JP7498156B2 - モルヌピラビルの製造方法 - Google Patents
モルヌピラビルの製造方法 Download PDFInfo
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- JP7498156B2 JP7498156B2 JP2021116657A JP2021116657A JP7498156B2 JP 7498156 B2 JP7498156 B2 JP 7498156B2 JP 2021116657 A JP2021116657 A JP 2021116657A JP 2021116657 A JP2021116657 A JP 2021116657A JP 7498156 B2 JP7498156 B2 JP 7498156B2
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- molnupiravir
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- cytidine
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- HTNPEHXGEKVIHG-ZJTJHKMLSA-N molnupiravir Chemical compound CC(C)C(=O)OC[C@H]1O[C@H](C(O)C1O)N1C=C\C(NC1=O)=N\O HTNPEHXGEKVIHG-ZJTJHKMLSA-N 0.000 title claims description 20
- 229940075124 molnupiravir Drugs 0.000 title claims description 20
- 238000004519 manufacturing process Methods 0.000 title claims description 10
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 26
- 239000012535 impurity Substances 0.000 claims description 22
- -1 paratoluenesulfonic acid monohydrate Chemical class 0.000 claims description 20
- JOXIMZWYDAKGHI-UHFFFAOYSA-N toluene-4-sulfonic acid Chemical compound CC1=CC=C(S(O)(=O)=O)C=C1 JOXIMZWYDAKGHI-UHFFFAOYSA-N 0.000 claims description 14
- 238000006243 chemical reaction Methods 0.000 claims description 13
- GQHTUMJGOHRCHB-UHFFFAOYSA-N 2,3,4,6,7,8,9,10-octahydropyrimido[1,2-a]azepine Chemical compound C1CCCCN2CCCN=C21 GQHTUMJGOHRCHB-UHFFFAOYSA-N 0.000 claims description 12
- JGFZNNIVVJXRND-UHFFFAOYSA-N N,N-Diisopropylethylamine (DIPEA) Chemical compound CCN(C(C)C)C(C)C JGFZNNIVVJXRND-UHFFFAOYSA-N 0.000 claims description 12
- 239000012458 free base Substances 0.000 claims description 11
- SJRJJKPEHAURKC-UHFFFAOYSA-N N-Methylmorpholine Chemical compound CN1CCOCC1 SJRJJKPEHAURKC-UHFFFAOYSA-N 0.000 claims description 9
- AVXURJPOCDRRFD-UHFFFAOYSA-N Hydroxylamine Chemical compound ON AVXURJPOCDRRFD-UHFFFAOYSA-N 0.000 claims description 8
- XBPCUCUWBYBCDP-UHFFFAOYSA-N Dicyclohexylamine Chemical compound C1CCCCC1NC1CCCCC1 XBPCUCUWBYBCDP-UHFFFAOYSA-N 0.000 claims description 7
- 239000002585 base Substances 0.000 claims description 7
- LSACYLWPPQLVSM-UHFFFAOYSA-N isobutyric acid anhydride Chemical compound CC(C)C(=O)OC(=O)C(C)C LSACYLWPPQLVSM-UHFFFAOYSA-N 0.000 claims description 7
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical compound CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 claims description 6
- UBGDNZQSYVIVHU-PEBGCTIMSA-N 1-[(3ar,4r,6r,6ar)-6-(hydroxymethyl)-2,2-dimethyl-3a,4,6,6a-tetrahydrofuro[3,4-d][1,3]dioxol-4-yl]-4-aminopyrimidin-2-one Chemical compound N1([C@@H]2O[C@H](CO)[C@H]3OC(O[C@H]32)(C)C)C=CC(N)=NC1=O UBGDNZQSYVIVHU-PEBGCTIMSA-N 0.000 claims description 5
- 239000002904 solvent Substances 0.000 claims description 5
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims description 4
- 239000002253 acid Substances 0.000 claims description 4
- 230000000269 nucleophilic effect Effects 0.000 claims description 4
