JP6845531B2 - 免疫チェックポイント阻害作用を有するインドールアルカロイド型化合物 - Google Patents
免疫チェックポイント阻害作用を有するインドールアルカロイド型化合物 Download PDFInfo
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- JP6845531B2 JP6845531B2 JP2018507460A JP2018507460A JP6845531B2 JP 6845531 B2 JP6845531 B2 JP 6845531B2 JP 2018507460 A JP2018507460 A JP 2018507460A JP 2018507460 A JP2018507460 A JP 2018507460A JP 6845531 B2 JP6845531 B2 JP 6845531B2
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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
- 238000000655 nuclear magnetic resonance spectrum Methods 0.000 description 1
- 239000002674 ointment Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 125000001715 oxadiazolyl group Chemical group 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 125000004430 oxygen atom Chemical group O* 0.000 description 1
- 229910052763 palladium Inorganic materials 0.000 description 1
- 229940049954 penicillin Drugs 0.000 description 1
- RGSFGYAAUTVSQA-UHFFFAOYSA-N pentamethylene Natural products C1CCCC1 RGSFGYAAUTVSQA-UHFFFAOYSA-N 0.000 description 1
- 125000002255 pentenyl group Chemical group C(=CCCC)* 0.000 description 1
- 125000001147 pentyl group Chemical group C(CCCC)* 0.000 description 1
- 125000005981 pentynyl group Chemical group 0.000 description 1
- VLTRZXGMWDSKGL-UHFFFAOYSA-M perchlorate Inorganic materials [O-]Cl(=O)(=O)=O VLTRZXGMWDSKGL-UHFFFAOYSA-M 0.000 description 1
- VLTRZXGMWDSKGL-UHFFFAOYSA-N perchloric acid Chemical compound OCl(=O)(=O)=O VLTRZXGMWDSKGL-UHFFFAOYSA-N 0.000 description 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- 230000035790 physiological processes and functions Effects 0.000 description 1
- 239000000419 plant extract Substances 0.000 description 1
- 235000013855 polyvinylpyrrolidone Nutrition 0.000 description 1
- 229920000036 polyvinylpyrrolidone Polymers 0.000 description 1
- XAEFZNCEHLXOMS-UHFFFAOYSA-M potassium benzoate Chemical compound [K+].[O-]C(=O)C1=CC=CC=C1 XAEFZNCEHLXOMS-UHFFFAOYSA-M 0.000 description 1
- 229940069328 povidone Drugs 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000002243 precursor Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 125000004368 propenyl group Chemical group C(=CC)* 0.000 description 1
- 230000000069 prophylactic effect Effects 0.000 description 1
- 125000001501 propionyl group Chemical group O=C([*])C([H])([H])C([H])([H])[H] 0.000 description 1
- 125000002568 propynyl group Chemical group [*]C#CC([H])([H])[H] 0.000 description 1
- 102000004169 proteins and genes Human genes 0.000 description 1
- 108090000623 proteins and genes Proteins 0.000 description 1
- 230000002685 pulmonary effect Effects 0.000 description 1
- 125000002098 pyridazinyl group Chemical group 0.000 description 1
- 238000001959 radiotherapy Methods 0.000 description 1
- 238000001953 recrystallisation Methods 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 125000002914 sec-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 210000002966 serum Anatomy 0.000 description 1
- 150000003384 small molecules Chemical class 0.000 description 1
- 235000017557 sodium bicarbonate Nutrition 0.000 description 1
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 1
- 235000019812 sodium carboxymethyl cellulose Nutrition 0.000 description 1
- 229920001027 sodium carboxymethylcellulose Polymers 0.000 description 1
- AJPJDKMHJJGVTQ-UHFFFAOYSA-M sodium dihydrogen phosphate Chemical compound [Na+].OP(O)([O-])=O AJPJDKMHJJGVTQ-UHFFFAOYSA-M 0.000 description 1
- 239000001488 sodium phosphate Substances 0.000 description 1
- 159000000000 sodium salts Chemical class 0.000 description 1
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical class O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000010186 staining Methods 0.000 description 1
- 125000004079 stearyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 239000005720 sucrose Substances 0.000 description 1
- 235000000346 sugar Nutrition 0.000 description 1
- 239000000829 suppository Substances 0.000 description 1
- 238000001356 surgical procedure Methods 0.000 description 1
- 239000000375 suspending agent Substances 0.000 description 1
- 208000024891 symptom Diseases 0.000 description 1
- 239000006188 syrup Substances 0.000 description 1
- 235000020357 syrup Nutrition 0.000 description 1
- 239000003826 tablet Substances 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- 235000012222 talc Nutrition 0.000 description 1
- 150000003892 tartrate salts Chemical class 0.000 description 1
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 125000003718 tetrahydrofuranyl group Chemical group 0.000 description 1
- 125000001412 tetrahydropyranyl group Chemical group 0.000 description 1
