WO2005003077A1 - Verfahren zum herstellen von difluoracetessigsäurealkylestern - Google Patents
Verfahren zum herstellen von difluoracetessigsäurealkylestern Download PDFInfo
- Publication number
- WO2005003077A1 WO2005003077A1 PCT/EP2004/006607 EP2004006607W WO2005003077A1 WO 2005003077 A1 WO2005003077 A1 WO 2005003077A1 EP 2004006607 W EP2004006607 W EP 2004006607W WO 2005003077 A1 WO2005003077 A1 WO 2005003077A1
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- WO
- WIPO (PCT)
- Prior art keywords
- formula
- alkyl
- acid
- ethyl
- mol
- Prior art date
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- 238000004519 manufacturing process Methods 0.000 title abstract description 5
- 239000002253 acid Substances 0.000 claims abstract description 16
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 12
- 239000001257 hydrogen Substances 0.000 claims abstract description 12
- 150000002081 enamines Chemical class 0.000 claims abstract description 10
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 8
- 150000001412 amines Chemical class 0.000 claims abstract description 7
- 238000000034 method Methods 0.000 claims description 50
- -1 alkyl chlorodifluoroacetic acid Chemical compound 0.000 claims description 25
- 238000002360 preparation method Methods 0.000 claims description 18
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 15
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 claims description 14
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 12
- 239000003085 diluting agent Substances 0.000 claims description 11
- 150000002148 esters Chemical class 0.000 claims description 10
- 125000001449 isopropyl group Chemical group [H]C([H])([H])C([H])(*)C([H])([H])[H] 0.000 claims description 10
- 125000000217 alkyl group Chemical group 0.000 claims description 9
- 150000001875 compounds Chemical class 0.000 claims description 9
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 claims description 9
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 7
- AQSJGOWTSHOLKH-UHFFFAOYSA-N phosphite(3-) Chemical class [O-]P([O-])[O-] AQSJGOWTSHOLKH-UHFFFAOYSA-N 0.000 claims description 5
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 4
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 4
- 150000002431 hydrogen Chemical class 0.000 claims description 4
- 239000007858 starting material Substances 0.000 claims description 3
- 230000007062 hydrolysis Effects 0.000 claims description 2
- 238000006460 hydrolysis reaction Methods 0.000 claims description 2
- 238000006243 chemical reaction Methods 0.000 abstract description 12
- 125000004178 (C1-C4) alkyl group Chemical group 0.000 abstract 2
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 18
- 239000000203 mixture Substances 0.000 description 17
- WEVYAHXRMPXWCK-UHFFFAOYSA-N Acetonitrile Chemical compound CC#N WEVYAHXRMPXWCK-UHFFFAOYSA-N 0.000 description 15
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 13
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 12
- UAOMVDZJSHZZME-UHFFFAOYSA-N diisopropylamine Chemical compound CC(C)NC(C)C UAOMVDZJSHZZME-UHFFFAOYSA-N 0.000 description 12
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 9
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Natural products CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 8
- BZLVMXJERCGZMT-UHFFFAOYSA-N Methyl tert-butyl ether Chemical compound COC(C)(C)C BZLVMXJERCGZMT-UHFFFAOYSA-N 0.000 description 8
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 8
- 239000012043 crude product Substances 0.000 description 7
- 238000004821 distillation Methods 0.000 description 7
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 6
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 6
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 description 6
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 6
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 6
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 6
- JFDZBHWFFUWGJE-UHFFFAOYSA-N benzonitrile Chemical compound N#CC1=CC=CC=C1 JFDZBHWFFUWGJE-UHFFFAOYSA-N 0.000 description 6
- MVPPADPHJFYWMZ-UHFFFAOYSA-N chlorobenzene Chemical compound ClC1=CC=CC=C1 MVPPADPHJFYWMZ-UHFFFAOYSA-N 0.000 description 6
- ZCSHNCUQKCANBX-UHFFFAOYSA-N lithium diisopropylamide Chemical compound [Li+].CC(C)[N-]C(C)C ZCSHNCUQKCANBX-UHFFFAOYSA-N 0.000 description 6
- 239000000047 product Substances 0.000 description 6
- 239000011780 sodium chloride Substances 0.000 description 6
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 5
- ILOXLVPMINVBMG-UHFFFAOYSA-N ethyl 4-chloro-4,4-difluoro-3-oxobutanoate Chemical compound CCOC(=O)CC(=O)C(F)(F)Cl ILOXLVPMINVBMG-UHFFFAOYSA-N 0.000 description 5
- 239000012071 phase Substances 0.000 description 5
- 229910052938 sodium sulfate Inorganic materials 0.000 description 5
- 235000011152 sodium sulphate Nutrition 0.000 description 5
