CN114230514B - 一种合成3-氟-2-氨基异烟腈的方法 - Google Patents
一种合成3-氟-2-氨基异烟腈的方法 Download PDFInfo
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- CN114230514B CN114230514B CN202111421748.5A CN202111421748A CN114230514B CN 114230514 B CN114230514 B CN 114230514B CN 202111421748 A CN202111421748 A CN 202111421748A CN 114230514 B CN114230514 B CN 114230514B
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- 238000000034 method Methods 0.000 title claims abstract description 18
- 230000002194 synthesizing effect Effects 0.000 title claims abstract description 7
- 150000002825 nitriles Chemical class 0.000 title abstract description 13
- 150000001875 compounds Chemical class 0.000 claims abstract description 80
- 238000006243 chemical reaction Methods 0.000 claims abstract description 46
- 238000006460 hydrolysis reaction Methods 0.000 claims abstract description 9
- 238000005886 esterification reaction Methods 0.000 claims abstract description 7
- XDBMKSULKQLTEQ-UHFFFAOYSA-N 2-amino-3-fluoropyridine-4-carboxylic acid Chemical compound C1=CC(C(=O)O)=C(F)C(=N1)N XDBMKSULKQLTEQ-UHFFFAOYSA-N 0.000 claims abstract description 5
- 238000006138 lithiation reaction Methods 0.000 claims abstract description 5
- YXFVVABEGXRONW-UHFFFAOYSA-N toluene Substances CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 claims description 35
- 239000000243 solution Substances 0.000 claims description 27
- 239000003054 catalyst Substances 0.000 claims description 25
- 239000003153 chemical reaction reagent Substances 0.000 claims description 23
- WFDIJRYMOXRFFG-UHFFFAOYSA-N Acetic anhydride Chemical compound CC(=O)OC(C)=O WFDIJRYMOXRFFG-UHFFFAOYSA-N 0.000 claims description 18
- 239000003960 organic solvent Substances 0.000 claims description 17
- 239000002253 acid Substances 0.000 claims description 13
- 239000011259 mixed solution Substances 0.000 claims description 13
- WTDHULULXKLSOZ-UHFFFAOYSA-N Hydroxylamine hydrochloride Chemical compound Cl.ON WTDHULULXKLSOZ-UHFFFAOYSA-N 0.000 claims description 12
- 239000003513 alkali Substances 0.000 claims description 12
- 150000007529 inorganic bases Chemical class 0.000 claims description 12
- -1 alkyl lithium Chemical compound 0.000 claims description 11
- KDLHZDBZIXYQEI-UHFFFAOYSA-N palladium Substances [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 claims description 11
- 125000002915 carbonyl group Chemical group [*:2]C([*:1])=O 0.000 claims description 10
- LYCAIKOWRPUZTN-UHFFFAOYSA-N ethylene glycol Natural products OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 10
- NLFBCYMMUAKCPC-KQQUZDAGSA-N ethyl (e)-3-[3-amino-2-cyano-1-[(e)-3-ethoxy-3-oxoprop-1-enyl]sulfanyl-3-oxoprop-1-enyl]sulfanylprop-2-enoate Chemical compound CCOC(=O)\C=C\SC(=C(C#N)C(N)=O)S\C=C\C(=O)OCC NLFBCYMMUAKCPC-KQQUZDAGSA-N 0.000 claims description 9
- MZRVEZGGRBJDDB-UHFFFAOYSA-N N-Butyllithium Chemical compound [Li]CCCC MZRVEZGGRBJDDB-UHFFFAOYSA-N 0.000 claims description 8
- DTQVDTLACAAQTR-UHFFFAOYSA-N Trifluoroacetic acid Chemical compound OC(=O)C(F)(F)F DTQVDTLACAAQTR-UHFFFAOYSA-N 0.000 claims description 8
- 229910052744 lithium Inorganic materials 0.000 claims description 8
