JP7076433B2 - 新規細胞傷害性剤およびそのコンジュゲート - Google Patents
新規細胞傷害性剤およびそのコンジュゲート Download PDFInfo
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- JP7076433B2 JP7076433B2 JP2019514273A JP2019514273A JP7076433B2 JP 7076433 B2 JP7076433 B2 JP 7076433B2 JP 2019514273 A JP2019514273 A JP 2019514273A JP 2019514273 A JP2019514273 A JP 2019514273A JP 7076433 B2 JP7076433 B2 JP 7076433B2
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- 229940053867 xeloda Drugs 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- DGVVWUTYPXICAM-UHFFFAOYSA-N β‐Mercaptoethanol Chemical compound OCCS DGVVWUTYPXICAM-UHFFFAOYSA-N 0.000 description 1
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Description
今回、ある特定の新規メイタンシノイド化合物が改善された細胞傷害活性を有し、結合タンパク質とのコンジュゲートへの包含に特に適していることを我々は見出した。メイタンシノイドはさらに、比較化合物と比較して改善された安定性を有する。我々はまた、これらの新規化合物の効率的な調製を可能にする新規合成方法、ならびに他のメイタンシノイドの新規の改善された合成方法も見出した。
本発明の化合物は一般式(I)のものである。本発明の化合物は、予想外の生物学的活性を有する新しいクラスのビフェニル含有化合物である。本発明の化合物はまた、新しい抗体-薬物コンジュゲートおよびコンジュゲート試薬の産生において有用性を見出す。
本発明の化合物の重要な特徴は、メイタンシンコア構造に存在するフェニル基が基Rで置換されているさらなるフェニル基を担持し、この基Rが化合物を結合タンパク質にコンジュゲートするために使用され得ることである。メイタンシンのコア構造は、塩素原子を担持するフェニル基を含有する。本発明者らは、この塩素原子を置換して本発明のフェニル含有化合物を産生する新規方法を発見した。したがって、本発明はまた、以下の一般式:
これらの保護された化合物は、保護基の除去により一般式(I)、(I’)、(Ia)、(Ib)、もしくは(Ic)の対応する化合物、またはそれらの塩に変換され、そのため、保護された化合物は、一般式(I)、(I’)、(Ia)、(Ib)、もしくは(Ic)の化合物、またはそれらの塩の調製のための中間体として有用である。それら自体が生物学的活性を有すると期待されるこれらの保護された化合物は新規であり、本発明のさらなる態様を形成する。保護基が上述のもののうちの1つである化合物が特に好ましい。
本発明のコンジュゲートおよび試薬は、式(I)、(I’)、(Ia)、(Ib)、もしくは(Ic)の基Rを介して、式(I)、(I’)、(Ia)、(Ib)、もしくは(Ic)の化合物、またはそれらの塩(本明細書中でペイロードもしくは薬物Dと称される)を、本発明のコンジュゲート中の結合タンパク質または本発明のコンジュゲート試薬中の官能基に接続するリンカーを含有する。コンジュゲートおよび試薬は、それぞれ、以下によって概略的に表すことができ、
D~リンカー~F’または
D~リンカー~F
式中、Dは薬物であり、Fは試薬の官能基であり、これは結合タンパク質との反応時に、コンジュゲートに存在する結合タンパク質を含む基F’を生じさせる。
この種類の官能基は、例えば、結合タンパク質に存在する求核性アミン基とのアミド化反応により、結合タンパク質にコンジュゲートするために使用することができる。
~W-CR15R15’-CR15.L.L’(VIII)
式中、Wは、上記の意味および好ましい意味を有し、
各R15は水素原子またはC1-4アルキル基を表すか、R15’は水素原子を表すかのいずれかであり、各LおよびL’は、独立して、脱離基を表すか、またはLおよびL’の両方が一緒になって脱離基を表すか、あるいは
各R15は水素原子またはC1-4アルキル基を表し、Lは脱離基を表し、R15’およびL’は一緒になって結合を表すかのいずれかである。
~W-(CH=CH)p-(CH2)2-L(IX)または
~W-(CH=CH)p-CH=CH2(X)
式中、Wは上記の意味および好ましい意味を有し、pは、0または1~4の整数、好ましくは0を表す。この種類の特に好ましい試薬は、以下の官能基を含み、
-NH-CO-Ar’-CO-(CH2)2-L(IXa)または
~NH-CO-Ar’-CO-CH=CH2(Xa)
式中、Ar’は、任意選択で置換アリール、特にフェニル基を表す。
ペイロードを、一般式(I)、(I’)、(Ia)、(Ib)、または(Ic)の基Rを介して本発明によるコンジュゲート中の結合タンパク質、または本発明によるコンジュゲート試薬中の結合タンパク質と反応可能な官能基に接続するリンカーは、任意の所望の基、例えば、この分野で一般的に見られる従来の基のいずれかを含有し得る。
一実施形態では、ペイロードと式F’/Fの基との間のリンカー、特に式(V)、(VI)、(VII)、(VIII)、(IX)、および(X)のコンジュゲートまたは試薬中の式F’/Fの基に直ぐ隣接するリンカーのその部分は、アルキレン基(好ましくはC1-10アルキレン基)、または任意選択で置換されているアリールもしくはヘテロアリール基を含み得、そのうちのいずれかは、1個以上の酸素原子、硫黄原子、-NRaa基(式中、Raaは、水素原子またはアルキル(好ましくはC1-6アルキル)、アリール(好ましくはフェニル)、またはアルキル-アリール(好ましくはC1-6アルキル-フェニル)基である)、ケト基、-O-CO-基、-CO-O-基、-O-CO-O、-O-CO-NRaa-、-NR-CO-O-、-CO-NRaa-、および/または-NRaa.CO-基で終結されるか、または中断されてもよい。好適なアリール基は、フェニルおよびナフチル基を含み、一方好適なヘテロアリール基は、ピリジン、ピロール、フラン、ピラン、イミダゾール、ピラゾール、オキサゾール、ピリダジン、ピリミジン、およびプリンを含む。基F/F’に直ぐ隣接するリンカーのその部分として特に好ましいのは、アリール基、特にフェニル基である。基F/F’に直ぐ隣接するリンカーのその部分としてさらに特に好ましいのは、ヘテロアリール基、例えば上述のもののうちの1つである。
-CO-NH-Het-F’、-CO-NH-Het-F、-NH-CO-Het-F’、および-NH-CO-Het-F(式中、Hetは、ヘテロアリール基、例えば、上述のもののうちの1つを表す)のコンジュゲートおよびコンジュゲート試薬も好適である。
一実施形態では、リンカーは、分解性基を含有し得る、すなわち、それは生理学的条件下で分解し、結合しているかまたは結合するであろうタンパク質からペイロードを分離する基を含有し得る。あるいは、それは生理学的条件下で切断可能ではないリンカーであり得る。リンカーが生理学的条件下で切断する場合、それは細胞内条件下で切断可能であることが好ましい。標的が細胞内である場合、好ましくは、リンカーは、細胞外条件に対して実質的に非感受性である(すなわち、十分な用量の治療薬の細胞内標的への送達が禁止されないように)。
