸器合胞体ウイルス(RSV)は、パラミクソウイルス科のニューモウイルスであり、1歳未満の幼児の細気管支炎及び肺炎の最も一般的な原因である。ほとんどの子供はその2歳の誕生日より前にRSVに感染し、75〜125,000人が入院に至る。関連医療費は、米国だけで年間6億5000万ドルを超えると考えられる。さらに、若年期の呼吸器ウイルス感染、とりわけ、RSVによるものは、その後の小児喘息の発症のリスクを増大させる(Holt及びSlyの文献、2002)。RSV感染は、あらゆる年齢の患者において重度の下気道疾患を生じさせ得る。高齢者及び心臓、肺、又は免疫系障害を有する者が特に影響を受けやすく、65歳を超える対象では、米国で年間約14,000件の死亡が発生すると推定される。さらに、RSV感染は、慢性閉塞性肺疾患(COPD)(Mohanらの文献、2010)並びに喘息(Newcomb及びPeeblesの文献、2009)及び嚢胞性線維症(Abmanらの文献、1988)に罹患している患者における重要な増悪促進因子(precipitator of exacerbation)であると次第に考えられつつある。免疫不全の成人では、RSVによる上気道感染の約50%が肺炎に進行する。
第1の態様において、本発明は: N-(2-フルオロ-6-メチルフェニル)-6-(4-(5-メチル-2-(7-オキサ-2-アザスピロ[3.5]ノナン-2-イル)ニコチンアミド)ベンゾイル)-5,6-ジヒドロ-4H-ベンゾ[b]チエノ[2,3-d]アゼピン-2-カルボキサミドである、式(I)の化合物又はその医薬として許容し得る塩(「本発明の化合物」)を提供する。
式(I)の化合物の医薬として許容し得る塩には、特に、該化合物の医薬として許容し得る酸付加塩が含まれる。式(I)の化合物の医薬として許容し得る酸付加塩は、式(I)の化合物が形成することができる治療的に活性のある無毒な酸付加塩を含むことが意図される。これらの医薬として許容し得る酸付加塩は、遊離塩基形態を、好適な溶媒又は溶媒混合物中にて、そのような適当な酸で処理することによって好都合に得ることができる。適当な酸は、例えば、無機酸、例えば、ハロゲン化水素酸、例えば、塩酸もしくは臭化水素酸、硫酸、硝酸、リン酸など;又は有機酸、例えば、酢酸、プロパン酸、ヒドロキシ酢酸、乳酸、ピルビン酸、マロン酸、コハク酸、マレイン酸、フマル酸、リンゴ酸、酒石酸、クエン酸、メタンスルホン酸、エタンスルホン酸、ベンゼンスルホン酸、p-トルエンスルホン酸、シクラミン酸、サリチル酸、p-アミノサリチル酸、パモン酸などを含む。
RSV A株、例えば、A2株によって引き起こされるヒト(又は動物モデル又はインビトロ系)での細胞変性効果及び/又はウイルス複製及び/又はF-タンパク質発現の強力な阻害;
RSV B株によって引き起こされるヒト(又は動物モデル又はインビトロ系)での細胞変性効果及び/又はウイルス複製及び/又はF-タンパク質発現の強力な阻害;
好ましくは、1日1回の投与と合致する、肺での長い作用持続時間;並びに
とりわけ、肺又は鼻への局所投与後の、許容される安全性プロファイル。
出発材料及び溶媒は全て、商業的供給源から得られたか、又は文献引用に従って調製されたかのいずれかであった。別途明記されない限り、反応液は全て撹拌した。有機溶液は、ルーチンに無水硫酸マグネシウム上で乾燥させた。水素化は、記載された条件下にて、Thales H-cubeフロー反応器で実施した。
Waters X-Select CSHカラムC18、5μm(19×50mm)、流量28mL 分-1、0.1%v/vギ酸を含むH2O-MeCN勾配で6.5分かけて溶出させ、254nmでのUV検出を使用する。勾配情報:0.0〜0.2分、35%MeCN;0.2〜5.5分、35%MeCNから65%MeCNに上昇させる;5.5〜5.6分、65%MeCNから95%MeCNに上昇させる; 5.6〜6.5分、95%MeCNで保持する。
(LCMS分析の逆相HPLC条件:)
Waters Xselect CSH C18 XPカラム、2.5μm(4.6×30mm)、40℃;流量2.5〜4.5mL 分-1、0.1%v/vギ酸を含むH2O-MeCN勾配で4分かけて溶出させ、254nmでのUV検出を利用する。勾配情報: 0〜3.00分、95%H2O-5%MeCNから5%H2O-95%MeCNに上昇させる; 3.00〜3.01分、5%H2O-95%MeCNで保持し、流量を4.5mL 分-1に増大させる; 3.01〜3.50分、5%H2O-95%MeCNで保持する; 3.50〜3.60分、95%H2O-5%MeCNに戻し、流量を3.50mL 分-1に減少させる; 3.60〜3.90分、95%H2O-5%MeCNで保持する; 3.90〜4.00分、95%H2O-5%MeCNで保持し、流量を2.5mL 分-1に減少させる。
