CN106458918B - 经由酮亚胺的酰化来制备3,5-双(卤代烷基)吡唑的方法 - Google Patents
经由酮亚胺的酰化来制备3,5-双(卤代烷基)吡唑的方法 Download PDFInfo
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- CN106458918B CN106458918B CN201580031429.XA CN201580031429A CN106458918B CN 106458918 B CN106458918 B CN 106458918B CN 201580031429 A CN201580031429 A CN 201580031429A CN 106458918 B CN106458918 B CN 106458918B
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- butyl
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- 238000000034 method Methods 0.000 title claims abstract description 23
- 150000003217 pyrazoles Chemical class 0.000 title claims abstract description 10
- 230000010933 acylation Effects 0.000 title abstract description 3
- 238000005917 acylation reaction Methods 0.000 title abstract description 3
- 238000002360 preparation method Methods 0.000 claims abstract description 10
- -1 chloro- 2- fluoro ethyl Chemical group 0.000 claims description 55
- 150000001875 compounds Chemical class 0.000 claims description 20
- 125000000217 alkyl group Chemical group 0.000 claims description 17
- 239000000460 chlorine Substances 0.000 claims description 16
- 229910052731 fluorine Inorganic materials 0.000 claims description 16
- 229910052801 chlorine Inorganic materials 0.000 claims description 15
- 239000002253 acid Substances 0.000 claims description 11
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 claims description 11
- 125000002023 trifluoromethyl group Chemical group FC(F)(F)* 0.000 claims description 11
- 125000001449 isopropyl group Chemical group [H]C([H])([H])C([H])(*)C([H])([H])[H] 0.000 claims description 10
- 125000001797 benzyl group Chemical group [H]C1=C([H])C([H])=C(C([H])=C1[H])C([H])([H])* 0.000 claims description 9
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims description 9
- 125000004123 n-propyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])* 0.000 claims description 8
- 125000001028 difluoromethyl group Chemical group [H]C(F)(F)* 0.000 claims description 7
- 125000000959 isobutyl group Chemical group [H]C([H])([H])C([H])(C([H])([H])[H])C([H])([H])* 0.000 claims description 6
- 125000002914 sec-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])(*)C([H])([H])[H] 0.000 claims description 6
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 claims description 6
- 229910052794 bromium Inorganic materials 0.000 claims description 5
- 239000011737 fluorine Substances 0.000 claims description 5
- 229910052760 oxygen Inorganic materials 0.000 claims description 5
- 125000006340 pentafluoro ethyl group Chemical group FC(F)(F)C(F)(F)* 0.000 claims description 5
- 238000007363 ring formation reaction Methods 0.000 claims description 5
- 125000000740 n-pentyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 claims description 4
- 125000000453 2,2,2-trichloroethyl group Chemical group [H]C([H])(*)C(Cl)(Cl)Cl 0.000 claims description 3
- 125000004777 2-fluoroethyl group Chemical group [H]C([H])(F)C([H])([H])* 0.000 claims description 3
- ZKBNUNIVNISNDB-UHFFFAOYSA-N [Cl].FC Chemical compound [Cl].FC ZKBNUNIVNISNDB-UHFFFAOYSA-N 0.000 claims description 3
- 125000000286 phenylethyl group Chemical group [H]C1=C([H])C([H])=C(C([H])=C1[H])C([H])([H])C([H])([H])* 0.000 claims description 3
- 125000004206 2,2,2-trifluoroethyl group Chemical group [H]C([H])(*)C(F)(F)F 0.000 claims description 2