- MFRIHAYPQRLWNB-UHFFFAOYSA-N sodium tert-butoxide Chemical compound [Na+].CC(C)(C)[O-] MFRIHAYPQRLWNB-UHFFFAOYSA-N 0.000 claims description 8
- 239000003446 ligand Substances 0.000 claims description 7
- 238000005406 washing Methods 0.000 claims description 7
- 238000005917 acylation reaction Methods 0.000 claims description 6
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 5
- JOXIMZWYDAKGHI-UHFFFAOYSA-N p-toluenesulfonic acid Substances CC1=CC=C(S(O)(=O)=O)C=C1 JOXIMZWYDAKGHI-UHFFFAOYSA-N 0.000 claims description 5
- 238000010791 quenching Methods 0.000 claims description 5
- 230000000171 quenching effect Effects 0.000 claims description 5
- XBDQKXXYIPTUBI-UHFFFAOYSA-M Propionate Chemical compound CCC([O-])=O XBDQKXXYIPTUBI-UHFFFAOYSA-M 0.000 claims description 4
- 230000010933 acylation Effects 0.000 claims description 4
- WBJINCZRORDGAQ-UHFFFAOYSA-N formic acid ethyl ester Natural products CCOC=O WBJINCZRORDGAQ-UHFFFAOYSA-N 0.000 claims description 4
- 230000007062 hydrolysis Effects 0.000 claims description 4
- MUALRAIOVNYAIW-UHFFFAOYSA-N binap Chemical compound C1=CC=CC=C1P(C=1C(=C2C=CC=CC2=CC=1)C=1C2=CC=CC=C2C=CC=1P(C=1C=CC=CC=1)C=1C=CC=CC=1)C1=CC=CC=C1 MUALRAIOVNYAIW-UHFFFAOYSA-N 0.000 claims description 3
- YJVFFLUZDVXJQI-UHFFFAOYSA-L palladium(ii) acetate Chemical compound [Pd+2].CC([O-])=O.CC([O-])=O YJVFFLUZDVXJQI-UHFFFAOYSA-L 0.000 claims description 3
- 239000003638 chemical reducing agent Substances 0.000 claims description 2
- HTSGKJQDMSTCGS-UHFFFAOYSA-N 1,4-bis(4-chlorophenyl)-2-(4-methylphenyl)sulfonylbutane-1,4-dione Chemical compound C1=CC(C)=CC=C1S(=O)(=O)C(C(=O)C=1C=CC(Cl)=CC=1)CC(=O)C1=CC=C(Cl)C=C1 HTSGKJQDMSTCGS-UHFFFAOYSA-N 0.000 claims 6
- FCSKOFQQCWLGMV-UHFFFAOYSA-N 5-{5-[2-chloro-4-(4,5-dihydro-1,3-oxazol-2-yl)phenoxy]pentyl}-3-methylisoxazole Chemical compound O1N=C(C)C=C1CCCCCOC1=CC=C(C=2OCCN=2)C=C1Cl FCSKOFQQCWLGMV-UHFFFAOYSA-N 0.000 claims 3
- FKLJPTJMIBLJAV-UHFFFAOYSA-N Compound IV Chemical compound O1N=C(C)C=C1CCCCCCCOC1=CC=C(C=2OCCN=2)C=C1 FKLJPTJMIBLJAV-UHFFFAOYSA-N 0.000 claims 3
- 238000005903 acid hydrolysis reaction Methods 0.000 claims 1
- 125000003827 glycol group Chemical group 0.000 claims 1
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 claims 1
- 125000005489 p-toluenesulfonic acid group Chemical group 0.000 claims 1
- 239000002994 raw material Substances 0.000 abstract description 10
- 239000003814 drug Substances 0.000 abstract description 6
- SVAZIMBLBHOVIR-UHFFFAOYSA-N 2-chloro-3-fluoropyridine Chemical compound FC1=CC=CN=C1Cl SVAZIMBLBHOVIR-UHFFFAOYSA-N 0.000 abstract description 5
- 230000015572 biosynthetic process Effects 0.000 abstract description 5
- 238000003786 synthesis reaction Methods 0.000 abstract description 4
- 230000003197 catalytic effect Effects 0.000 abstract description 3
- 238000005859 coupling reaction Methods 0.000 abstract description 3
- 238000006114 decarboxylation reaction Methods 0.000 abstract description 3
- DHKHKXVYLBGOIT-UHFFFAOYSA-N acetaldehyde Diethyl Acetal Natural products CCOC(C)OCC DHKHKXVYLBGOIT-UHFFFAOYSA-N 0.000 abstract description 2
- 125000002777 acetyl group Chemical class [H]C([H])([H])C(*)=O 0.000 abstract description 2