本発明の試薬およびコンジュゲートのリンカーは、所望する場合、オリゴマーまたはポリマー(本明細書では便宜上一緒に「ポリマー」と呼ばれる)を含有し得る。ポリマーは、例えば、ポリアルキレングリコール、ポリビニルピロリドン、ポリアクリレート、例えばポリアクリロイルモルホリン、ポリメタクリレート、ポリオキサゾリン、ポリビニルアルコール、ポリアクリルアミド、またはポリメタクリルアミド、例えばポリカルボキシメタクリルアミド、またはHPMAコポリマーであり得る。さらに、ポリマーは、酵素分解または加水分解的分解を受けやすいポリマーであり得る。そのようなポリマーは、例えば、ポリエステル、ポリアセタール、ポリ(オルトエステル)、ポリカーボネート、ポリ(イミノカーボネート)、およびポリアミド、例えば、ポリ(アミノ酸)を含む。ポリマーは、ホモポリマー、ランダムコポリマー、またはブロックコポリマーなどの構造的に定義されたコポリマーであり得、例えば、それは2つ以上のアルキレンオキシド、またはポリ(アルキレンオキシド)およびポリエステル、ポリアセタール、ポリ(オルトエステル)、またはポリ(アミノ酸)のいずれかから誘導されるブロックコポリマーであり得る。使用され得る多官能性ポリマーとしては、ジビニルエーテル-無水マレイン酸およびスチレン-無水マレイン酸のコポリマーを挙げることができる。
Fは、結合タンパク質と反応可能な官能基、例えば、
またはFは、
F’は、官能基の残基を介してコンジュゲートの残りの部分に結合したタンパク質またはペプチドを表す。
PEGは、ポリエチレングリコール含有基を表し、
Fは、結合タンパク質と反応可能な官能基、例えば、
またはFは、
F’は、官能基の残基を介してコンジュゲートの残りの部分に結合しているタンパク質またはペプチドを表す。
コンジュゲートは、リンカーのタンパク質またはペプチド結合部分とタンパク質またはペプチドとの反応から生じる対応する構造を有し得る。
PEGは、式-CH2CH2ORrの末端基を有するペンダントポリエチレングリコール鎖(式中、Rrは、水素原子、アルキル基、例えばC1-4アルキル基、特にメチル基、または任意選択で置換されているアリール基、特にフェニル基、特に非置換フェニル基を表す)を表し、
Fは、結合タンパク質と反応可能な官能基、例えば、
またはFは、
F’は、官能基の残基を介してコンジュゲートの残りの部分に結合しているタンパク質またはペプチドを表す。
コンジュゲートは、リンカーのタンパク質またはペプチド結合部分とタンパク質またはペプチドとの反応から生じる対応する構造を有し得る。
Fは、結合タンパク質と反応可能な官能基、例えば、
またはFは、
F’は、官能基の残基を介してコンジュゲートの残りの部分に結合したタンパク質またはペプチドを表す。
例えば、Sub基のフェニル環上のある特定のオルト置換基の存在により結合したビアリールの周りの束縛回転により、単離可能なアトロプ異性体が産生される場合、本発明はそれら個々のアトロプ異性体も含む。例えば、Subが
本発明の化合物はまた、下記の例示化合物も含む。
本発明による化合物およびコンジュゲートは、薬学的に許容される担体と一緒に、任意選択で治療に使用するための、具体的には増殖性、自己免疫性、または感染性の疾患の治療のための薬剤として使用するための追加の治療薬と一緒に医薬組成物に製剤化することができる。患者を治療する方法は、薬学的有効量のそのような化合物、コンジュゲート、または組成物を、治療を必要とする患者に投与することを含む。患者は、動物、具体的には哺乳動物、より具体的にはヒトであり得る。本発明が有用性を見出す例示的な状態には、例えば、癌、例えば、非ホジキンリンパ腫、急性骨髄性白血病、多発性骨髄腫、リンパ球性白血病、および慢性骨髄性白血病を含む白血病;胃癌;乳癌;卵巣癌;肝臓癌;腸癌;結腸癌;腎臓癌、例えば腎細胞癌;肺癌、例えば小細胞肺癌;黒色腫;膀胱癌;ならびに肉腫が含まれる。
1.一般式(I)の化合物またはその塩であって、
~W’-(CH=CH)p-(CH2)2-Nu-Pr
式中、W’が、電子求引性基または電子求引性基の還元により得られる基を表し、pが、0または1~4の整数であり、Prが求核剤Nuを介して分子の残りの部分に結合した前記結合タンパク質を表す、部分を含む、項11~13のいずれか一項に定義されるコンジュゲート。
~NH-CO-Ar’-CO-(CH2)2-Nu-Pr
式中、Ar’が、任意選択で置換されているアリール基を表す、部分を含む、項14に定義されるコンジュゲート。
~W-(CH=CH)p-(CH2)2-Lもしくは~W-(CH=CH)p-CH=CH2
(式中、Wは電子求引性基を表し、pは0または1~4の整数を表し、Lは脱離基を表す)を有する、項20に定義されるコンジュゲート試薬。
式中、Ar’が、任意選択で置換されているアリール基を表す、項21に定義されるコンジュゲート試薬。
1H NMRスペクトルは、適切なNMR機器(例えば、Varian Inova 500MHz NMR機器)を使用して記録した。クロマトグラフィー純度はLC/MS(例えばAgilent 1200シリーズLC/MSシステム)を使用して決定した。
インビトロで細胞傷害性薬またはADCで処理した後の腫瘍細胞の生存の消失は、増加濃度の薬物またはADCの存在下で細胞株を成長させ、CellTiter-Glo(登録商標)Luminescence試薬(Promega)を使用して増殖または代謝活性の消失を定量することによって測定することができる。プロトコルは、ウェルに存在する細胞の数に直接関係する、ATP合成に基づく未処理細胞に関する細胞播種、薬物処理、および細胞の生存の決定を記載する。
アセトニトリル:水(1.8mL、5:4v/v)中の化合物8(22mg)およびトリス(2-カルボキシエチル)ホスフィン塩酸塩(TCEP.HCl、67mg)の溶液に、7~8のpHが達成されるまで飽和炭酸水素ナトリウム溶液(1.2mL)をゆっくり添加した。次いで、反応混合物を室温で2時間撹拌した後、溶液を真空中で濃縮し、残渣をアセトニトリル(50mL)に溶解した。次いで、アセトニトリル溶液を鹹水(20mL)で洗浄し、層を分離し、有機層を真空中で濃縮した。次いで、残渣を、緩衝液A(v/v):水:0.1%酢酸および緩衝液B(v/v):アセトニトリル:0.1%酢酸(100:0v/vから0:100v/v)で溶出する逆相C-18カラムクロマトグラフィーにより精製し、所望の画分を凍結乾燥して化合物6を白色の個体(14mg)として得た。1H NMR(500MHz;CDCl3)δ7.58-7.57(m,1H),7.51-7.47(m,1H),7.09(d,J=8.2Hz,2H),6.89(d,J=9.0Hz,2H),6.51(dd,J=15.4,11.1Hz,1H),6.24(s,1H),6.22-6.20(m,1H),5.49(dd,J=15.3,9.0Hz,1H),4.85(dd,J=12.0,2.8Hz,1H),4.34-4.29(m,1H),3.83(s,3H),3.58(d,J=12.9Hz,1H),3.54(d,J=8.9Hz,1H),3.39(s,3H),3.28(d,J=12.8Hz,1H),3.07-2.96(m,4H),2.69(s,3H),2.66-2.62(m,1H),2.61-2.53(m,2H),2.27-2.24(m,1H),2.19-2.13(m,1H),1.86-1.80(m,1H),1.77(s,3H),1.70(d,J=13.5Hz,1H),1.54-1.48(m,2H),1.43(d,J=6.7Hz,3H),1.32(d,J=6.3Hz,3H),1.28(d,J=7.2Hz,3H),1.27-1.26(m,1H),1.22(d,J=6.7Hz,3H),0.96(s,3H)。LC/MS:(ES+)[M+H]+(808,100%)。