- ZRKFYGHZFMAOKI-QMGMOQQFSA-N tgfbeta Chemical compound C([C@H](NC(=O)[C@H](C(C)C)NC(=O)CNC(=O)[C@H](CCC(O)=O)NC(=O)[C@H](CCCNC(N)=N)NC(=O)[C@H](CC(N)=O)NC(=O)[C@H](CC(C)C)NC(=O)[C@H]([C@@H](C)O)NC(=O)[C@H](CCC(O)=O)NC(=O)[C@H]([C@@H](C)O)NC(=O)[C@H](CC(C)C)NC(=O)CNC(=O)[C@H](C)NC(=O)[C@H](CO)NC(=O)[C@H](CCC(N)=O)NC(=O)[C@@H](NC(=O)[C@H](C)NC(=O)[C@H](C)NC(=O)[C@@H](NC(=O)[C@H](CC(C)C)NC(=O)[C@@H](N)CCSC)C(C)C)[C@@H](C)CC)C(=O)N[C@@H]([C@@H](C)O)C(=O)N[C@@H](C(C)C)C(=O)N[C@@H](CC=1C=CC=CC=1)C(=O)N[C@@H](C)C(=O)N1[C@@H](CCC1)C(=O)N[C@@H]([C@@H](C)O)C(=O)N[C@@H](CC(N)=O)C(=O)N[C@@H](CCC(O)=O)C(=O)N[C@@H](C)C(=O)N[C@@H](CC=1C=CC=CC=1)C(=O)N[C@@H](CCCNC(N)=N)C(=O)N[C@@H](C)C(=O)N[C@@H](CC(C)C)C(=O)N1[C@@H](CCC1)C(=O)N1[C@@H](CCC1)C(=O)N[C@@H](CCCNC(N)=N)C(=O)N[C@@H](CCC(O)=O)C(=O)N[C@@H](CCCNC(N)=N)C(=O)N[C@@H](CO)C(=O)N[C@@H](CCCNC(N)=N)C(=O)N[C@@H](CC(C)C)C(=O)N[C@@H](CC(C)C)C(O)=O)C1=CC=C(O)C=C1 ZRKFYGHZFMAOKI-QMGMOQQFSA-N 0.000 description 1
- 125000001113 thiadiazolyl group Chemical group 0.000 description 1
- JOXIMZWYDAKGHI-UHFFFAOYSA-N toluene-4-sulfonic acid Chemical class CC1=CC=C(S(O)(=O)=O)C=C1 JOXIMZWYDAKGHI-UHFFFAOYSA-N 0.000 description 1
- 230000000699 topical effect Effects 0.000 description 1
- 125000004306 triazinyl group Chemical group 0.000 description 1
- ITMCEJHCFYSIIV-UHFFFAOYSA-N triflic acid Chemical compound OS(=O)(=O)C(F)(F)F ITMCEJHCFYSIIV-UHFFFAOYSA-N 0.000 description 1
- RYFMWSXOAZQYPI-UHFFFAOYSA-K trisodium phosphate Chemical compound [Na+].[Na+].[Na+].[O-]P([O-])([O-])=O RYFMWSXOAZQYPI-UHFFFAOYSA-K 0.000 description 1
- 229910000406 trisodium phosphate Inorganic materials 0.000 description 1
- 235000019801 trisodium phosphate Nutrition 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
Images
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D471/00—Heterocyclic compounds containing nitrogen atoms as the only ring hetero atoms in the condensed system, at least one ring being a six-membered ring with one nitrogen atom, not provided for by groups C07D451/00 - C07D463/00
- C07D471/12—Heterocyclic compounds containing nitrogen atoms as the only ring hetero atoms in the condensed system, at least one ring being a six-membered ring with one nitrogen atom, not provided for by groups C07D451/00 - C07D463/00 in which the condensed system contains three hetero rings
- C07D471/14—Ortho-condensed systems
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K39/00—Medicinal preparations containing antigens or antibodies
- A61K39/39—Medicinal preparations containing antigens or antibodies characterised by the immunostimulating additives, e.g. chemical adjuvants
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P37/00—Drugs for immunological or allergic disorders
- A61P37/02—Immunomodulators
- A61P37/06—Immunosuppressants, e.g. drugs for graft rejection
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D401/00—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, at least one ring being a six-membered ring with only one nitrogen atom
- C07D401/02—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, at least one ring being a six-membered ring with only one nitrogen atom containing two hetero rings
- C07D401/06—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, at least one ring being a six-membered ring with only one nitrogen atom containing two hetero rings linked by a carbon chain containing only aliphatic carbon atoms
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D491/00—Heterocyclic compounds containing in the condensed ring system both one or more rings having oxygen atoms as the only ring hetero atoms and one or more rings having nitrogen atoms as the only ring hetero atoms, not provided for by groups C07D451/00 - C07D459/00, C07D463/00, C07D477/00 or C07D489/00
- C07D491/02—Heterocyclic compounds containing in the condensed ring system both one or more rings having oxygen atoms as the only ring hetero atoms and one or more rings having nitrogen atoms as the only ring hetero atoms, not provided for by groups C07D451/00 - C07D459/00, C07D463/00, C07D477/00 or C07D489/00 in which the condensed system contains two hetero rings
- C07D491/04—Ortho-condensed systems
- C07D491/044—Ortho-condensed systems with only one oxygen atom as ring hetero atom in the oxygen-containing ring
- C07D491/052—Ortho-condensed systems with only one oxygen atom as ring hetero atom in the oxygen-containing ring the oxygen-containing ring being six-membered
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K39/00—Medicinal preparations containing antigens or antibodies
- A61K2039/555—Medicinal preparations containing antigens or antibodies characterised by a specific combination antigen/adjuvant
- A61K2039/55511—Organic adjuvants
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- Microbiology (AREA)
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- Epidemiology (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