- RYHBNJHYFVUHQT-UHFFFAOYSA-N 1,4-Dioxane Chemical compound C1COCCO1 RYHBNJHYFVUHQT-UHFFFAOYSA-N 0.000 claims description 2
- 239000007795 chemical reaction product Substances 0.000 claims description 2
- IMNIMPAHZVJRPE-UHFFFAOYSA-N triethylenediamine Chemical compound C1CN2CCN1CC2 IMNIMPAHZVJRPE-UHFFFAOYSA-N 0.000 claims description 2
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 30
- WEVYAHXRMPXWCK-UHFFFAOYSA-N Acetonitrile Chemical compound CC#N WEVYAHXRMPXWCK-UHFFFAOYSA-N 0.000 description 24
- UHDGCWIWMRVCDJ-UHFFFAOYSA-N 1-beta-D-Xylofuranosyl-NH-Cytosine Natural products O=C1N=C(N)C=CN1C1C(O)C(O)C(CO)O1 UHDGCWIWMRVCDJ-UHFFFAOYSA-N 0.000 description 15
- UHDGCWIWMRVCDJ-PSQAKQOGSA-N Cytidine Natural products O=C1N=C(N)C=CN1[C@@H]1[C@@H](O)[C@@H](O)[C@H](CO)O1 UHDGCWIWMRVCDJ-PSQAKQOGSA-N 0.000 description 15
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 15
- 239000007787 solid Substances 0.000 description 14
- MQYXQVGWGGZIPS-NJEOMLKJSA-N CC(C)C(C([C@H]([C@H]([C@H]1O)O)O[C@H]1N(C=CC(N)=N1)C1=O)OS(C1=CC=C(C)C=C1)(=O)=O)=O Chemical compound CC(C)C(C([C@H]([C@H]([C@H]1O)O)O[C@H]1N(C=CC(N)=N1)C1=O)OS(C1=CC=C(C)C=C1)(=O)=O)=O MQYXQVGWGGZIPS-NJEOMLKJSA-N 0.000 description 13
- 150000002510 isobutyric acid esters Chemical class 0.000 description 13
- VHYFNPMBLIVWCW-UHFFFAOYSA-N 4-Dimethylaminopyridine Chemical compound CN(C)C1=CC=NC=C1 VHYFNPMBLIVWCW-UHFFFAOYSA-N 0.000 description 12
- QWOJMRHUQHTCJG-UHFFFAOYSA-N CC([CH2-])=O Chemical compound CC([CH2-])=O QWOJMRHUQHTCJG-UHFFFAOYSA-N 0.000 description 12
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 12
- UHDGCWIWMRVCDJ-ZAKLUEHWSA-N cytidine Chemical compound O=C1N=C(N)C=CN1[C@H]1[C@H](O)[C@@H](O)[C@H](CO)O1 UHDGCWIWMRVCDJ-ZAKLUEHWSA-N 0.000 description 12
- 238000004128 high performance liquid chromatography Methods 0.000 description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 11
- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 description 10
- 238000002360 preparation method Methods 0.000 description 10
- AAIWNOAOGFVHTA-UHFFFAOYSA-N [CH2-]C(C)=O.OS(O)(=O)=O Chemical compound [CH2-]C(C)=O.OS(O)(=O)=O AAIWNOAOGFVHTA-UHFFFAOYSA-N 0.000 description 9
- OSWFIVFLDKOXQC-UHFFFAOYSA-N 4-(3-methoxyphenyl)aniline Chemical compound COC1=CC=CC(C=2C=CC(N)=CC=2)=C1 OSWFIVFLDKOXQC-UHFFFAOYSA-N 0.000 description 5
- 238000010511 deprotection reaction Methods 0.000 description 5
- 235000019253 formic acid Nutrition 0.000 description 5
- 230000007062 hydrolysis Effects 0.000 description 5
- 238000006460 hydrolysis reaction Methods 0.000 description 5
- 239000011541 reaction mixture Substances 0.000 description 5
- 150000003839 salts Chemical class 0.000 description 5
- 239000000243 solution Substances 0.000 description 5
- ZNBNBTIDJSKEAM-UHFFFAOYSA-N 4-[7-hydroxy-2-[5-[5-[6-hydroxy-6-(hydroxymethyl)-3,5-dimethyloxan-2-yl]-3-methyloxolan-2-yl]-5-methyloxolan-2-yl]-2,8-dimethyl-1,10-dioxaspiro[4.5]decan-9-yl]-2-methyl-3-propanoyloxypentanoic acid Chemical compound C1C(O)C(C)C(C(C)C(OC(=O)CC)C(C)C(O)=O)OC11OC(C)(C2OC(C)(CC2)C2C(CC(O2)C2C(CC(C)C(O)(CO)O2)C)C)CC1 ZNBNBTIDJSKEAM-UHFFFAOYSA-N 0.000 description 4