- XTHFKEDIFFGKHM-UHFFFAOYSA-N Dimethoxyethane Chemical compound COCCOC XTHFKEDIFFGKHM-UHFFFAOYSA-N 0.000 description 4
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 4
- IMNFDUFMRHMDMM-UHFFFAOYSA-N N-Heptane Chemical compound CCCCCCC IMNFDUFMRHMDMM-UHFFFAOYSA-N 0.000 description 4
- RDOXTESZEPMUJZ-UHFFFAOYSA-N anisole Chemical compound COC1=CC=CC=C1 RDOXTESZEPMUJZ-UHFFFAOYSA-N 0.000 description 4
- 238000009835 boiling Methods 0.000 description 4
- NNBZCPXTIHJBJL-UHFFFAOYSA-N decalin Chemical compound C1CCCC2CCCCC21 NNBZCPXTIHJBJL-UHFFFAOYSA-N 0.000 description 4
- 229940043279 diisopropylamine Drugs 0.000 description 4
- UIYYAEPLUOQNOI-UHFFFAOYSA-N ethyl 3-[di(propan-2-yl)amino]-4,4-difluorobut-3-enoate Chemical compound CCOC(=O)CC(=C(F)F)N(C(C)C)C(C)C UIYYAEPLUOQNOI-UHFFFAOYSA-N 0.000 description 4
- CBDPWKVOPADMJC-UHFFFAOYSA-N ethyl 4,4-difluoro-3-oxobutanoate Chemical compound CCOC(=O)CC(=O)C(F)F CBDPWKVOPADMJC-UHFFFAOYSA-N 0.000 description 4
- 239000012535 impurity Substances 0.000 description 4
- UAEPNZWRGJTJPN-UHFFFAOYSA-N methylcyclohexane Chemical compound CC1CCCCC1 UAEPNZWRGJTJPN-UHFFFAOYSA-N 0.000 description 4
- 239000000376 reactant Substances 0.000 description 4
- 238000010992 reflux Methods 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 150000001408 amides Chemical class 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- GZKHDVAKKLTJPO-UHFFFAOYSA-N ethyl 2,2-difluoroacetate Chemical compound CCOC(=O)C(F)F GZKHDVAKKLTJPO-UHFFFAOYSA-N 0.000 description 3
- GVCAWQUJCHZRCB-UHFFFAOYSA-N ethyl 2-chloro-2,2-difluoroacetate Chemical compound CCOC(=O)C(F)(F)Cl GVCAWQUJCHZRCB-UHFFFAOYSA-N 0.000 description 3
- JFFDDZNQLGYZPR-UHFFFAOYSA-N ethyl 3-dimethoxyphosphoryloxy-4,4-difluorobut-3-enoate Chemical compound CCOC(=O)CC(=C(F)F)OP(=O)(OC)OC JFFDDZNQLGYZPR-UHFFFAOYSA-N 0.000 description 3
- 239000012074 organic phase Substances 0.000 description 3
- 150000003462 sulfoxides Chemical class 0.000 description 3
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 3
- LZDKZFUFMNSQCJ-UHFFFAOYSA-N 1,2-diethoxyethane Chemical compound CCOCCOCC LZDKZFUFMNSQCJ-UHFFFAOYSA-N 0.000 description 2
- RYHBNJHYFVUHQT-UHFFFAOYSA-N 1,4-Dioxane Chemical compound C1COCCO1 RYHBNJHYFVUHQT-UHFFFAOYSA-N 0.000 description 2
- WFDIJRYMOXRFFG-UHFFFAOYSA-N Acetic anhydride Chemical compound CC(=O)OC(C)=O WFDIJRYMOXRFFG-UHFFFAOYSA-N 0.000 description 2
- WDJHALXBUFZDSR-UHFFFAOYSA-N Acetoacetic acid Natural products CC(=O)CC(O)=O WDJHALXBUFZDSR-UHFFFAOYSA-N 0.000 description 2
- 0 COP(OC)(OC(CC(*)=O)=C(F)F)=O Chemical compound COP(OC)(OC(CC(*)=O)=C(F)F)=O 0.000 description 2
- XDTMQSROBMDMFD-UHFFFAOYSA-N Cyclohexane Chemical compound C1CCCCC1 XDTMQSROBMDMFD-UHFFFAOYSA-N 0.000 description 2
- ZAFNJMIOTHYJRJ-UHFFFAOYSA-N Diisopropyl ether Chemical compound CC(C)OC(C)C ZAFNJMIOTHYJRJ-UHFFFAOYSA-N 0.000 description 2
- IAZDPXIOMUYVGZ-UHFFFAOYSA-N Dimethylsulphoxide Chemical compound CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 description 2
- FXHOOIRPVKKKFG-UHFFFAOYSA-N N,N-Dimethylacetamide Chemical compound CN(C)C(C)=O FXHOOIRPVKKKFG-UHFFFAOYSA-N 0.000 description 2
- MZRVEZGGRBJDDB-UHFFFAOYSA-N N-Butyllithium Chemical compound [Li]CCCC MZRVEZGGRBJDDB-UHFFFAOYSA-N 0.000 description 2
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 description 2
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 2
- KEAYESYHFKHZAL-UHFFFAOYSA-N Sodium Chemical compound [Na] KEAYESYHFKHZAL-UHFFFAOYSA-N 0.000 description 2
- WQDUMFSSJAZKTM-UHFFFAOYSA-N Sodium methoxide Chemical compound [Na+].[O-]C WQDUMFSSJAZKTM-UHFFFAOYSA-N 0.000 description 2
- 238000005903 acid hydrolysis reaction Methods 0.000 description 2
- 125000002723 alicyclic group Chemical group 0.000 description 2
- 125000001931 aliphatic group Chemical group 0.000 description 2
- 125000005907 alkyl ester group Chemical group 0.000 description 2
- 239000008346 aqueous phase Substances 0.000 description 2
- 150000004945 aromatic hydrocarbons Chemical class 0.000 description 2
- 239000002585 base Substances 0.000 description 2
- KVNRLNFWIYMESJ-UHFFFAOYSA-N butyronitrile Chemical compound CCCC#N KVNRLNFWIYMESJ-UHFFFAOYSA-N 0.000 description 2
- 150000002085 enols Chemical group 0.000 description 2
- 150000002170 ethers Chemical class 0.000 description 2
- 125000004494 ethyl ester group Chemical group 0.000 description 2
- 238000004128 high performance liquid chromatography Methods 0.000 description 2
- LRDFRRGEGBBSRN-UHFFFAOYSA-N isobutyronitrile Chemical compound CC(C)C#N LRDFRRGEGBBSRN-UHFFFAOYSA-N 0.000 description 2
- 125000000468 ketone group Chemical group 0.000 description 2
- UZKWTJUDCOPSNM-UHFFFAOYSA-N methoxybenzene Substances CCCCOC=C UZKWTJUDCOPSNM-UHFFFAOYSA-N 0.000 description 2
- GYNNXHKOJHMOHS-UHFFFAOYSA-N methyl-cycloheptane Natural products CC1CCCCCC1 GYNNXHKOJHMOHS-UHFFFAOYSA-N 0.000 description 2
- HDZGCSFEDULWCS-UHFFFAOYSA-N monomethylhydrazine Chemical compound CNN HDZGCSFEDULWCS-UHFFFAOYSA-N 0.000 description 2