- Nitrogen Condensed Heterocyclic Rings (AREA)
- Plural Heterocyclic Compounds (AREA)
- Medicines Containing Antibodies Or Antigens For Use As Internal Diagnostic Agents (AREA)
- Medicines Containing Plant Substances (AREA)
Description
[1] 式(I):
a〜c:
環Aは、C3−6シクロアルキル環、C3−6シクロアルケニル環または5員もしくは6員の単環式ヘテロ環であり、ここで、該シクロアルキル環、シクロアルケン環および単環式ヘテロ環は、置換可能な位置で、ハロゲン、ヒドロキシ、オキソ、アミノ、ニトロ、モノ−もしくはジ−C1−6アルキル−アミノ、C1−4アシル、C1−6アルキル、C1−6ハロアルキル、C1−6ヒドロキシアルキル、C1−6アルコキシ、およびC1−6ハロアルコキシからなる群から選択される1つまたは同一もしくは異なる2つ以上の基で置換されていてもよく;
R1、R1’、R2、R2’およびR3は、各々独立して、水素、ハロゲン、ヒドロキシ、アミノ、ニトロ、モノ−もしくはジ−C1−6アルキル−アミノ、C1−6アルキル、C1−6ハロアルキル、C1−6ヒドロキシアルキル、C1−6アルコキシまたはC1−6ハロアルコキシであり;
R4は、水素、ハロゲン、ヒドロキシ、アミノ、モノ−もしくはジ−C1−6アルキル−アミノ、C1−6アルキル、C2−6アルケニル、C2−6アルキニル、C1−6アルコキシ、C3−6シクロアルキル、3員ないし6員のヘテロシクロアルキル、C6−10アリールまたは6員ないし10員のヘテロアリールであり、ここで、該アルキル、アルケニル、アルキニル、アルコキシ、シクロアルキル、ヘテロシクロアルキル、アリールおよびヘテロアリールは、各々独立して、置換可能な位置で、ハロゲン、ヒドロキシ、アミノ、ニトロ、モノ−もしくはジ−C1−6アルキルアミノ、C1−4アシル、C1−6アルキル、C1−6ハロアルキル、C1−6ヒドロキシアルキル、C1−6アルコキシ、およびC1−6ハロアルコキシからなる群から選択される1つまたは同一もしくは異なる2つ以上の基で置換されていてもよく;
R5、R6およびR7は、各々独立して、水素、ハロゲン、ヒドロキシ、C1−3アルキル、C1−3ハロアルキル、C1−3ヒドロキシアルキル、C1−3アルコキシまたはC1−3ハロアルコキシであり;
R8は、各々独立して、水素、ハロゲン、ヒドロキシ、アミノ、ニトロ、モノ−もしくはジ−C1−6アルキル−アミノ、C1−6アルキル、C2−6アルケニル、C2−6アルキニル、C1−6アルコキシ、ベンジルオキシ、C3−6シクロアルキル、3員ないし6員のヘテロシクロアルキル、C6−10アリールまたは6員ないし10員のヘテロアリールであり、ここで、該アルキル、アルケニル、アルキニル、アルコキシ、シクロアルキル、ヘテロシクロアルキル、アリールまたはヘテロアリールは、置換可能な位置で、ハロゲン、ヒドロキシ、アミノ、モノ−もしくはジ−C1−6アルキル−アミノ、C1−4アシル、C1−6アルキル、C1−6ハロアルキル、C1−6ヒドロキシアルキル、C1−6アルコキシ、およびC1−6ハロアルコキシからなる群から選択される1つまたは同一もしくは異なる2つ以上の基で置換されていてもよく;および
nは、1〜4である]
で示される化合物またはその医薬的に許容される塩。
用語「C1−6アルキル」とは、1〜6個の炭素原子を有する、直鎖状または分枝鎖状の飽和炭化水素を意味し、これらは、所望により本発明に含まれる1以上の基で置換されていてもよい。「C1−6アルキル」は、好ましくは炭素数が1〜5、1〜4、または1〜3であってもよい。かかる具体例として、メチル、エチル、プロピル、イソプロピル、ブチル、イソブチル、sec−ブチル、tert−ブチル、ぺンチル、イソペンチル、ネオペンチル、ヘキシル等が挙げられる。
本発明の化合物が酸性官能基を有する場合、各種の塩基と塩を形成しうる。塩基付加塩の具体例としては、ナトリウム塩、カリウム塩等のアルカリ金属塩、カルシウム塩等のアルカリ土類金属塩、またはアンモニウム塩等が挙げられる。
これらの塩は、本発明の化合物を酸または塩基と混合した後、再結晶等の常法により得ることができる。
本発明の化合物は、水和物および/または溶媒和物の形で存在することもあるので、これらの水和物および/または溶媒和物もまた本発明の化合物に包含される。溶媒和物としてはエタノール溶媒和物等が挙げられる。
かかる有効量として、本発明の化合物単独の量、本発明の化合物の組み合わせの量および/またはがん治療に有用な他の活性成分と組み合わせた本発明の化合物の量が挙げられる。
また、本発明の化合物のいずれか1つまたは2つ以上の1Hを2H(D)に変換した重水素変換体も本発明に包含される。
結晶として得られる本発明の化合物およびその医薬上許容される塩には、結晶多形が存在する場合があり、その結晶多形も本発明に包含される。
工程2:得られた粗画分を、0.05Mクエン酸バッファー(pH6.0)(50mL)に懸濁させ、β−グルコシダーゼ(スイートアーモンド由来,東洋紡)(36mg)を加え、45℃で2日間攪拌した。反応液を酢酸エチル(50mL)で3回抽出し、抽出した酢酸エチル層を全て合わせて、水(100mL)で洗浄後、無水硫酸ナトリウムで乾燥して溶媒を減圧留去することで、加水分解物(203mg)を得た。
工程3:得られた加水分解物を、ジクロロメタン(13.5mL)に溶かし、トリプタミン(131mg、0.82mmol)およびトリフルオロメタンスルホン酸ビスマス(III)(54mg、0.082mmol)を加え、室温で24時間攪拌した。反応液に飽和重曹水(30mL)を加え、酢酸エチル(50mL)で3回抽出を行った。抽出した酢酸エチル層を全て合わせて、飽和食塩水(100mL)で洗浄後、無水硫酸ナトリウムで乾燥して減圧濃縮することでインドールアルカロイド型化合物等の化合物を含む多様性拡大抽出物(197mg)を得た。
工程4:得られた多様性拡大抽出物を、シリカゲルカラムクロマトグラフィに付し、ヘキサン−酢酸エチル(4:1)で溶出して画分A(10.4mg)、ヘキサン−酢酸エチル(2:1)で溶出して画分B(16.7mg)、ヘキサン−酢酸エチル(1:1)で溶出して画分C(30.5mg)、ヘキサン−酢酸エチル(1:2)で溶出して画分D(30.9mg)、酢酸エチルで溶出して画分E(57.5mg)をそれぞれ得た。
工程5:画分Bを再度シリカゲルカラムクロマトグラフィに付し、ヘキサン−酢酸エチル(2:1)で溶出した画分より化合物1(2.5mg)を得た。画分Dを再度シリカゲルカラムクロマトグラフィに付し、ヘキサン−酢酸エチル(1:1)で溶出した画分より化合物2(8.4mg)を得た。また、画分Dをヘキサン−酢酸エチル(1:2)で溶出して画分D−1(7.8mg)を得、得られた画分D−1をさらにシリカゲルカラムクロマトグラフィに付し、クロロホルム−メタノール(99:1)で溶出した画分より化合物3(2.5mg)を得た。
化合物1:
1H-NMR (600 MHz, CDCl3) δ 8.05 (1H, br.s), 7.56 (1H, dd, J = 7.9, 1.0 Hz), 7.36 (1H, dd, J = 8.2, 1.0 Hz), 7.35 (1H, s), 7.19 (1H, ddd, J = 8.2, 7.6, 1.0 Hz), 7.12 (1H, ddd, J = 8.2, 7.6, 1.0 Hz), 6.96 (1H, d, J = 2.5 Hz), 4.09-4.12 (1H, m), 3.63 (3H, s), 3.42 (2H, t, J = 7.4 Hz), 3.12 (1H, dd, J = 12.2, 4.7 Hz), 3.04 (1H, td, J = 8.2, 7.4 Hz), 2.98 (2H, dt, J = 7.4, 2.5 Hz), 2.75 (1H, dd, J = 12.2, 6.7 Hz), 2.20 (1H, ddd, J = 14.2, 7.4, 1.5 Hz), 1.87-1.92 (1H, m), 1.66-1.70 (1H, m), 1.56 (1H, ddd, J = 14.2, 8.1, 5.6 Hz), 1.00 (3H, d, J = 7.0 Hz).
13C-NMR (150 MHz, CDCl3) δ 169.3, 145.9, 136.3, 127.1, 122.2, 122.0, 119.5, 118.5, 112.5, 111.3, 99.9, 74.5, 56.2, 50.5, 47.3, 43.1, 42.0, 41.6, 32.4, 25.1, 13.0.
EIMS m/z (rel. int) 354 [M]+ (40), 224 (100), 192 (36).
HREIMS m/z 354.1934 (C21H26O3N2の計算値354.1943).
化合物2:
1H-NMR (600 MHz, CDCl3) δ 8.31 (1H, br.s), 7.45 (1H, d, J = 7.6 Hz), 7.36 (1H, s), 7.32 (1H, d, J = 7.6 Hz), 7.15 (1H, t, J = 7.6 Hz), 7.10 (1H, t, J = 7.6 Hz), 4.39 (1H, brs), 4.24 (1H, t, J = 5.4 Hz), 3.73 (1H, dd, J = 15.8, 5.4 Hz), 3.62 (3H, s), 3.46 (1H, dd, J = 15.8, 5.8 Hz), 2.98 (1H, ddd, J = 9.8, 8.0, 6.7 Hz), 2.90-2.95 (1H, m), 2.77 (1H, dd, J = 15.1, 5.4 Hz), 2.41 (1H, ddd, J = 10.1, 9.8, 2.5 Hz), 2.24 (1H, dd, J = 14.7, 8.0 Hz), 2.05-2.11 (1H, m), 1.80 (1H, ddd, J = 14.7, 6.7, 5.3), 1.20 (3H, d, J = 6.9 Hz).
13C-NMR (150 MHz, CDCl3) δ 168.6, 144.7, 135.8, 133.4, 127.1, 121.9, 119.6, 118.0, 111.0, 108.6, 104.3, 74.5, 52.8, 51.5, 50.6, 44.9, 42.5, 41.5, 30.9, 22.2, 12.8.
EIMS m/z (rel. int) 352 [M]+ (100), 293 (57), 279 (32), 255 (22), 224 (12), 170 (17).
HREIMS m/z 352.1806 (C21H24O3N2の計算値352.1787).