スペクトルは、残存する非重水素化溶媒を参照として用いて、400MHzで、Bruker Avance IIIスペクトロメーターで獲得し、別途指定されない限り、DMSO-d6中で泳動させた。
本発明の化合物を調製するために使用されている非限定的な合成戦略が以下にまとめられている(スキーム1)。開示されている化合物(I)への経路は全て、市販の出発材料から3工程で容易に入手できるアゼピン誘導体の中間体(VIIIa)から生じる。主な変化は、合成変換を該鍵中間体(VIIIa)に適用し、それにより、化合物(I)への3つの異なる前駆体:すなわち、中間体(II)、(III)、及び(IV)を生成させる順序から生じる。経路1は、チオフェンカルボン酸(II)と2-フルオロ-6-メチルアニリンのアミドカップリングを含む。代わりの調製方法である経路2は、スピロ環式アミン: 7-オキサ-2-アザスピロ[3.5]ノナンを用いたSNAr置換反応による2-クロロニコチンアミド中間体(III)からの化合物(I)の形成を利用する。この手順は、化合物(I)を、0.5kgを超える単一バッチで提供するためにスケールアップされたものであり、この合成作戦も本明細書で以下に記載されている。化合物(I)への第3のアプローチは、アニリン(IV)と予め形成された2-アミノニコチン酸(VI)との間のアミドカップリング反応からなる経路3である。
スキーム1:化合物(I)の調製に使用される合成経路
(触媒還元法)
鉄粉(5.29g、94.7mmol)及びエチル 6-(4-ニトロベンゾイル)-5,6-ジヒドロ-4H-ベンゾ[b]チエノ[2,3-d]アゼピン-2-カルボキシレート(8.00g、18.9mmol)のIPA(80mL)懸濁液に、飽和水性塩化アンモニウム(8.0mL)を添加した。得られた混合物を80℃で1時間撹拌し、その後、セライトに通して濾過した。セライトパッドをMeOH(1.5L)で洗浄し、合わせた濾液を真空中で蒸発させた。得られた残渣を水(400mL)及びジエチルエーテル(400mL)でトリチュレーションし、真空中で乾燥させると、表題化合物が黄色の固体(5.89g、HPLCによると88%純粋、70%収率)として得られた; Rt 2.21分; m/z 393(M+H)+(ES+)。この材料を、それ以上精製することなく、後の工程で使用した。
(方法1: 2-アミノニコチン酸(VI)を用いたアニリン(IXa)のアシル化)
N-(2-フルオロ-6-メチルフェニル)-6-(4-ニトロベンゾイル)-5,6-ジヒドロ-4H-ベンゾ[b]チエノ[2,3-d]アゼピン-2-カルボキサミド(5.00g、9.97mmol)のEtOH(100mL)溶液に、塩化アンモニウム(5.33g、100mmol)、水(20mL)、その後、鉄粉(2.78g、49.8mmol)を添加した。得られた混合物を還流状態で1時間撹拌し、その後、セライトに通して濾過した。このセライトパッドをEtOH(50mL)で洗浄し、合わせた濾液を真空中で蒸発させた。得られた残渣をEtOAc(200mL)中に取り、水(2×100mL)で洗浄し、その後、乾燥させ、真空中で蒸発させた。この手順を、追加のN-(2-フルオロ-6-メチルフェニル)-6-(4-ニトロベンゾイル)-5,6-ジヒドロ-4H-ベンゾ[b]チエノ[2,3-d]アゼピン-2-カルボキサミド(15.0g、29.9mmol)を用いて3回繰り返し、得られた固体を合わせ、Et2O(200mL)でトリチュレーションすると、表題化合物が淡黄色の固体(41.1g、87%収率)として得られた; Rt 2.12分; m/z 472(M+H)+(ES+);
N-(2-フルオロ-6-メチルフェニル)-6-(4-ニトロベンゾイル)-5,6-ジヒドロ-4Hベンゾ[b]チエノ[2,3-d]アゼピン-2-カルボキサミド(100mg、0.199mmol)のTHF(4.0mL)溶液に、5%Pd/Cペースト(58wt%水、21.0mg、0.100mmol)を添加し、混合物を5バールの水素下で18時間撹拌した。反応終了時に、混合物をAgilent 0.45μmシリンジフィルターに通し、濾液を真空中で蒸発させると、表題化合物(91.0mg、97%収率)が得られた; Rt 2.13分; m/z 472(M+H)+(ES+)。
(経路1: チオフェンカルボン酸(II)と2-フルオロ-6-メチルアニリンのアミドカップリング)
経路2について上で記載された合成法を利用して、本発明の化合物を>0.5kgのスケールで調製するのに成功した。この作戦に関する分析法及び分光法を以下に記載する。