- 125000004774 dichlorofluoromethyl group Chemical group FC(Cl)(Cl)* 0.000 claims description 2
- 125000003784 fluoroethyl group Chemical group [H]C([H])(F)C([H])([H])* 0.000 claims description 2
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 32
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 30
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 27
- 239000002585 base Substances 0.000 description 27
- WEVYAHXRMPXWCK-UHFFFAOYSA-N Acetonitrile Chemical compound CC#N WEVYAHXRMPXWCK-UHFFFAOYSA-N 0.000 description 24
- HEDRZPFGACZZDS-MICDWDOJSA-N Trichloro(2H)methane Chemical compound [2H]C(Cl)(Cl)Cl HEDRZPFGACZZDS-MICDWDOJSA-N 0.000 description 16
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 14
- 150000001412 amines Chemical class 0.000 description 12
- MVPPADPHJFYWMZ-UHFFFAOYSA-N chlorobenzene Chemical compound ClC1=CC=CC=C1 MVPPADPHJFYWMZ-UHFFFAOYSA-N 0.000 description 12
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 12
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 11
- 238000006243 chemical reaction Methods 0.000 description 11
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 10
- OAKJQQAXSVQMHS-UHFFFAOYSA-N Hydrazine Chemical compound NN OAKJQQAXSVQMHS-UHFFFAOYSA-N 0.000 description 10
- 125000003118 aryl group Chemical group 0.000 description 10
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 9
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 description 9
- JUJWROOIHBZHMG-UHFFFAOYSA-N Pyridine Chemical compound C1=CC=NC=C1 JUJWROOIHBZHMG-UHFFFAOYSA-N 0.000 description 9
- RDOXTESZEPMUJZ-UHFFFAOYSA-N anisole Chemical class COC1=CC=CC=C1 RDOXTESZEPMUJZ-UHFFFAOYSA-N 0.000 description 9
- JFDZBHWFFUWGJE-UHFFFAOYSA-N benzonitrile Chemical compound N#CC1=CC=CC=C1 JFDZBHWFFUWGJE-UHFFFAOYSA-N 0.000 description 9
- 239000000203 mixture Substances 0.000 description 8
- 239000002904 solvent Substances 0.000 description 8
- BZLVMXJERCGZMT-UHFFFAOYSA-N Methyl tert-butyl ether Chemical compound COC(C)(C)C BZLVMXJERCGZMT-UHFFFAOYSA-N 0.000 description 7
- HEDRZPFGACZZDS-UHFFFAOYSA-N Chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 description 6
- XTHFKEDIFFGKHM-UHFFFAOYSA-N Dimethoxyethane Chemical compound COCCOC XTHFKEDIFFGKHM-UHFFFAOYSA-N 0.000 description 6
- IAZDPXIOMUYVGZ-UHFFFAOYSA-N Dimethylsulphoxide Chemical compound CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 description 6
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 6
- 235000019441 ethanol Nutrition 0.000 description 6
- 125000002877 alkyl aryl group Chemical group 0.000 description 5
- 125000003710 aryl alkyl group Chemical group 0.000 description 5
- RAXXELZNTBOGNW-UHFFFAOYSA-N imidazole Natural products C1=CNC=N1 RAXXELZNTBOGNW-UHFFFAOYSA-N 0.000 description 5
- UAEPNZWRGJTJPN-UHFFFAOYSA-N methylcyclohexane Chemical compound CC1CCCCC1 UAEPNZWRGJTJPN-UHFFFAOYSA-N 0.000 description 5
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 5
- UMJSCPRVCHMLSP-UHFFFAOYSA-N pyridine Natural products COC1=CC=CN=C1 UMJSCPRVCHMLSP-UHFFFAOYSA-N 0.000 description 5
- 238000005160 1H NMR spectroscopy Methods 0.000 description 4
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 description 4
- DTQVDTLACAAQTR-UHFFFAOYSA-N Trifluoroacetic acid Chemical compound OC(=O)C(F)(F)F DTQVDTLACAAQTR-UHFFFAOYSA-N 0.000 description 4
- 150000001408 amides Chemical class 0.000 description 4