- JIKUXBYRTXDNIY-UHFFFAOYSA-N n-methyl-n-phenylformamide Chemical compound O=CN(C)C1=CC=CC=C1 JIKUXBYRTXDNIY-UHFFFAOYSA-N 0.000 description 2
- 150000002825 nitriles Chemical class 0.000 description 2
- 239000003960 organic solvent Substances 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- FVSKHRXBFJPNKK-UHFFFAOYSA-N propionitrile Chemical compound CCC#N FVSKHRXBFJPNKK-UHFFFAOYSA-N 0.000 description 2
- 239000011541 reaction mixture Substances 0.000 description 2
- 235000017557 sodium bicarbonate Nutrition 0.000 description 2
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 2
- 239000012312 sodium hydride Substances 0.000 description 2
- 229910000104 sodium hydride Inorganic materials 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- HXJUTPCZVOIRIF-UHFFFAOYSA-N sulfolane Chemical compound O=S1(=O)CCCC1 HXJUTPCZVOIRIF-UHFFFAOYSA-N 0.000 description 2
- 150000003457 sulfones Chemical class 0.000 description 2
- HVZJRWJGKQPSFL-UHFFFAOYSA-N tert-Amyl methyl ether Chemical compound CCC(C)(C)OC HVZJRWJGKQPSFL-UHFFFAOYSA-N 0.000 description 2
- YUKQRDCYNOVPGJ-UHFFFAOYSA-N thioacetamide Chemical compound CC(N)=S YUKQRDCYNOVPGJ-UHFFFAOYSA-N 0.000 description 2
- DLFVBJFMPXGRIB-UHFFFAOYSA-N thioacetamide Natural products CC(N)=O DLFVBJFMPXGRIB-UHFFFAOYSA-N 0.000 description 2
- JOXIMZWYDAKGHI-UHFFFAOYSA-N toluene-4-sulfonic acid Chemical compound CC1=CC=C(S(O)(=O)=O)C=C1 JOXIMZWYDAKGHI-UHFFFAOYSA-N 0.000 description 2
- CYTQBVOFDCPGCX-UHFFFAOYSA-N trimethyl phosphite Chemical compound COP(OC)OC CYTQBVOFDCPGCX-UHFFFAOYSA-N 0.000 description 2
- PXXNTAGJWPJAGM-UHFFFAOYSA-N vertaline Natural products C1C2C=3C=C(OC)C(OC)=CC=3OC(C=C3)=CC=C3CCC(=O)OC1CC1N2CCCC1 PXXNTAGJWPJAGM-UHFFFAOYSA-N 0.000 description 2
- 239000008096 xylene Substances 0.000 description 2
- WSLDOOZREJYCGB-UHFFFAOYSA-N 1,2-Dichloroethane Chemical compound ClCCCl WSLDOOZREJYCGB-UHFFFAOYSA-N 0.000 description 1
- OCJBOOLMMGQPQU-UHFFFAOYSA-N 1,4-dichlorobenzene Chemical compound ClC1=CC=C(Cl)C=C1 OCJBOOLMMGQPQU-UHFFFAOYSA-N 0.000 description 1
- OTTXCOAOKOEENK-UHFFFAOYSA-N 2,2-difluoroethenone Chemical group FC(F)=C=O OTTXCOAOKOEENK-UHFFFAOYSA-N 0.000 description 1
- OAWAZQITIZDJRB-UHFFFAOYSA-N 2-chloro-2,2-difluoroacetic acid Chemical compound OC(=O)C(F)(F)Cl OAWAZQITIZDJRB-UHFFFAOYSA-N 0.000 description 1
- BWAFLSFSMHXWMF-UHFFFAOYSA-N 4-chloro-4,4-difluoro-3-oxobutanoic acid Chemical compound OC(=O)CC(=O)C(F)(F)Cl BWAFLSFSMHXWMF-UHFFFAOYSA-N 0.000 description 1
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 229930194542 Keto Natural products 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 239000004480 active ingredient Substances 0.000 description 1
- 229910000102 alkali metal hydride Inorganic materials 0.000 description 1
- 150000008046 alkali metal hydrides Chemical class 0.000 description 1
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 1
- 150000001342 alkaline earth metals Chemical class 0.000 description 1
- 150000003863 ammonium salts Chemical class 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 125000004432 carbon atom Chemical group C* 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- DMSZORWOGDLWGN-UHFFFAOYSA-N ctk1a3526 Chemical compound NP(N)(N)=O DMSZORWOGDLWGN-UHFFFAOYSA-N 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 229940117389 dichlorobenzene Drugs 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000003480 eluent Substances 0.000 description 1
- DBQADEWOFXYWHY-UHFFFAOYSA-N ethyl 2,2-dichloro-4,4-difluoro-3-oxobutanoate Chemical compound CCOC(=O)C(Cl)(Cl)C(=O)C(F)F DBQADEWOFXYWHY-UHFFFAOYSA-N 0.000 description 1
- KDVPGBVZKTVEIS-UHFFFAOYSA-N ethyl 2-(ethoxymethylidene)-4,4-difluoro-3-oxobutanoate Chemical compound CCOC=C(C(=O)C(F)F)C(=O)OCC KDVPGBVZKTVEIS-UHFFFAOYSA-N 0.000 description 1
- RGTIQKPWQJFGFH-UHFFFAOYSA-N ethyl 2-chloro-4,4-difluoro-3-oxobutanoate Chemical compound CCOC(=O)C(Cl)C(=O)C(F)F RGTIQKPWQJFGFH-UHFFFAOYSA-N 0.000 description 1
- XYIBRDXRRQCHLP-UHFFFAOYSA-N ethyl acetoacetate Chemical compound CCOC(=O)CC(C)=O XYIBRDXRRQCHLP-UHFFFAOYSA-N 0.000 description 1
- PQJJJMRNHATNKG-UHFFFAOYSA-N ethyl bromoacetate Chemical compound CCOC(=O)CBr PQJJJMRNHATNKG-UHFFFAOYSA-N 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- BDAGIHXWWSANSR-UHFFFAOYSA-N formic acid Substances OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 description 1
- 238000004508 fractional distillation Methods 0.000 description 1
- 230000000855 fungicidal effect Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 125000000623 heterocyclic group Chemical class 0.000 description 1
- GNOIPBMMFNIUFM-UHFFFAOYSA-N hexamethylphosphoric triamide Chemical compound CN(C)P(=O)(N(C)C)N(C)C GNOIPBMMFNIUFM-UHFFFAOYSA-N 0.000 description 1
- 150000004677 hydrates Chemical class 0.000 description 1
- 239000005457 ice water Substances 0.000 description 1
- 150000007529 inorganic bases Chemical class 0.000 description 1