(LCMS分析のための逆相HPLC条件:)
CORTECS C18+ 4.6×150mmカラム; 2.7μm(例えば、Waters #186007408)、40℃;流量1.0mL.分-1、0.1%ギ酸を含む精製H2O-MeCN勾配で25分かけて溶出させ、310nmでのUV検出を利用する。注入容量5μL。勾配情報: 0〜15分、95%H2O-5%MeCNから5%H2O-95%MeCNに上昇させる; 15〜25分、5%H2O-95%MeCNで保持する。
スペクトルは、JOEL ECX 400 MHzスペクトロメーターを用いて獲得した。残存する非重水素化溶媒を参照として用い、サンプルをDMSO-d6中で測定した。
(HEp2細胞におけるRSV誘導性CPEの評価)
感染1日前に、HEp2細胞を、2mM L-グルタミン及び1mMピルビン酸ナトリウムを含む5%無血清DMEMに入れて、384ウェルプレート(カタログ番号353962, BD Falcon, Oxford, UK)に播種した(103個/ウェル/50μL)。RSV A2株(#0709161v, NCPV, Public Health England, Wiltshire)又はRSV Bワシントン株(VR-1580, ATCC, Manassas, VA 20108)ウイルス溶液を、2mM L-グルタミン及び1mMピルビン酸ナトリウムを含む無血清DMEM中で調製し、その後、1 MOIの最終ウイルス濃度を達成するように添加した(50μL/ウェル)。同時に、化合物(I)(0.5μL DMSO溶液)をウイルス溶液とともに100μLのHEp2細胞培養物に添加して、0.5%の最終DMSO溶液を提供した。プレートを、RSV A2株を用いる試験については5日間又はRSV B株を用いる試験については6日間、インキュベートし(37℃/5%CO2)、その後、レサズリンナトリウム塩(5μLの0.03%溶液; Sigma-Aldrich, Dorset, UK)を各ウェルに添加し、プレートをさらに6時間インキュベートした(37℃/5%CO2)。各ウェルの蛍光[545nm(励起)/590nm(放出)]を、マルチスキャナー(Clariostar: BMG, Buckinghamshire, UK)を用いて決定した。各ウェルについての阻害率を計算し、IC50、IC75、及びIC90値を、化合物(I)について作成された濃度-応答曲線から計算した。
RSVによる上皮細胞の感染の後に起こる初期事象は、細胞の表面でのRSV F-タンパク質の発現である。BEAS2B細胞(SV40-不死化ヒト気管支上皮細胞株)を96ウェルプレートで増殖させた。ひとたび70%コンフルエントを上回れば、細胞を、2%FBS(Life technologies, Paisley, UK)を含む清澄なRPMI-1640培地(Life technologies, Paisley, UK)中で、0.01のMOIで、RSV A2(#0709161v, NCPV, Public Health England, Wiltshire)に感染させ、3日間インキュベートした(37℃/5%CO2)。
実験1日前に、HEp2細胞を、FBS DMEM(5%、2mM L-グルタミン及び1mMピルビン酸ナトリウムを含む)に入れて、384ウェルプレート(103個/ウェル/50μL; BD Falcon Ref 353962)に播種した。無血清DMEM(50μL)を試験ウェルに添加し、一方、対照ウェルについては、培地を除去し、滅菌水(100μL)を添加した。化合物(I)(0.5μLのDMSO溶液)を添加して、0.5%の最終DMSO濃度を生じさせた。Hep2細胞を各試験化合物とともに5日間インキュベートし(5%FBS中、37℃/5%CO2)、その後、レサズリンストック溶液(5μL; 0.03%)を各ウェルに添加し、プレートをさらに6時間インキュベートした(37℃/5%CO2)。545nm(励起)及び590nm(放出)での各ウェルの蛍光を、マルチスキャナー(Clariostar: BMG Labtech)を用いて決定した。細胞生存の損失率を、各ウェルについて、ビヒクル(0.5%DMSO)処理と比べて計算した。
