JP7392031B2 - ペプチドエポキシケトン免疫プロテアソーム阻害剤、およびその前駆体の調製プロセス - Google Patents
ペプチドエポキシケトン免疫プロテアソーム阻害剤、およびその前駆体の調製プロセス Download PDFInfo
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- JP7392031B2 JP7392031B2 JP2022071492A JP2022071492A JP7392031B2 JP 7392031 B2 JP7392031 B2 JP 7392031B2 JP 2022071492 A JP2022071492 A JP 2022071492A JP 2022071492 A JP2022071492 A JP 2022071492A JP 7392031 B2 JP7392031 B2 JP 7392031B2
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- 239000000758 substrate Substances 0.000 description 2
- 230000020382 suppression by virus of host antigen processing and presentation of peptide antigen via MHC class I Effects 0.000 description 2
- 230000001810 trypsinlike Effects 0.000 description 2
- JFALSRSLKYAFGM-UHFFFAOYSA-N uranium(0) Chemical compound [U] JFALSRSLKYAFGM-UHFFFAOYSA-N 0.000 description 2
- ZCANDMMZIHRQCE-AFAVFJNCSA-N (2S,3R)-3-hydroxy-3-(4-methoxyphenyl)-2-[[(2S)-2-[(2-morpholin-4-ylacetyl)amino]propanoyl]amino]propanoic acid Chemical compound COc1ccc(cc1)[C@@H](O)[C@H](NC(=O)[C@H](C)NC(=O)CN1CCOCC1)C(O)=O ZCANDMMZIHRQCE-AFAVFJNCSA-N 0.000 description 1
- YAXWOADCWUUUNX-UHFFFAOYSA-N 1,2,2,3-tetramethylpiperidine Chemical compound CC1CCCN(C)C1(C)C YAXWOADCWUUUNX-UHFFFAOYSA-N 0.000 description 1
- BDNKZNFMNDZQMI-UHFFFAOYSA-N 1,3-diisopropylcarbodiimide Chemical compound CC(C)N=C=NC(C)C BDNKZNFMNDZQMI-UHFFFAOYSA-N 0.000 description 1
- RYHBNJHYFVUHQT-UHFFFAOYSA-N 1,4-Dioxane Chemical compound C1COCCO1 RYHBNJHYFVUHQT-UHFFFAOYSA-N 0.000 description 1
- PAMIQIKDUOTOBW-UHFFFAOYSA-N 1-methylpiperidine Chemical compound CN1CCCCC1 PAMIQIKDUOTOBW-UHFFFAOYSA-N 0.000 description 1
- JVSFQJZRHXAUGT-UHFFFAOYSA-N 2,2-dimethylpropanoyl chloride Chemical compound CC(C)(C)C(Cl)=O JVSFQJZRHXAUGT-UHFFFAOYSA-N 0.000 description 1
- UKRQMDIFLKHCRO-UHFFFAOYSA-N 2,4,6-trimethylbenzoyl chloride Chemical compound CC1=CC(C)=C(C(Cl)=O)C(C)=C1 UKRQMDIFLKHCRO-UHFFFAOYSA-N 0.000 description 1
- LBLYYCQCTBFVLH-UHFFFAOYSA-N 2-Methylbenzenesulfonic acid Chemical compound CC1=CC=CC=C1S(O)(=O)=O LBLYYCQCTBFVLH-UHFFFAOYSA-N 0.000 description 1
- YOETUEMZNOLGDB-UHFFFAOYSA-N 2-methylpropyl carbonochloridate Chemical compound CC(C)COC(Cl)=O YOETUEMZNOLGDB-UHFFFAOYSA-N 0.000 description 1
- FPQQSJJWHUJYPU-UHFFFAOYSA-N 3-(dimethylamino)propyliminomethylidene-ethylazanium;chloride Chemical compound Cl.CCN=C=NCCCN(C)C FPQQSJJWHUJYPU-UHFFFAOYSA-N 0.000 description 1
- PQGCEDQWHSBAJP-TXICZTDVSA-N 5-O-phosphono-alpha-D-ribofuranosyl diphosphate Chemical compound O[C@H]1[C@@H](O)[C@@H](O[P@](O)(=O)OP(O)(O)=O)O[C@@H]1COP(O)(O)=O PQGCEDQWHSBAJP-TXICZTDVSA-N 0.000 description 1
- 108010023546 Aspartylglucosylaminase Proteins 0.000 description 1
- ZAWSQBRDUQPUES-OZGRPGILSA-N C(N)(O[C@H](C(=O)[C@@]1(OC1)C)C(C1=CCCC1)C(C)(C)C)=O Chemical compound C(N)(O[C@H](C(=O)[C@@]1(OC1)C)C(C1=CCCC1)C(C)(C)C)=O ZAWSQBRDUQPUES-OZGRPGILSA-N 0.000 description 1