化合物3:
1H-NMR (600 MHz, CDCl3) δ 8.08 (1H, br.s), 7.55 (1H, dd, J = 8.0, 1.0 Hz), 7.35 (1H, dd, J = 8.0, 0.9 Hz), 7.19 (1H, td, J = 8.0, 1.0 Hz), 7.13 (1H, td, J = 8.0, 0.9 Hz), 7.00 (1H, d, J = 2.6 Hz), 6.93 (1H, d, J = 2.6 Hz), 5.42 (1H, br.s), 4.75 (1H, d, J = 2.8 Hz), 4.21 (1H, q, J = 6.5 Hz), 3.92 (1H, dd, J = 12.1, 3.9 Hz), 3.62 (3H, s), 3.38 (2H, t, J = 7.1 Hz), 3.35 (3H, s), 2.98 (2H, t, J = 7.1 Hz), 2.23 (1H, dd, J = 12.7, 3.9 Hz), 1.78 (1H, ddd, J = 12.7, 12.1, 2.8 Hz), 1.05 (3H, d, J = 6.5 Hz).
13C-NMR (150 MHz, CDCl3) δ 168.5, 141.3, 136.3, 127.0, 122.5, 122.2, 121.1, 120.2, 119.6, 118.4, 111.9, 111.3, 99.8, 99.5, 64.6, 54.6, 54.4, 50.7, 39.0, 29.3, 26.2, 16.5.
EIMS m/z (rel. int) 382 [M]+ (23), 351 (13), 323 (32), 144 (100).
HREIMS m/z 382.0962 (C22H26O4N2の計算値382.1893).
得られた多様性拡大抽出物を、シリカゲルカラムクロマトグラフィに付し、ヘキサン−酢酸エチル(3:1)で溶出して画分A(4.3mg)、ヘキサン−酢酸エチル(1:1)で溶出して画分B(17.5mg)、ヘキサン−酢酸エチル(1:3)で溶出して画分C(34.0mg)、ヘキサン−酢酸エチル(1:9)で溶出して画分D(74.3mg)、酢酸エチルで溶出して画分E(285.2mg)をそれぞれ得た。
画分Bをオクタデシルシリル化シリカゲルを担体とするカラムクロマトグラフィーに付し、水−アセトニトリル(3:2)で溶出した画分より化合物4(2.2mg)を得た。また、画分Dをオクタデシルシリル化シリカゲルを担体とするカラムクロマトグラフィーに付し、水−アセトニトリル(1:1)で溶出した画分より化合物5(3.0mg)を、水−アセトニトリル(2:3)で溶出した画分より化合物6(4.4mg)をそれぞれ得た。
化合物4:
1H-NMR (600 MHz, CDCl3) δ 9.99 (1H, br.s), 7.55 (1H, s), 7.45 (1H, d, J = 7.7 Hz), 7.33 (1H, d, J = 8.0 Hz), 7.14 (1H, t, J = 8.0 Hz), 7.08 (1H, dd, J = 8.0, 7.7 Hz), 6.01 (1H, br.s), 4.44 (1H, d, J = 13.0 Hz), 4.34 (1H, d, J = 7.6 Hz), 4.32 (1H, d, J = 13.0 Hz), 3.72 (1H, dd, J = 15.6, 4.2 Hz), 3.67 (3H, s), 3.56 (1H, td, J = 12.3, 4.1 Hz), 3.25 (1H, q, J = 8.0 Hz), 2.91-2.95 (1H, m), 2.88-2.91 (1H, m), 2.87 (1H, dd, J = 8.0, 7.6 Hz), 2.75-2.78 (1H, m), 2.56 (1H, br.s), 2.10 (1H, ddd, J = 16.7, 8.0, 2.1 Hz).
13C-NMR (150 MHz, CDCl3) δ 168.9, 145.3, 144.4, 136.2, 133.4, 133.1, 126.6, 121.8, 119.4, 117.9, 111.3, 108.8, 99.0, 60.9, 54.1, 52.1, 50.6, 47.0, 39.6, 36.8, 22.1.
EIMS m/z (rel. int) 350 [M]+ (100), 319 (26), 291 (26), 279 (50), 170 (39).
HREIMS m/z 350.1619 (C21H22O3N2の計算値350.1630).
化合物5:
1H-NMR (600 MHz, CDCl3) δ 9.58 (1H, br.s), 7.49 (1H, s), 7.46 (1H, d, J = 8.0 Hz), 7.31 (1H, d, J = 8.0 Hz), 7.15 (1H, t, J = 8.0 Hz), 7.08 (1H, t, J = 8.0 Hz), 6.15 (1H, br.s), 4.65 (1H, br.s), 4.37 (1H, d, J = 12.2 Hz), 4.23 (1H, d, J = 12.2 Hz), 3.72 (1H, dd, J = 12.6, 4.7 Hz), 3.63 (3H, s), 3.48 (1H, td, J = 12.6, 4.4 Hz), 2.93-2.99 (3H, m), 2.82 (1H, dd, J = 15.3, 4.4 Hz), 2.15-2.18 (1H, m).
13C-NMR (150 MHz, CDCl3) δ 168.2, 145.9, 144.8, 135.9, 135.7, 130.1, 126.5, 122.0, 119.4, 117.9, 111.2, 110.2, 103.6, 83.3, 58.5, 56.5, 51.4, 50.8, 45.1, 37.7, 21.9.
EIMS m/z (rel. int) 366 [M]+ (100), 335 (21), 305 (20), 255 (86), 169 (36), 144 (44).
HREIMS m/z 366.1586 (C21H22O4N2の計算値366.1580).
化合物6:
1H-NMR (600 MHz, CDCl3) δ 8.04 (1H, br.s), 7.56 (1H, dd, J = 8.1, 0.9 Hz), 7.35 (1H, dd, J = 8.1, 0.8 Hz), 7.30 (1H, s), 7.19 (1H, td, J = 8.1, 0.9 Hz), 7.11 (1H, td, J = 8.1, 0.8 Hz), 6.97 (1H, d, J = 2.2 Hz), 6.10 (1H, dd, J = 5.4, 2.1 Hz), 5.61 (1H, dd, J = 5.4, 2.7 Hz), 4.90 (1H, d, J = 6.9 Hz), 3.82 (1H, d, J = 9.4 Hz), 3.81-3.83 (1H, m), 3.67 (3H, s), 3.60-3.65 (1H, m), 3.59 (1H, d, J = 9.4 Hz), 3.50-3.56 (1H,m), 3.02-3.11 (2H, m), 2.43 (1H, dd, J = 9.1, 6.9 Hz).
13C-NMR (150 MHz, CDCl3) δ 168.5, 142.2, 139.3, 136.3, 131.1, 127.2, 122.2, 122.1, 119.5, 118.6, 112.5, 111.2, 97.4, 94.5, 87.4, 72.3, 54.7, 50.8, 47.4, 39.3, 25.9.
EIMS m/z (rel. int) 366 [M-H2O]+ (50), 236 (100), 206 (240).
HREIMS m/z 366.1596 (C21H24O5N2の計算値366.1580).