化合物8の代わりに化合物11を使用して、実施例5の化合物6と同様の方法で化合物9を合成した。化合物9を白色の固体として単離した。1H NMR(500MHz;CDCl3)1H NMR(500MHz;CDCl3)δ7.56-7.54(m,2H),7.34(s,1H),7.08-7.07(m,2H),6.86(d,J=9.8Hz,2H),6.51-6.46(m,1H),6.21-6.18(m,2H),5.49-5.44(m,1H),4.85-4.82(m,1H),4.32-4.27(m,1H),3.81(s,3H),3.56(d,J=12.7Hz,1H),3.52(d,J=9.0Hz,1H),3.37(s,3H),3.26(d,J=13.6Hz,1H),3.01-2.94(m,3H),2.67(s,3H),2.64-2.61(m,1H),2.59-2.56(m,2H),2.25-2.22(m,1H),2.04-2.01(m,2H),1.75(s,3H),1.69-1.67(m,1H),1.52-1.48(m,1H),1.43(s,6H),1.30(d,J=6.3Hz,3H),1.26(d,J=7.1Hz,3H),1.25-1.23(m,1H),1.20(d,J=6.7Hz,3H),0.94(s,3H)。LC/MS:(ES+)[M+H]+(822,100%)。
化合物8の代わりに化合物14を使用して、実施例5の化合物6と同様の方法で化合物12を合成した。化合物12を白色の固体として単離した。1H NMR(500MHz;CDCl3)δ7.56-7.54(m,1H),7.49(d,J=3.9Hz,1H),7.08-7.07(m,2H),6.86(d,J=8.8Hz,2H),6.49(dd,J=15.3,11.0Hz,1H),6.21-6.18(m,2H),5.47(dd,J=15.3,9.0Hz,1H),4.84-4.81(m,1H),4.32-4.27(m,1H),3.81(s,3H),3.56(d,J=13.0Hz,1H),3.52(d,J=9.0Hz,1H),3.37(s,3H),3.28-3.25(m,1H),3.04-2.95(m,3H),2.67(s,3H),2.65-2.61(m,2H),2.53(t,J=7.2Hz,2H),2.26-2.22(m,1H),2.07-2.02(m,2H),1.75(s,3H),1.69(d,J=0.4Hz,1H),1.54-1.48(m,1H),1.38(t,J=8.0Hz,1H),1.30(d,J=6.3Hz,3H),1.26(d,J=7.2Hz,3H),1.25-1.24(m,1H),1.20(d,J=6.7Hz,3H),0.94(s,3H)。LC/MS:(ES+)[M+H]+(794,100%)。
化合物8の代わりに化合物17を使用して、実施例5の化合物6と同様の方法で化合物15を合成した。化合物15を白色の固体として単離した。1H NMR(500MHz;CDCl3)δ7.63(s,1H),7.57-7.55(m,1H),7.09-7.07(m,2H),6.87(d,J=8.2Hz,2H),6.49(dd,J=15.3,11.1Hz,1H),6.22-6.18(m,2H),5.47(dd,J=15.3,9.1Hz,1H),4.85-4.82(m,1H),4.32-4.27(m,1H),3.82(s,3H),3.57(d,J=13.0Hz,1H),3.52(d,J=8.9Hz,1H),3.37(s,3H),3.26(d,J=12.7Hz,1H),3.04-2.95(m,3H),2.90(q,J=7.4Hz,2H),2.70(dd,J=8.7,4.5Hz,2H),2.67(s,3H),2.64-2.60(m,1H),2.24(dd,J=13.9,2.6Hz,1H),1.75(s,3H),1.72(d,J=8.5Hz,1H),1.70-1.66(m,1H),1.54-1.48(m,1H),1.30(d,J=6.4Hz,3H),1.26(d,J=7.2Hz,3H),1.24-1.23(m,1H),1.20(d,J=6.8Hz,3H),0.94(s,3H)。LC/MS:(ES+)[M+H]+(780,100%)。
化合物8の代わりに化合物20を使用して、実施例5の化合物6と同様の方法で化合物18を合成した。1H NMR(500MHz;CDCl3):δ8.41(s,1H),7.70(s,1H),7.12(s,1H),7.04(d,J=6.8Hz,1H),6.88(s,1H),6.85(s,1H),6.48(dd,J=15.2,11.2Hz,1H),6.21-6.17(m,2H),5.47(dd,J=15.4,9.0Hz,1H),4.84-4.80(m,1H),4.30(t,J=11.0Hz,1H),3.82(s,3H),3.56(d,J=12.8Hz,1H),3.52(d,J=8.9Hz,1H),3.37(s,3H),3.27(d,J=12.7Hz,1H),2.99(t,J=8.4Hz,1H),2.92(t,J=12.8Hz,1H),2.73(s,3H),2.67-2.59(m,2H),2.22(d,J=13.9Hz,1H),2.08-2.04(m,1H),1.75(s,3H),1.67(d,J=14.3Hz,2H),1.50(d,J=6.6Hz,3H),1.36(d,J=6.8Hz,2H),1.30(t,J=6.6Hz,6H),1.20(d,J=6.6Hz,3H),0.94(s,3H),0.88(dd,J=11.6,5.5Hz,3H)。LC/MS:(ES+)[M+H]+(842,100%)。
化合物8の代わりに化合物22を使用して、実施例5の化合物6と同様の方法で化合物21を合成した。化合物21を白色の固体として単離した。1H NMR(500MHz;CDCl3)δ8.44-8.42(m,1H),7.69(d,J=0.3Hz,1H),7.12(d,J=0.6Hz,1H),7.06-7.04(m,1H),6.86(d,J=11.8Hz,2H),6.51-6.45(m,1H),6.22-6.17(m,2H),5.47(dd,J=15.4,9.0Hz,1H),4.84-4.82(m,1H),4.84-4.82(m,1H),4.32-4.27(m,1H),3.82(s,3H),3.56(d,J=13.0Hz,1H),3.52(d,J=9.0Hz,1H),3.37(s,3H),3.27(d,J=12.7Hz,1H),3.00(d,J=9.5Hz,2H),2.92(t,J=12.9Hz,1H),2.72(s,3H),2.66-2.60(m,3H),2.24-2.21(m,1H),2.04(dd,J=9.2,6.8Hz,2H),1.75(s,3H),1.67(d,J=11.3Hz,1H),1.54-1.48(m,1H),1.44(s,6H),1.31(d,J=6.3Hz,3H),1.25(s,3H),1.25-1.23(m,1H),1.20(d,J=6.7Hz,3H),0.94(s,3H)。LC/MS:(ES+)[M+H]+(856,100%)。
化合物8の代わりに化合物24を使用して、実施例5の化合物6と同様の方法で化合物23を合成した。化合物23を白色の固体として単離した。1H NMR(500MHz;CDCl3)1H NMR(500MHz;CDCl3)δ8.45-8.43(m,1H),7.75(s,1H),7.13(s,1H),7.06(d,J=8.2Hz,1H),6.88-6.85(m,2H),6.48(dd,J=15.4,11.0Hz,1H),6.21-6.17(m,2H),5.47(dd,J=15.5,9.0Hz,1H),4.83(dd,J=11.8,2.9Hz,1H),4.32-4.27(m,1H),3.82(s,3H),3.56(d,J=12.9Hz,1H),3.52(d,J=8.9Hz,1H),3.37(s,3H),3.27(d,J=12.8Hz,1H),3.02-2.99(m,2H),2.94-2.90(m,3H),2.78(t,J=6.5Hz,2H),2.73(s,3H),2.65-2.60(m,1H),2.23(dd,J=13.7,2.8Hz,1H),1.74(s,3H),1.67(d,J=13.1Hz,1H),1.53-1.47(m,1H),1.31(d,J=6.3Hz,3H),1.26(d,J=7.2Hz,3H),1.25-1.23(m,1H),1.20(d,J=6.7Hz,3H),0.94(s,3H)。LC/MS:(ES+)[M+H]+(814,100%)。