- 125000000113 cyclohexyl group Chemical group [H]C1([H])C([H])([H])C([H])([H])C([H])(*)C([H])([H])C1([H])[H] 0.000 description 4
- 229910052757 nitrogen Inorganic materials 0.000 description 4
- 150000003457 sulfones Chemical class 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- UOCLXMDMGBRAIB-UHFFFAOYSA-N 1,1,1-trichloroethane Chemical class CC(Cl)(Cl)Cl UOCLXMDMGBRAIB-UHFFFAOYSA-N 0.000 description 3
- SCYULBFZEHDVBN-UHFFFAOYSA-N 1,1-Dichloroethane Chemical class CC(Cl)Cl SCYULBFZEHDVBN-UHFFFAOYSA-N 0.000 description 3
- LZDKZFUFMNSQCJ-UHFFFAOYSA-N 1,2-diethoxyethane Chemical compound CCOCCOCC LZDKZFUFMNSQCJ-UHFFFAOYSA-N 0.000 description 3
- KAESVJOAVNADME-UHFFFAOYSA-N 1H-pyrrole Natural products C=1C=CNC=1 KAESVJOAVNADME-UHFFFAOYSA-N 0.000 description 3
- 239000004215 Carbon black (E152) Substances 0.000 description 3
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 3
- ZAFNJMIOTHYJRJ-UHFFFAOYSA-N Diisopropyl ether Chemical compound CC(C)OC(C)C ZAFNJMIOTHYJRJ-UHFFFAOYSA-N 0.000 description 3
- 239000002841 Lewis acid Substances 0.000 description 3
- IMNFDUFMRHMDMM-UHFFFAOYSA-N N-Heptane Chemical compound CCCCCCC IMNFDUFMRHMDMM-UHFFFAOYSA-N 0.000 description 3
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical class CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 description 3
- 150000001338 aliphatic hydrocarbons Chemical class 0.000 description 3
- 150000004945 aromatic hydrocarbons Chemical class 0.000 description 3
- 125000004429 atom Chemical group 0.000 description 3
- 238000009835 boiling Methods 0.000 description 3
- KVNRLNFWIYMESJ-UHFFFAOYSA-N butyronitrile Chemical compound CCCC#N KVNRLNFWIYMESJ-UHFFFAOYSA-N 0.000 description 3
- 125000001559 cyclopropyl group Chemical group [H]C1([H])C([H])([H])C1([H])* 0.000 description 3
- NNBZCPXTIHJBJL-UHFFFAOYSA-N decalin Chemical compound C1CCCC2CCCCC21 NNBZCPXTIHJBJL-UHFFFAOYSA-N 0.000 description 3
- 150000004816 dichlorobenzenes Chemical class 0.000 description 3
- 150000002012 dioxanes Chemical class 0.000 description 3
- 150000008282 halocarbons Chemical class 0.000 description 3
- 125000005842 heteroatom Chemical group 0.000 description 3
- 125000004836 hexamethylene group Chemical group [H]C([H])([*:2])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[*:1] 0.000 description 3
- GNOIPBMMFNIUFM-UHFFFAOYSA-N hexamethylphosphoric triamide Chemical compound CN(C)P(=O)(N(C)C)N(C)C GNOIPBMMFNIUFM-UHFFFAOYSA-N 0.000 description 3
- 229930195733 hydrocarbon Natural products 0.000 description 3
- 150000002430 hydrocarbons Chemical class 0.000 description 3
- LRDFRRGEGBBSRN-UHFFFAOYSA-N isobutyronitrile Chemical compound CC(C)C#N LRDFRRGEGBBSRN-UHFFFAOYSA-N 0.000 description 3
- 150000007517 lewis acids Chemical class 0.000 description 3
- UZKWTJUDCOPSNM-UHFFFAOYSA-N methoxybenzene Substances CCCCOC=C UZKWTJUDCOPSNM-UHFFFAOYSA-N 0.000 description 3
- JIKUXBYRTXDNIY-UHFFFAOYSA-N n-methyl-n-phenylformamide Chemical compound O=CN(C)C1=CC=CC=C1 JIKUXBYRTXDNIY-UHFFFAOYSA-N 0.000 description 3
- 150000002825 nitriles Chemical class 0.000 description 3
- 239000003208 petroleum Substances 0.000 description 3
- 229910052698 phosphorus Inorganic materials 0.000 description 3
- FVSKHRXBFJPNKK-UHFFFAOYSA-N propionitrile Chemical compound CCC#N FVSKHRXBFJPNKK-UHFFFAOYSA-N 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 125000001424 substituent group Chemical group 0.000 description 3
- 150000003462 sulfoxides Chemical class 0.000 description 3