得られた多様性拡大抽出物をシリカゲルカラムクロマトグラフィに付し、クロロホルム−メタノール(99:1)で溶出して画分A(243.1mg)、クロロホルム−メタノール(197:3)で溶出して画分B(59.5mg)、クロロホルム−メタノール(49:1)で溶出して画分C(91.7mg)、クロロホルム−メタノール(19:1)で溶出して画分D(59.8mg)、メタノールで溶出して画分E(196.2mg)をそれぞれ得た。
得られた画分Bをオクタデシルシリル化シリカゲルを担体とするカラムクロマトグラフィーに付し、水−アセトニトリル(3:2)で溶出した画分より化合物7(3.5mg)を得た。
1H-NMR (600 MHz, CDCl3) δ 9.61 (1H, s), 8.10 (1H, br.s), 7.55 (1H, s), 7.45 (1H, dd, J = 7.9, 0.9 Hz), 7.34 (1H, dd, J = 8.2, 0.8 Hz), 7.18 (1H, ddd, J = 8.2, 8.0, 0.9 Hz), 7.07 (1H, td, J = 8.0, 0.8 Hz), 6.96 (1H, d, J = 2.0 Hz), 4.79 (1H, q, J = 6.4 Hz), 4.20-4.28 (2H, m), 3.75-3.82 (1H, m), 3.56-3.63 (1H, m), 3.10-3.16 (2H, m), 2.94 (1H, dt, J = 16.4, 4.6 Hz), 2.85 (1H, ddd, J = 16.4, 8.8, 5.4 Hz), 1.13 (3H, d, J = 6.4 Hz).
13C-NMR (150 MHz, CDCl3) δ 184.4, 165.2, 151.9, 147.7, 136.2, 126.9, 122.5, 122.2, 119.7, 118.1, 115.1, 111.4, 110.9, 95.2, 64.8, 56.2, 51.3, 25.0, 23.1, 18.5.
EIMS m/z (rel. int) 336 [M]+ (18), 321 (26), 144 (100), 130 (39).
HREIMS m/z 336.1454 (C20H20O3N2の計算値336.1474).
1H-NMR (600 MHz, CDCl3) δ 8.61 (1H, br.s), 7.34 (1H, s), 7.29 (1H, d, J = 8.5 Hz), 6.81 (1H, d, J = 2.2 Hz), 6.75 (1H, dd, J = 8.5, 2.2 Hz), 4.32 (1H, br.s), 4.20 (1H, t, J = 4.8 Hz), 3.79 (3H, s), 3.66 (1H, dd, J = 13.1, 5.9 Hz), 3.60 (3H, s), 3.40 (1H, ddd, J = 13.1, 12.0, 4.4 Hz), 2.91-2.97 (1H, m), 2.83-2.90 (1H, m), 2.68 (1H, dd, J = 15.2, 4.4 Hz), 2.39 (1H, ddd, J = 9.7, 8.2, 4.0 Hz), 2.23 (1H, ddd, J = 14.7, 7.9, 0.9 Hz), 1.99-2.05 (1H, m), 1.77 (1H, dt, J = 14.7, 5.9 Hz), 1.15 (3H, d, J = 7.0 Hz).
13C-NMR (150 MHz, CDCl3) δ 168.8, 156.2, 144.9, 136.6, 132.2, 121.5, 118.4, 109.0, 108.1, 104.0, 95.2, 74.3, 55.7, 52.8, 51.5, 50.6, 44.7, 42.3, 41.4, 30.8, 22.2, 12.8.
EIMS m/z (rel. int) 382 [M]+ (100), 365 (24), 323 (77), 311 (30), 200 (22).
HREIMS m/z 382.1851 (C22H26O4N2の計算値382.1893).
1H-NMR (600 MHz, CDCl3) δ 8.20 (1H, br.s), 7.32 (1H, d, J = 1.3 Hz), 7.30 (1H, d, J = 8.4 Hz), 7.28 (1H, d, J = 1.8 Hz), 7.04 (1H, dd, J = 8.4, 1.8 Hz), 4.35 (1H, br.s), 4.22 (1H, t, J = 4.6 Hz), 3.71 (1H, dd, J = 13.3, 5.5 Hz), 3.61 (3H, s), 3.43 (1H, ddd, J = 13.3, 11.8, 4.8 Hz), 2.92-2.97 (1H, m), 2.85-2.91 (1H, m), 2.70 (1H, dd, J = 15.3, 4.8 Hz), 2.38 (1H, ddd, J = 9.8, 8.2, 4.0 Hz), 2.22 (1H, ddd, J = 14.8, 7.8, 1.1 Hz), 2.02-2.08 (1H, m), 1.79 (1H, dt, J = 14.8, 5.7 Hz), 1.17 (3H, d, J = 7.1 Hz).
13C-NMR (150 MHz, CDCl3) δ 168.5, 144.4, 136.1, 134.1, 127.7., 125.8, 120.4, 118.8, 111.0, 108.8, 104.8, 74.5, 52.7, 51.3, 50.7, 44.8, 42.5, 41.4, 30.9, 22.0, 12.7.
EIMS m/z (rel. int) 388 [M+2]+ (33), 386 [M]+ (100), 327 (72), 313 (48), 289 (39), 204 (30).
HREIMS m/z 386.1431 (C21H23O3N2 35Clの計算値386.1397).
1H-NMR (600 MHz, CDCl3) δ 8.20 (1H, br.s), 7.33 (1H, s), 7.19 (1H, d, J = 8.8 Hz), 6.87 (1H, d, J = 2.4 Hz), 6.79 (1H, dd, J = 8.8, 2.4 Hz), 4.35 (1H, br.s), 4.20 (1H, t, J = 5.5 Hz), 3.82 (3H, s), 3.70 (1H, dd, J = 13.1, 5.7 Hz), 3.59 (3H, s), 3.43 (1H, ddd, J = 13.1, 12.0, 4.7 Hz), 2.91-2.96 (1H, m), 2.85-2.91 (1H, m), 2.70 (1H, dd, J = 15.1, 4.7 Hz), 2.36 (1H, ddd, J = 9.7, 8.1, 3.8 Hz), 2.18 (1H, ddd, J = 14.7, 8.1, 1.2 Hz), 2.00-2.07 (1H, m), 1.77 (1H, dt, J = 14.7, 5.9 Hz), 1.16 (3H, d, J = 7.0 Hz).
13C-NMR (150 MHz, CDCl3) δ 168.6, 154.2, 144.6, 134.2, 130.9, 127.5, 111.74, 111.73, 108.4, 104.4, 100.2, 74.5, 56.0, 52.9, 51.5, 50.6, 44.8, 42.5, 41.4, 30.9, 22.2, 12.8.
EIMS m/z (rel. int) 382 [M]+ (100), 364 (90), 323 (66), 200 (52), 129 (81).
HREIMS m/z 382.1896 (C22H26O4N2の計算値382.1893).
1H-NMR (600 MHz, CDCl3) δ 8.10 (1H, br.s), 7.34 (1H, s), 7.29 (1H, d, J = 7.8 Hz), 7.01 (1H, t, J = 7.8 Hz), 6.95 (1H, t, J = 7.8 Hz), 4.39 (1H, br.s), 4.22 (1H, t, J = 5.4 Hz), 3.70 (1H, dd, J = 13.1, 6.0 Hz), 3.60 (3H, s), 3.44 (1H, ddd, J = 13.1, 12.0, 4.5 Hz), 2.95-3.00 (1H, m), 2.88-2.95 (1H, m), 2.74 (1H, dd, J = 14.5, 5.6 Hz), 2.47 (3H, s), 2.40-2.44 (1H, m), 2.23 (1H, ddd, J = 14.8, 8.2, 0.9 Hz), 2.02-2.10 (1H, m), 1.78 (1H, dt, J = 14.8, 5.4 Hz), 1.20 (3H, d, J = 7.0 Hz).