無水ジクロロメタン(2mL)中の化合物26(23mg)、N-(3-ジメチルアミノプロピル)-N’-エチルカルボジイミド塩酸塩(EDC.HCl、12mg)、およびN-ヒドロキシスクシンイミド(5mg)の混合物を室温で4時間撹拌した。次いで、反応混合物を真空中で濃縮し、残渣をDMSO(5mL)に溶解した後、緩衝液A(v/v):水:0.1%酢酸および緩衝液B(v/v):アセトニトリル:0.1%酢酸(100:0v/vから0:100v/v)で溶出する逆相C-18カラムクロマトグラフィーにより精製した。所望の画分を混合し、凍結乾燥して、試薬25を白色の固体(25mg)として得た。1H NMR(500MHz;CDCl3)δ7.75-7.69(m,1H),7.58-7.54(m,2H),7.08-7.06(m,2H),6.87-6.85(m,2H),6.48(dd,J=15.4,11.0Hz,1H),5.47(dd,J=15.4,9.0Hz,1H),4.84-4.81(m,1H),4.32-4.27(m,1H),3.81(s,3H),3.56(d,J=13.0Hz,1H),3.52(d,J=8.9Hz,1H),3.37(s,3H),3.26(d,J=13.0Hz,1H),3.01-2.84(m,6H),2.82(d,J=1.0Hz,3H),2.80-2.73(m,2H),2.67(s,3H),2.64-2.60(m,1H),2.53-2.50(m,2H),2.25-2.21(m,1H),2.15-2.11(m,1H),2.06-1.96(m,3H),1.75(s,3H),1.68(d,J=13.5Hz,1H),1.53-1.47(m,1H),1.37(d,J=6.8Hz,3H),1.34-1.30(m,6H),1.26(d,J=7.2Hz,3H),1.24-1.23(m,1H),1.20(d,J=6.8Hz,3H),0.94(s,3H)。LC/MS:(ES+)[M+H]+(1037,100%)。
化合物26の代わりに化合物28を使用して、実施例12の試薬25と同様の方法で試薬27を合成した。試薬27を白色の固体として単離した。1H NMR(500MHz;CDCl3)δ7.89(d,J=4.9Hz,1H),7.58-7.56(m,2H),7.07(d,J=8.1Hz,2H),6.86(d,J=6.4Hz,2H),6.48(dd,J=15.3,11.1Hz,1H),6.23(s,1H),6.18(d,J=10.9Hz,1H),5.47(dd,J=15.4,9.0Hz,1H),4.84-4.81(m,1H),4.32-4.27(m,1H),3.81(s,3H),3.56(d,J=12.9Hz,1H),3.52(d,J=9.0Hz,1H),3.37(s,3H),3.26(d,J=12.8Hz,1H),3.06(s,1H),3.00-2.94(m,2H),2.87-2.83(m,6H),2.77-2.71(m,2H),2.66(s,3H),2.64-2.60(m,1H),2.55-2.48(m,2H),2.24(d,J=13.4Hz,1H),2.09-1.96(m,4H),1.75(s,3H),1.68(d,J=13.5Hz,1H),1.54-1.46(m,1H),1.34(d,J=6.7Hz,3H),1.30-1.28(m,9H),1.25-1.24(m,1H),1.26(d,J=7.2Hz,3H),1.20(d,J=6.7Hz,3H),0.94(s,3H)。LC/MS:(ES+)[M+H]+(1051,100%)。
コンジュゲーション試薬25および27をトラスツズマブにコンジュゲートし、それぞれADC29および30を得た。簡単に説明すると、試薬をDMSOに溶解して10mMのストック溶液を得た。100mMリン酸ナトリウム緩衝液、100mM塩化ナトリウム、pH8.0中のトラスツズマブの溶液にプロピレングリコール(40%v/v)を添加し、溶液を穏やかに混合して4.8mg/mLの最終抗体濃度を得た。次いで、コンジュゲーション試薬(13当量/mAb)を抗体溶液に添加し、反応混合物を穏やかに混合し、24℃で3時間インキュベートした。次いで、活性炭粉末(70%w/wのmAb)を、室温で30分間穏やかに撹拌した反応溶液に添加して未反応の薬物関連種を除去した。次いで、反応混合物を濾過し(0.22μmのPES膜)、精製した試料をPD-10脱塩カラムを使用して10mMコハク酸、6%w/vトレハロース、0.01%v/v Tween20、pH5.5に緩衝液交換した。
本発明の化合物で処理した後の腫瘍細胞の生存の消失を、実施例2に記載のように、増加濃度の本発明の化合物の存在下でSK-BR-3細胞株を成長させ、増殖または代謝活性の消失を定量することによって試験した。本発明の化合物についての平均IC50値を表3に示し、アッセイ濃度を表4に特定する。Chem.Eur.J.2012,18,880-886からの以下の比較化合物31のIC50値
実施例14に記載したようにコンジュゲート29を調製した。到着時6週齢の健康な雌のNMRIヌードマウス(RjOrl:NMRI-Foxn1nu/Foxn1nu)を細胞接種に使用した。
化合物8の代わりに化合物34を使用して、実施例5の化合物6と同様の方法で化合物33を合成した。化合物33を白色の固体として単離した。1H NMR(500MHz;CDCl3)δ7.56-7.53(m,2H),7.28(dq,J=3.1,1.0Hz,1H),7.07-7.05(m,2H),6.83(s,1H),6.72-6.69(m,1H),6.67(d,J=0.3Hz,1H),6.48-6.42(m,1H),6.21(s,1H),5.71-5.66(m,1H),5.35-5.31(m,1H),4.82-4.79(m,1H),4.31-4.27(m,1H),3.80(s,3H),3.69(d,J=12.7Hz,1H),3.51(d,J=9.0Hz,1H),3.40-3.39(m,1H),3.36(s,3H),3.17-3.14(m,1H),3.07(d,J=9.8Hz,1H),3.03-2.98(m,2H),2.80(s,3H),2.65(s,3H),2.57-2.52(m,2H),2.26-2.23(m,1H),2.17-2.11(m,1H),2.06(s,3H),1.82-1.75(m,1H),1.68(s,3H),1.64-1.61(m,1H),1.46-1.44(m,1H),1.41-1.40(m,3H),1.31-1.29(m,6H),1.26-1.23(m,1H),0.91(s,3H)。LC/MS:(ES+)[M+H]+(865,100%)。
0℃に冷却した無水DMF(400μL)中の化合物38(25.3mg)の溶液に、HATU(5.7mg)を添加した。25分間撹拌した後、NMM(1.5μL)を添加し、溶液を15分間撹拌した後、室温に温め、さらに10分間撹拌した。無水DMF(300μL)中の化合物40(15mg)の別の溶液にNMM(1.5μL)を添加し、溶液を室温で10分間撹拌した。次いで、溶液を混合し、追加のHATU(5.7mg)およびNMM(0.8μL)を反応混合物に添加した。室温で1時間撹拌した後、反応混合物を真空中で濃縮し、緩衝液A(v/v):水:0.05%トリフルオロ酢酸および緩衝液B(v/v):アセトニトリル:0.05%トリフルオロ酢酸(95:5v/vから0:100v/v)で溶出する逆相C18カラムクロマトグラフィーにより精製した。有機溶媒を真空中で除去し、水性溶媒を凍結乾燥により除去して、試薬35を無色の固体(27.2mg)として得た。LC/MS:(ES+)[M+2Na]2+(1412Da,40%),[M+H+Na]2+(1401,50%),[M+2H+Na]3+(935,80%),[M-H2O+3H]3+(921,100%)。
0℃に冷却したDMF(300μL)中の化合物46(10.5mg)の溶液に、HATU(4mg)を添加した。20分間撹拌した後、NMM(1μL)を添加し、反応溶液を0℃でさらに30分間撹拌した。0℃に冷却したDMF(200μL)中の化合物40(10mg)の別の溶液にNMM(1μL)を添加し、溶液を40分間撹拌した。次いで、溶液を混合した後、追加量のHATU(4mg)およびNMM(1μL)を添加し、反応混合物を室温に温め、3.25時間撹拌した。次いで、反応溶液を真空中で濃縮し、緩衝液A(v/v):水:0.05%トリフルオロ酢酸および緩衝液B(v/v):アセトニトリル:0.05%トリフルオロ酢酸(70:30v/vから0:100v/v)で溶出する逆相C18カラムクロマトグラフィーにより精製した。有機溶媒を真空中で除去し、水性溶媒を凍結乾燥により除去して、試薬41を白色の固体(8.2mg)として得た。LC/MS:(ES+)[M+2Na]2+(1043,30%),[M+Na+H]2+(1033,60%),[M+2H]2+(1021,100%),[M+3H]3+(682,30%)。