- DRTQHJPVMGBUCF-XVFCMESISA-N Uridine Chemical compound O[C@@H]1[C@H](O)[C@@H](CO)O[C@H]1N1C(=O)NC(=O)C=C1 DRTQHJPVMGBUCF-XVFCMESISA-N 0.000 description 4
- 229910000378 hydroxylammonium sulfate Inorganic materials 0.000 description 4
- 239000010410 layer Substances 0.000 description 4
- 238000000746 purification Methods 0.000 description 4
- DHCNZDJJYPJLHU-KLICCBINSA-N CC(C)C(C(C(N)=N1)=CN([C@@H]([C@@H]2O)O[C@H](COS(C3=CC=C(C)C=C3)(=O)=O)[C@H]2O)C1=O)=O Chemical compound CC(C)C(C(C(N)=N1)=CN([C@@H]([C@@H]2O)O[C@H](COS(C3=CC=C(C)C=C3)(=O)=O)[C@H]2O)C1=O)=O DHCNZDJJYPJLHU-KLICCBINSA-N 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 3
- IAZDPXIOMUYVGZ-UHFFFAOYSA-N Dimethylsulphoxide Chemical compound CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 description 3
- 150000001408 amides Chemical class 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 229910002091 carbon monoxide Inorganic materials 0.000 description 3
- 238000004440 column chromatography Methods 0.000 description 3
- 238000002425 crystallisation Methods 0.000 description 3
- 230000008025 crystallization Effects 0.000 description 3
- 230000032050 esterification Effects 0.000 description 3
- 238000005886 esterification reaction Methods 0.000 description 3
- 239000000706 filtrate Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- HTNPEHXGEKVIHG-QCNRFFRDSA-N molnupiravir Chemical compound C(OC(=O)C(C)C)[C@H]1O[C@H]([C@@H]([C@@H]1O)O)N1C(=O)N=C(NO)C=C1 HTNPEHXGEKVIHG-QCNRFFRDSA-N 0.000 description 3
- 239000012044 organic layer Substances 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- 238000005033 Fourier transform infrared spectroscopy Methods 0.000 description 2
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- DRTQHJPVMGBUCF-PSQAKQOGSA-N beta-L-uridine Natural products O[C@H]1[C@@H](O)[C@H](CO)O[C@@H]1N1C(=O)NC(=O)C=C1 DRTQHJPVMGBUCF-PSQAKQOGSA-N 0.000 description 2
- 239000006227 byproduct Substances 0.000 description 2
- 230000003197 catalytic effect Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000002330 electrospray ionisation mass spectrometry Methods 0.000 description 2
- 150000002148 esters Chemical class 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 150000003138 primary alcohols Chemical class 0.000 description 2
- 239000007858 starting material Substances 0.000 description 2
- DRTQHJPVMGBUCF-UHFFFAOYSA-N uracil arabinoside Natural products OC1C(O)C(CO)OC1N1C(=O)NC(=O)C=C1 DRTQHJPVMGBUCF-UHFFFAOYSA-N 0.000 description 2
- 229940045145 uridine Drugs 0.000 description 2
- PWNQRCRMEYGPNQ-UHFFFAOYSA-N 1,2,3,4,5,7,8,9-octahydropyrido[1,2-d][1,4]diazepine Chemical compound C1CNCCN2CCCC=C21 PWNQRCRMEYGPNQ-UHFFFAOYSA-N 0.000 description 1
- HEWZVZIVELJPQZ-UHFFFAOYSA-N 2,2-dimethoxypropane Chemical compound COC(C)(C)OC HEWZVZIVELJPQZ-UHFFFAOYSA-N 0.000 description 1