- HVZJRWJGKQPSFL-UHFFFAOYSA-N tert-Amyl methyl ether Chemical compound CCC(C)(C)OC HVZJRWJGKQPSFL-UHFFFAOYSA-N 0.000 description 3
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 3
- 239000008096 xylene Substances 0.000 description 3
- 150000005071 1,2,4-oxadiazoles Chemical class 0.000 description 2
- YGTAZGSLCXNBQL-UHFFFAOYSA-N 1,2,4-thiadiazole Chemical class C=1N=CSN=1 YGTAZGSLCXNBQL-UHFFFAOYSA-N 0.000 description 2
- 125000004776 1-fluoroethyl group Chemical group [H]C([H])([H])C([H])(F)* 0.000 description 2
- KOPFEFZSAMLEHK-UHFFFAOYSA-N 1h-pyrazole-5-carboxylic acid Chemical class OC(=O)C=1C=CNN=1 KOPFEFZSAMLEHK-UHFFFAOYSA-N 0.000 description 2
- BSKHPKMHTQYZBB-UHFFFAOYSA-N 2-methylpyridine Chemical compound CC1=CC=CC=N1 BSKHPKMHTQYZBB-UHFFFAOYSA-N 0.000 description 2
- YYPFZXBEOCAFDL-UHFFFAOYSA-N 3,5-bis(difluoromethyl)-1h-pyrazole Chemical class FC(F)C=1C=C(C(F)F)NN=1 YYPFZXBEOCAFDL-UHFFFAOYSA-N 0.000 description 2
- NSPMIYGKQJPBQR-UHFFFAOYSA-N 4H-1,2,4-triazole Chemical compound C=1N=CNN=1 NSPMIYGKQJPBQR-UHFFFAOYSA-N 0.000 description 2
- JNZMCMSGSKHZQW-UHFFFAOYSA-N 5-(difluoromethyl)-3-(trifluoromethyl)-1h-pyrazole Chemical class FC(F)C1=CC(C(F)(F)F)=NN1 JNZMCMSGSKHZQW-UHFFFAOYSA-N 0.000 description 2
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 2
- WKBOTKDWSSQWDR-UHFFFAOYSA-N Bromine atom Chemical compound [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 description 2
- ULGZDMOVFRHVEP-RWJQBGPGSA-N Erythromycin Chemical class O([C@@H]1[C@@H](C)C(=O)O[C@@H]([C@@]([C@H](O)[C@@H](C)C(=O)[C@H](C)C[C@@](C)(O)[C@H](O[C@H]2[C@@H]([C@H](C[C@@H](C)O2)N(C)C)O)[C@H]1C)(C)O)CC)[C@H]1C[C@@](C)(OC)[C@@H](O)[C@H](C)O1 ULGZDMOVFRHVEP-RWJQBGPGSA-N 0.000 description 2
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 2
- AFVFQIVMOAPDHO-UHFFFAOYSA-N Methanesulfonic acid Chemical compound CS(O)(=O)=O AFVFQIVMOAPDHO-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
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 description 2
- UFWIBTONFRDIAS-UHFFFAOYSA-N Naphthalene Chemical compound C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 description 2
- 150000001252 acrylic acid derivatives Chemical class 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- 125000001118 alkylidene group Chemical group 0.000 description 2
- WGQKYBSKWIADBV-UHFFFAOYSA-N benzylamine Chemical compound NCC1=CC=CC=C1 WGQKYBSKWIADBV-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- GDTBXPJZTBHREO-UHFFFAOYSA-N bromine Substances BrBr GDTBXPJZTBHREO-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 125000004432 carbon atom Chemical group C* 0.000 description 2
- 125000006001 difluoroethyl group Chemical group 0.000 description 2
- FDPIMTJIUBPUKL-UHFFFAOYSA-N dimethylacetone Natural products CCC(=O)CC FDPIMTJIUBPUKL-UHFFFAOYSA-N 0.000 description 2
- 150000004820 halides Chemical class 0.000 description 2
- 229910052736 halogen Inorganic materials 0.000 description 2
- 125000005843 halogen group Chemical group 0.000 description 2
- 150000002367 halogens Chemical class 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- BDERNNFJNOPAEC-UHFFFAOYSA-N propan-1-ol Chemical compound CCCO BDERNNFJNOPAEC-UHFFFAOYSA-N 0.000 description 2
- 125000004076 pyridyl group Chemical group 0.000 description 2
- 230000035484 reaction time Effects 0.000 description 2