0℃のDMF(2mL)中の化合物38(15.6mg)、化合物49(8mg)、およびHATU(6.6mg)の溶液にNMM(30μL)を添加し、混合物を0℃で90分間撹拌した。次いで、反応混合物を、緩衝液A(v/v):水:0.1%酢酸および緩衝液B(v/v):アセトニトリル:0.1%酢酸(100:0v/vから0:100v/v)で溶出する逆相C18カラムクロマトグラフィーにより直接精製した。所望の画分を混合し、凍結乾燥して、試薬47を白色の固体(15mg)として得た。1H NMR(500MHz;DMSO-d6)δ9.99(s,0.5H),9.92(s,0.5H),8.73(dd,J=7.2,5.1Hz,1H),8.40-8.39(m,0.5H),8.25(d,J=6.5Hz,0.5H),8.05-8.01(m,1H),7.97-7.87(m,2H),7.67-7.51(m,6H),7.46-7.44(m,3H),7.13-7.09(m,2H),6.86(s,1H),6.81(s,1H),6.65-6.60(m,1H),6.52(s,1H),6.23-6.21(m,1H),5.87(s,1H),5.42(dd,J=15.2,8.9Hz,1H),4.59-4.57(m,1H),4.46-4.39(m,2H),4.27-4.17(m,1H),4.13-4.09(m,1H),4.01-3.98(m,1H),3.84-3.80(m,2H),3.75-3.71(m,6H),3.51(s,96H),3.44-3.42(m,5H),3.38-3.36(m,1H),3.25(d,J=4.0Hz,6H),2.89-2.83(m,1H),2.70(d,J=9.4Hz,1H),2.46(s,6H),2.40-2.22(m,4H),2.08-1.90(m,3H),1.69(s,3H),1.51-1.45(m,2H),1.40-1.38(m,1H),1.33-1.31(m,4H),1.14(d,J=7.1Hz,6H),1.10(d,J=6.6Hz,4H),0.93(s,3H),0.90-0.84(m,6H)。LC/MS:(ES+)[M+2H]2+(1272,30%),[M+3H]3+(848,100%)。
0℃に冷却したDMF(1.5mL)中の化合物40(12mg)、化合物51(5.6mg)、およびHATU(8.2mg)の溶液にNMM(20μL)を添加し、混合物を0℃で2.5時間撹拌した。次いで、反応混合物を、緩衝液A(v/v):水:0.1%酢酸および緩衝液B(v/v):アセトニトリル:0.1%酢酸(100:0v/vから0:100v/v)で溶出する逆相C-18カラムクロマトグラフィーにより直接精製した。所望の画分を混合し、凍結乾燥して、試薬50を白色の固体(12mg)として得た。1H NMR(500MHz;DMSO-d6)δ10.06(s,1H),9.79-9.78(m,1H),8.18(d,J=7.3Hz,1H),7.91(d,J=8.8Hz,1H),7.82-7.80(m,1H),7.63(d,J=8.5Hz,2H),7.47(d,J=8.5Hz,2H),7.37(d,J=8.5Hz,2H),7.13(s,1H),7.08(d,J=8.0Hz,2H),7.00(s,2H),6.86(s,1H),6.80(s,1H),6.62(dd,J=15.3,11.2Hz,1H),6.21(d,J=11.1Hz,1H),6.04-6.01(m,1H),5.87(s,1H),5.45-5.40(m,3H),5.10(s,2H),4.59-4.56(m,1H),4.41-4.37(m,1H),4.25-4.22(m,1H),4.13-4.09(m,1H),3.76(s,3H),3.63-3.59(m,2H),3.54-3.50(m,2H),3.48-3.46(m,4H),3.38-3.36(m,4H),3.25(s,3H),3.17(q,J=5.8Hz,2H),3.04-2.92(m,2H),2.88-2.83(m,1H),2.70(d,J=9.7Hz,1H),2.67-2.61(m,1H),2.47-2.45(m,1H),2.41-2.36(m,1H),2.23(dd,J=13.0,0.8Hz,1H),2.04(t,J=7.4Hz,2H),2.01-1.94(m,1H),1.73-1.65(m,5H),1.63-1.58(m,1H),1.51-1.42(m,7H),1.40-1.35(m,2H),1.20-1.12(m,8H),1.10(d,J=6.6Hz,3H),0.94(s,3H),0.87(d,J=6.7Hz,3H),0.83(d,J=6.8Hz,3H)。LC/MS:(ES+)[M+H]+(1449,100%)。
4-アミノフェニルボロン酸をある範囲のアリールホウ素試薬で置き換えて、化合物52、53、54、55、56、57、58、59、60、61、62、63、および64を産生することにより、実施例3に記載したものと類似の手順を用いて一般式(XV)の一連のメイタンシノイド化合物を調製した。実施例3に記載される化合物構造および合成プロトコルに対する修飾を表5に示す。
化合物49の代わりに化合物68を使用して、実施例21の試薬47と同様の方法(工程3)で試薬66を合成した。試薬66を白色の固体として単離した。1H NMR(500MHz;DMSO-d6)δ10.02(s,1H),8.76(d,J=7.8Hz,0.5H),8.16-8.14(m,0.5H),8.05-8.02(m,1H),7.92-7.79(m,2H),7.69-7.61(m,2H),7.57-7.51(m,5H),7.47-7.43(m,4H),7.41-7.31(m,2H),7.12(d,J=0.4Hz,1H),7.09-7.08(m,2H),7.00(d,J=8.8Hz,2H),6.86(s,1H),6.81(s,1H),6.65-6.60(m,0.5H),6.53(s,0.5H),6.23-6.20(m,0.5H),5.99-5.97(m,0.5H),5.89-5.87(m,1H),5.45-5.40(m,3H),5.06-5.00(m,1H),4.59-4.53(m,0.5H),4.44-4.39(m,1H),4.27-4.24(m,0.5H),4.14-4.07(m,0.5H),4.02-3.97(m,0.5H),3.86-3.80(m,1H),3.76(s,3H),3.74-3.71(m,1.5H),3.68-3.63(m,0.5H),3.51(s,96H),3.46-3.42(m,5H),3.25(d,J=4.4Hz,7H),3.05-2.94(m,1.5H),2.90-2.85(m,0.5H),2.72-2.70(m,1H),2.66-2.63(m,2H),2.46(s,6H),2.40-2.37(m,2H),2.34-2.27(m,2H),2.20-2.17(m,1H),2.05-1.91(m,2H),1.72-1.68(m,4H),1.62-1.59(m,0.5H),1.52-1.35(m,4.5H),1.14(d,J=6.9Hz,6H),1.10(d,J=6.6Hz,3H),0.94(s,3H),0.88(d,J=6.5Hz,3H),0.84(d,J=6.7Hz,4H)。LC/MS:(ES+)[M+2H]2+(1368,20%),[M+3H]3+(912,70%),[M+4H]4+(684,100%)。