- 102000008949 Histocompatibility Antigens Class I Human genes 0.000 description 1
- 108010088652 Histocompatibility Antigens Class I Proteins 0.000 description 1
- 101001124792 Homo sapiens Proteasome subunit beta type-10 Proteins 0.000 description 1
- 101001136986 Homo sapiens Proteasome subunit beta type-8 Proteins 0.000 description 1
- 101001136981 Homo sapiens Proteasome subunit beta type-9 Proteins 0.000 description 1
- 102000004157 Hydrolases Human genes 0.000 description 1
- 108090000604 Hydrolases Proteins 0.000 description 1
- 102000008070 Interferon-gamma Human genes 0.000 description 1
- 108010074328 Interferon-gamma Proteins 0.000 description 1
- 102000014150 Interferons Human genes 0.000 description 1
- 108010050904 Interferons Proteins 0.000 description 1
- 102100021003 N(4)-(beta-N-acetylglucosaminyl)-L-asparaginase Human genes 0.000 description 1
- LKJPYSCBVHEWIU-UHFFFAOYSA-N N-[4-cyano-3-(trifluoromethyl)phenyl]-3-[(4-fluorophenyl)sulfonyl]-2-hydroxy-2-methylpropanamide Chemical compound C=1C=C(C#N)C(C(F)(F)F)=CC=1NC(=O)C(O)(C)CS(=O)(=O)C1=CC=C(F)C=C1 LKJPYSCBVHEWIU-UHFFFAOYSA-N 0.000 description 1
- 125000000729 N-terminal amino-acid group Chemical group 0.000 description 1
- 239000007832 Na2SO4 Substances 0.000 description 1
- 101800000628 PDH precursor-related peptide Proteins 0.000 description 1
- 102000035195 Peptidases Human genes 0.000 description 1
- 108091005804 Peptidases Proteins 0.000 description 1
- 239000004365 Protease Substances 0.000 description 1
- 102100029081 Proteasome subunit beta type-10 Human genes 0.000 description 1
- 102100035760 Proteasome subunit beta type-8 Human genes 0.000 description 1
- 102100035764 Proteasome subunit beta type-9 Human genes 0.000 description 1
- 240000004808 Saccharomyces cerevisiae Species 0.000 description 1
- 108010005705 Ubiquitinated Proteins Proteins 0.000 description 1
- 241000251539 Vertebrata <Metazoa> Species 0.000 description 1
- RGVAKJRBYKYMKT-IDVLALEDSA-N [Cl-].C(C1=CC=CC=C1)OC([C@H]([C@@H](C1=CC=C(C=C1)OC)O)[NH3+])=O Chemical compound [Cl-].C(C1=CC=CC=C1)OC([C@H]([C@@H](C1=CC=C(C=C1)OC)O)[NH3+])=O RGVAKJRBYKYMKT-IDVLALEDSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000002730 additional effect Effects 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 150000001408 amides Chemical class 0.000 description 1
- 125000003277 amino group Chemical group 0.000 description 1
- 230000006907 apoptotic process Effects 0.000 description 1
- 230000001580 bacterial effect Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- BGMFZOOEIPFHRO-GKVQRAMASA-N benzyl (2S,3R)-3-hydroxy-3-(4-methoxyphenyl)-2-[[(2S)-2-[(2-morpholin-4-ylacetyl)amino]propanoyl]amino]propanoate Chemical compound COc1ccc(cc1)[C@@H](O)[C@H](NC(=O)[C@H](C)NC(=O)CN1CCOCC1)C(=O)OCc1ccccc1 BGMFZOOEIPFHRO-GKVQRAMASA-N 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000012455 biphasic mixture Substances 0.000 description 1