ALI培養ヒト気管支上皮細胞をEpithelix Sarl(Geneva, Switzerland)から調達し、頂端表面をPBSで週1回洗浄しながら、基本培地を3〜4日毎に交換することにより維持した。0日目に、各ウェルの頂端表面を滅菌PBS(300μL)で1回洗浄し、インサートを、新鮮なMucilAir培養培地(780μL; EP04MM)を含む新しい24ウェルプレートに移した。RSV A2(50μL; 0.01の最終MOIになるようにMucilAir培養培地に希釈した)を細胞に1時間添加した(37℃/5%CO2)。MOIの計算を標準化するために、各MucilAirインサートを1ウェル当たり2×105個の頂端向き細胞を含むと推定した。ウイルス接種原をピペットで除去し、インサートを滅菌PBS(300μL)で2回洗浄した。
非絶食マウス(雄BALB/C、20〜30g)に、イソフルラン(O2中5%)麻酔下、RSV A2又はウイルス希釈液(DMEM、2%FBS、12.5%スクロース)を鼻腔内感染させた。A2株のRSV(50uLの1.3×106PFU/mL:最終0.65×105PFU/マウス)を、50μLの容量が送達されるまで、2つの鼻孔の間を交互に1滴ずつの形で、各鼻孔に注入した。感染後、各動物を毎日計量して、変化をモニタリングした。化合物(I)を100%DMSOに(20mg/mL及び/又は2mg/mLで)溶解させ、その後、等張生理食塩水に1:10で希釈して、全ての処理において10%DMSOを達成した。その後、製剤を超音波処理して、懸濁液を生じさせた。この懸濁液を、感染1日前及び感染1時間前(0日目)、その後、感染後1日目、2日目、及び3日目に、FMJ-250 PennCentury装置で気管内に(20μL)又はピペットで鼻腔内に(40μL)投与した。RSV攻撃から4日後、動物を(ペントバルビトン過剰用量の腹腔内注射によって)安楽死させ、気管にカニューレを挿入し、全細胞数及び細胞百分率数の計算のために、BALFを抽出した。BALF回収後、右肺を各動物から摘出し、2×20秒のバーストの間、(1%BSA及び25%スクロースを含む肺重量の10倍のDMEMを用いて)、氷冷したダルベッコの改変イーグル培地中でホモジナイズした。その後、ホモジネートを滅菌チューブに移し、4℃でスピンした(2000rpm; 5分間)。透明になったホモジネートを冷えたクライオバイアルに移し、瞬間凍結させ、-80℃で保存した。肺ホモジネートからの上清をプラークアッセイに使用した。
6〜8週齢の雄のシグモドン・ヒスピズス(Sigmodon hispidus)コットンラットを、0.1mLの容量のスクロース安定化培地中のhRSV/A/Long(ATCC, Manassas, VA; 105pfu)に感染させた。化合物(I)を100%DMSOに(3.3、10、33、及び100mg/mLで)溶解させ、その後、等張生理食塩水に1:10で希釈して、全ての処理において10%DMSOを達成した。その後、製剤を超音波処理して、懸濁液を生じさせた。得られた懸濁液を、感染4時間前(0日目)、その後、感染後1日目、2日目、及び3日目に、ピペットにより鼻腔内投与した(50μL)。RSV攻撃から4日後、動物を安楽死させ、肺を摘出した。左葉をプラークアッセイによるウイルス力価測定に使用し、舌葉をRSV/A/Long NS-1 qRT-PCR及びサイトカインqRT-PCRに使用した。
本明細書に開示される化合物(I)のプロファイルが以下にまとめられており(表A)、これは、HEp2細胞におけるRSV A2誘導性CPEとRSV B誘導性CPEの両方に対する強力な阻害活性を示している。さらに、本発明の化合物は、BEAS2B気管支上皮細胞におけるRSV A2 F-タンパク質発現の強力な阻害を示している。化合物(I)とのインキュベーションに起因する細胞生存に対する効果は全く検出されなかった。
表A HEp2細胞におけるRSV A2誘導性及びRSV B誘導性CPEに対する、BEAS2B気管支上皮細胞におけるRSV A2 F-タンパク質発現に対する、及び細胞生存に対する化合物(I)による処理の効果。
表B: RSV A2に感染させられ、気液界面で培養された気管支上皮細胞由来の頂端洗浄液中のRSV A2ウイルス力価に対する化合物(I)による早期介入(0〜7日)の効果。
表C: RSV A2に感染させられ、気液界面で培養された気管支上皮細胞由来の頂端洗浄液中のRSV A2ウイルス力価に対する化合物(I)による後期介入(3〜7日)の効果。
ヒトRSVは、前臨床スクリーニングに使用されるいくつかの動物種で感染及び複製することができ、それにより、新規の抗感染剤の性能及びプロファイルをインビボで評価及び比較することが可能になる(Bemらの文献、2011)。霊長類種を感染させ、試験することもできるが、この種の仕事はほとんど、マウス又はコットンラットで実施される。標準的な近交系マウス系統とコットンラットはどちらも、ヒトRSVの複製に対して「半許容性」として特徴付けられるが、顕著により大きいウイルス複製は、近交系マウス系統と比較してコットンラットで見られる。それゆえ、化合物(I)を上述のインビボ系で試験した。