無水ジクロロメタン(3mL)中の化合物71(11mg)、EDC.HCl(15mg)、およびN-ヒドロキシスクシンイミド(10mg)の混合物を室温で72時間アルゴン雰囲気下で撹拌した。次いで、反応混合物を真空中で濃縮し、残渣をジクロロメタン:アセトニトリル(2mL、1:1v/v)に溶解した後、ジクロロメタン:アセトニトリル(100:0v/vから0:100v/v)で溶出する順相クロマトグラフィーにより精製した。所望の画分を混合し、溶媒を真空中で除去して、試薬70を白色の固体(12mg)として得た。1H NMR(500MHz;CDCl3):δ8.41(d,J=7.5Hz,1H),7.79-7.70(m,1H),7.12(s,1H),7.06-7.04(m,1H),6.86(d,J=11.8Hz,2H),6.48(dd,J=15.4,11.0Hz,1H),6.19(d,J=14.5Hz,2H),5.49-5.45(m,1H),4.83(dd,J=11.7,2.6Hz,1H),4.30(t,J=11.2Hz,1H),3.81(s,3H),3.56(d,J=12.8Hz,1H),3.52(d,J=8.8Hz,1H),3.37(s,3H),3.27(d,J=12.5Hz,2H),3.00(d,J=9.8Hz,2H),2.93(dd,J=13.0,4.8Hz,2H),2.87-2.79(m,7H),2.72(d,J=3.3Hz,3H),2.62(tt,J=13.4,6.5Hz,3H),2.23(d,J=14.2Hz,1H),2.07(dddd,J=31.6,23.4,16.2,7.7Hz,4H),1.74(s,3H),1.67(d,J=13.6Hz,1H),1.50(d,J=6.7Hz,1H),1.47(d,J=6.7Hz,1H),1.37(dd,J=6.8,1.7Hz,2H),1.34(d,J=6.9Hz,2H),1.31(d,J=6.3Hz,3H),1.26(q,J=8.3Hz,5H),1.20(d,J=6.7Hz,3H),0.94(s,3H)。LC/MS:(ES+)[M+H]+(1071,100%),[M+Na]+(1093,80%)。
無水DMF(0.9mL)中の化合物74(52mg)の溶液に、試薬25(21mg)、続いてNMM(9μL)を添加し、混合物を室温で撹拌した。2および4時間後、さらに6時間後に追加量のNMM(2×9μL)を添加し、反応溶液を-20℃でさらに16時間保存した。次いで、反応溶液を真空中で濃縮し、残渣をアセトニトリル(400μL)に溶解し、その後、緩衝液A(v/v):水:0.05%トリフルオロ酢酸および緩衝液B(v/v):アセトニトリル:0.05%トリフルオロ酢酸(70:30v/vから0:100v/v)で溶出する逆相C18カラムクロマトグラフィーにより精製した。所望の画分を混合し、凍結乾燥して、試薬72を白色の固体(17mg)として得た。MS:(ES+)[M+2Na]2+(1333,10%)、[M+3H]3+(874,100%),[M+4H]4+(656,30%)。
化合物26の代わりに化合物76を使用して、実施例12の試薬25と同様の方法で試薬75を合成した。試薬75を白色の固体として単離した。1H NMR(500MHz;CDCl3)δ7.76-7.70(m,1H),7.58-7.56(m,2H),7.08-7.06(m,2H),6.84(d,J=0.4Hz,1H),6.72-6.68(m,2H),6.46(dd,J=15.3,11.3Hz,1H),6.25(s,1H),5.72-5.67(m,1H),5.36-5.32(m,1H),4.82-4.79(m,1H),4.30(td,J=11.2,1.4Hz,1H),3.81(s,3H),3.70(d,J=12.9Hz,1H),3.52(d,J=9.1Hz,1H),3.37(s,3H),3.18-3.15(m,1H),3.09-3.02(m,2H),2.96-2.73(m,6H),2.66(s,3H),2.54-2.51(m,2H),2.28-2.24(m,1H),2.15-1.95(m,6H),1.69(s,3H),1.66(d,J=0.4Hz,1H),1.53-1.47(m,1H),1.37(d,J=6.7Hz,3H),1.34-1.25(m,13H),0.92(s,3H)。LC/MS:(ES+)[M+H]+(1094,100%)。
化合物26の代わりに化合物78を使用して、実施例12の試薬25と同様の方法で試薬77を合成した。試薬77を白色の固体として単離した。1H NMR(500MHz;CDCl3):δ6.86-6.83(m,1H),6.75(t,J=8.8Hz,1H),6.64(d,J=4.8Hz,1H),6.43(dd,J=15.3,11.2Hz,1H),6.20(s,1H),5.67(ddd,J=15.0,9.4,5.2Hz,1H),5.42(q,J=6.7Hz,1H),4.78(dd,J=12.0,2.7Hz,1H),4.27(t,J=11.3Hz,1H),3.98(s,3H),3.65(d,J=12.7Hz,1H),3.50(d,J=9.0Hz,1H),3.35(s,3H),3.22(s,3H),3.13(t,J=10.2Hz,1H),3.04(d,J=9.7Hz,1H),2.85(d,J=3.4Hz,9H),2.72(t,J=6.9Hz,2H),2.61(t,J=13.2Hz,1H),2.55-2.49(m,1H),2.46-2.35(m,1H),2.17(dd,J=14.3,2.4Hz,1H),2.04-1.83(m,4H),1.64(s,3H),1.57(d,J=13.6Hz,1H),1.51(s,2H),1.48-1.44(m,1H),1.30-1.23(m,14H),0.80(s,3H)。LC/MS:(ES+)[M-H2O+H]+(977,100%),[M+H]+(995,15%),[M+Na]+(1017,55%)。
本発明の化合物で処理した後の腫瘍細胞の生存の消失を、実施例2に記載のように、増加濃度の本発明の化合物の存在下でSK-BR-3細胞株を成長させ、増殖または代謝活性の消失を定量することによって試験した。本発明の化合物についての平均IC50値を表6に示し、アッセイ濃度を表7に特定する。
WO2014064423およびWO2014064424に記載されているものと同様の方法を用いて、コンジュゲーション試薬35、47、69、および72をトラスツズマブにコンジュゲートして、ADC82、83、84、および85を得た。
実施例33に記載されているものと同様の方法を用いて、コンジュゲーション試薬41をブレンツキシマブにコンジュゲートしてADC86を得た。簡単に説明すると、ブレンツキシマブ(20mMリン酸ナトリウム、150mM NaCl、20mM EDTA、pH7.5中8.5mg/mL)を15分間加熱ブロック中で40℃に加熱した。TCEP(6当量/mAb)をmAb溶液に添加し、穏やかに混合し、40℃で1時間インキュベートした後、22℃に冷却した。コンジュゲーション試薬41をDMFに溶解して1.6mM溶液を得た。還元mAb溶液を、20mMリン酸ナトリウム、150mM NaCl、20mM EDTA、pH7.5)で6.7mg/mLに希釈し、続いてプロピレングリコールを添加して、4.4mg/mLの最終還元mAb溶液濃度を得た。コンジュゲーション試薬(6当量/mAb)をmAb溶液に添加して、4mg/mLの最終抗体濃度を得た。反応溶液を穏やかに混合し、22℃で24時間インキュベートした。この後、反応溶液を、22℃で30分間、50mM N-アセチル-L-システイン(試薬に対して20当量)で処理した。次いで、粗反応溶液を等体積の50mMリン酸ナトリウム、4M NaCl、pH7と混合し、得られた溶液を50mMリン酸ナトリウム、2M NaCl、pH7で平衡化したToyoPearl Phenyl-650S HICカラムにロードした。ADCは、50mMリン酸ナトリウム、pH7(20%イソプロパノール)の勾配でカラムから溶出した。DAR4ADCを含有する画分をプールし、濃縮した(Vivaspin20、10kDa PES膜)。濃縮した試料をDPBS、pH7.1~7.5に緩衝液交換し、滅菌濾過した(0.22μmのPVDF膜)。ADCを、10mMリン酸ナトリウム、pH6.7で平衡化したヒドロキシアパタイトForesight CHTカラムを使用してさらに精製した。ADCは、10mMリン酸ナトリウム、2M NaCl、pH6.7の勾配でカラムから溶出した。ADCを含有する画分をプールし、濃縮し(Vivaspin20、30kDa PES膜)、濃縮した試料をDPBS、pH7.1~7.5に緩衝液交換し、滅菌濾過した(0.22μmのPVDF膜)。実施例33に記載の方法を用いてコンジュゲートのDARを決定した。