- 150000005693 branched-chain amino acids Chemical class 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 150000001732 carboxylic acid derivatives Chemical class 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000010261 cell growth Effects 0.000 description 1
- 238000003776 cleavage reaction Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 125000004177 diethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 1
- RIFGWPKJUGCATF-UHFFFAOYSA-N ethyl chloroformate Chemical compound CCOC(Cl)=O RIFGWPKJUGCATF-UHFFFAOYSA-N 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 229940044627 gamma-interferon Drugs 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000008571 general function Effects 0.000 description 1
- ZDXPYRJPNDTMRX-UHFFFAOYSA-N glutamine Natural products OC(=O)C(N)CCC(N)=O ZDXPYRJPNDTMRX-UHFFFAOYSA-N 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000011874 heated mixture Substances 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 125000001165 hydrophobic group Chemical group 0.000 description 1
- 229940079322 interferon Drugs 0.000 description 1
- 230000003834 intracellular effect Effects 0.000 description 1
- 125000001449 isopropyl group Chemical group [H]C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 1
- 229940098779 methanesulfonic acid Drugs 0.000 description 1
- 125000000325 methylidene group Chemical group [H]C([H])=* 0.000 description 1
- 230000035772 mutation Effects 0.000 description 1
- UPXAZUFKXWLNMF-UHFFFAOYSA-N n'-propan-2-ylmethanediimine Chemical compound CC(C)N=C=N UPXAZUFKXWLNMF-UHFFFAOYSA-N 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 230000037361 pathway Effects 0.000 description 1
- 229960004838 phosphoric acid Drugs 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920001184 polypeptide Polymers 0.000 description 1
- 230000034190 positive regulation of NF-kappaB transcription factor activity Effects 0.000 description 1
- 230000000770 proinflammatory effect Effects 0.000 description 1
- 239000001294 propane Substances 0.000 description 1
- 230000004844 protein turnover Effects 0.000 description 1
- 230000017854 proteolysis Effects 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 238000006722 reduction reaction Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 230000007017 scission Effects 0.000 description 1
- 229940032330 sulfuric acid Drugs 0.000 description 1
- 238000010189 synthetic method Methods 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
- 125000000341 threoninyl group Chemical group [H]OC([H])(C([H])([H])[H])C([H])(N([H])[H])C(*)=O 0.000 description 1
- 125000005490 tosylate group Chemical group 0.000 description 1
- 238000002424 x-ray crystallography Methods 0.000 description 1
Classifications