- 238000009776 industrial production Methods 0.000 abstract description 2
- 238000006146 oximation reaction Methods 0.000 abstract description 2
- 150000002923 oximes Chemical class 0.000 abstract description 2
- 238000003756 stirring Methods 0.000 description 24
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 22
- DRSHXJFUUPIBHX-UHFFFAOYSA-N COc1ccc(cc1)N1N=CC2C=NC(Nc3cc(OC)c(OC)c(OCCCN4CCN(C)CC4)c3)=NC12 Chemical compound COc1ccc(cc1)N1N=CC2C=NC(Nc3cc(OC)c(OC)c(OCCCN4CCN(C)CC4)c3)=NC12 DRSHXJFUUPIBHX-UHFFFAOYSA-N 0.000 description 18
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 15
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 15
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 14
- OBTZDIRUQWFRFZ-UHFFFAOYSA-N 2-(5-methylfuran-2-yl)-n-(4-methylphenyl)quinoline-4-carboxamide Chemical compound O1C(C)=CC=C1C1=CC(C(=O)NC=2C=CC(C)=CC=2)=C(C=CC=C2)C2=N1 OBTZDIRUQWFRFZ-UHFFFAOYSA-N 0.000 description 13
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 12
- 239000012074 organic phase Substances 0.000 description 12
- 239000007787 solid Substances 0.000 description 12
- 229910000029 sodium carbonate Inorganic materials 0.000 description 11
- 235000017550 sodium carbonate Nutrition 0.000 description 11
- FIWILGQIZHDAQG-UHFFFAOYSA-N NC1=C(C(=O)NCC2=CC=C(C=C2)OCC(F)(F)F)C=C(C(=N1)N)N1N=C(N=C1)C1(CC1)C(F)(F)F Chemical compound NC1=C(C(=O)NCC2=CC=C(C=C2)OCC(F)(F)F)C=C(C(=N1)N)N1N=C(N=C1)C1(CC1)C(F)(F)F FIWILGQIZHDAQG-UHFFFAOYSA-N 0.000 description 9
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 8
- JUJWROOIHBZHMG-UHFFFAOYSA-N Pyridine Chemical compound C1=CC=NC=C1 JUJWROOIHBZHMG-UHFFFAOYSA-N 0.000 description 8
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 8
- 238000002360 preparation method Methods 0.000 description 8
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 6
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 6
- 239000000047 product Substances 0.000 description 6
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 235000011118 potassium hydroxide Nutrition 0.000 description 5
- UMJSCPRVCHMLSP-UHFFFAOYSA-N pyridine Natural products COC1=CC=CN=C1 UMJSCPRVCHMLSP-UHFFFAOYSA-N 0.000 description 5
- 235000011121 sodium hydroxide Nutrition 0.000 description 5
- 238000001228 spectrum Methods 0.000 description 5
- 239000002585 base Substances 0.000 description 4
- 238000001035 drying Methods 0.000 description 4
- 238000001914 filtration Methods 0.000 description 4
- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 description 4
- 229910000027 potassium carbonate Inorganic materials 0.000 description 4
- 235000011181 potassium carbonates Nutrition 0.000 description 4
- 239000003223 protective agent Substances 0.000 description 4
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 239000007864 aqueous solution Substances 0.000 description 3
- 150000003222 pyridines Chemical class 0.000 description 3
- 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 2
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 2
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 description 2
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 description 2