- 239000000543 intermediate Substances 0.000 description 1
- 125000000959 isobutyl group Chemical group [H]C([H])([H])C([H])(C([H])([H])[H])C([H])([H])* 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 125000004108 n-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 150000007530 organic bases Chemical class 0.000 description 1
- PTMHPRAIXMAOOB-UHFFFAOYSA-N phosphoramidic acid Chemical compound NP(O)(O)=O PTMHPRAIXMAOOB-UHFFFAOYSA-N 0.000 description 1
- OJMIONKXNSYLSR-UHFFFAOYSA-N phosphorous acid Chemical compound OP(O)O OJMIONKXNSYLSR-UHFFFAOYSA-N 0.000 description 1
- LPNYRYFBWFDTMA-UHFFFAOYSA-N potassium tert-butoxide Chemical compound [K+].CC(C)(C)[O-] LPNYRYFBWFDTMA-UHFFFAOYSA-N 0.000 description 1
- 239000002243 precursor Substances 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000007363 ring formation reaction 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
- ODZPKZBBUMBTMG-UHFFFAOYSA-N sodium amide Chemical compound [NH2-].[Na+] ODZPKZBBUMBTMG-UHFFFAOYSA-N 0.000 description 1
- QDRKDTQENPPHOJ-UHFFFAOYSA-N sodium ethoxide Chemical compound [Na+].CC[O-] QDRKDTQENPPHOJ-UHFFFAOYSA-N 0.000 description 1
- 229940017704 sodium formaldehyde sulfoxylate dihydrate Drugs 0.000 description 1
- UCWBKJOCRGQBNW-UHFFFAOYSA-M sodium;hydroxymethanesulfinate;dihydrate Chemical compound O.O.[Na+].OCS([O-])=O UCWBKJOCRGQBNW-UHFFFAOYSA-M 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 125000001424 substituent group Chemical group 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C67/00—Preparation of carboxylic acid esters
- C07C67/30—Preparation of carboxylic acid esters by modifying the acid moiety of the ester, such modification not being an introduction of an ester group
- C07C67/313—Preparation of carboxylic acid esters by modifying the acid moiety of the ester, such modification not being an introduction of an ester group by introduction of doubly bound oxygen containing functional groups, e.g. carboxyl groups
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- 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
- C07C229/30—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 being acyclic and unsaturated
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C67/00—Preparation of carboxylic acid esters
- C07C67/30—Preparation of carboxylic acid esters by modifying the acid moiety of the ester, such modification not being an introduction of an ester group
- C07C67/333—Preparation of carboxylic acid esters by modifying the acid moiety of the ester, such modification not being an introduction of an ester group by isomerisation; by change of size of the carbon skeleton
- C07C67/343—Preparation of carboxylic acid esters by modifying the acid moiety of the ester, such modification not being an introduction of an ester group by isomerisation; by change of size of the carbon skeleton by increase in the number of carbon atoms
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C69/00—Esters of carboxylic acids; Esters of carbonic or haloformic acids
- C07C69/66—Esters of carboxylic acids having esterified carboxylic groups bound to acyclic carbon atoms and having any of the groups OH, O—metal, —CHO, keto, ether, acyloxy, groups, groups, or in the acid moiety
- C07C69/67—Esters of carboxylic acids having esterified carboxylic groups bound to acyclic carbon atoms and having any of the groups OH, O—metal, —CHO, keto, ether, acyloxy, groups, groups, or in the acid moiety of saturated acids
- C07C69/716—Esters of keto-carboxylic acids or aldehydo-carboxylic acids
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D231/00—Heterocyclic compounds containing 1,2-diazole or hydrogenated 1,2-diazole rings
- C07D231/02—Heterocyclic compounds containing 1,2-diazole or hydrogenated 1,2-diazole rings not condensed with other rings
- C07D231/10—Heterocyclic compounds containing 1,2-diazole or hydrogenated 1,2-diazole rings not condensed with other rings having two or three double bonds between ring members or between ring members and non-ring members
- C07D231/14—Heterocyclic compounds containing 1,2-diazole or hydrogenated 1,2-diazole rings not condensed with other rings having two or three double bonds between ring members or between ring members and non-ring members 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
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D277/00—Heterocyclic compounds containing 1,3-thiazole or hydrogenated 1,3-thiazole rings
- C07D277/02—Heterocyclic compounds containing 1,3-thiazole or hydrogenated 1,3-thiazole rings not condensed with other rings
- C07D277/20—Heterocyclic compounds containing 1,3-thiazole or hydrogenated 1,3-thiazole rings not condensed with other rings having two or three double bonds between ring members or between ring members and non-ring members