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- C07D—HETEROCYCLIC COMPOUNDS
- C07D295/00—Heterocyclic compounds containing polymethylene-imine rings with at least five ring members, 3-azabicyclo [3.2.2] nonane, piperazine, morpholine or thiomorpholine rings, having only hydrogen atoms directly attached to the ring carbon atoms
- C07D295/04—Heterocyclic compounds containing polymethylene-imine rings with at least five ring members, 3-azabicyclo [3.2.2] nonane, piperazine, morpholine or thiomorpholine rings, having only hydrogen atoms directly attached to the ring carbon atoms with substituted hydrocarbon radicals attached to ring nitrogen atoms
- C07D295/12—Heterocyclic compounds containing polymethylene-imine rings with at least five ring members, 3-azabicyclo [3.2.2] nonane, piperazine, morpholine or thiomorpholine rings, having only hydrogen atoms directly attached to the ring carbon atoms with substituted hydrocarbon radicals attached to ring nitrogen atoms substituted by singly or doubly bound nitrogen atoms
- C07D295/125—Heterocyclic compounds containing polymethylene-imine rings with at least five ring members, 3-azabicyclo [3.2.2] nonane, piperazine, morpholine or thiomorpholine rings, having only hydrogen atoms directly attached to the ring carbon atoms with substituted hydrocarbon radicals attached to ring nitrogen atoms substituted by singly or doubly bound nitrogen atoms with the ring nitrogen atoms and the substituent nitrogen atoms attached to the same carbon chain, which is not interrupted by carbocyclic rings
- C07D295/13—Heterocyclic compounds containing polymethylene-imine rings with at least five ring members, 3-azabicyclo [3.2.2] nonane, piperazine, morpholine or thiomorpholine rings, having only hydrogen atoms directly attached to the ring carbon atoms with substituted hydrocarbon radicals attached to ring nitrogen atoms substituted by singly or doubly bound nitrogen atoms with the ring nitrogen atoms and the substituent nitrogen atoms attached to the same carbon chain, which is not interrupted by carbocyclic rings to an acyclic saturated chain
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- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C229/00—Compounds containing amino and carboxyl groups bound to the same carbon skeleton
- C07C229/02—Compounds containing amino and carboxyl groups bound to the same carbon skeleton having amino and carboxyl groups bound to acyclic carbon atoms of the same carbon skeleton
- C07C229/34—Compounds containing amino and carboxyl groups bound to the same carbon skeleton having amino and carboxyl groups bound to acyclic carbon atoms of the same carbon skeleton the carbon skeleton containing six-membered aromatic rings