- 238000000926 separation method Methods 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
- 238000003786 synthesis reaction Methods 0.000 description 2
- GIZSHQYTTBQKOQ-UHFFFAOYSA-N threo-Syringoylglycerol Chemical class COC1=CC(C(O)C(O)CO)=CC(OC)=C1O GIZSHQYTTBQKOQ-UHFFFAOYSA-N 0.000 description 2
- 125000003944 tolyl group Chemical group 0.000 description 2
- COLOHWPRNRVWPI-UHFFFAOYSA-N 1,1,1-trifluoroethane Chemical compound [CH2]C(F)(F)F COLOHWPRNRVWPI-UHFFFAOYSA-N 0.000 description 1
- 150000000177 1,2,3-triazoles Chemical class 0.000 description 1
- FYADHXFMURLYQI-UHFFFAOYSA-N 1,2,4-triazine Chemical compound C1=CN=NC=N1 FYADHXFMURLYQI-UHFFFAOYSA-N 0.000 description 1
- 125000003626 1,2,4-triazol-1-yl group Chemical group [*]N1N=C([H])N=C1[H] 0.000 description 1
- 150000005072 1,3,4-oxadiazoles Chemical class 0.000 description 1
- JIHQDMXYYFUGFV-UHFFFAOYSA-N 1,3,5-triazine Chemical compound C1=NC=NC=N1 JIHQDMXYYFUGFV-UHFFFAOYSA-N 0.000 description 1
- 125000006083 1-bromoethyl group Chemical group 0.000 description 1
- 125000001478 1-chloroethyl group Chemical group [H]C([H])([H])C([H])(Cl)* 0.000 description 1
- DTJIBVSGNIAPCX-UHFFFAOYSA-N 2,2,2-trifluoroacetyl bromide Chemical compound FC(F)(F)C(Br)=O DTJIBVSGNIAPCX-UHFFFAOYSA-N 0.000 description 1
- DCEPGADSNJKOJK-UHFFFAOYSA-N 2,2,2-trifluoroacetyl fluoride Chemical compound FC(=O)C(F)(F)F DCEPGADSNJKOJK-UHFFFAOYSA-N 0.000 description 1
- KURKJXZWCPWPFX-UHFFFAOYSA-N 2,2-difluoroacetyl chloride Chemical compound FC(F)C(Cl)=O KURKJXZWCPWPFX-UHFFFAOYSA-N 0.000 description 1
- JVSFQJZRHXAUGT-UHFFFAOYSA-N 2,2-dimethylpropanoyl chloride Chemical compound CC(C)(C)C(Cl)=O JVSFQJZRHXAUGT-UHFFFAOYSA-N 0.000 description 1
- 125000002941 2-furyl group Chemical group O1C([*])=C([H])C([H])=C1[H] 0.000 description 1
- ZRNSSRODJSSVEJ-UHFFFAOYSA-N 2-methylpentacosane Chemical compound CCCCCCCCCCCCCCCCCCCCCCCC(C)C ZRNSSRODJSSVEJ-UHFFFAOYSA-N 0.000 description 1
- 125000000175 2-thienyl group Chemical group S1C([*])=C([H])C([H])=C1[H] 0.000 description 1
- 125000003682 3-furyl group Chemical group O1C([H])=C([*])C([H])=C1[H] 0.000 description 1
- 125000001541 3-thienyl group Chemical group S1C([H])=C([*])C([H])=C1[H] 0.000 description 1
- KDDQRKBRJSGMQE-UHFFFAOYSA-N 4-thiazolyl Chemical group [C]1=CSC=N1 KDDQRKBRJSGMQE-UHFFFAOYSA-N 0.000 description 1
- XKVUYEYANWFIJX-UHFFFAOYSA-N 5-methyl-1h-pyrazole Chemical class CC1=CC=NN1 XKVUYEYANWFIJX-UHFFFAOYSA-N 0.000 description 1
- CWDWFSXUQODZGW-UHFFFAOYSA-N 5-thiazolyl Chemical group [C]1=CN=CS1 CWDWFSXUQODZGW-UHFFFAOYSA-N 0.000 description 1
- YTPLMLYBLZKORZ-UHFFFAOYSA-N Divinylene sulfide Natural products C=1C=CSC=1 YTPLMLYBLZKORZ-UHFFFAOYSA-N 0.000 description 1
- SNRUBQQJIBEYMU-UHFFFAOYSA-N Dodecane Natural products CCCCCCCCCCCC SNRUBQQJIBEYMU-UHFFFAOYSA-N 0.000 description 1
- JNCMHMUGTWEVOZ-UHFFFAOYSA-N F[CH]F Chemical compound F[CH]F JNCMHMUGTWEVOZ-UHFFFAOYSA-N 0.000 description 1
- PCNDJXKNXGMECE-UHFFFAOYSA-N Phenazine Natural products C1=CC=CC2=NC3=CC=CC=C3N=C21 PCNDJXKNXGMECE-UHFFFAOYSA-N 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 1
- KYQCOXFCLRTKLS-UHFFFAOYSA-N Pyrazine Natural products C1=CN=CC=N1 KYQCOXFCLRTKLS-UHFFFAOYSA-N 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 1
- 229910003074 TiCl4 Inorganic materials 0.000 description 1
- 125000002252 acyl group Chemical group 0.000 description 1
- 150000001299 aldehydes Chemical class 0.000 description 1