13C-NMR (150 MHz, CDCl3) δ 168.6, 144.7, 135.3, 133.0, 126.6, 122.6, 120.3, 119.9, 115.6, 109.1, 104.3, 74.5, 52.9, 51.5, 50.6, 44.7, 42.5, 41.6, 31.0, 22.3, 16.8, 12.7.
EIMS m/z (rel. int) 366 [M]+ (100), 348 (41), 305 (80), 293 (91).
HREIMS m/z 366.1968 (C22H26O3N2の計算値366.1943).
1H-NMR (600 MHz, CDCl3) δ 8.09 (1H, br.s), 7.38 (1H, d, J = 1.9 Hz), 7.31 (1H, d, J = 1.0 Hz), 7.20 (1H, d, J = 8.6 Hz), 7.08 (1H, dd, J = 8.6, 1.9 Hz), 4.37 (1H, br.s), 4.22 (1H, t, J = 5.2 Hz), 3.71 (1H, dd, J = 13.3, 6.7 Hz), 3.60 (3H, s), 3.42 (1H, ddd, J = 13.3, 11.9, 4.6 Hz), 2.92-2.97 (1H, m), 2.84-2.90 (1H, m), 2.74 (1H, dd, J = 15.4, 4.6 Hz), 2.36 (1H, ddd, J = 9.7, 8.1, 3.7 Hz), 2.23 (1H, ddd, J = 14.8, 8.0, 1.2 Hz), 2.01-2.08 (1H, m), 1.79 (1H, dt, J = 14.8, 5.2 Hz), 1.17 (3H, d, J = 7.0 Hz).
13C-NMR (150 MHz, CDCl3) δ 168.4, 144.3, 134.9, 134.1, 128.3, 125.5, 122.2, 117.7, 111.9, 108.5, 104.9, 74.5, 52.7, 51.3, 50.7, 44.8, 42.5, 41.4, 30.8, 22.0, 12.7.
EIMS m/z (rel. int) 388 [M+2]+ (22), 386 [M]+ (99), 368 (69), 327 (71), 313 (100), 289 (68), 204 (71).
HREIMS m/z 386.1369 (C21H23O3N2 35Clの計算値386.1397).
1H-NMR (600 MHz, CDCl3) δ 8.05 (1H, br.s), 7.55 (1H, d, J = 1.8 Hz), 7.31 (1H, s), 7.22 (1H, dd, J = 8.5, 1.8 Hz), 7.17 (1H, d, J = 8.5 Hz), 4.37 (1H, br.s), 4.22 (1H, t, J = 5.1 Hz), 3.71 (1H, dd, J = 13.3, 5.8 Hz), 3.60 (3H, s), 3.42 (1H, ddd, J = 13.3, 12.0, 4.6 Hz), 2.92-2.98 (1H, m), 2.84-2.90 (1H, m), 2.74 (1H, dd, J = 15.4, 4.6 Hz), 2.36 (1H, ddd, J = 9.9, 8.3, 3.7 Hz), 2.21 (1H, ddd, J = 14.8, 8.1, 0.9 Hz), 2.02-2.09 (1H, m), 1.79 (1H, dt, J = 14.8, 5.1 Hz), 1.17 (3H, d, J = 7.0 Hz).
13C-NMR (150 MHz, CDCl3) δ 168.4, 144.3, 134.8, 134.4, 129.0, 124.7, 120.8, 113.0, 112.4, 108.5, 104.9, 74.4, 52.7, 51.3, 50.7, 44.8, 42.5, 41.4, 30.8, 22.0, 12.7.
EIMS m/z (rel. int) 432 [M+2]+ (72), 430 [M]+ (100), 371 (90), 359 (95), 333 (56), 248 (50).
HREIMS m/z 430.0885 (C21H23O3N2 79Brの計算値430.0892).
1H-NMR (600 MHz, CDCl3) δ 8.15 (1H, br.d), 7.33 (1H, d, J = 0.9 Hz), 7.22 (1H, d, J = 1.1 Hz), 7.19 (1H, d, J = 8.3 Hz), 6.95 (1H, dd, J = 8.3, 1.1 Hz), 4.35 (1H, br.s), 4.21 (1H, t, J = 4.7 Hz), 3.69 (1H, dd, J = 12.9, 5.9 Hz), 3.59 (3H, s), 3.43 (1H, ddd, J = 12.9, 11.9, 4.7 Hz), 2.92-2.97 (1H, m), 2.85-2.92 (1H, m), 2.71 (1H, dd, J = 15.2, 4.7 Hz), 2.41 (3H, s), 2.31-2.37 (1H, m), 2.20 (1H, ddd, J = 14.7, 7.8, 1.1 Hz), 2.01-2.09 (1H, m), 1.76 (1H, dt, J = 14.7, 5.6 Hz), 1.17 (3H, d, J = 7.0 Hz).
13C-NMR (150 MHz, CDCl3) δ 168.6, 144.7, 134.1, 133.5, 128.9, 127.3, 123.4, 117.7, 110.7, 108.1, 104.2, 74.4, 52.9, 51.5, 50.6, 44.9, 42.5, 41.5, 31.0, 22.2, 21.4, 14.2, 12.8.
EIMS m/z (rel. int) 366 [M]+ (100), 307 (55), 295 (35), 269 (21), 184 (15).
HREIMS m/z 366.1956 (C22H26O3N2の計算値366.1943).
1H-NMR (600 MHz, CDCl3) δ 8.20 (1H, br.s), 7.45 (2H, dd, J = 7.3, 1.1 Hz), 7.36 (2H, t, J = 7.3 Hz), 7.33 (1H, d, J = 1.0 Hz), 7.29 (1H, t, J = 7.3 Hz), 7.20 (1H, d, J = 8.7 Hz), 6.97 (1H, d, J = 2.3 Hz), 6.87 (1H, dd, J = 8.7, 2.3 Hz), 5.07 (2H, s), 4.35 (1H, br.s), 4.20 (1H, t, J = 5.0 Hz), 3.69 (1H, dd, J = 12.9, 5.8 Hz), 3.60 (3H, s), 3.43 (1H, td, J = 12.9, 4.5 Hz), 2.92-2.97 (1H, m), 2.83-2.90 (1H, m), 2.71 (1H, dd, J = 15.3, 4.5 Hz), 2.33-2.38 (1H, m), 2.19 (1H, ddd, J = 14.7, 9.0, 1.2 Hz), 2.00-2.08 (1H, m), 1.78 (1H, dt, J = 14.7, 5.8 Hz), 1.16 (3H, d, J = 6.9 Hz).
13C-NMR (150 MHz, CDCl3) δ 168.6, 153.4, 144.6, 137.6, 134.3, 131.1, 128.5 (2C), 127.7, 127.5 (3C), 112.4, 111.7, 108.4, 104.3, 101.9, 74.4, 71.0, 52.9, 51.5, 50.6, 44.8, 42.5, 41.5, 30.9, 22.2, 12.8.