- C07C229/36—Compounds containing amino and carboxyl groups bound to the same carbon skeleton having amino and carboxyl groups bound to acyclic carbon atoms of the same carbon skeleton the carbon skeleton containing six-membered aromatic rings with at least one amino group and one carboxyl group bound to the same carbon atom of the carbon skeleton
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- C07D—HETEROCYCLIC COMPOUNDS
- C07D413/00—Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and oxygen atoms as the only ring hetero atoms
- C07D413/02—Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and oxygen atoms as the only ring hetero atoms containing two hetero rings
- C07D413/12—Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and oxygen atoms as the only ring hetero atoms containing two hetero rings linked by a chain containing hetero atoms as chain links
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D295/00—Heterocyclic compounds containing polymethylene-imine rings with at least five ring members, 3-azabicyclo [3.2.2] nonane, piperazine, morpholine or thiomorpholine rings, having only hydrogen atoms directly attached to the ring carbon atoms
- C07D295/04—Heterocyclic compounds containing polymethylene-imine rings with at least five ring members, 3-azabicyclo [3.2.2] nonane, piperazine, morpholine or thiomorpholine rings, having only hydrogen atoms directly attached to the ring carbon atoms with substituted hydrocarbon radicals attached to ring nitrogen atoms
- C07D295/14—Heterocyclic compounds containing polymethylene-imine rings with at least five ring members, 3-azabicyclo [3.2.2] nonane, piperazine, morpholine or thiomorpholine rings, having only hydrogen atoms directly attached to the ring carbon atoms with substituted hydrocarbon radicals attached to ring nitrogen atoms substituted by carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals
- C07D295/145—Heterocyclic compounds containing polymethylene-imine rings with at least five ring members, 3-azabicyclo [3.2.2] nonane, piperazine, morpholine or thiomorpholine rings, having only hydrogen atoms directly attached to the ring carbon atoms with substituted hydrocarbon radicals attached to ring nitrogen atoms substituted by carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals with the ring nitrogen atoms and the carbon atoms with three bonds to hetero atoms attached to the same carbon chain, which is not interrupted by carbocyclic rings
- C07D295/15—Heterocyclic compounds containing polymethylene-imine rings with at least five ring members, 3-azabicyclo [3.2.2] nonane, piperazine, morpholine or thiomorpholine rings, having only hydrogen atoms directly attached to the ring carbon atoms with substituted hydrocarbon radicals attached to ring nitrogen atoms substituted by carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals with the ring nitrogen atoms and the carbon atoms with three bonds to hetero atoms attached to the same carbon chain, which is not interrupted by carbocyclic rings to an acyclic saturated chain