- XXDXWWILXDMERK-GCUAXGRVSA-N 4-amino-1-[(2S,3R,4S,5R)-3,4-dihydroxy-5-(hydroxymethyl)-2-(2-methylpropanoyl)oxolan-2-yl]pyrimidin-2-one Chemical compound C(C(C)C)(=O)[C@@]1([C@H](O)[C@H](O)[C@@H](CO)O1)N1C(=O)N=C(N)C=C1 XXDXWWILXDMERK-GCUAXGRVSA-N 0.000 description 1
- OSHIQPFXKULOPB-UHFFFAOYSA-N 6-(hydroxyamino)-1h-pyrimidin-2-one Chemical compound ONC1=CC=NC(=O)N1 OSHIQPFXKULOPB-UHFFFAOYSA-N 0.000 description 1
- FERIUCNNQQJTOY-UHFFFAOYSA-M Butyrate Chemical compound CCCC([O-])=O FERIUCNNQQJTOY-UHFFFAOYSA-M 0.000 description 1
- FERIUCNNQQJTOY-UHFFFAOYSA-N Butyric acid Natural products CCCC(O)=O FERIUCNNQQJTOY-UHFFFAOYSA-N 0.000 description 1
- JUZIKLANMIQLSG-UGKPPGOTSA-N CC(C)C(C(C(N)=N1)=CN([C@@H]([C@@H]2O)O[C@H](CO)[C@H]2O)C1=O)=O Chemical compound CC(C)C(C(C(N)=N1)=CN([C@@H]([C@@H]2O)O[C@H](CO)[C@H]2O)C1=O)=O JUZIKLANMIQLSG-UGKPPGOTSA-N 0.000 description 1
- HNTFXNQNABXIEQ-FPNNGLGKSA-N CC(C)C(C([C@H]([C@H]([C@H]1O)O)O[C@H]1N(C=CC(N)=N1)C1=O)O)=O Chemical compound CC(C)C(C([C@H]([C@H]([C@H]1O)O)O[C@H]1N(C=CC(N)=N1)C1=O)O)=O HNTFXNQNABXIEQ-FPNNGLGKSA-N 0.000 description 1
- 208000025721 COVID-19 Diseases 0.000 description 1
- 108010031797 Candida antarctica lipase B Proteins 0.000 description 1
- 108090000790 Enzymes Proteins 0.000 description 1
- 102000004190 Enzymes Human genes 0.000 description 1
- 108010093096 Immobilized Enzymes Proteins 0.000 description 1
- XCUAIINAJCDIPM-XVFCMESISA-N N(4)-hydroxycytidine Chemical compound O[C@@H]1[C@H](O)[C@@H](CO)O[C@H]1N1C(=O)NC(=NO)C=C1 XCUAIINAJCDIPM-XVFCMESISA-N 0.000 description 1
- 108010084311 Novozyme 435 Proteins 0.000 description 1
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 125000003277 amino group Chemical group 0.000 description 1
- 239000003443 antiviral agent Substances 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 229940126587 biotherapeutics Drugs 0.000 description 1
- YHASWHZGWUONAO-UHFFFAOYSA-N butanoyl butanoate Chemical compound CCCC(=O)OC(=O)CCC YHASWHZGWUONAO-UHFFFAOYSA-N 0.000 description 1
- 230000037029 cross reaction Effects 0.000 description 1
- OPTASPLRGRRNAP-UHFFFAOYSA-N cytosine Chemical class NC=1C=CNC(=O)N=1 OPTASPLRGRRNAP-UHFFFAOYSA-N 0.000 description 1
- 230000009615 deamination Effects 0.000 description 1
- 238000006481 deamination reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- UMIJUNPUFYIHJW-UHFFFAOYSA-N dicyclohexylazanium;4-methylbenzenesulfonate Chemical compound CC1=CC=C(S([O-])(=O)=O)C=C1.C1CCCCC1[NH2+]C1CCCCC1 UMIJUNPUFYIHJW-UHFFFAOYSA-N 0.000 description 1
- 150000005690 diesters Chemical class 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000002255 enzymatic effect Effects 0.000 description 1
- 125000004185 ester group Chemical group 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 150000004682 monohydrates Chemical class 0.000 description 1
- 150000007530 organic bases Chemical class 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 238000004448 titration Methods 0.000 description 1
- 238000005891 transamination reaction Methods 0.000 description 1