- C07D277/32—Heterocyclic compounds containing 1,3-thiazole or hydrogenated 1,3-thiazole rings not condensed with other rings having two or three double bonds between ring members or between ring members and non-ring members 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
- C07D277/56—Carbon atoms having three bonds to hetero atoms with at the most one bond to halogen
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
- C07F9/00—Compounds containing elements of Groups 5 or 15 of the Periodic Table
- C07F9/02—Phosphorus compounds
- C07F9/06—Phosphorus compounds without P—C bonds
- C07F9/08—Esters of oxyacids of phosphorus
- C07F9/09—Esters of phosphoric acids
- C07F9/113—Esters of phosphoric acids with unsaturated acyclic alcohols
Definitions
- the present invention relates to a new process for the preparation of alkyl 4,4-difluoroacetoacetic acid (alkyl 4,4-difluoro-3-oxobutamate) from alkyl 4-chloro-4,4-difluoroacetoacetate, which in turn is obtained from alkyl 2-chlorodifluoroacetate become.
- ethyl 4,4-difluoroacetoacetate can be obtained by reacting ethyl difluoroacetate with ethyl acetate in the presence of sodium trihydride (cf. Tetrahedron 2001, 57, 2689-2700).
- the yield of this reaction is very unsatisfactory at 25%.
- the acetoacetic acid ethyl ester obtained as a by-product is difficult to separate from the desired product.
- ethyl 4,4-difluoroacetoacetate can be prepared by the reaction of ethyl difluoroacetate with ethyl bromoacetate in the presence of zinc (cf. Tetrahedron 1996, 52, 119-130). With this process, too, the yields leave much to be desired.
- the object of the present invention was therefore to provide a new, economical process by which alkyl 4,4-difluoroacetoacetic acid ester can be obtained with a high overall yield and high purity.
- the present invention thus relates to a process for the preparation of 4,4-difluoroacetic acetic acid alkyl esters of the formula (I)
- R 1 represents C 1 -C 4 -alkyl, where the radicals R 1 can each be the same or different,
- R 2 and R 3 independently of one another for hydrogen or Ci- -alkyl or together for -CH 2 -CH 2 -0-CH 2 -CH 2 -, -CH 2 -CH 2 -S-CH 2 -CH 2 - or - CH 2 -CH 2 -N (R) -CH 2 -CH 2 -, R 4 represents hydrogen or C r C 8 -alkyl, optionally reacted in the presence of a diluent,
- the alkylphosphonic esters of the formula (IV) cannot be converted directly into the desired end product by acid hydrolysis; rather, decomposition is observed under these conditions. It is also surprising in the second step of the process according to the invention that the alkylphosphonic acid esters of the formula (TV) and an amine of the formula (V) do not give the desired 4,4-difluoroacetoacetic acid alkyl ester and the corresponding phosphoric acid amide, but the enarr ⁇ i of the formula (VT) and the ammonium salt of the phosphoric acid diester. This enamine in turn can be surprisingly easily converted into the 4,4-difluoroacetoacetic acid ester of the formula (1) by acid hydrolysis. It is not even necessary to isolate the name.
- the process according to the invention therefore overcomes the above-mentioned disadvantages of known production processes and provides alkyl 4,4-difluoroacetoacetic acid ester in high yield and high purity.
- the process also has the advantage that acetoacetic acid ester, which can be present as an impurity in 4-chloro-4,4-difluoroacetoacetic acid alkyl esters of the formula (IT), can be easily removed from the reaction mixture.
- Acetoacetic acid esters do not react during the reaction with trialkyl phosphites of the formula (DJ) and can therefore be removed by distillation from the alkylphosphonic acid esters of the formula (TV).
- the product of the process according to the invention is therefore understood to include not only 4,4-difluoroacetoacetic acid alkyl esters (in keto and enol form) but also the respective hydrate. Depending on the subsequent chemistry, either all three forms of the product or only certain forms can be implemented further (see below).
- the 4-chloro-4,4-difluoroacetoacetic acid alkyl esters of the formula (JJ) used as starting materials in the first step of process (a) according to the invention are known (cf. Journal of Fluorine Chemistry 1992, 56, 271-284; Huaxue Xuebao 1983. 41, 729-729 and Chemical Abstracts 12M, 100, Abstract No. 22308; EP-A 0 082252). They can be made, for example, by
- Trialkyl phosphites of the formula (IJT), amines of the formula (V), chlorodifluoroacetic acid alkyl esters of the formula (VTI) (for possible preparation see preparation examples) and the acetic acid alkyl esters of the formula (VM) are known synthetic chemicals.
- R is preferably C 1 -C 8 -alkyl, particularly preferably C 1 -C 6 -alkyl, very particularly preferably represents methyl, ethyl, n-, iso-propyl, n-, iso-, sec-, tert-butyl, and particularly preferably methyl or ethyl.
- trialkyl phosphites of the formula (IE) are used, in which R 1 can in each case be the same or different.