表D: RSV A2感染マウス由来の肺におけるRSV A2ウイルス力価に対する化合物(I)による鼻腔内処理の効果。
表E: RSV A2感染マウス由来の肺におけるRSV A2ウイルス力価に対する化合物(I)による気管内処理の効果。
表F: RSV A2感染コットンラット由来の肺におけるRSV A2ウイルス力価に対する化合物(I)による鼻腔内処理の効果。
表G: RSV A2感染コットンラット由来の肺におけるRSV A2 NS-1遺伝子発現に対する化合物(I)による鼻腔内処理の効果。
表H: RSV A2感染コットンラット由来の肺におけるRANTES遺伝子発現に対する化合物(I)による鼻腔内処理の効果。
本発明の化合物のインビトロ抗ウイルス活性が、RSVに感染したHEp2細胞に対するその細胞保護効果によって示されている。このアッセイ系では、ウイルス複製の阻害を、結果として生じたウイルス媒介CPEの阻害から検出及び定量した。化合物(I)が、試験されたRSV A株とRSV B株の両方によって誘導されるCPEの強力な阻害剤であることは特に注目すべきである。化合物(I)の強力な抗ウイルス活性はさらに、BEAS2B細胞におけるそのRSV A2 F-タンパク質発現の阻害からも明らかであった。
Claims (22)
- 医薬としての使用のための、請求項1記載の化合物。
- RSV感染の治療における及びRSV感染と関連する疾患の予防のための使用のための、請求項1記載の化合物。
- RSV感染の治療のための及びRSV感染と関連する疾患の予防又は治療のための薬剤の製造のための、請求項1記載の化合物の使用。
- RSVに感染した対象の治療方法であって、該対象に、請求項1記載の化合物の有効量を投与することを含む、前記方法。
- 対象におけるRSV感染と関連する疾患の予防又は治療方法であって、感染前の該対象に、請求項1記載の化合物の有効量を投与することを含む、前記方法。
- 対象におけるRSV感染と関連する疾患の予防方法であって、感染前の該対象に、請求項1記載の化合物の有効量を投与することを含む、前記方法。
- 前記RSV感染が、RSV A株のウイルス及び/又はRSV B株のウイルスによる感染である、請求項3〜7のいずれか一項記載の、使用のための化合物、使用、又は方法。
- 第2の又はさらなる活性成分と組み合わせた医薬としての使用のための、請求項1記載の化合物。
- 請求項1記載の化合物を、任意に1以上の医薬として許容し得る希釈剤又は担体と組み合わせて含む、医薬組成物。
- 水性媒体に懸濁した微粒子形態の式(I)の化合物を含む、請求項10記載の医薬組成物。
- 第2の又はさらなる活性成分を含む、請求項10記載の医薬組成物。
- 前記第2の又はさらなる活性成分が、Fタンパク質阻害剤(抗Fタンパク質抗体、例えば、パリビズマブを含む)、RNAポリメラーゼ阻害剤、及びリバビリンを含む抗ウイルス剤(例えば、他の抗RSV剤)、並びに抗炎症剤から選択される、請求項9記載の使用のための化合物又は請求項12記載の医薬組成物。
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AU2016297024B2 (en) | 2015-07-22 | 2021-03-04 | Enanta Pharmaceuticals, Inc. | Benzodiazepine derivatives as RSV inhibitors |
EP3402799B1 (en) | 2016-01-15 | 2022-05-04 | Enanta Pharmaceuticals, Inc. | Heterocyclic compounds as rsv inhibitors |
KR20180108598A (ko) * | 2016-02-03 | 2018-10-04 | 얀센 사이언시즈 아일랜드 유씨 | Rsv의 치료를 위한 조합 생성물 |
WO2017175000A1 (en) * | 2016-04-08 | 2017-10-12 | Pulmocide Limited | Compounds |
US10398706B2 (en) | 2017-01-06 | 2019-09-03 | Enanta Pharmaceuticals, Inc. | Heteroaryldiazepine derivatives as RSV inhibitors |