- 125000005428 anthryl group Chemical group [H]C1=C([H])C([H])=C2C([H])=C3C(*)=C([H])C([H])=C([H])C3=C([H])C2=C1[H] 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 150000003851 azoles Chemical class 0.000 description 1
- 125000005997 bromomethyl group Chemical group 0.000 description 1
- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 125000002837 carbocyclic group Chemical group 0.000 description 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- 238000001311 chemical methods and process Methods 0.000 description 1
- 125000004218 chloromethyl group Chemical group [H]C([H])(Cl)* 0.000 description 1
- 150000001924 cycloalkanes Chemical class 0.000 description 1
- 125000001316 cycloalkyl alkyl group Chemical group 0.000 description 1
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- 125000005270 trialkylamine group Chemical group 0.000 description 1
- 125000003866 trichloromethyl group Chemical group ClC(Cl)(Cl)* 0.000 description 1
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- 238000005406 washing Methods 0.000 description 1
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- 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
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- 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
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Abstract
本发明涉及一种经由酮亚胺的酰化来制备式(Ia)和(Ib)的3,5‑双(卤代烷基)吡唑衍生物的新方法,
Description
本发明涉及一种制备3,5-双(卤代烷基)吡唑衍生物的新方法。
多氟烷基吡唑羧酸衍生物和3,5-双(卤代烷基)吡唑是活性杀真菌成分的有价值的前体(WO 2003/070705、WO 2008/013925、WO 2012/025557)。
吡唑羧酸衍生物通常通过使具有两个离去基团的丙烯酸衍生物与肼反应而制备(WO 2009/112157和WO 2009/106230)。WO 2005/042468公开了一种通过下述过程制备2-二卤代酰基-3-氨基丙烯酸酯的方法:使酸性卤化物(acid halide)与二烷基氨基丙烯酸酯反应,随后使其与烷基肼进行环化反应。WO 2008/022777记载了一种通过下述过程制备3-二卤代甲基吡唑-4-羧酸衍生物的方法:在路易斯酸(Lewis acid)的存在下使α,α-二氟胺与丙烯酸衍生物反应,随后使其与烷基肼反应。
3,5-双(氟烷基)吡唑通过使双全氟烷基二酮(例如,1,1,1,5,5,5-六氟乙酰丙酮)与肼反应而制备(参见Pashkevich et al.,Zhurnal Vsesoyuznogo KhimicheskogoObshchestva im.D.I.Mendeleeva(1981),26(1),105-7),收率仅为27-40%。多氟烷基二酮的合成、分离和纯化是非常复杂的,因为该化合物通常极易挥发并且具有高毒性。
鉴于上述现有技术,本发明的目的是提供一种不具有上述缺点的方法,并因此提供一种具有高收率的3,5-双(卤代烷基)吡唑衍生物的路径。
上述目的通过一种制备式(Ia)和(Ib)的3,5-双(卤代烷基)吡唑的方法而实现,
其中,
R1和R3各自独立地选自C1-C6卤代烷基;
R2选自H、卤素、COOH、(C=O)OR5、CN和(C=O)NR6R7;
R4选自H、C1-8烷基、芳基、吡啶基;
R5选自C1-12烷基、C3-8环烷基、C6-18芳基、C7-19芳基烷基和C7-19烷基芳基;
R6和R7各自独立地选自C1-12烷基、C3-8环烷基、C6-18芳基、C7-19芳基烷基和C7-19烷基芳基,或者其中
R6和R7与和它们连接的氮原子一起可形成四元环、五元环或六元环,
其特征在于,在步骤(A)中,式(II)的酸衍生物与式(III)的化合物反应,形成式(IV)的化合物
其中,
R1如上所定义;
X为F、Cl、Br或-OC(O)R1,
其中,
R8选自C1-12烷基、C3-8环烷基、C6-18芳基、C7-19芳基烷基和C7-19烷基芳基、OR9;
R9选自C1-12烷基、C3-8环烷基、C6-18芳基、C7-19芳基烷基、C7-19烷基芳基;
R2和R3如上所定义,
其中,
R1、R2、R3、R5、R6、R7、R8、R9如上所定义,
以及,在步骤(B)中,在(V)NH2NHR4(其中R4如上所定义)的存在下,进行式(IV)的环化反应,形成(Ia)和(Ib)。
优选本发明的方法,其中,式(Ia)、(Ib)、(II)、(III)、(IV)和(V)中的基团如下所定义:
R1和R3各自独立地选自二氟甲基、三氟甲基、氯氟甲基、二氯氟甲基、氯二氟甲基、1-氟乙基、2-氟乙基、2,2-二氟乙基、2,2,2-三氟乙基、2-氯-2-氟乙基、2-二氟乙基、2,2-二氯-2-氟乙基、2,2,2-三氯乙基、四氟乙基(CF3CFH)、五氟乙基和1,1,1-三氟丙-2-基;
R2选自H、F、Cl、Br、COOCH3、COOC2H5、COOC3H7、CN和CON(CH3)2、CON(C2H5)2;
R4选自H、C1-C8烷基、芳基、吡啶基;
R8各自独立地选自甲基、乙基、正丙基、异丙基、正丁基、异丁基、仲丁基和叔丁基、环丙基、环丁基、环戊基、环己基、苯基、苄基、苯基乙基、甲苯基、2,3-二甲基苯基、2,4-二甲基苯基、2,5-二甲基苯基、2,6-二甲基苯基、3,4-二甲基苯基或3,5-二甲基苯基;
X选自F、Cl或-O(CO)R1。
更优选本发明的方法,其中,式(Ia)、(Ib)、(II)、(III)、(IV)和(V)中的基团如下所定义:
R1和R3各自独立地选自三氟甲基、二氟甲基、二氟氯甲基、五氟乙基;
R2选自H、Cl、CN、COO(C2H5)2;
R4选自H、甲基、乙基、正丙基、异丙基、正丁基、异丁基、仲丁基和叔丁基、正戊基、正己基、1,3-二甲基丁基、3,3-二甲基丁基、芳基;
R8选自甲基、乙基、正丙基、异丙基、正丁基、异丁基、仲丁基和叔丁基、环丙基、环丁基、环戊基、环己基、苄基;
X选自F、Cl或-O(CO)R1。
甚至更优选本发明的方法,其中,式(Ia)、(Ib)、(II)、(III)、(IV)和(V)中的基团如下所定义:
R1和R3各自独立地选自CF2H、CF3;
R2选自H或COOC2H5;
R4选自H、甲基、乙基、苯基;
R8选自乙基、正丙基、异丙基、正戊基、环戊基、环己基、苄基;
X选自Cl或F。
最优选本发明的方法,其中,式(Ia)、(Ib)、(II)、(III)、(IV)和(V)中的基团如下所定义:
R1和R3各自独立地选自CF2H、CF3;
R2选自H;
R4选自H、甲基、苯基;
R8选自异丙基、苄基;
X选自Cl或F。
令人惊讶地,式(I)的吡唑可在发明条件下制备,并且具有高收率和高纯度,这意味着本发明的方法克服了之前在背景技术中描述的制备方法的上述缺点。
一般定义
在本发明的上下文中,除非另有不同定义,术语“卤素”(Hal)包括选自氟、氯、溴和碘的元素,优选氟、氯和溴,更优选氟和氯。
任选取代的基团可为单取代的或多取代的,其中在多取代的情况下,多个取代基可相同或不同。
卤代烷基:具有1至6个且优选1至3个碳原子的直链或支链烷基(如上所述),其中这些基团中的一些或所有氢原子可被如上所述的卤素原子取代,例如(但不限于)C1-C3卤代烷基如氯甲基、溴甲基、二氯甲基、三氯甲基、氟甲基、二氟甲基、三氟甲基、氯氟甲基、二氯氟甲基、氯二氟甲基、1-氯乙基、1-溴乙基、1-氟乙基、2-氟乙基、2,2-二氟乙基、2,2,2-三氟乙基、2-氯-2-氟乙基、2-氯-2-二氟乙基、2,2-二氯-2-氟乙基、2,2,2-三氯乙基、五氟乙基和1,1,1-三氟丙-2-基。该定义还适用于作为复合取代基(例如卤代烷基氨基烷基等)一部分的卤代烷基,除非另有定义。优选被一个或多个卤素原子取代的烷基,例如三氟甲基(CF3)、二氟甲基(CHF2)、CF3CH2、CF2Cl或CF3CCl2。
烷基:在本发明的上下文中,除非另有不同定义,烷基是直链或支链的饱和烃基。定义C1-C12烷基包括在本文中对于烷基所限定的最宽范围。具体地,该定义包括,例如,下述含义:甲基、乙基、正丙基、异丙基、正丁基、异丁基、仲丁基和叔丁基、正戊基、正己基、1,3-二甲基丁基、3,3-二甲基丁基、正庚基、正壬基、正癸基、正十一烷基或正十二烷基。
环烷基:具有3至8且优选3至6元碳环的单环、饱和的烃基,例如(但不限于)环丙基、环戊基和环己基。该定义还适用于作为复合取代基(例如环烷基烷基等)一部分的环烷基,除非另有定义。
芳基:在本发明的上下文中,除非另有不同定义,芳基为可具有一个、两个或更多个选自O、N、P和S的杂原子的芳族烃基。定义C6-18芳基包括在本文中对于具有5至18个骨架原子的芳基所限定的最宽范围,其中碳原子可以交换为杂原子。具体地,该定义包括,例如,下述含义:苯基、环庚三烯基、环辛四烯基、萘基和蒽基;2-呋喃基、3-呋喃基、2-噻吩基、3-噻吩基、2-吡咯基、3-吡咯基、3-异噁唑基、4-异噁唑基、5-异噁唑基、3-异噻唑基、4-异噻唑基、5-异噻唑基、3-吡唑基、4-吡唑基、5-吡唑基、2-噁唑基、4-噁唑基、5-噁唑基、2-噻唑基、4-噻唑基、5-噻唑基、2-咪唑基、4-咪唑基、1,2,4-噁二唑-3-基、1,2,4-噁二唑-5-基、1,2,4-噻二唑-3-基、1,2,4-噻二唑-5-基、1,2,4-三唑-3-基、1,3,4-噁二唑-2-基、1,3,4-噻二唑-2-基和1,3,4-三唑-2-基;1-吡咯基、1-吡唑基、1,2,4-三唑-1-基、1-咪唑基、1,2,3-三唑-1-基、1,3,4-三唑-1-基;3-哒嗪基、4-哒嗪基、2-嘧啶基、4-嘧啶基、5-嘧啶基、2-吡嗪基、1,3,5-三嗪-2-基和1,2,4-三嗪-3-基。
芳基烷基(芳烷基):在本发明的上下文中,除非另有不同定义,芳基烷基(芳烷基)为芳基取代的烷基,其可具有一个C1-8-亚烷基链且在芳基骨架上,可具有一个或多个选自O、N、P和S的杂原子。定义C7-19芳烷基包括在本文中对于在骨架和亚烷基链上具有总共7至19个原子的芳基烷基所定义的最宽范围。具体地,该定义包括,例如,下述含义:苄基和苯基乙基。
烷基芳基(烷芳基):在本发明的上下文中,除非另有不同定义,烷基芳基(烷芳基)为烷基取代的芳基,其可具有一个C1-8亚烷基链且在芳基骨架上,可具有一个或多个选自O、N、P和S的杂原子。定义C7-19烷基芳基包括在本文中对于在骨架和亚烷基链上具有总共7至19个原子的烷基芳基所定义的最宽范围。具体地,该定义包括,例如,下述含义:甲苯基或2,3-二甲基苯基、2,4-二甲基苯基、2,5-二甲基苯基、2,6-二甲基苯基、3,4-二甲基苯基或3,5-二甲基苯基。
在本发明的上下文中使用的术语“中间体”描述了这样的物质,其在本发明的过程中产生并为进一步的化学加工而制备且在其中消耗或使用以便转化为另一物质。中间体通常可分离出来并在中间储存起来,或用于随后的反应步骤中而不用在先分离。术语“中间体”通常还包括在多阶段反应(分阶段反应)中瞬时产生的并且分配有反应的能量曲线中的局部最小值的不稳定的和寿命短暂的中间体。
本发明化合物可以可能的任何不同异构体形式的混合物存在,尤其是立体异构体(例如E和Z异构体、苏型和赤型异构体)和光学异构体,但如果有的话,还有互变异构体。公开并要求保护E和Z异构体,同样,也公开并要求保护苏型和赤型异构体、和光学异构体、任意这些异构体的混合物以及可能的互变异构体。
方法描述
该方法示于方案1中:
方案1:
步骤A:
步骤B:
步骤A:
在步骤A中,在碱的存在下,式(II)的酸衍生物与式(III)的化合物反应。
优选的通式(II)的化合物为三氟乙酰氯、三氟乙酰氟、二氟乙酰氟、二氟乙酰氯、三氟乙酰溴。例如使用三氟乙酸、新戊酰氯化物和吡啶还可原位产生式(II)的化合物(参见WO 2003/051820)。
本发明的式(IV)的化合物的合成在温度为0℃至+120℃、优选在+20℃至+100℃、更优选在+20℃至+60℃下且在标准压力的条件下进行。典型的碱为:三烷基胺、吡啶、烷基吡啶、甲基吡啶(picoline)、DBU。优选吡啶作为碱。
反应时间不是关键的,且根据批量大小和温度可选择在几分钟至几个小时范围内。
对于步骤A,使1至2mol、优选1至1.5mol、更优选1至1.2mol的式(II)的酸衍生物与1mol式(III)的化合物反应。
合适的溶剂为,例如,脂族烃、脂环族烃或芳族烃,如石油醚、正己烷、正庚烷、环己烷、甲基环己烷、苯、甲苯、二甲苯或萘烷;卤代烃,如氯苯、二氯苯、二氯甲烷、氯仿、四氯甲烷、二氯乙烷或三氯乙烷;醚,如二乙醚、二异丙醚、甲基叔丁基醚、甲基叔戊基醚、二噁烷、四氢呋喃、1,2-二甲氧基乙烷、1,2-二乙氧基乙烷或苯甲醚;腈,例如乙腈、丙腈、正丁腈或异丁腈或者苄腈;酰胺,如N,N-二甲基甲酰胺、N,N-二甲基乙酰胺、N-甲基甲酰苯胺、N-甲基吡咯烷酮或六甲基磷酰胺;亚砜,如二甲基亚砜;或砜,如环丁砜。特别优选的是,例如,THF、乙腈、醚、甲苯、二甲苯、氯苯、正己烷、环己烷或甲基环己烷,非常特别优选的是,例如,二氯甲烷、醚或二氯甲烷。式(IV)的化合物可用在环化步骤中,而无需先进行后处理。或者,其可通过合适的后处理步骤分离,进行表征并任选地进步纯化。
式(III)的化合物可由醛或酮和伯胺制备。所述制备在温度为10至110℃下进行,通常不使用任何溶剂或在有机溶剂如甲苯、二氯甲烷或醚中进行。路易斯酸如BF3、TiCl4还可用于促进形成酮亚胺(还参见et al.,J.Fluorine.Chem.v.125,n.6,1039-1049和Tetrahedron,69(2013),3878-3884)。
步骤B:
步骤B是在式(V)的化合物的存在下,式(IV)的化合物的环化反应。
在步骤B中,对于1mol的式(IV)的化合物,使用1至2mol、优选1至1.5mol的式(V)的肼。
在步骤B中,环化反应在温度为-40℃至+80℃、优选在+20℃至+70℃、更优选在+60℃下且在标准压力的条件下进行。
反应时间不是关键的,且根据批量大小,可以在一个很宽的范围内选择。
通常,进行环化步骤B,而不改变溶剂。