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 2
- DTQVDTLACAAQTR-UHFFFAOYSA-M Trifluoroacetate Chemical compound [O-]C(=O)C(F)(F)F DTQVDTLACAAQTR-UHFFFAOYSA-M 0.000 description 2
- 239000008346 aqueous phase Substances 0.000 description 2
- 239000006227 byproduct Substances 0.000 description 2
- 239000012295 chemical reaction liquid Substances 0.000 description 2
- 238000004440 column chromatography Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000706 filtrate Substances 0.000 description 2
- 239000012847 fine chemical Substances 0.000 description 2
- 235000019253 formic acid Nutrition 0.000 description 2
- 150000002391 heterocyclic compounds Chemical class 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- TWBYWOBDOCUKOW-UHFFFAOYSA-N isonicotinic acid Chemical compound OC(=O)C1=CC=NC=C1 TWBYWOBDOCUKOW-UHFFFAOYSA-N 0.000 description 2
- TZIHFWKZFHZASV-UHFFFAOYSA-N methyl formate Chemical compound COC=O TZIHFWKZFHZASV-UHFFFAOYSA-N 0.000 description 2
- 239000011736 potassium bicarbonate Substances 0.000 description 2
- 235000015497 potassium bicarbonate Nutrition 0.000 description 2
- 229910000028 potassium bicarbonate Inorganic materials 0.000 description 2
- TYJJADVDDVDEDZ-UHFFFAOYSA-M potassium hydrogencarbonate Chemical compound [K+].OC([O-])=O TYJJADVDDVDEDZ-UHFFFAOYSA-M 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N sulfuric acid Substances OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- JIAARYAFYJHUJI-UHFFFAOYSA-L zinc dichloride Chemical compound [Cl-].[Cl-].[Zn+2] JIAARYAFYJHUJI-UHFFFAOYSA-L 0.000 description 2
- CYPYTURSJDMMMP-WVCUSYJESA-N (1e,4e)-1,5-diphenylpenta-1,4-dien-3-one;palladium Chemical compound [Pd].[Pd].C=1C=CC=CC=1\C=C\C(=O)\C=C\C1=CC=CC=C1.C=1C=CC=CC=1\C=C\C(=O)\C=C\C1=CC=CC=C1.C=1C=CC=CC=1\C=C\C(=O)\C=C\C1=CC=CC=C1 CYPYTURSJDMMMP-WVCUSYJESA-N 0.000 description 1
- KZPYGQFFRCFCPP-UHFFFAOYSA-N 1,1'-bis(diphenylphosphino)ferrocene Chemical compound [Fe+2].C1=CC=C[C-]1P(C=1C=CC=CC=1)C1=CC=CC=C1.C1=CC=C[C-]1P(C=1C=CC=CC=1)C1=CC=CC=C1 KZPYGQFFRCFCPP-UHFFFAOYSA-N 0.000 description 1
- VYMPLPIFKRHAAC-UHFFFAOYSA-N 1,2-ethanedithiol Chemical compound SCCS VYMPLPIFKRHAAC-UHFFFAOYSA-N 0.000 description 1
- YNGDWRXWKFWCJY-UHFFFAOYSA-N 1,4-Dihydropyridine Chemical compound C1C=CNC=C1 YNGDWRXWKFWCJY-UHFFFAOYSA-N 0.000 description 1
- IDPURXSQCKYKIJ-UHFFFAOYSA-N 1-(4-methoxyphenyl)methanamine Chemical compound COC1=CC=C(CN)C=C1 IDPURXSQCKYKIJ-UHFFFAOYSA-N 0.000 description 1
- PCFUWBOSXMKGIP-UHFFFAOYSA-N 2-benzylpyridine Chemical compound C=1C=CC=NC=1CC1=CC=CC=C1 PCFUWBOSXMKGIP-UHFFFAOYSA-N 0.000 description 1
- IMRWILPUOVGIMU-UHFFFAOYSA-N 2-bromopyridine Chemical compound BrC1=CC=CC=N1 IMRWILPUOVGIMU-UHFFFAOYSA-N 0.000 description 1
- FNRMMDCDHWCQTH-UHFFFAOYSA-N 2-chloropyridine;3-chloropyridine;4-chloropyridine Chemical compound ClC1=CC=NC=C1.ClC1=CC=CN=C1.ClC1=CC=CC=N1 FNRMMDCDHWCQTH-UHFFFAOYSA-N 0.000 description 1
- FFNVQNRYTPFDDP-UHFFFAOYSA-N 2-cyanopyridine Chemical compound N#CC1=CC=CC=N1 FFNVQNRYTPFDDP-UHFFFAOYSA-N 0.000 description 1
- NRGGMCIBEHEAIL-UHFFFAOYSA-N 2-ethylpyridine Chemical compound CCC1=CC=CC=N1 NRGGMCIBEHEAIL-UHFFFAOYSA-N 0.000 description 1