EP3582784B1 (en) | 2017-02-16 | 2022-06-08 | Enanta Pharmaceuticals, Inc. | Processes for the preparation of benzodiazepine derivatives |
WO2018226801A1 (en) | 2017-06-07 | 2018-12-13 | Enanta Pharmaceuticals, Inc. | Aryldiazepine derivatives as rsv inhibitors |
WO2019006291A1 (en) * | 2017-06-30 | 2019-01-03 | Enanta Pharmaceuticals, Inc. | HETEROCYCLIC COMPOUNDS AS RSV INHIBITORS |
WO2019006295A1 (en) * | 2017-06-30 | 2019-01-03 | Enanta Pharmaceuticals, Inc. | HETEROCYCLIC COMPOUNDS AS RSV INHIBITORS |
WO2019067864A1 (en) | 2017-09-29 | 2019-04-04 | Enanta Pharmaceuticals, Inc. | PHARMACEUTICAL AGENTS IN COMBINATION AS INHIBITORS OF RSV |
CA3080138A1 (en) | 2017-11-13 | 2019-05-16 | Enanta Pharmaceuticals, Inc. | Processes for the resolution of benzodiazepin-2-one and benzoazepin-2-one derivatives |
WO2019094920A1 (en) | 2017-11-13 | 2019-05-16 | Enanta Pharmaceuticals, Inc. | Azepin-2-one derivatives as rsv inhibitors |
WO2019199908A1 (en) * | 2018-04-11 | 2019-10-17 | Enanta Pharmaceuticals, Inc. | Heterocyclic compounds as rsv inhibitors |
MX2021011144A (es) | 2019-03-18 | 2022-01-18 | Enanta Pharm Inc | Derivados de las benzodiazepinas como inhibidores del vsr. |
WO2020210246A1 (en) * | 2019-04-09 | 2020-10-15 | Enanta Pharmaceuticals, Inc, | Heterocyclic compounds as rsv inhibitors |
MX2022003984A (es) | 2019-10-04 | 2022-07-27 | Enanta Pharm Inc | Compuestos heterociclicos antivirales. |
US11505558B1 (en) | 2019-10-04 | 2022-11-22 | Enanta Pharmaceuticals, Inc. | Antiviral heterocyclic compounds |
UY39032A (es) | 2020-01-24 | 2021-07-30 | Enanta Pharm Inc | Compuestos heterocíclicos como agentes antivirales |
US11534439B2 (en) | 2020-07-07 | 2022-12-27 | Enanta Pharmaceuticals, Inc. | Dihydroquinoxaline and dihydropyridopyrazine derivatives as RSV inhibitors |
US11945824B2 (en) | 2020-10-19 | 2024-04-02 | Enanta Pharmaceuticals, Inc. | Heterocyclic compounds as anti-viral agents |
US11945830B2 (en) | 2021-02-26 | 2024-04-02 | Enanta Pharmaceuticals, Inc. | Antiviral heterocyclic compounds |
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