- R 1 preferably represents methyl, ethyl, n-, isopropyl, n-, iso-, sec-, tert-butyl, particularly preferably represents methyl or ethyl.
- Preferred alkylphoshonic acid esters are those compounds of the formula (IV) in which R has the meanings given above as preferred, particularly preferred, very particularly preferred or in particular very particularly preferred, and in which R 1 can in each case be the same or different and the above as has preferred or particularly preferred meanings.
- amines of the formula (V) are used in which R 2 and R 3 independently of one another are preferably hydrogen, CC 6 -alkyl or together for -CH 2 -CH 2 -0-CH 2 - CH 2 -, -CH 2 -CH 2 -S-CH 2 -CH 2 - or -CH 2 -CH 2 -N (R 4 ) -CH 2 -CH 2 -, particularly preferably for hydrogen, methyl, ethyl, n -, iso-propyl, n-, iso-, sec-, tert-butyl or together for -CH 2 -CH 2 -0-CH 2 -CH 2 -, very particularly preferably independently of one another for iso-propyl, iso-, sec-, tert-butyl or together are -CH 2 -CH 2 -0-CH 2 -CH 2 -, particularly preferably in each case are isopropyl.
- R 4 is preferably hydrogen or -CC 6 alkyl, particularly preferably hydrogen, methyl, ethyl, n-, iso-propyl, n-, iso-, sec- or tert-butyl.
- Preferred enamines are those compounds of the formula (VI) in which R has the meanings given above as preferred, particularly preferred ⁇ very particularly preferred or in particular very particularly preferred, and in which R 2 and R 3 have the meanings given above as preferred, particularly preferred or have very particularly preferably given meanings.
- the first step of process (a) according to the invention is generally carried out without further diluents.
- a diluent e.g. methylene chloride
- the first step of the method (a) according to the invention can be carried out within a relatively wide temperature range.
- temperatures from 10 ° C. to 50 ° C., preferably from 20 ° C. to 40 ° C., particularly preferably from 25 ° C. to 30 ° C.
- the reaction components are very particularly preferably reacted in the first step at 25 ° C. to 30 ° C. Subsequently, the reaction is allowed to continue at 40 ° C to 45 ° C and allowed to cool to room temperature.
- the response time is not critical and can be selected in a larger area depending on the batch size.
- the reactants are brought together over a period of up to 150 min, preferably up to 120 min, particularly preferably up to 90 min.
- the time for post-reaction is usually 3 hours, while cooling overnight (i.e. in about 16 hours).
- the processing takes place according to usual methods.
- the mixture is generally concentrated under reduced pressure and the product of this step is then obtained by distillation.
- 1 mol of 4-chloro-4,4-difluoroacetoacetic acid alkyl ester of the formula (IT) is generally employed between 0.5 mol and 5 mol, preferably between 0.5 mol and 3 Mol, particularly preferably between 1 mol and 2 mol, very particularly preferably between 1.2 mol and 1.7 mol of a trialkyl phosphite of the formula (DI).
- the second step of process (a) according to the invention is optionally carried out in the presence of a diluent.
- a diluent All inert organic solvents customary for such reactions can be used as diluents.
- Halogenated, aliphatic, alicyclic or aromatic hydrocarbons such as, for example, petroleum ether, hexane, heptane, cyclohexane, methylcyclohexane, benzene, toluene, xylene, decalin, chlorobenzene, di-, chlorobenzene or dichloromethane; Ethers such as diethyl ether, diisopropyl ether, methyl tert-butyl ether, methyl tert-amyl ether, dioxane, tetrahydrofuran, 1,2-dimethoxyethane, 1,2-diethoxyethane or anisole; Nitriles, such as acetonit
- the second step of method (a) according to the invention can be carried out within a relatively wide temperature range.
- temperatures from 10 ° C to 100 ° C preferably the reaction components are mixed at temperatures from 20 ° C to 30 ° C and then at 30 ° C to 100 ° C, preferably at 50 ° C to 75 ° C brought to reaction.
- the response time is not critical and depending on the size of the batch can be selected in a larger area.
- the reactants are brought together over a period of a few minutes to 60 minutes, preferably within 10 minutes to 30 minutes.
- the mixture is then left to react for several hours, preferably up to 24 hours, particularly preferably up to 20 hours.
- the processing takes place according to usual methods.
- the mixture is generally first cooled to room temperature, washed with sodium chloride solution and water, the crude product is dried and concentrated under reduced pressure.
- the enamine of the formula (VT) is then freed from further impurities by distillation.
- 1 mol of alkylphosphonic acid ester of the formula (TV) is generally employed between 2.5 mol and 5 mol, preferably between 3 mol and 5 mol, particularly preferably between 2 mol and 4 mol an amine of formula (V).
- the hydrolysis in the third step of process (a) according to the invention is carried out in the presence of an acid, preferably sulfuric acid, phosphoric acid or hydrochloric acid, which are in each case optionally diluted with water, particularly preferably hydrochloric acid, very particularly preferably mixtures of hydrochloric acid and water.
- an acid preferably sulfuric acid, phosphoric acid or hydrochloric acid
- water particularly preferably hydrochloric acid, very particularly preferably mixtures of hydrochloric acid and water.
- the third step of method (a) according to the invention can be carried out within a relatively wide temperature range. In general, temperatures from 10 ° C to 50 ° C, preferably at 20 ° C to 30 ° C. - o -
- the response time is not critical and can be selected in a larger area depending on the batch size.
- the reactants are brought together over a period of a few minutes to 60 minutes, preferably within 10 minutes to 30 minutes.
- the mixture is then left to react for several hours, preferably up to 24 hours, particularly preferably up to 20 hours.