コンジュゲーション試薬50をトラスツズマブにコンジュゲートして、ADC87を得た。簡単に説明すると、試薬50をDMSOに溶解して10mMストック溶液を得た。100mM HEPES緩衝液、1mM EDTA、pH7.0(5mg/mL mAb濃度)中のトラスツズマブを、37℃で2時間、TCEP(2.2当量/mAb)で還元した。還元mAb溶液を25℃に冷却し、次いでDMSO(10%v/v)で希釈した。次いで、コンジュゲーション試薬50(10当量/mAb)を還元mAb溶液に添加し、反応混合物を穏やかに混合し、25℃で30分間インキュベートした。反応溶液をN-アセチルシステイン(10当量/mAb)と共に25℃で30分間インキュベートすることにより、過剰の試薬50をクエンチした。次いで、活性炭粉末(70%w/wのmAb)を反応溶液に添加し、これを室温で30分間穏やかに撹拌して未反応の薬物関連種を除去した。次いで、反応混合物を濾過し(0.22μmのPES膜)、精製した試料をPD-10脱塩カラムを使用して10mMコハク酸、6%w/vトレハロース、0.01%v/v Tween20、pH5.5に緩衝液交換した。実施例33に記載の方法を用いて、4の平均DARをコンジュゲート87に割り当てた。
以下の一般的なコンジュゲーションプロトコルを使用して、コンジュゲーション試薬70、75、および77(比較物)をトラスツズマブにコンジュゲートし、それぞれADC88、89、および90(比較物)を得た。簡単に説明すると、試薬をDMFに溶解して1.8~4.0mMストック溶液を得た。20mMリン酸ナトリウム、150mM NaCl、20mM EDTA、pH7.5中のトラスツズマブの溶液に、試薬ストック溶液(1回の添加としてまたはインキュベーション期間を通して複数のアリコートとしてのいずれかで5~20当量/mAb)を添加して、3.0~4.0mg/mLの最終抗体濃度(DMF10%v/vを含有する)を得た。反応溶液を22℃で1~4時間インキュベートした。
実施例2に記載のように、本発明のメイタンシノイドを組み込むADCで処理した後の腫瘍細胞の生存の消失を、増加濃度のADCの存在下で細胞株を成長させ、増殖または代謝活性の消失を定量することによって試験した。本発明のメイタンシノイドを組み込むADCの平均IC50値を表8に示し、アッセイ濃度を表9に特定する。
DMF:緩衝液(20mMリン酸ナトリウム、150mM塩化ナトリウム、20mM EDTA、pH7.5)の50/50v/v混合物(0.5mg/mL)中の化合物26および78(比較物)の溶液を、マウス血清中0.05mg/mL(90%(v/v)血清含有量)に希釈した。「0」時点に対応する各試料のアリコートを-80℃で直ちに凍結し、一方残りの試料を37℃で7日間インキュベートした。さらなるアリコートを4日後および7日後に採取し、-80℃で凍結した。分析の前に、試料を冷凍庫から取り出し、メイタンシノイド関連種をタンパク質沈殿によって血清から抽出した。各時点のアリコートにアセトニトリル(75%v/v)を添加し、穏やかに混合した後、混合物を4℃で2時間放置することによってタンパク質沈殿を行った。次いで、沈殿したタンパク質を遠心分離(1400×g、30分、4℃)により分離し、抽出したメイタンシノイド関連種を含有する上清をLC-Orbitrap-MSにより分析した。
Claims (33)
- 一般式I:
式中、Rが、基-Y-OH、-Y-SH、-Y-S(O)2NH-Rx、-Y-NHS(O)2-Rx 、-Y-CO2H、-Y-C(O)NH-Rx、-Y-NHC(O)-Rx、-Y-NHRy 、または-Y-S(O)2NH2を表し、
式中、Yが存在しないか、またはYがC 1-6アルキレンを表し、
Rxが、-OH、-SH、-NH 2 、または-CO2Hで置換されている、C1-6アルキルを表し、
R y が、水素原子、またはC1-4アルキル基を表し、
Xが、OHを表し、
Raが、C 1-4アルキル基を表し、
Rbが、水素を表し、
Rcが、水素、またはメトキシを表し、
Rdが、C 1-4アルキル基を表し、
各Reが、独立して、ハロゲン原子、CF 3 基、C 1-4 アルキル基、C 1-4 アルコキシ基、-CN基、または-NO 2 基を表し、
nが、0、1、または2であり、
Rfが、C 1-4アルキル基を表し、
Rgが、
水素原子、
アルキル基、
シクロアルキル基、
アルケニル基、
アルキニル基、
アリール基、
ヘテロアリール基、
1つ以上のC 1-4 アルキル基で置換されているシクロアルキル基、
ハロゲン原子、アルキル基、ハロアルキル基、ヒドロキシル基、アミノ基、アルキルアミノ基、ジアルキルアミノ基、およびアルコキシ基から選択される1つ以上の基で置換されているアリール基、
ハロゲン原子、アルキル基、ハロアルキル基、ヒドロキシ基、アミノ基、アルキルアミノ基、ジアルキルアミノ基、およびアルコキシ基から選択される1つ以上の基で置換されているヘテロアリール基、
アルキル基であって、
i)1個以上のハロゲン原子、および/もしくはヒドロキシル、アルコキシ、アミノ、アルキルアミノ、もしくはジアルキルアミノ基(ここで、任意のアルキル部分が、1~4個の炭素原子を有する)、
ii)1つ以上のアミノ酸、または
iii)基N(R i )(R ii )(式中、R i は、水素またはC 1-4 アルキル基を表し、R ii は、C 1-4 アルキル基、-C(O)-C 1-6 アルキル基、-C(O)-C 2-6 アルケニル基、-C(O)-C 3-6 シクロアルキル基、または最大2個のメチル基で置換されているC 3-6 シクロアルキル基を表す)
で置換されている、アルキル基
を表す、化合物またはその塩。 - Rが、-Y-SH、-Y-S(O) 2 NH-R x 、-Y-NHS(O) 2 -R x 、-Y-C(O)NH-R x 、-Y-NHC(O)-R x 、または-Y-S(O) 2 NH 2 から選択される基を表し、R x は、請求項1に規定される通りである、請求項1に記載の化合物。
- Rが、-Y-NHC(O)-R x を表し、R x は、請求項1に規定される通りである、請求項1または2に記載の化合物。
- Rdが、メチルである、請求項1~3のいずれかに記載の化合物。
- 存在する任意のRe基が、ハロゲン原子、メトキシ基、-CN基、または-NO2基からなる群から選択される、請求項1~4のいずれかに記載の化合物。
- Rgが、C 1-4 アルキルまたはN(Ri)(Rii)で置換されているC1-4アルキルを表し、Riが、C1-4アルキル基を表し、Riiが、-C(O)-C1-6アルキル基を表す、請求項1~5のいずれかに記載の化合物。
- 存在する任意のRe基が、ハロゲン原子またはメチルもしくはメトキシ基である、請求項1~6のいずれか一項に記載の化合物。
- リンカーを介して結合タンパク質に連結されている、請求項1~9のいずれか一項に記載の化合物を含むコンジュゲートであって、前記リンカーが、一般式Iの基Rを介して前記化合物に接続されており、
i)前記リンカーが、
a)基-S-C 1-6 アルキレン-、ならびに/または
b)少なくとも2つの天然に存在するアルファアミノ酸を含むペプチジル基、および/もしくはジスルフィド基
を含み、
ii)前記結合タンパク質が、全長抗体または前記全長抗体の抗原結合領域を含む抗体断片であり、前記抗体が、免疫グロブリンである、
コンジュゲート。 - 前記結合タンパク質が、IgG1もしくはIgG4、またはIgG1もしくはIgG4の断片である、請求項10に記載のコンジュゲート。
- 以下の部分:
式中、W’が、ケト基、エステル基-O-CO-、スルホン基-SO 2 -、CH(OH)基を含有する部分、CH.NH 2 、CH.NHR aa 、もしくはCH.NR aa 2 、スルホキシド基、スルフィド基、もしくはチオールエーテル基を表し、各R aa が、独立して、水素原子、もしくはアルキル基、アリール基、もしくはアルキル-アリール基を表し、