EIMS m/z (rel. int) 458 [M]+ (100), 440 (54), 399 (52), 367 (79).
HREIMS m/z 458.2194 (C28H30O4N2の計算値458.2206).
1H-NMR (600 MHz, CD3OD) δ 7.45 (1H, d, J = 0.6 Hz), 7.15 (1H, d, J = 8.7 Hz), 6.76 (1H, d, J = 2.1 Hz), 6.62 (1H, dd, J = 8.7, 2.1 Hz), 4.42 (1H, br.s), 4.15 (1H, td, J = 5.5, 2.2 Hz), 3.77 (1H, dd, J = 12.8, 6.0 Hz), 3.60 (3H, s), 3.47 (1H, td, J = 12.8, 4.2 Hz), 2.87-2.91 (1H, m), 2.77-2.85 (1H, m), 2.66 (1H, dd, J = 15.0, 4.2 Hz), 2.36 (1H, ddd, J = 9.5, 8.0, 4.1 Hz), 2.14 (1H, ddd, J = 14.3, 7.7, 2.2 Hz), 2.06-2.11 (1H, m), 1.80 (1H, dt, J = 14.3, 5.8 Hz), 1.14 (3H, d, J = 7.0 Hz).
13C-NMR (150 MHz, CD3OD) δ 171.0, 151.4, 147.1, 135.8, 132.8, 129.1, 112.5, 112.0, 108.1, 104.4, 103.0, 74.7, 54.7, 52.7, 51.1, 46.8, 43.1, 42.4, 32.3, 23.5, 13.4.
EIMS m/z (rel. int) 368 [M]+ (100), 351 (15), 309 (48), 297 (27), 271 (18), 186 (11).
HREIMS m/z 368.1753 (C21H24O4N2の計算値368.1736).
1H-NMR (600 MHz, CDCl3) δ 8.50 (1H, br.d), 7.32 (1H, s), 7.31 (1H, dd, J = 8.6, 5.1 Hz), 6.99 (1H, dd, J = 7.6, 2.1 Hz), 6.82 (1H, ddd, J = 8.6, 7.3, 2.1 Hz), 4.35 (1H, br.s), 4.21 (1H, t, J = 4.9 Hz), 3.70 (1H, dd, J = 12.9, 5.9 Hz), 3.59 (3H, s), 3.43 (1H, td, J = 12.9, 4.5 Hz), 2.91-2.96 (1H, m), 2.84-2.91 (1H, m), 2.70 (1H, dd, J = 15.3, 4.5 Hz), 2.40 (1H, td, J = 9.5, 3.5 Hz), 2.20 (1H, ddd, J = 14.7, 8.0 Hz), 1.99-2.05 (1H, m), 1.77 (1H, dt, J = 14.7, 5.7 Hz), 1.15 (3H, d, J = 6.8 Hz).
13C-NMR (150 MHz, CDCl3) δ 168.6, 159.8 (d, J = 237.3 Hz), 144.6, 135.8 (d, J = 12.2 Hz), 133.6 (d, J = 2.9 Hz), 123.7, 118.5 (d, J = 10.0 Hz), 108.5, 108.1 (d, J = 24.4 Hz), 104.6, 97.5 (d, J = 25.8 Hz), 74.5, 52.7, 51.4, 50.7, 44.7, 42.4, 41.4, 30.8, 22.1, 12.7.
EIMS m/z (rel. int) 370 [M]+ (100), 311 (76), 297 (53), 273 (35), 188 (40).
HREIMS m/z 370.1685 (C21H23O3N2Fの計算値370.1693).
以下に、本発明の実施例化合物についての薬理試験方法およびその結果を示す。
[実験材料]
(1)細胞
ヒト成人T細胞白血病由来MT2細胞を使用した。ヒト成人T細胞白血病(ATL)の白血病細胞はCD4分子およびCD25分子を細胞表面に発現しており、Treg由来であると考えられている(Chen S. et al., International Immunology 18:269-277 (2005))。MT2細胞はATL由来の細胞で、CD4陽性、CD25陽性、FOXP3陽性細胞であることからTregのモデルとして実験に使用した。
(2)被験試料
本発明の実施例化合物(化合物1〜17)をジメチルスルホキシド(DMSO)によって50mmol/L溶液とし、−80℃で保存した。
本発明の実施例化合物のIL−10産生抑制効果を評価するために、以下の手順に従って、対照および実施例化合物におけるIL−10産生量を測定した。
(1)MT2細胞を10%ウシ胎児血清(FCS)および1%ペニシリン・ストレプトマイシン(P/S)を添加したRPMI1640培地(培地)に3×105細胞/mLとなるよう懸濁し、24ウェルプレートの各ウェルに1mLずつ分注、播種した。これに、被験試料(化合物1〜7)を培地で50倍希釈した希釈液20μLまたは10μL加えて、炭酸ガス培養器(37℃、5%CO2条件下)で48±2時間培養した。また、被験試料(化合物8〜17)を培地で50倍希釈した希釈液25.0μLまたは12.5μL加えて、炭酸ガス培養器(37℃、5%CO2条件下)で48±2時間培養した。化合物1〜7の対照として、DMSOを培地で50倍希釈したものを20μL加えた。また、化合物8〜17の対照として、DMSOを培地で50倍希釈したものを25.0μL加えた。
(2)細胞培養液の一部を採取し、セルカウンター(BIO RAD TC−20)で細胞を計数した。細胞培養液を300×gで5分間遠心分離し、上清をIL−10測定用試料として採取した。当日測定しない場合には−80℃のフリーザーで保存した。
(3)測定には、Human IL-10 ELISA kit II (BD OptEIA)を使用した。キットには抗IL−10抗体処理済ウェル(8ウェル/ストリップ)、Standard/Sample diluent、凍結乾燥のIL-10 Standard含有バイアル(1280pg/バイアル)、ELISA diluent、20 x Washi Buffer、Detection antibody、Enzyme Concentrate、TMB One Step Substrate Reagent、Stop Solution、カバーシートが含まれている。
(4)IL-10 Standard含有バイアルに、2.3mL Standard/Sample diluentを加え、15分間室温放置後に溶解した(標準試料原液IL−10濃度:500pg/mL)。
(5)検量線用の各濃度の標準試料を以下のように調製した。最初に300μLの培地に標準試料原液を300μL加え、ボルテックスミキサー(voltex mixer)で混合した(250pg/mL)。次に250pg/mLの標準試料300μLを300μLの培地に加え、ボルテックスミキサーで混合した(125pg/mL)。同様の操作を順次繰り返し、62.5、31.25、15.625、7.8125pg/mLの濃度の標準試料を調製した。0pg/mLには培地を使用した。
(6)キットの抗IL−10抗体処理ウェル(8ウェルが1ストリップ)を室温に戻し、各ウェルにキットに含まれるELISA diluentを50μLずつ加えた。