- the processing takes place according to ' usual methods.
- the extraction is generally first carried out with a suitable solvent, washed with sodium chloride solution and sodium hydrogen carbonate solution, and the crude product is dried and concentrated under reduced pressure.
- the 4,4-difluoroacetoacetic acid alkyl esters of the formula (I) are then freed from further impurities by distillation.
- 1 mol of enamine of the formula (VT) is generally between 0.5 mol and 5 mol, preferably between 1 mol and 5 mol, particularly preferably between 1 mol and 2, 5 moles of acid.
- chlorodifluoroacetic acid alkyl esters of the formula (VH) and acetic acid alkyl esters of the formula (VTII) are used, in which R in each case preferably for C r Cg-alkyl 5, particularly preferably for C 1 -C 6 -alkyl, very particularly preferably for methyl, Ethyl, n-, iso-propyl, n-, iso-, sec-, tert-butyl, and particularly preferably methyl or ethyl.
- Process (b) according to the invention is carried out in the presence of a suitable base.
- suitable bases include, in particular, alkaline earth metal or alkali metal hydrides, amides, alcoholates, such as, for example, sodium hydride, sodium amide, lithium dumdiisopropyla id (LDA), sodium methylate, sodium ethylate, potassium tert-butoxide, particularly lithium diisopropylamide (LDA) and sodium hydride are preferred.
- Process (b) according to the invention is carried out in the presence of a diluent.
- a diluent All inert organic solvents customary for such reactions come as diluents
- Halogenated, aliphatic, alicyclic or aromatic hydrocarbons such as, for example, petroleum ether, hexane, heptane, cyclohexane, methylcyclohexane, benzene, toluene, xylene, decalin, chlorobenzene, dichlorobenzene or dichloromethane; Ethers such as diethyl ether, diisopropyl ether, methyl tert-butyl ether, methyl tert-amyl ether, dioxane, tetrahydrofuran, 1,2-dimethoxyethane, 1,2-diethoxyethane or anisole; Nitriles, such as, for example, acetonitrile, propionitrile, n- or isobutyronitrile or benzonitrile; Amides such as N, N-dimethylformamide, N, N-di- methylacetamide, N-methylform
- Process (b) according to the invention can be carried out within a relatively wide temperature range. In general, temperatures from -80 ° C to + 100 ° C, preferably at -70 ° C to 0 ° C.
- the response time is not critical and can be selected in a larger area depending on the batch size.
- the reactants are brought together over a period of a few minutes to 180 minutes, preferably within 10 minutes to 90 minutes.
- the mixture is then left to react for several hours, preferably up to 24 hours, particularly preferably up to 16 hours.
- the processing takes place according to usual methods. Usually neutralized first, the phases separated, washed with sodium chloride solution, the crude product dried and concentrated under reduced pressure. The 4-chloro-4,4-difiuoroacetoacetic acid alkyl esters of the formula (IT) are then freed from further impurities by distillation.
- 1 mol of alkyl chlorodifluoroacetate of the formula (VTT) is generally employed between 0.5 mol and 5 mol, preferably between 1 mol and 5 mol, particularly preferably between 1 mol and 2.5 Mol of alkyl acetate of the formula (VTTI).
- All steps of processes (a) and (b) according to the invention are generally carried out under normal pressure. However, it is also possible to carry out individual or all steps of the process according to the invention under increased or reduced pressure - generally between 0.1 bar and 50 bar, preferably between 1 bar and 10 bar.
- the 4,4-difluoroacetoacetic acid alkyl esters obtainable by process (a) according to the invention are valuable intermediates for the preparation of difluoromethyl-substituted pyrazolylcarboxylic acid or thiazolylcarboxylic acid derivatives, which in turn represent precursors of fungicidal active ingredients (cf. for example WO 02/08197 and DE -A 102 15 292).
- 4,4-difluoroacetoacetic acid alkyl esters can first be mixed with acetic acid anhydride and qrfho-formic acid trialkyl ester with very good yields (when using the ethyl ester of over
- the 4,4-difluoroacetoacetic acid alkyl esters can first be chlorinated, whereby the mono- and the dichlorinated product (alkyl 2,2-dichloro-4,4-difluoro-3-oxobutanoate and alkyl 2-chloro-4,4- difluoro-3-oxobutanoate), both of which can be reacted almost quantitatively with thioacetamide to give the 3-myM-difluo ⁇ nemyl-thiazole-5-carboxylic acid alkyl ester (cf. following scheme):
- Trimethylphosphite (232.0 g, 1.87 mol) is added dropwise at 25 ° C. to 30 ° C. to ice 4-chloro-4,4-difluoroacetoacetate (305.1 g, content 77.0%, 1.17 mol) within 90 min with ice-water cooling and gas evolution.
- the mixture is then stirred for 1 h at 30 ° C, then for 3 h at 40 ° C to 45 ° C.
- the mixture is cooled to room temperature (approx. 16 h) and concentrated under reduced pressure.
- the crude product is further purified by distillation.
- the aqueous phase is extracted twice with 2.3 l each of methyl tert-butyl ether.
- the combined organic phases are washed in each case 2.8 1 10% sodium chloride solution, 10% sodium hydrogen carbonate solution and another 10% sodium chloride solution, dried over sodium sulfate, filtered and concentrated under reduced pressure.
- the crude product is purified by distillation. 1179 g (92%, 76.6% of theory) of ethyl 4,4-difluoroacetoacetate are obtained.
- the residue is taken up in 6 l of water and 7 kg of ice and washed with dichloromethane (once 3 l, once 2 l).