- MTAODLNXWYIKSO-UHFFFAOYSA-N 2-fluoropyridine Chemical compound FC1=CC=CC=N1 MTAODLNXWYIKSO-UHFFFAOYSA-N 0.000 description 1
- CCZWSTFVHJPCEM-UHFFFAOYSA-N 2-iodopyridine Chemical compound IC1=CC=CC=N1 CCZWSTFVHJPCEM-UHFFFAOYSA-N 0.000 description 1
- BSKHPKMHTQYZBB-UHFFFAOYSA-N 2-methylpyridine Chemical compound CC1=CC=CC=N1 BSKHPKMHTQYZBB-UHFFFAOYSA-N 0.000 description 1
- HLTDBMHJSBSAOM-UHFFFAOYSA-N 2-nitropyridine Chemical compound [O-][N+](=O)C1=CC=CC=N1 HLTDBMHJSBSAOM-UHFFFAOYSA-N 0.000 description 1
- GOYPFNAZTPCXGS-UHFFFAOYSA-N 3-fluoro-2-(trifluoromethyl)pyridine-4-carboxylic acid Chemical compound OC(=O)C1=CC=NC(C(F)(F)F)=C1F GOYPFNAZTPCXGS-UHFFFAOYSA-N 0.000 description 1
- KZMGYPLQYOPHEL-UHFFFAOYSA-N Boron trifluoride etherate Chemical compound FB(F)F.CCOCC KZMGYPLQYOPHEL-UHFFFAOYSA-N 0.000 description 1
- GSNUFIFRDBKVIE-UHFFFAOYSA-N DMF Natural products CC1=CC=C(C)O1 GSNUFIFRDBKVIE-UHFFFAOYSA-N 0.000 description 1
- LSDPWZHWYPCBBB-UHFFFAOYSA-N Methanethiol Chemical compound SC LSDPWZHWYPCBBB-UHFFFAOYSA-N 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- VMHLLURERBWHNL-UHFFFAOYSA-M Sodium acetate Chemical compound [Na+].CC([O-])=O VMHLLURERBWHNL-UHFFFAOYSA-M 0.000 description 1
- UIIMBOGNXHQVGW-DEQYMQKBSA-M Sodium bicarbonate-14C Chemical compound [Na+].O[14C]([O-])=O UIIMBOGNXHQVGW-DEQYMQKBSA-M 0.000 description 1
- NTYDXFVCCCPXRG-UHFFFAOYSA-N [Li]C(C)(C)CC(C)(C)C Chemical compound [Li]C(C)(C)CC(C)(C)C NTYDXFVCCCPXRG-UHFFFAOYSA-N 0.000 description 1
- LPGFUWDULBDHNI-UHFFFAOYSA-N [Li]C1(CCCC)CCCCC1 Chemical compound [Li]C1(CCCC)CCCCC1 LPGFUWDULBDHNI-UHFFFAOYSA-N 0.000 description 1
- WXZIKFXSSPSWSR-UHFFFAOYSA-N [Li]CCCCC Chemical compound [Li]CCCCC WXZIKFXSSPSWSR-UHFFFAOYSA-N 0.000 description 1
- WZBHJENIKYQMHC-UHFFFAOYSA-N [Li]CCCCCCCCCCCCCCCCCCCC Chemical compound [Li]CCCCCCCCCCCCCCCCCCCC WZBHJENIKYQMHC-UHFFFAOYSA-N 0.000 description 1
- 150000003927 aminopyridines Chemical class 0.000 description 1
- 239000003674 animal food additive Substances 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- FJDQFPXHSGXQBY-UHFFFAOYSA-L caesium carbonate Chemical compound [Cs+].[Cs+].[O-]C([O-])=O FJDQFPXHSGXQBY-UHFFFAOYSA-L 0.000 description 1
- 229910000024 caesium carbonate Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000003034 coal gas Substances 0.000 description 1
- 239000011280 coal tar Substances 0.000 description 1
- LBJNMUFDOHXDFG-UHFFFAOYSA-N copper;hydrate Chemical compound O.[Cu].[Cu] LBJNMUFDOHXDFG-UHFFFAOYSA-N 0.000 description 1
- LEKSIJZGSFETSJ-UHFFFAOYSA-N cyclohexane;lithium Chemical compound [Li]C1CCCCC1 LEKSIJZGSFETSJ-UHFFFAOYSA-N 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000032050 esterification Effects 0.000 description 1
- DNJIEGIFACGWOD-UHFFFAOYSA-N ethanethiol Chemical compound CCS DNJIEGIFACGWOD-UHFFFAOYSA-N 0.000 description 1
- BLHLJVCOVBYQQS-UHFFFAOYSA-N ethyllithium Chemical compound [Li]CC BLHLJVCOVBYQQS-UHFFFAOYSA-N 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- XZBIXDPGRMLSTC-UHFFFAOYSA-N formohydrazide Chemical compound NNC=O XZBIXDPGRMLSTC-UHFFFAOYSA-N 0.000 description 1