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K31/00—Medicinal preparations containing organic active ingredients
- A61K31/33—Heterocyclic compounds
- A61K31/395—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins
- A61K31/535—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with at least one nitrogen and one oxygen as the ring hetero atoms, e.g. 1,2-oxazines
- A61K31/5375—1,4-Oxazines, e.g. morpholine
- A61K31/5377—1,4-Oxazines, e.g. morpholine not condensed and containing further heterocyclic rings, e.g. timolol
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- C07D303/38—Compounds containing oxirane rings with hydrocarbon radicals, substituted by carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals
- C07D303/46—Compounds containing oxirane rings with hydrocarbon radicals, substituted by carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals by amide or nitrile radicals
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- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
- Peptides Or Proteins (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Epoxy Compounds (AREA)
- Medicines That Contain Protein Lipid Enzymes And Other Medicines (AREA)
- Heterocyclic Carbon Compounds Containing A Hetero Ring Having Nitrogen And Oxygen As The Only Ring Hetero Atoms (AREA)
Description
(i)(2S,3R)-3-ヒドロキシ-3-(4-メトキシフェニル)-2-((S)-2-(2-モルホリノ-アセトアミド)プロパンアミド)プロパン酸(化合物「E」)
(ii)(S)-3-(シクロペント-1-エン-1-イル)-1-((R)-2-メチルオキシラン-2-イル)-1-オキソプロパン-2-アミニウム塩(化合物「F」)
非プロトン性溶媒中で混合して混合物を形成することと、
(b)カップリング剤とステップ(a)の混合物とを混合して化合物Gを形成することと、を含み、
各混合ステップの温度は-20℃~25℃に維持される、方法を提供する。
(b)混合物を濃縮することと、
(c)酸とステップ(b)の濃縮混合物とを-5℃~5℃の範囲の温度で混合して化合物Fを形成することと、を含み、
式中、X-は、酸の共役塩基である、方法を提供する。
(i)(2S,3R)-1-(ベンジルオキシ)-3-ヒドロキシ-3-(4-メトキシフェニル)-1-オキソプロパン-2-アミニウム塩(化合物「B」)
(ii)(2-モルホリノアセチル)-L-アラニン(化合物「C」)の懸濁液とを
(b)カップリング剤とステップ(a)の混合物とを混合して化合物Dを形成することと、を含み、
各混合ステップの温度は-5℃~5℃に維持される、方法を提供する。
一態様において、化合物Gを調製するための方法が本明細書に提供される。化合物Gは、ステップ(a)およびステップ(b)の2つのステップで調製することができる。ステップ(a)において、混合物は、第三級アミン塩基と、(i)(2S,3R)-3-ヒドロキシ-3-(4-メトキシフェニル)-2-((S)-2-(2-モルホリノ-アセトアミド)プロパンアミド)プロパン酸(化合物「E」)
(ii)(S)-3-(シクロペント-1-エン-1-イル)-1-((R)-2-メチルオキシラン-2-イル)-1-オキソプロパン-2-アミニウム塩(化合物「F」)
化合物Eは、還元剤とベンジル(2S,3R)-3-ヒドロキシ-3-(4-メトキシフェニル)-2-((S)-2-(2-モルホリノアセトアミド)プロパンアミド)プロパノエート(化合物「D」)とを混合することによって調製され得る。
別の態様において、化合物Fを調製する方法が本明細書に提供される。
別の態様において、化合物Dを調製する方法が本明細書に提供される。
(ii)(2-モルホリノアセチル)-L-アラニン(化合物「C」)
化合物Bは、(i)酸と(ii)ベンジル(2S,3R)-2-((tert-ブトキシカルボニル)アミノ)-3-ヒドロキシ-3-(4-メトキシフェニル)プロパノエート(化合物「A」)とを
化合物Gは、上に示したスキーム1に従って調製することができる。
0℃のジクロロメタン(「DCM」)(50mL)中の化合物Aの溶液(7.0g、17.4mmol)にトリフルオロ酢酸(「TFA」)(20mL)を加えた。混合物を30分間撹拌し、次いでDCM(100mL)で希釈した。飽和NaHCO3(水性、100mL)を加え、2つの層を分離した。水層をDCM(2×100mL)で抽出し、合わせた有機層を無水硫酸ナトリウム上で乾燥させ、濃縮して、粗化合物B(5.0g、収率84%)をTFA塩として得た。LC/MS(LRMS(MH)m/z:302。