AおよびBがそれぞれ、独立して、C1-5アルキレンもしくはアルケニレン鎖を表し、
Prが、求核剤Nuを介してAおよびBに結合した前記結合タンパク質を表し、各Nuが、前記結合タンパク質Pr中のシステイン残基に存在する硫黄原子を表すか、もしくは各Nuが、前記結合タンパク質に結合したポリヒスチジンタグに存在するイミダゾール基を表す、部分を含むか、または
以下の部分:
~W’-(CH=CH)p-(CH2)2-Nu-Pr
であって、
式中、W’が、ケト基、エステル基-O-CO-、スルホン基-SO 2 -、CH(OH)基を含有する部分、CH.NH 2 、CH.NHR aa 、もしくはCH.NR aa 2 、スルホキシド基、スルフィド基、もしくはチオールエーテル基を表し、各R aa が、水素原子、もしくはアルキル基、アリール基、もしくはアルキル-アリール基を表し、
pが、0もしくは1~4の整数であり、
Prが、求核剤Nuを介して分子の残りの部分に結合した前記結合タンパク質を表し、各Nuが、前記結合タンパク質Pr中のシステイン残基に存在する硫黄原子を表すか、もしくは各Nuが、前記結合タンパク質に結合したポリヒスチジンタグに存在するイミダゾール基を表す、
部分を含む、請求項10または11に記載のコンジュゲート。 - 以下の部分:
以下の部分:
~NH-CO-Ar’-CO-(CH2)2-Nu-Pr
であって、
式中、Ar’が、アリール基、またはアルキル、OHで置換されているアルキル、CO 2 Hで置換されているアルキル、-CF 3 、-NR aa 2 、-CN、-NO 2 、-CO 2 R aa 、-COH、-CH 2 OH、-COR aa 、-OR aa 、-OCOR aa 、-OCO 2 R aa 、-SR aa 、-SOR aa 、-SO 2 R aa 、-NHCOR aa 、-NR aa COR aa 、-NHCO 2 R aa 、-NR aa .CO 2 R aa 、-NO、-NHOH、-NR aa .OH、-CH=N-NHCOR aa 、-CH=N-NR aa .COR aa 、-N + R aa 3 、-N + H 3 、-N + HR aa 2 、-N + H 2 R aa 、ハロゲン、-C≡CR aa 、-CH=CR aa 2 、および-CH=CHR aa から選択される同一または異なる置換基のうちの1つ以上で置換されているアリール基を表し、
式中、各R aa は、独立して、水素原子、アルキル基、アリール基、またはアルキル-アリール基を表す、
部分を含む、請求項12に記載のコンジュゲート。 - 前記リンカーが、式-CH2CH2ORr(式中、Rrが、水素原子、アルキル基、アリール基を表す)の末端基を有するペンダントポリエチレングリコール鎖を含む、請求項10~13のいずれか一項に記載のコンジュゲート。
- 前記リンカーが、環内に少なくとも2つの~(CH2-CH2-O-)~単位を含む、請求項10~14のいずれか一項に記載のコンジュゲート。
- 前記リンカーが、配列Val-Cit-PABまたはVal-Alaを含む、請求項10~13のいずれか一項に記載のコンジュゲート。
- AAが、Val-Citを表す、請求項17に記載のコンジュゲート。
- 結合タンパク質と反応可能な少なくとも1つの官能基にリンカーを介して結合されている、請求項1~9のいずれか一項に記載の化合物を含むコンジュゲート試薬であって、前記リンカーが、一般式Iの基Rを介して前記化合物に接続されており、
i)前記結合タンパク質が、全長抗体または前記全長抗体の抗原結合領域を含む抗体断片であり、前記抗体は、免疫グロブリンであり、
ii)前記リンカーが、少なくとも2つの天然に存在するアルファアミノ酸を含むペプチジル基、および/またはジスルフィド基を含む、
コンジュゲート試薬。 - 前記結合タンパク質が、IgG1もしくはIgG4、またはIgG1もしくはIgG4の断片である、請求項19に記載のコンジュゲート試薬。
- 前記リンカーが、配列Val-Cit-PABまたはVal-Alaを含む、請求項19に記載のコンジュゲート試薬。
- 前記官能基が、以下の式:
Wは、ケト基、エステル基-O-CO-、またはスルホン基-SO 2 -を表し、
AおよびBはそれぞれ、独立して、C1-5アルキレンまたはアルケニレン鎖を表し、
各Lは、独立して、脱離基を表すか、または両方のLが一緒になって脱離基を表すかのいずれかである)、または
WおよびAは、上記の意味を有し、
Lは、脱離基を表し、
mは、0~4である)、または
~W-(CH=CH)p-(CH2)2-Lもしくは~W-(CH=CH)p-CH=CH2
(式中、
Wは、ケト基、エステル基-O-CO-、またはスルホン基-SO 2 -を表し、
pは、0または1~4の整数を表し、
Lは、脱離基を表す)を有する、請求項19~21のいずれか一項に記載のコンジュゲート試薬。 - 前記官能基が、以下の式:
~NH-CO-Ar’-CO-(CH2)2-Lもしくは~NH-CO-Ar’-CO-CH=CH 2
を有し、
式中、Ar’が、アリール基、またはアルキル、OHで置換されているアルキル、CO 2 Hで置換されているアルキル、-CF 3 、-NR aa 2 、-CN、-NO 2 、-CO 2 R aa 、-COH、-CH 2 OH、-COR aa 、-OR aa 、-OCOR aa 、-OCO 2 R aa 、-SR aa 、-SOR aa 、-SO 2 R aa 、-NHCOR aa 、-NR aa COR aa 、-NHCO 2 R aa 、-NR aa .CO 2 R aa 、-NO、-NHOH、-NR aa .OH、-CH=N-NHCOR aa 、-CH=N-NR aa .COR aa 、-N + R aa 3 、-N + H 3 、-N + HR aa 2 、-N + H 2 R aa 、ハロゲン、-C≡CR aa 、-CH=CR aa 2 、および-CH=CHR aa から選択される同一または異なる置換基のうちの1つ以上で置換されているアリール基を表し、
式中、各R aa は、独立して、水素原子、アルキル基、アリール基、またはアルキル-アリール基を表す、請求項24に記載のコンジュゲート試薬。 - 前記脱離基または各脱離基が、部分-(CH2CH2O)q-(式中、qは、6以上の数である)を含む、請求項24または25に記載のコンジュゲート試薬。
- 前記リンカーが、請求項14~18のいずれか一項に規定される特徴を含む、請求項19~26のいずれか一項に記載のコンジュゲート試薬。
- 請求項1~9のいずれか一項に記載の化合物、または請求項10~18のいずれか一項に記載のコンジュゲートを、薬学的に許容される担体と一緒に、任意選択で追加の治療薬と一緒に含む、医薬組成物。
- 治療に使用するための、請求項1~9のいずれか一項に記載の化合物または請求項10~18のいずれか一項に記載のコンジュゲートを含む組成物。
- 前記アリール-有機金属試薬が、アリール-ボロン酸またはアリール-ボロン酸エステルであり、前記反応が、水の存在下、および酸素の不在または実質的な不在下で、パラジウム触媒の存在下で実施される、請求項30に記載のプロセス。
- 以下の一般式:
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GB201615725D0 (en) | 2016-11-02 |
ES2882016T3 (es) | 2021-11-30 |
EP3512856A1 (en) | 2019-07-24 |
US20190202839A1 (en) | 2019-07-04 |
WO2018051109A1 (en) | 2018-03-22 |
JP2020500148A (ja) | 2020-01-09 |
CN109790178B (zh) | 2022-05-03 |
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