- 150000005748 halopyridines Chemical class 0.000 description 1
- RBBOWEDMXHTEPA-UHFFFAOYSA-N hexane;toluene Chemical compound CCCCCC.CC1=CC=CC=C1 RBBOWEDMXHTEPA-UHFFFAOYSA-N 0.000 description 1
- YSAKFRWFAVUMQK-UHFFFAOYSA-N hydrazine;pyridine-4-carboxylic acid Chemical compound NN.OC(=O)C1=CC=NC=C1 YSAKFRWFAVUMQK-UHFFFAOYSA-N 0.000 description 1
- 229960003350 isoniazid Drugs 0.000 description 1
- QRXWMOHMRWLFEY-UHFFFAOYSA-N isoniazide Chemical compound NNC(=O)C1=CC=NC=C1 QRXWMOHMRWLFEY-UHFFFAOYSA-N 0.000 description 1
- UBJFKNSINUCEAL-UHFFFAOYSA-N lithium;2-methylpropane Chemical compound [Li+].C[C-](C)C UBJFKNSINUCEAL-UHFFFAOYSA-N 0.000 description 1
- WGOPGODQLGJZGL-UHFFFAOYSA-N lithium;butane Chemical compound [Li+].CC[CH-]C WGOPGODQLGJZGL-UHFFFAOYSA-N 0.000 description 1
- CETVQRFGPOGIQJ-UHFFFAOYSA-N lithium;hexane Chemical compound [Li+].CCCCC[CH2-] CETVQRFGPOGIQJ-UHFFFAOYSA-N 0.000 description 1
- SZAVVKVUMPLRRS-UHFFFAOYSA-N lithium;propane Chemical compound [Li+].C[CH-]C SZAVVKVUMPLRRS-UHFFFAOYSA-N 0.000 description 1
- XBEREOHJDYAKDA-UHFFFAOYSA-N lithium;propane Chemical compound [Li+].CC[CH2-] XBEREOHJDYAKDA-UHFFFAOYSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- DVSDBMFJEQPWNO-UHFFFAOYSA-N methyllithium Chemical compound C[Li] DVSDBMFJEQPWNO-UHFFFAOYSA-N 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- C07D213/00—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members
- C07D213/02—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members
- C07D213/04—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom
- C07D213/60—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
- C07D213/78—Carbon atoms having three bonds to hetero atoms, with at the most one bond to halogen, e.g. ester or nitrile radicals
- C07D213/84—Nitriles
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- 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
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Abstract
本发明公开了一种合成3‑氟‑2‑氨基异烟腈的方法,所述方法以2‑氯‑3‑氟吡啶(化合物I)为起始原料,经锂化反应、缩醛反应、C‑N偶联反应、水解反应、肟化反应、肟酯化反应、催化脱羧酸反应等步骤得到目标产物3‑氟‑2‑氨基异烟腈(化合物IX)。本发明优化了3‑氟‑2‑氨基异烟腈的合成工艺,显著提高了收率和纯度,为3‑氟‑2‑氨基异烟腈作为基础医药原材料的工业化生产创造了条件。
Description
技术领域
本发明属于精细化工领域,涉及一种基础医药原材料的合成方法,具体涉及一种合成3-氟-2-氨基异烟腈的方法。
背景技术
吡啶,是含有氮杂原子的六元杂环化合物,与苯相似,具有相同的电子结构,天然存在于煤焦油、页岩油、煤气及石油中。吡啶类化合物作为一种重要的精细化工原料,是目前杂环化合物中开发应用范围最广的品种之一。吡啶类衍生物主要有烷基吡啶、卤代吡啶、氨基吡啶、溴吡啶、甲基吡啶、碘吡啶、氯吡啶、硝基吡啶、羟基吡啶、苄基吡啶、乙基吡啶、氰基吡啶、氟吡啶、二氢吡啶等。其中,吡啶类农药占吡啶系列产品消费总量的50%左右,作为饲料添加剂的吡啶类化合物占比约为30%,医药及其他领域的吡啶类化合物占比约为20%。
异烟肼,又名4-吡啶甲酰肼、异烟酸肼,是异烟酸的酰肼,在生物医药领域具有广泛的用途。在吡啶类衍生物合成方面,专利CN201910982605.8公开了3-氟-2-三氟甲基异烟酸的合成方法。3-氟-2-氨基异烟腈作为医药原材料具有一定的应用价值,其现有合成路线有待优化。
发明内容
本发明的目的在于优化3-氟-2-氨基异烟腈的合成工艺,为该基础医药原材料的广泛应用提供产业化支撑。
为了实现上述目的,本发明提供了一种合成3-氟-2-氨基异烟腈的方法,并给出了合成技术路线。具体地,本发明以2-氯-3-氟吡啶(化合物I)为原料,经锂化(代)反应得到化合物II,化合物II经缩醛反应得到化合物III,化合物III经C-N偶联反应得到化合物IV,化合物IV经水解反应得到化合物V,化合物V经成肟反应得到化合物VI,化合物VI经酯化反应得到化合物VII,化合物VII经催化脱羧酸反应得到化合物VIII,化合物VIII经水解脱PMB保护得到目标产物3-氟-2-氨基异烟腈(化合物IX)。
由此本领域普通技术人员易于知晓,本发明所涉及的合成方法共八步,进一步的实施方式包括:
步骤1),将所述化合物I溶于有机溶剂中,分别依次滴加烷基锂试剂和酰基化试剂,反应完全后,淬灭,得到化合物II;
步骤2),向甲苯-催化剂体系中滴加所述化合物II和羰基保护试剂,反应液用减液洗涤,得到化合物III-甲苯的混合溶液;
步骤3),向所述化合物III-甲苯的混合溶液中加入Pd催化剂、Pd催化剂配体和碱,得到化合物IV;
步骤4),将化合物IV加入酸溶液中水解,得到化合物V;
步骤5),将所述化合物V溶于有机溶剂中,加入盐酸羟胺和无机碱,反应得到化合物VI;