- the ice-cold water phase is adjusted to pH 2 with concentrated hydrochloric acid, the precipitated product is filtered off with suction and dried in a vacuum oven.
- the crude product is dissolved in 8 1 isopropanol (hot) under reflux, then cooled, stirred for 30 min at 0 ° C to 5 ° C, suction filtered, washed with 1.4 1 isopropanol (5 ° C) and at 40 ° C in a vacuum cabinet dried.
- logP values specified in the tables and manufacturing examples above are determined in accordance with EEC Directive 79/831 Annex V.A8 by HPLC (High Performance Liquid Chromatography) on a phase reversal column (C 18). Temperature: 43 ° C.
- the determination is carried out in the acidic range at pH 2.3 with 0.1% aqueous phosphoric acid and acetonitrile as eluents; linear gradient from 10% acetonitrile to 90% acetonitrile.
- the calibration is carried out with unbranched alkan-2-ones (with 3 to 16 carbon atoms) whose logP values are known (determination of the logP values on the basis of the retention times by linear interpolation between two successive alkanones).
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Abstract
Description
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Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
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AT04740053T ATE519729T1 (de) | 2003-07-01 | 2004-06-18 | Verfahren zum herstellen von difluoracetessigs urealkylestern |
EP04740053A EP1644314B1 (de) | 2003-07-01 | 2004-06-18 | Verfahren zum herstellen von difluoracetessigs urealkylestern |
US10/561,031 US7585998B2 (en) | 2003-07-01 | 2004-06-18 | Method for producing difluoro-acetyl-acetic acid alkylesters |
JP2006518011A JP4727576B2 (ja) | 2003-07-01 | 2004-06-18 | ジフルオロアセト酢酸のアルキルエステルを調製するための方法 |
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DE10329450 | 2003-07-01 | ||
DE10329450.3 | 2003-07-01 | ||
DE10331496.2 | 2003-07-11 | ||
DE10331496A DE10331496A1 (de) | 2003-07-01 | 2003-07-11 | Verfahren zum Herstellen von Difluoracetessigsäurealkylestern |
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US (1) | US7585998B2 (de) |
EP (1) | EP1644314B1 (de) |
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DE102007005296A1 (de) | 2007-02-02 | 2008-08-07 | Bayer Cropscience Ag | Verfahren zum Herstellen von Dihaloacetessigsäurealkylestern |
EP1997808A1 (de) * | 2007-05-31 | 2008-12-03 | Syngeta Participations AG | Verfahren zur Herstellung von Pyrazolen |
WO2008145257A1 (en) * | 2007-05-31 | 2008-12-04 | Syngenta Participations Ag | Process for the production of pyrazoles |
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WO2010009990A1 (en) | 2008-07-21 | 2010-01-28 | Basf Se | Process for preparing 1,3-disubstituted pyrazolecarboxylic esters |
US7863460B2 (en) * | 2005-02-25 | 2011-01-04 | Sagami Chemical Research Center | Process for producing 1-substituted-3-fluoroalkylpyrazole-4-carboxylate |
US8314233B2 (en) | 2008-05-02 | 2012-11-20 | Basf Se | Process for preparing 2-(aminomethylidene)-4,4-difluoro-3-oxobutyric esters |
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US8598222B2 (en) | 2008-05-05 | 2013-12-03 | Basf Se | Method for preparing 1,3,4-substituted pyrazol compounds |
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DE102007003554A1 (de) | 2007-01-24 | 2008-07-31 | Bayer Materialscience Ag | Verfahren zur Leistungsverbesserung von Nickelelektroden |
WO2009069011A1 (en) * | 2007-11-29 | 2009-06-04 | Ranbaxy Laboratories Limited | Process for the preparation of substituted 1,3-oxathiolanes |
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US8871947B2 (en) | 2013-02-04 | 2014-10-28 | KingChem LLC | Preparation of alkyl 3-difluoromethyl-1-methyl-1H-pyrazole-4-carboxylic acid ester |
US9139507B2 (en) | 2013-12-09 | 2015-09-22 | KingChem LLC. | Process for the preparation of alkyl 3-difluoromethyl-1-methyl-1H-pyrazole-4-carboxylate and its analogs |
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US8481778B2 (en) | 2007-08-16 | 2013-07-09 | Solvay (Societe Anonyme) | Process for the preparation of esters of 4-fluorosubstituted 3-oxo-alcanoic acids |
US8314233B2 (en) | 2008-05-02 | 2012-11-20 | Basf Se | Process for preparing 2-(aminomethylidene)-4,4-difluoro-3-oxobutyric esters |
US8586750B2 (en) | 2008-05-02 | 2013-11-19 | Basf Se | Method for the production of halogen-substituted 2-(aminomethylidene)-3-oxobutyric acid esters |
US8592578B2 (en) | 2008-05-02 | 2013-11-26 | Basf Se | Process for preparing 2-(aminomethylidene)-4,4-difluoro-3-oxobutyric esters |
US8598222B2 (en) | 2008-05-05 | 2013-12-03 | Basf Se | Method for preparing 1,3,4-substituted pyrazol compounds |
WO2010009990A1 (en) | 2008-07-21 | 2010-01-28 | Basf Se | Process for preparing 1,3-disubstituted pyrazolecarboxylic esters |
US8344157B2 (en) | 2008-07-21 | 2013-01-01 | Basf Se | Process for preparing 1,3-disubstituted pyrazolecarboxylic esters |
Also Published As
Publication number | Publication date |
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US7585998B2 (en) | 2009-09-08 |
US20060149091A1 (en) | 2006-07-06 |
EP1644314B1 (de) | 2011-08-10 |
EP1644314A1 (de) | 2006-04-12 |
KR20060027822A (ko) | 2006-03-28 |
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