0℃のジメチルホルムアミド(「DMF」)(100mL)中の化合物B(TFA塩、5.0g、14.8mmol)および化合物C(3.36g、15.9mmol)の溶液に、試薬HATU(6.79g、17.9mmol)およびDIPEA(9.63mL、59.2mmol)を加えた。反応混合物を室温に加温し、1時間撹拌した。混合物を濃縮し、シリカゲル上のフラッシュカラムクロマトグラフィー(石油エーテル/EtOAc=2:1~1:2)により残渣を精製して化合物D(5.8g、収率78%)を無色の固体として得た。LC/MS(LRMS(MH) m/z:500。
THF(120mL)中の化合物D(5.8g、11.6mol)の溶液に、Pd/C(1.5g、10%)を加えた。混合物を周囲温度、H2雰囲気(1気圧)下で一晩撹拌し、次いでセライトのパッドを通して濾過した。減圧下で濾液を濃縮し、残渣をEtOAc(20mL)で洗浄して化合物E(4.8g、収率約100%)を無色の固体として得た。
化合物H(2g)にDCM(8mL)を加え、混合物を5℃に冷却した。内部温度を10℃未満に維持するような速度でTFA(8mL)を加えた。次いで、混合物を周囲温度で30分間撹拌し、次いで真空下で濃縮した。トルエン(3×5mL)を加えて過剰なTFAを除去した。TFA塩にEtOAc(4mL)を加え、続いて2-ナフタレンスルホン酸(6.78mmol、1.41g、10mLのEtOAcに溶解)を加えた。混合物を周囲温度で撹拌したところ、5分以内に無色の固体が沈殿した。混合物をさらに15分間撹拌し、次いで、すすぎのためにEtOAc(10mL)を用いて濾過した。固体を16時間真空下に置いて、ナフタレンスルホネート塩を無色の固体として得た(1.62g、収率72%)。特徴的なDSCおよびTGAデータを図7および8に示す。
0℃のDMF(90mL)中の化合物E(4.8g、11.7mmol)および化合物F(TFA塩、3.46g、11.7mmol)の溶液に、HATU(5.35g、14.1mmol)およびDIPEA(9.55mL、58.7mmol)を加えた。反応混合物を室温に加温し、30分間撹拌した。混合物を濃縮し、シリカゲル上のフラッシュカラムクロマトグラフィー(石油エーテル/EtOAc=2:1~EtOAc)により残渣を精製して、化合物G(4.8g、収率70%、HPLC純度95.2%)を無色の固体として得た。LC/MS(LRMS(MH) m/z:587)。
化合物FのTFA塩(0.70g、2.39mmol)をMTBE(3.5mL)に溶解し、p-トルエンスルホン酸(0.45g、2.39mmol)を加えた。溶液をバイアルに密封し、周囲温度で放置した。9ヶ月後、沈殿した結晶から溶媒を除去し、2日間にわたって周囲温度で固体を乾燥させた。Flack,H.D.;Bernardinelli,G.The Use of X-Ray Crystallography to Determine Absolute Configuration. Chirality,2008,20,681-690を参照されたい。
化合物Fのトリフルオロ酢酸塩およびトシル酸塩の安定性は、各塩の複数のロットを1日または90日間、相対湿度40%で25℃の温度に曝露し、各試料が分解した割合を測定することによって決定した。以下の表に示すように、化合物Fのトシル酸塩は、そのトリフルオロ酢酸対応物よりも著しく安定である。
Claims (16)
- (S)-3-(シクロペント-1-エン-1-イル)-1-((R)-2-メチルオキシラン-2-イル)-1-オキソプロパン-2-アミニウム塩(化合物「F」)を調製する方法であって、
(b)前記混合物を濃縮することと、
(c)酸とステップ(b)の濃縮混合物とを-5℃~5℃の範囲の温度で混合して化合物Fを形成することと、を含み、
式中、X-は、前記酸の共役塩基である、方法。 - 前記酸は、p-トルエンスルホン酸、トリフルオロメタンスルホン酸、酢酸、トリフルオロ酢酸、ナフタレンスルホン酸、4-ニトロベンゼンスルホン酸、スルホン酸、メチルスルホン酸、ベンゼンスルホン酸、硝酸、HF、HCl、HBr、およびそれらの組み合わせからなる群から選択される、請求項1に記載の方法。
- 前記酸は、p-トルエンスルホン酸、ナフタレンスルホン酸、4-ニトロベンゼンスルホン酸、およびそれらの組み合わせからなる群から選択される、請求項2に記載の方法。
- 前記酸と化合物Hとのモル比は1:1である、請求項1~3のいずれか一項に記載の方法。
- TFAと化合物Hとのモル比は8:1である、請求項1~4のいずれか一項に記載の方法。
- ステップ(a)の前記非プロトン性溶媒は、アセトニトリル(「ACN」)、ジクロロメタン(「DCM」)、テトラヒドロフラン(「THF」)、ジメチルアセトアミド(「DMAc」)、メチルtert-ブチルエーテル(「MTBE」)、イソプロピルエーテル(「IPE」)、およびそれらの組み合わせからなる群から選択される、請求項1~5のいずれか一項に記載の方法。
- 前記非プロトン性溶媒はDCMを含む、請求項6に記載の方法。
- ステップ(a)、ステップ(c)、またはその両方の温度は0℃である、請求項1~7のいずれか一項に記載の方法。
- ステップ(b)の前記混合物は、15℃~25℃の範囲の温度で濃縮される、請求項1~8のいずれか一項に記載の方法。
- ステップ(a)の前記混合は、2時間撹拌することを含む、請求項1~9のいずれか一項に記載の方法。
- ステップ(c)の前記混合は、10~12時間撹拌することを含む、請求項1~10のいずれか一項に記載の方法。
- ステップ(b)の前記濃縮混合物を、15℃~25℃の範囲の温度での極性非プロトン性溶媒で洗浄することをさらに含む、請求項1~11のいずれか一項に記載の方法。
- 前記極性非プロトン性溶媒は、ジエチルエーテル、テトラヒドロフラン(「THF」)、アセトニトリル(「ACN」)、メチルtert-ブチルエーテル(「MTBE」)、イソプロピルエーテル(「IPE」)、およびそれらの組み合わせからなる群から選択される、請求項12に記載の方法。
- 前記極性非プロトン性溶媒はMTBEを含む、請求項13に記載の方法。
- 化合物Fを濾過すること、化合物Fを極性非プロトン性溶媒で洗浄すること、および化合物Fを乾燥させること、の1つ以上をさらに含む、請求項1~14のいずれか一項に記載の方法。
- 化合物Fを洗浄するための前記極性非プロトン性溶媒は、ジエチルエーテル、テトラヒドロフラン(「THF」)、アセトニトリル(「ACN」)、メチルtert-ブチルエーテル(「MTBE」)、イソプロピルエーテル(「IPE」)、およびそれらの組み合わせからなる群から選択される、請求項15に記載の方法。
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