步骤6),化合物VI酯化反应得到化合物VII;
步骤7),将所述化合物VII溶于有机溶剂中,加入三氯化铁、BHT,反应得到化合物VIII;
步骤8),化合物VIII酸解后,加入无机碱,得到目标化合物IX。
上述步骤1)-8)为制备3-氟-2-氨基异烟腈的优化合成路线,现对本发明所述方法每一步骤涉及的物料、反应条件、操作流程等作出详细的阐述。
如上所述步骤1),以2-氯-3-氟吡啶(化合物I)为原料,将化合物I溶于有机溶剂中,控制化合物I-有机溶剂混合体系的温度为-85℃~-80℃;向化合物I-有机溶剂混合体系中缓慢滴加烷基锂试剂,保持反应温度为-85℃~-80℃,搅拌反应1.5h后,控制温度85℃~-80℃;再向反应体系中滴加酰基化试剂,保持反应温度为-85℃~-80℃,搅拌反应完全后,将反应体系加入到酸溶液(优选为稀盐酸溶液)中淬灭,有机相经干燥、浓缩,得到化合物II。
作为步骤1)优选的实施方式,所述有机溶剂可以为四氢呋喃,但不作为步骤1)所述有机溶剂的特别的限定,其它可以实现本发明并能溶解2-氯-3-氟吡啶(化合物I)的有机溶剂均可选用。同样地,所述烷基锂试剂选用甲基锂、乙基锂、丙基锂、异丙基锂、正丁基锂、仲丁基锂、叔丁基锂、戊基锂、己基锂、环己基锂、叔辛基锂、正二十烷基锂、丁基环己基锂中的一种或多种,所述化合物I和烷基锂试剂的摩尔比为1:(1.1~1.3),进一步优选地,烷基锂试剂可以是正丁基锂。所述酰基化试剂选用DMF、甲酸甲酯、甲酸乙酯中的一种或多种,所述化合物I和酰基化试剂的摩尔比为1:(1.2~1.4),进一步优选地,酰基化试剂可以是甲酸乙酯。
需要注意的是,酰基化试剂的选用应充分考虑减少杂质的引入,提高目标产物的收率。另外,考虑到化合物II的稳定性较差,本发明优选采用稀盐酸溶液淬灭反应体系,采用酸性体系减压浓缩的方式,确保化合物II的稳定性,为下步反应的实施创造条件。
如上所述步骤2),向甲苯-催化剂体系中滴加化合物II和羰基保护试剂。需要特别注意的是,化合物II的稳定性较差,温度对化合物II的稳定性有着直接的影响。鉴于此,需要准确控制甲苯-催化剂体系的温度为90℃~92℃,避免化合物II结构改变及副产物的生成。在搅拌条件下,所述化合物II和羰基保护试剂的反应温度为100℃~102℃,反应完全后,反应体系的温度控制在35℃~40℃,向反应体系中滴加无机碱溶液洗涤、水洗浓缩得到化合物III-甲苯的混合溶液。
作为步骤2)优选的实施方式,所述羰基保护试剂选用甲醇、乙醇、乙二醇、1.3-丙二醇、硫代甲醇、硫代乙醇、乙二硫醇、1.3-硫代丙二醇、原甲酸三乙酯中的一种或多种,所述化合物II和羰基保护试剂的摩尔比为1:(1.0~1.2),进一步优选地,所述羰基保护试剂可以是乙二醇。所述甲苯-催化剂体系中的催化剂选用对甲苯磺酸、三氟甲磺酸、浓硫酸、三氟化硼-乙醚、氯化锌、三氟乙酸锌中的一种或多种,所述化合物II和催化剂的摩尔比为1:(0.05~0.1)。步骤2)中,所述的无机碱为氢氧化钠、氢氧化钾、碳酸钠、叔丁醇钠中的一种或多种,按摩尔比计,所述化合物II和无机碱的比例为1:(0.1~0.5)。
如上所述步骤3),向化合物III-甲苯的混合溶液中分别添加Pd催化剂、Pd催化剂配体和强碱,控制温度95℃~100℃,反应完全后,反应液经水洗、干燥、过柱、浓缩、重结晶得到化合物IV。
作为步骤3)优选的实施方式,所述Pd催化剂选用醋酸钯、三(二亚苄基丙酮)二钯、[1,1-双(二苯基膦基)二茂铁]二氯化钯中的一种或多种,所述化合物III和Pd催化剂的摩尔比为1:(0.005~0.05)。所述Pd催化剂配体选用BINAP、XPhos、SPhos中的一种或多种,所述化合物III和Pd催化剂配体的摩尔比为1:(0.015~0.15)。本步骤所用的强碱可以为有机强碱或无机强碱,优选为叔丁醇钠、叔丁醇钾、碳酸钠、碳酸钾、碳酸铯中的一种或多种,所述化合物III和所述碱的摩尔比为1:(1.5~2.5)。
如上所述步骤4),是将化合物IV在特定条件下进行水解反应。本步骤采用稀强酸进行水解,稀强酸水溶液的浓度为1mol/L~10mol/L。优选地,所述强酸选用浓盐酸、甲酸、三氟乙酸中的一种或多种。按摩尔比计,化合物IV与强酸的比例是1:(1.5~2.5),水解反应的温度控制为55℃~60℃,搅拌反应完全后,加入二氯甲烷,滴加无机碱的水溶液,有机相经水洗、干燥、浓缩后得到化合物V。优选地,步骤4)所述的无机碱为氢氧化钠、氢氧化钾、碳酸钠、碳酸钾、碳酸氢钾、碳酸氢钠中的一种或多种,按摩尔比计,化合物IV与无机碱的比例是1:(1.5~2.5)。
需要注意的是,化合物IV具有两个反应位点,且反应同时发生,采用步骤4)所述方法可以将副产物的占比控制在10%以下,有效的提高了目标产物的收率。
如上所述步骤5),将所述化合物V溶于有机溶剂中,所述有机溶剂优选为二氯甲烷或四氢呋喃,再分别加入盐酸羟胺和无机碱,控制温度20℃~35℃,反应完全后,反应液经干燥浓缩后得到化合物VI。按摩尔比计,化合物V和盐酸羟胺的比例为1:(1.1~2)。所述无机碱选用碳酸钾、氢氧化钠、氢氧化钾、碳酸钠中的一种或多种,按摩尔比计,化合物V和无机碱的比例为1:(1.5~3)。
如上所述步骤6),化合物VI酯化反应得到化合物VII。具体地,将化合物VI、乙酸酐溶于甲苯溶剂中,控制反应温度至体系回流(100℃~105℃),搅拌反应完全后,反应液经碱溶液洗涤,水洗、干燥后得到化合物VII-甲苯混合溶液。优选地,所述的化合物VI与乙酸酐的摩尔比为1:(1.0~1.5)。本步骤所述的碱为碳酸钾、氢氧化钠、氢氧化钾、碳酸钠中的一种或多种,按摩尔比计,化合物V和无机碱的比例为1:(1.5~2.0)。
需要注意的是,化合物VI具有两个反应位点,且反应同时发生,采用步骤6)所述方法精准控制乙酸酐的用量,避免杂质的生成,有效的提高了目标产物的收率。
如上所述步骤7),将所述化合物VII溶于有机溶剂中,加入三氯化铁、BHT,反应得到化合物VIII。本步骤的有机溶剂选用甲苯,将化合物VII溶于甲苯形成化合物VII-甲苯混合溶液,控制温度100℃~105℃,反应液经无机碱洗涤,水洗、干燥浓缩、柱层析纯化后得到化合物VIII。按摩尔比计,化合物VII与三氯化铁的比例为1:(0.02~0.1),化合物VII与BHT的比例为1:(0.02~0.1)。
如上所述步骤8),化合物VIII酸解,所需的酸选用浓盐酸、浓硫酸、三氟乙酸、氢氟酸、甲酸中的一种或多种,化合物VIII与强酸的摩尔比为1:(2~5)。本步骤所用无机碱为氢氧化钠、氢氧化钾、碳酸钠、碳酸钾、碳酸氢钠、碳酸氢钾中的一种或多种,化合物VIII与无机碱的摩尔比为1:(1.5~2)。
与现有技术相比,本发明所述方法具有如下的有益效果或优点。
本发明提供了3-氟-2-氨基异烟腈的新的合成技术路线,其以2-氯-3-氟吡啶(化合物I)为起始原料,经锂化反应、缩醛反应、C-N偶联反应、水解反应、肟化反应、肟酯化反应、催化脱羧酸反应等步骤得到目标产物。采用本发明方法制备的3-氟-2-氨基异烟腈为浅黄色至土黄色固体,易溶于四氢呋喃,微溶于乙酸乙酯、二氯甲烷。本发明优化了3-氟-2-氨基异烟腈的合成工艺,显著提高了收率和纯度,为3-氟-2-氨基异烟腈作为基础医药原材料的工业化生产创造了条件。
附图说明
下面通过附图结合实施例具体描述本发明,其中附图所示内容仅用于对本发明的解释说明,而不构成对本发明任何意义上的限制。
图1是本发明实施例化合物II的LC图谱;