- 150000005691 triesters Chemical class 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07H—SUGARS; DERIVATIVES THEREOF; NUCLEOSIDES; NUCLEOTIDES; NUCLEIC ACIDS
- C07H1/00—Processes for the preparation of sugar derivatives
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07H—SUGARS; DERIVATIVES THEREOF; NUCLEOSIDES; NUCLEOTIDES; NUCLEIC ACIDS
- C07H19/00—Compounds containing a hetero ring sharing one ring hetero atom with a saccharide radical; Nucleosides; Mononucleotides; Anhydro-derivatives thereof
- C07H19/02—Compounds containing a hetero ring sharing one ring hetero atom with a saccharide radical; Nucleosides; Mononucleotides; Anhydro-derivatives thereof sharing nitrogen
- C07H19/04—Heterocyclic radicals containing only nitrogen atoms as ring hetero atom
- C07H19/06—Pyrimidine radicals
- C07H19/067—Pyrimidine radicals with ribosyl as the saccharide radical
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/50—Improvements relating to the production of bulk chemicals
- Y02P20/55—Design of synthesis routes, e.g. reducing the use of auxiliary or protecting groups
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Biochemistry (AREA)
- Biotechnology (AREA)
- General Health & Medical Sciences (AREA)
- Genetics & Genomics (AREA)
- Molecular Biology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Saccharide Compounds (AREA)
- Plural Heterocyclic Compounds (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
Description
したがって、シチジンに基づく両方のスキームには特定の欠点があり、より安全な代替の製造方法が必要である。
(a)構造(II)を有する硫酸2’,3’-O-イソプロピリデンシチジンを、非求核塩基の存在下、室温で無水イソ酪酸と溶媒中で反応させて、構造(III)の5-イソ酪酸エステルを得る工程であって、当該5-イソ酪酸エステルは、不純物(不純物1)としてN-イソ酪酸アミドを有する工程と、
硫酸シチジンアセトニド(II)(22g、57.69mmol)、4-ジメチルアミノピリジン(1.41g、0.2当量)、1.4-ジアザビシクロ[5.4.0]ウンデカ-7-エン(27.23g、3.1当量)をアセトニトリル(220mL)に溶解し、無水イソ酪酸(14.6g、1.6当量)を15分間加えた。溶液を20時間撹拌した。反応混合物を濃縮し、残留物を水(100mL)およびジクロロメタン(100mL)で処理した。5分間撹拌した後、2つの層を分離し、有機層を無水硫酸ナトリウムで乾燥させ、濃縮して、89.7%の(III)、8.54%の不純物1および0.54%の未知の不純物2を含む20.9gの泡状固体を得た。
1H-NMR (300 MHz, DMSO-d6): δ 9.50 (s, 1H), 8.44 (s, 1H), 7.95-7.93 (d, 1H), 7.50-7.46 (d, 2H, Ar-H), 7.13-7.10 (d, 2H, Ar-H), 6.12-6.09 (d, 1H), 5.71-5.69 (d, 1H), 4.33-4.20 (m, 2H), 4.12-4.04 (m, 2H), 3.93-3.89 (m, 1H), 2.64-2.54 (m, 1H), 2.29 (s, 3H), 1.11-1.05 (d, 6H).
13C-NMR (75 MHz, DMSO-d6): δ 176.40, 159.64, 147.65, 145.05, 144.87, 138.82, 128.76, 125.93, 94.65, 90.99, 81.64, 73.73, 69.71, 63.90, 33.60, 21.25, 19.24, 19.19.
ESI-MS: 314.18 [M+H] + (遊離塩基 M.W.: 313.31).
硫酸シチジンアセトニド(II)(30.3g)、4-ジメチルアミノピリジン(1.94g、0.2当量)、1.4-ジアザビシクロ[5.4.0]ウンデカ-7-エン(37.5g、3.1当量)をアセトニトリル(300mL)に溶解し、無水イソ酪酸(20.1g、1.6当量)を滴下し、実施例1に記載のように反応を完了して、HPLC分析で88.17%の(III)、7.31%の不純物1および0.43%の未知の不純物2を含む29.1gの泡状固体を得た。
1H-NMR (300 MHz, DMSO-d6): δ 9.51 (s, 1H), 8.42 (s, 1H), 8.00-7.98 (d, 1H), 7.49-7.47 (d, 2H, Ar-H), 7.13-7.10 (d, 2H, Ar-H), 6.08-6.06 (d, 1H), 5.80-5.79 (d, 1H), 5.07-5.04 (dd, 1H), 4.80-4.77 (dd, 1H), 4.36-4.32 (m, 1H), 4.28-4.17 (m, 2H), 2.54-2.47 (m, 1H and DMSO), 2.29 (s, 3H), 1.49 (s, 3H), 1.29 (s, 3H), 1.08-1.05 (d, 6H).