(7)ELISA diluentの入った各ウェルに、各濃度の標準試料および被験試料(培地で50−100倍希釈)を100μLずつウェルに添加した。
(8)ウェルにカバーシールを貼り、軽くタッピング後に2時間室温放置した。
(9)20 x Wash Bufferを水で20倍希釈し、1 x Wash Bufferを調製した。
(10)2時間の反応後、ウェルの中の溶液をアスピレーションし、300μLの1 x Wash Bufferで5回洗浄した。
(11)Enzyme Concentreat(8ウェル当たり4μL)をDetection antibody(8ウェル当たり1mL)に加えた後、ボルテックスミキサーで混合し、必要量のWorking Detectorを調製した。
(12)Working Detectorを各ウェルに100μLずつ加え、カバーシートをし、1時間室温放置した。
(13)1時間の反応後、ウェルの中の溶液をアスピレーションし、300μLの1 x Wash Bufferで7回洗浄した。
(14)100μLのTMB One Step Substrate Reagentを加え、暗所に30分間放置した。
(15)50μLのStop solutionを加え、30分以内に570nmにおける吸光度をバックグランドとして差し引いた470nmにおける吸光度をマイクロプレートリーダー(Thermo Scientific;Varioskan Flash)で測定した。
(16)吸光値より、Microsoft Excel 2013を使用し、各濃度の標準試料の吸光値から回帰直線を求め(検量線)、検量線から対照及び各化合物処置検体の値を求めた。実験はn=3で行ったので、各群の値は平均値と標準偏差値を示した。
試験例1においてIL−10阻害活性を示す上記化合物のうち、特に優れた阻害活性を有する化合物1、2、4および8〜17について、以下の手順にしたがって、CTLA−4の発現量を測定し、免疫チェックポイント阻害活性を評価した。
(1)MT2細胞を10%ウシ胎児血清(FCS)および1%ペニシリン・ストレプトマイシン(P/S)を添加したRPMI1640培地(以下、培地)に3x105細胞/mLとなるよう懸濁し、6ウェルプレートの各ウェルに3mLずつ分注、播種した。これに試験化合物(化合物1、2および4)溶液を0.6μLまたは1.2μL、試験化合物(化合物9)溶液を0.75μLまたは1.5μL、そして、試験化合物(化合物8および10〜17)溶液を1.5μL加えて、炭酸ガス培養器(37℃、5%CO2条件下)で48±2時間培養した。化合物1、2および4の対照として、DMSOのみを1.2μL加えた。また、化合物8〜17の対照として、DMSOのみを1.5μL加えた。
(2)細胞培養液の一部を採取し、セルカウンター(BIO RAD TC−20)で細胞を計数した。細胞培養液を300xgで5分間遠心分離し、上清を除去した。細胞濃度が5〜10x106細胞/mLとなるように1%ウシ血清アルブミン(BSA)添加カルシウム・マグネシウム不含リン酸緩衝生理的食塩液(1%BSA/PBS)で懸濁した。
(3)5mLチューブに、細胞懸濁液を各50μL加えた。
(4)FOXP3/Transcription Factor Staining kit (TONBO biosciences)に含まれるFoxp3/Transcription Factor Fix/Perm Concentrate(4X)(Cat. No. TNB-1020-L050)(A液)をFoxp3/Transcription Factor Fix/Perm Diluent (1X)(Cat. No. TNB-1022-L160)(A希釈用液)で希釈し、1×A液を調製した。
(5)1×A液を各チューブに1mLずつ加え、軽くピペッティングして撹拌した。続いて、室温で30分間放置し、300xgで5分間遠心分離し、上清を捨てた。
(6)キットに含まれるFlow Cytometry Perm Buffer (10X)(Cat. No. TNB-1213-L150)(B液)を水で10倍希釈し、1×B液を調製した。
(7)1×B液を2mL加え、300xgで5分間遠心分離した。上清を捨て、2%正常マウス血清/PBSを2μL加え、軽くピペッティングした。続いて、室温で15分間静置した。
(8)CTLA−4測定では、抗CTLA−4抗体(BECKMAN COULTER, CD152-PE clone BN13I M2282)または対照としてマウスIgG2a(BECKMAN COULTER, IgG2a(Mouse)-PE A09142)を20μL加え、軽く撹拌した。続いて、室温・暗所で30分間放置し、1×B液を2mL加え、300xgで5分間遠心分離し、上清を捨てた。再度、1×B液を2mL加え、300xgで5分間遠心分離し、上清を捨てた。
(9)該溶液を0.5mLの1%BSA/PBSに懸濁させ、フローサイトメーター(ソニー:Cell Sorter SH800)を用いて、励起波長488nmで575nmの蛍光を2時間以内に測定した。結果は、ソフトウエアのFlowJo(Tree Star Inc.)で解析した。測定した蛍光の強度と細胞数のヒストグラムからCTLA−4のピーク中間蛍光値(MFI)とアイソタイプコントロールのIgG2aのピーク中間蛍光値を求め、CTLA−4の中間蛍光値からIgG2aの中間蛍光値を際し引いた。実験はn=3で行い、平均値を示した。
Claims (15)
- 式(I):
a〜c:
環Aは、以下:
R1、R1’、R2 およびR2’ は、水素であり;
R 3 は、水素またはC 1−3 アルキルであり;
R4は、水素、C1−6アルキルまたはC1−6アルコキシであり;
R 5 およびR 6 は、水素であり;
R 7 は、水素またはヒドロキシであり;
R8は、各々独立して、水素、ハロゲン、ヒドロキシ、C1−6アルキル、C1−6アルコキシまたはベンジルオキシであり;および
nは、1〜4である]
で示される化合物またはその医薬的に許容される塩。 - 請求項1記載の化合物またはその医薬的に許容される塩、ただし、点線aが二重結合を表す化合物は除く。
- R4が、水素またはC 1−3 アルコキシである、請求項1または2に記載の化合物またはその医薬的に許容される塩。
- R8が、各々独立して、水素、ハロゲン、ヒドロキシ、メチル、メトキシまたはベンジルオキシである、請求項1〜3のいずれか一項に記載の化合物またはその医薬的に許容される塩。
- R3が、水素またはメチルである、請求項1〜5のいずれか一項に記載の化合物またはその医薬的に許容される塩。
- 請求項1〜9のいずれか一項に記載の化合物またはその医薬的に許容される塩、および医薬的に許容される担体を含む、医薬組成物。
- 請求項1〜9のいずれか一項に記載の化合物またはその医薬的に許容される塩を有効成分とする、がんの治療剤。
- がんが、悪性黒色腫、神経膠芽腫、肺癌、胃癌、大腸癌、肝臓癌、膵臓癌、腎臓癌、副腎癌、胆道癌、食道癌、咽頭癌、喉頭癌、口腔癌、膀胱癌、舌癌、甲状腺癌、皮膚癌、乳癌、前立腺癌、精巣癌、子宮癌、子宮頸癌、卵巣癌、骨肉腫、軟骨肉腫、横紋筋肉腫、平滑筋肉腫、成人T細胞白血病を含む白血病、悪性リンパ腫または多発性骨髄腫である、請求項11に記載の治療剤。
- 請求項1〜9のいずれか一項に記載の化合物またはその医薬的に許容される塩を有効成分として含む、免疫チェックポイント阻害剤。
- 免疫チェックポイントが、CTLA−4である、請求項13に記載の阻害剤。
- 請求項1〜9のいずれか一項に記載の化合物またはその医薬的に許容される塩を有効成分とする、ワクチンの補助剤(アジュバント)。
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