图2是本发明实施例化合物IV的GC图谱;
图3是本发明实施例化合物V的GC图谱;
图4是本发明实施例化合物VI的LC图谱;
图5是本发明实施例化合物VIII的LC图谱;
图6是本发明实施例化合物IX的LC图谱;
图7是本发明实施例化合物IX的1HNMR谱图。
具体实施方式
以下结合具体实施例,对本发明的具体实施方案做详细的阐述。应理解,这些实施例仅用于说明本发明而不用于限制本发明的范围,本发明的保护范围以权利要求为准,包括在此基础上所作出的显而易见的变化或变动等。
化合物II的制备:向3000mL四氢呋喃中加入化合物中I(200g,1.52mol),在-85℃~-80℃下向反应体系中滴加正丁基锂(2mol/L正己烷溶液,900mL,1.82mol),搅拌1.5h后,往体系滴加甲酸乙酯(146g,1.98mol),之后搅拌反应2h,反应结束后,将反应液加入至2mol/L稀盐酸溶液中淬灭至水相pH=2~4,分液,水相用二氯甲烷(500mL×2)萃取,有机相合并加入无水硫酸镁干燥,之后有机相浓缩得红棕色油状液体化合物II:250g,收率95%,LC含量(图1):93.49%。
化合物III的制备:向2500mL甲苯溶液中加入对甲苯磺酸(11.54g,0.067mol),在90℃~92℃下,往体系同时滴加化合物II(208g,1.57mol)和乙二醇,滴加完毕后,体系升温至100℃~102℃,搅拌反应4h后,反应体系降温至35℃~40℃,用碳酸钠水溶液洗涤一遍,水洗涤一遍,之后用无水硫酸镁干燥,过滤得到化合物III-甲苯混合溶液,连投下一步反应。
化合物IV的制备:氩气保护下,往化合物III-甲苯混合溶液中加入4-甲氧基苄胺(215.97g,1.57mol),醋酸钯(0.59g,2.6mmol),BINAP(4.90g,7.9mmol),叔丁醇钠(252.2g,2.62mol),在95℃~100℃下,搅拌反应4h,反应结束后,反应液水洗一遍,有机相干燥,过柱,过柱液减压浓缩至油状,加入正己烷-甲苯(3mL:5mL)的混合溶液863mL,搅拌下析出固体,过滤得淡黄色化合物IV:350g,收率88.07%,GC含量(图2):96.05%。
化合物V的制备:向1104mL2mol/L稀盐酸溶液中加入化合物IV(350,1.15mol),在55℃~60℃下,搅拌反应7h后,控制温度25℃~30℃,往体系滴加10%碳酸钠溶液,搅拌1h,加入二氯甲烷(1750mL×3)萃取,有机相干燥,浓缩至体系为固液状态时,加入正己烷1500mL,搅拌析出固体,搅拌2h后,过滤得到淡黄色固体化合物V:264.83g,收率:85%,GC含量(图3):84.67%。
化合物VI的制备:向764.5mL四氢呋喃中,加入化合物V(254.0g,0.95mol),盐酸羟胺(72.61g,1.04mol),乙酸钠(116g,1.41mol),255mL水,室温搅拌反应4h后,将反应液分液,有机相浓缩至油状,加入510mL甲苯,搅拌2h,析出固体,过滤,得到淡黄色固体化合物VI:220g,收率:84%,LC含量(图4):89.02%。
化合物VII的制备:向1970mL甲苯中加入化合物VI(175g,0.72mol)和乙酸酐(73.94g,0.72mol),在100℃~102℃下,搅拌反应2h后,控制温度25℃~30℃,往体系滴加10%碳酸钠溶液,搅拌1h,有机相加入水洗一遍,有机相干燥,得到化合物VII-甲苯甲苯混合液,待投下一步反应。
化合物VIII的制备:向化合物VII-甲苯混合溶液中,加入三氯化铁(11.59g,0.072mol)和BHT(15.76g,0.072mol),在100℃~102℃下,搅拌反应2h后,反应液降温至室温后,硅藻土过滤,滤液加入滴加10%碳酸钠溶液,搅拌1h,有机相加入水洗一遍,有机相干燥,减压浓缩至油状,柱色谱(乙酸乙酯/正己烷)纯化,得到黄色固体:120.07g,收率:65.22%,LC含量(图5):97.87%。
化合物IX的制备:向1000mL甲苯中加入化合物VIII(100g,0.39mol)和三氟乙酸(221.80g,1.95mol),在80℃~85℃下,搅拌反应3h,将反应液负压浓缩,得到化合物IV的三氟乙酸盐固体,向10%碳酸钠溶液中加入化合物IV三氟乙酸盐,搅拌1h后,过滤,所得固体加入到四氢呋喃溶液中,搅拌溶解,过5μ滤膜,滤液浓缩至固液状,加入甲苯溶剂,搅拌析出固体,得到淡黄色固体化合物IX:44.25g,收率83.02%,LC含量(图6):99.71%,核磁见图7。
以上实施例的说明只是用于帮助理解本发明的方法及其核心思想。应当指出,对于本领域的普通技术人员来说,在不脱离本发明原理的前提下,还可以对本发明进行若干改进和修饰,这些改进和修饰也落入本发明的保护范围内。
Claims (1)
1.一种合成3-氟-2-氨基异烟腈的方法,其特征在于,所述方法的路线如下:
;
所述方法包括:
步骤1),将所述化合物I溶于有机溶剂中,分别依次滴加烷基锂试剂和酰基化试剂,反应完全后,淬灭,得到化合物II;
步骤2),向甲苯-催化剂体系中滴加所述化合物II和羰基保护试剂,反应液用减液洗涤,得到化合物III-甲苯的混合溶液;
步骤3),向所述化合物III-甲苯的混合溶液中加入Pd催化剂、Pd催化剂配体和碱,得到化合物IV;
步骤4),将化合物IV加入酸溶液中水解,得到化合物V;
步骤5),将所述化合物V溶于有机溶剂中,加入盐酸羟胺和无机碱,反应得到化合物VI;
步骤6),化合物VI酯化反应得到化合物VII;
步骤7),将所述化合物VII溶于有机溶剂中,加入三氯化铁、BHT,反应得到化合物VIII;
步骤8),化合物VIII酸解后,加入无机碱,得到目标化合物IX;
在步骤1)中,化合物I经锂化反应、酰基化反应合成化合物II;
所述锂化反应选用烷基锂试剂正丁基锂,所述化合物I和烷基锂试剂的摩尔比为1:(1.1~1.3);
所述酰基化反应选用酰基化试剂甲酸乙酯,所述化合物I和酰基化试剂的摩尔比为1:(1.2~1.4);
在步骤2)中,所述化合物II和在羰基保护试剂在甲苯-催化剂体系中合成化合物III;
所述羰基保护试剂选用乙二醇,所述化合物II和羰基保护试剂的摩尔比为1:(1.0~1.2);
所述甲苯-催化剂体系中的催化剂选用对甲苯磺酸,所述化合物II和催化剂的摩尔比为1:(0.05~0.1);
在步骤3)中,所述Pd催化剂选用醋酸钯,所述化合物III和Pd催化剂的摩尔比为1:(0.005~0.05);
所述Pd催化剂配体选用BINAP,所述化合物III和Pd催化剂配体的摩尔比为1:(0.015~0.15);
所述碱选用叔丁醇钠,所述化合物III和所述碱的摩尔比为1:(1.5~2.5);
在步骤4)中,所述化合物IV与酸水解反应所用酸的摩尔比为1:(1.5~2.5),控制温度55℃~60℃;
在步骤5)中,所述化合物V与盐酸羟胺的摩尔比为1:(1.1~2);
在步骤6)中,所述酯化反应选用的试剂为乙酸酐,所述化合物VI与乙酸酐的摩尔比为1:(1.0~1.5);
在步骤7)中,所述化合物VII分别与三氯化铁、BHT的摩尔比均为1:(0.02~0.1);
在步骤8)中,所述化合物VIII酸解在甲苯中进行,控制温度80℃~85℃,所用酸选用三氟乙酸,所述化合物VIII与所用酸的摩尔比为1:(2~5)。
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