13C-NMR (75 MHz, DMSO-d6): δ 176.27, 159.93, 147.68, 146.80, 145.46, 138.55, 128.68, 125.93, 113.63, 94.44, 85.48, 84.38, 81.12, 64.21, 33.51, 27.32, 25.54, 21.25, 19.19, 19.10.
ESI-MS: 354.12 [M+H] + (遊離塩基 M.W.: 353.37).
溶媒の酢酸エチルをアセトニトリルに置き換えたことを除いて、実施例1に記載のように実験を行った(収率:80.6%;HPLCによる純度:98.6%)。
硫酸シチジンアセトニド(II)(3g)、4-ジメチルアミノピリジン(0.19g、0.2当量)、ジイソプロピルエチルアミン(DIPEA)(3.15g、3.1当量)をアセトニトリル(30mL)に溶解し、無水イソ酪酸(3.15g、1.6当量)を15分間加えた。溶液を16時間撹拌した。反応混合物を濃縮し、残留物を水(100mL)およびジクロロメタン(100mL)で処理した。5分間撹拌した後、2つの層を分離し、有機層を無水硫酸ナトリウムで乾燥させ、濃縮して2.6g(95%)の(III)を得た。HPLCによる純度:83.15%;9.04%の不純物1および0.31%の未知の不純物2
シチジン-5’-イソ酪酸エステルトシル酸塩(IV)(15g、0.031mol)をアセトン(300mL)に懸濁し、撹拌した。懸濁液にジシクロヘキシルアミン(6.72g、0.037mol)を加え、撹拌を2時間続けた。トシル酸ジシクロヘキシルアンモニウムの沈殿した塩を濾過により除去した。固体をアセトン(50mL)で洗浄した。アセトン濾液をプールし、減圧下で濃縮した。残留物を水(100mL)に溶解し、ジクロロメタン(2×100mL)で洗浄した。水溶液を減圧下で濃縮し、得られた固体残留物をアセトンで共沸混合させて、8.3g(85%Y)の泡状固体(V)を得た。HPLCによる純度:99.5%。
アセトンを1,4-ジオキサンに置き換えて7.8g(80.6%Y)の(V)を得たことを除いて、実施例4に記載のように実験を行った。HPLCによる純度:98.6%。
イソブチリルシチジン(V)(5.0g、0.15mmol)を70%イソプロピルアルコールに懸濁し、硫酸ヒドロキシルアミン(8.4g、0.51mmol)を加えた。反応混合物を75~80℃に16時間加熱した。イソプロピルアルコール層を分離し、減圧下で濃縮した。残留物をイソプロピルアルコール(60mL)に溶解し、濾過により未溶解物を除去し、濾液を濃縮し、残留物を再び50℃でイソプロピルアルコールに溶解した。透明な溶液を冷却し、固体を濾過して、3.7g(71%)の(I)を無色の固体として得た。HPLC:99.29。
Claims (5)
- 式(I)を有するモルヌピラビルの製造方法であって、
を備えるモルヌピラビルの製造方法。
- 工程(a)において、非求核性塩基は、ジイソプロピルエチルアミン(DIPEA)、N-メチルモルホリン、1,4-ジアザビシクロ-[2.2.2]オクタン(DABCO)および1,8-ジアザビシクロ[5.4.0]ウンデカ-7-エン(DBU)ならびにトリエチルアミンからなる群より選択される、請求項1に記載のモルヌピラビルの製造方法。
- 工程(b)において、反応が50~90℃の温度で行われる、請求項1に記載のモルヌピラビルの製造方法。
- 工程(c)において、5’-イソブチリルシチジン酸塩(IV)が、ジシクロヘキシルアミンを使用して遊離塩基(V)に変換される、請求項1に記載のモルヌピラビルの製造方法。
- 工程(c)において、5’-イソブチリルシチジン酸塩(IV)が、溶媒としてアセトンまたは1,4-ジオキサンを使用して遊離塩基(V)に変換される、請求項1に記載のモルヌピラビルの製造方法。
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