合适的溶剂为,例如,脂族烃、脂环族烃或芳族烃,如石油醚、正己烷、正庚烷、环己烷、甲基环己烷、苯、甲苯、二甲苯或萘烷;卤代烃,如氯苯、二氯苯、二氯甲烷、氯仿、四氯甲烷、二氯乙烷或三氯乙烷;醚,如二乙醚、二异丙醚、甲基叔丁基醚、甲基叔戊基醚、二噁烷、四氢呋喃、1,2-二甲氧基乙烷、1,2-二乙氧基乙烷或苯甲醚;腈,例如乙腈、丙腈、正丁腈或异丁腈或者苄腈;酰胺,如N,N-二甲基甲酰胺、N,N-二甲基乙酰胺、N-甲基甲酰苯胺、N-甲基吡咯烷酮或六甲基磷酰胺;亚砜,如二甲基亚砜;或砜,如环丁砜;链烷醇,如甲醇、乙醇、异丙醇或丁醇。特别优选的是,例如,THF、乙腈、醚、甲苯、二甲苯、氯苯、正己烷、环己烷或甲基环己烷、乙醇,非常特别优选的是,例如,乙腈、THF、醚、二氯甲烷、乙醇。
通常,式(IV)和(V)的化合物的环化反应在酸性条件下进行。
优选无机酸,例如H2SO4、HCl、HF、HBr、HI、H3PO4;或有机酸,例如CH3COOH、CF3COOH、对甲苯磺酸、甲磺酸、三氟甲磺酸。对于1mol的式(IV)的化合物,使用0.1mol至2mol、优选0.1mol至1.5mol的酸。
合适的溶剂为,例如,脂族烃、脂环族烃或芳族烃,如石油醚、正己烷、正庚烷、环己烷、甲基环己烷、苯、甲苯、二甲苯或萘烷;卤代烃,如氯苯、二氯苯、二氯甲烷、氯仿、四氯甲烷、二氯乙烷或三氯乙烷;醚,如二乙醚、二异丙醚、甲基叔丁基醚、甲基叔戊基醚、二噁烷、四氢呋喃、1,2-二甲氧基乙烷、1,2-二乙氧基乙烷或苯甲醚;醇,如甲醇、乙醇、异丙醇或丁醇;腈,如乙腈、丙腈、正丁腈或异丁腈或者苄腈;酰胺,如N,N-二甲基甲酰胺、N,N-二甲基乙酰胺、N-甲基甲酰苯胺、N-甲基吡咯烷酮或六甲基磷酰胺;亚砜,如二甲基亚砜;或砜,如环丁砜。特别优选的是,例如,乙腈、甲苯、二甲苯、氯苯、正己烷、环己烷或甲基环己烷,非常特别优选的是,例如,乙腈、THF、甲苯或二甲苯。反应完成后,例如,除去溶剂并通过过滤分离出产物,或者产物首先用水洗涤并萃取,移出有机相并在减压条件下除去溶剂。
然后,式(Ia)和式(Ib)(其中R2为(CO)OR5)的化合物可转化为式(I)(其中R2为COOH)的吡唑酸。
对于化合物(III)的制备,可重复使用胺(IV)。或者,其通过使用酸来洗涤反应混合物而被收集。
本发明通过下列实施例来阐述。
实施例1
N-(1,1-二氟丙-2-亚基)丙-2-胺(III-1)
在10℃下,向二氟乙酮(94g,1mol)于500ml甲基叔丁醚中的混合物中,加入(88g,1.5mol)异丙胺。1h后,加入(70g,0.5mol)BF3*Et2O,并将该混合物额外搅拌1h。有机溶液从底部浆液中分离,并在大气压力下蒸馏出溶剂。剩余液体在真空中蒸馏出,得到139g沸点为70-72℃/400mbar的酮亚胺。
1H NMR(400MHz,CDCl3):5.9(t,1H),3.7(m,1H),1.8(s,3H),1.1(d,6H)ppm。
19F(376MHz,CDCl3):-122(d,2F)ppm。
实施例2
N-1,1-二氟丙-2-亚基-1-苯基甲胺(III-2)
在10℃下,向二氟乙酮(94g,1mol)于500m甲苯中的混合物中,缓慢加入(107g,1mol)苄胺。6h后,在20℃下,在减压条件下蒸出甲苯并使用剩余液体而无需纯化(170g)。
1H NMR(400MHz,CDCl3):7.2-7.4(m,5H),5.9(t,1H),4.5(s,2H),2.0(s,3H)ppm。
19F(376MHz,CDCl3):-1118(d,2F)ppm。
实施例3
N-(1,1,1-三氟丙-2-亚基)丙-2-胺(III-3)
制备参见实施例2,沸点为80至82℃。
实施例4
N-1,1,1-三氟丙-2-亚基-1-苯基甲胺(III-4)
制备参见实施例2,沸点为90至91℃,1.5mbar。
实施例5
3,5-双(二氟甲基)吡唑(I-1)
将10.4g(75mmol)的N-(1,1-二氟丙-2-亚基)丙-2-胺和12g吡啶于100ml二氯甲烷中的溶液冷却至0℃。在该温度下在剧烈搅拌的条件下,分批加入19.5g二氟乙酸酸酐,并将该混合物最终在10℃下搅拌6h。向反应溶液中缓慢加入50ml HCl(作为5%水溶液)和20g水合肼(hydrazinhydrate)以保持温度为40℃,并将混合物在40℃下搅拌5h。加入100ml水和100ml二氯甲烷,分离有机层,用水洗涤,经MgSO4干燥并在真空中浓缩以得到油性产物。在92-95℃/1mbar下真空蒸馏,得到8.8g(70%)纯3,5-双(二氟甲基)-1H-吡唑b),呈白色固体并且熔点为70-71℃。
1H NMR(400MHz,CDCl3)12.5(br,1H),6.77(t,2H,J=54.8Hz),6.74(s,1H)ppm。
实施例6
3-(二氟甲基)-5-(三氟甲基)-1H-吡唑(I-2)
类似由N-(1,1-二氟丙-2-亚基)丙-2-胺和三氟乙酸酸酐获得。
收率78%。
1H NMR(400MHz,CDCl3)12.6(br,1H),6.81(s,1H),6.76(t,1H,J=54.5Hz);13C(101MHz,CDCl3)140.7,128.8,120.3(q,JC-F=266Hz),108.5(t,JC-F=237Hz),103.8;19F(376MHz,CDCl3)-61.7(s,3F),-112.9(d,2F,J=54.7Hz);对于C5H4F5N2[M+H]+计算的HRMS(ESI)为187.029,实测值为187.029。
Claims (5)
1.一种制备式(Ia)和(Ib)的3,5-双(卤代烷基)吡唑的方法,
其中
R1和R3各自独立地选自C1-C6卤代烷基;
R2选自H;
R4选自H;
其特征在于,在步骤(A)中,在碱的存在下,式(II)的酸衍生物与式(III)的化合物反应,形成式(IV)的化合物
其中
R1如上所定义;
X为F、Cl、Br或-OC(O)R1,
其中
R8选自C1-12烷基和C7-19芳基烷基;
R2和R3如上所定义,
其中
R1、R2、R3、R8如上所定义,
以及,在步骤(B)中,在酸性条件下,在(V)NH2NHR4——其中R4如上所定义——的存在下,进行式(IV)的环化反应,形成(Ia)和(Ib)。
2.权利要求1的方法,其特征在于
R1和R3各自独立地选自二氟甲基、三氟甲基、氯氟甲基、二氯氟甲基、氯二氟甲基、1-氟乙基、2-氟乙基、2,2-二氟乙基、2,2,2-三氟乙基、2-氯-2-氟乙基、2-二氟乙基、2,2-二氯-2-氟乙基、2,2,2-三氯乙基、四氟乙基CF3CFH、五氟乙基和1,1,1-三氟丙-2-基;
R2选自H;
R4选自H;
R8各自独立地选自甲基、乙基、正丙基、异丙基、正丁基、异丁基、仲丁基和叔丁基、苄基或苯基乙基;
X选自F、Cl或-O(CO)R1。
3.权利要求1的方法,其特征在于
R1和R3各自独立地选自三氟甲基、二氟甲基、二氟氯甲基、五氟乙基;
R2选自H;
R4选自H;
R8选自甲基、乙基、正丙基、异丙基、正丁基、异丁基、仲丁基和叔丁基、苄基;
X选自F、Cl或-O(CO)R1。
4.权利要求1的方法,其特征在于
R1和R3各自独立地选自CF2H、CF3;
R2选自H;
R4选自H;
R8选自乙基、正丙基、异丙基、正戊基、苄基;
X选自Cl或F。
5.权利要求1的方法,其特征在于
R1和R3各自独立地选自CF2H、CF3;
R2选自H;
R4选自H;
R8选自异丙基、苄基;
X选自Cl或F。
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BR112016028700A2 (pt) | 2017-08-22 |
WO2015189138A1 (en) | 2015-12-17 |
IL249282A0 (en) | 2017-02-28 |
KR20170018885A (ko) | 2017-02-20 |
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