CN1616412A - 卤代的4-氨基苯酚的制备 - Google Patents
卤代的4-氨基苯酚的制备 Download PDFInfo
- Publication number
- CN1616412A CN1616412A CNA2004100771833A CN200410077183A CN1616412A CN 1616412 A CN1616412 A CN 1616412A CN A2004100771833 A CNA2004100771833 A CN A2004100771833A CN 200410077183 A CN200410077183 A CN 200410077183A CN 1616412 A CN1616412 A CN 1616412A
- Authority
- CN
- China
- Prior art keywords
- amino
- formula
- phenol
- compound
- fluorophenol
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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- 238000002360 preparation method Methods 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 title claims abstract description 15
- PLIKAWJENQZMHA-UHFFFAOYSA-N 4-aminophenol Chemical class NC1=CC=C(O)C=C1 PLIKAWJENQZMHA-UHFFFAOYSA-N 0.000 title abstract description 5
- 229910052736 halogen Inorganic materials 0.000 title description 2
- 150000002367 halogens Chemical class 0.000 title 1
- 239000003814 drug Substances 0.000 claims abstract description 6
- 239000003905 agrochemical Substances 0.000 claims abstract description 5
- 239000000543 intermediate Substances 0.000 claims abstract description 4
- 150000001875 compounds Chemical class 0.000 claims description 67
- -1 alkali metal salts Chemical class 0.000 claims description 46
- 239000001257 hydrogen Substances 0.000 claims description 26
- 229910052739 hydrogen Inorganic materials 0.000 claims description 26
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 19
- 238000006243 chemical reaction Methods 0.000 claims description 16
- 229910052783 alkali metal Inorganic materials 0.000 claims description 8
- 239000002585 base Substances 0.000 claims description 8
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 claims description 7
- 239000002253 acid Substances 0.000 claims description 7
- 239000004480 active ingredient Substances 0.000 claims description 7
- 229910052731 fluorine Inorganic materials 0.000 claims description 7
- 239000011737 fluorine Substances 0.000 claims description 7
- WKBOTKDWSSQWDR-UHFFFAOYSA-N Bromine atom Chemical compound [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 claims description 6
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims description 6
- GDTBXPJZTBHREO-UHFFFAOYSA-N bromine Substances BrBr GDTBXPJZTBHREO-UHFFFAOYSA-N 0.000 claims description 6
- 229910052794 bromium Inorganic materials 0.000 claims description 6
- 239000000460 chlorine Substances 0.000 claims description 6
- 229910052801 chlorine Inorganic materials 0.000 claims description 6
- RPNPSBJBVUOFBH-UHFFFAOYSA-N 4-amino-2,5-difluorophenol Chemical compound NC1=CC(F)=C(O)C=C1F RPNPSBJBVUOFBH-UHFFFAOYSA-N 0.000 claims description 5
- MXJQJURZHQZLNN-UHFFFAOYSA-N 4-amino-2-fluorophenol Chemical compound NC1=CC=C(O)C(F)=C1 MXJQJURZHQZLNN-UHFFFAOYSA-N 0.000 claims description 5
- YHQVBHFKCBFNEG-UHFFFAOYSA-N 4-amino-3,5-difluorophenol Chemical compound NC1=C(F)C=C(O)C=C1F YHQVBHFKCBFNEG-UHFFFAOYSA-N 0.000 claims description 5
- 125000003710 aryl alkyl group Chemical group 0.000 claims description 5
- 239000012954 diazonium Substances 0.000 claims description 5
- 150000001989 diazonium salts Chemical class 0.000 claims description 5
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 claims description 5
- 125000004400 (C1-C12) alkyl group Chemical group 0.000 claims description 4
- LYFMJLYBTMEYDV-UHFFFAOYSA-N 4-amino-2,3-difluorophenol Chemical compound NC1=CC=C(O)C(F)=C1F LYFMJLYBTMEYDV-UHFFFAOYSA-N 0.000 claims description 4
- RFEOSYDHBGPXCU-UHFFFAOYSA-N 4-amino-2,6-difluorophenol Chemical compound NC1=CC(F)=C(O)C(F)=C1 RFEOSYDHBGPXCU-UHFFFAOYSA-N 0.000 claims description 4
- ZIISAPMQJPNUOE-UHFFFAOYSA-N 4-amino-2-(trifluoromethoxy)phenol Chemical compound NC1=CC=C(O)C(OC(F)(F)F)=C1 ZIISAPMQJPNUOE-UHFFFAOYSA-N 0.000 claims description 4
- 125000000217 alkyl group Chemical group 0.000 claims description 4
- 125000003118 aryl group Chemical group 0.000 claims description 4
- 125000002023 trifluoromethyl group Chemical group FC(F)(F)* 0.000 claims description 4
- AQLKYQSRRVETTR-UHFFFAOYSA-N 4-amino-3-(trifluoromethoxy)phenol Chemical compound NC1=CC=C(O)C=C1OC(F)(F)F AQLKYQSRRVETTR-UHFFFAOYSA-N 0.000 claims description 3
- DOPYFZKJWNMJKQ-UHFFFAOYSA-N 4-amino-3-bromo-5-fluorophenol Chemical compound NC1=C(F)C=C(O)C=C1Br DOPYFZKJWNMJKQ-UHFFFAOYSA-N 0.000 claims description 3
- NNSXHCJONSYHGX-UHFFFAOYSA-N 4-amino-3-chloro-2-fluorophenol Chemical compound NC1=CC=C(O)C(F)=C1Cl NNSXHCJONSYHGX-UHFFFAOYSA-N 0.000 claims description 3
- DAYXIMVBDQIHOJ-UHFFFAOYSA-N 4-amino-3-chloro-5-fluorophenol Chemical compound NC1=C(F)C=C(O)C=C1Cl DAYXIMVBDQIHOJ-UHFFFAOYSA-N 0.000 claims description 3
- GAICBADMNLLFDV-UHFFFAOYSA-N 4-amino-5-chloro-2-fluorophenol Chemical compound NC1=CC(F)=C(O)C=C1Cl GAICBADMNLLFDV-UHFFFAOYSA-N 0.000 claims description 3
- 238000010934 O-alkylation reaction Methods 0.000 claims description 3
- 239000003638 chemical reducing agent Substances 0.000 claims description 3
- 125000004428 fluoroalkoxy group Chemical group 0.000 claims description 3
- 125000000449 nitro group Chemical group [O-][N+](*)=O 0.000 claims description 3
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 claims description 3
- 239000011734 sodium Substances 0.000 claims description 3
- LGPYRVZYBRBHKQ-UHFFFAOYSA-N 2,3-difluoro-4-[(4-iodophenyl)diazenyl]phenol Chemical compound FC1=C(F)C(O)=CC=C1N=NC1=CC=C(I)C=C1 LGPYRVZYBRBHKQ-UHFFFAOYSA-N 0.000 claims description 2
- 125000004215 2,4-difluorophenyl group Chemical group [H]C1=C([H])C(*)=C(F)C([H])=C1F 0.000 claims description 2
- YBXASDXUIVUIBC-UHFFFAOYSA-N 2-fluoro-4-[(3-fluorophenyl)diazenyl]phenol Chemical compound C1=C(F)C(O)=CC=C1N=NC1=CC=CC(F)=C1 YBXASDXUIVUIBC-UHFFFAOYSA-N 0.000 claims description 2
- WZEKCICLMGNINA-UHFFFAOYSA-N 2-fluoro-4-[(4-fluorophenyl)diazenyl]phenol Chemical compound C1=C(F)C(O)=CC=C1N=NC1=CC=C(F)C=C1 WZEKCICLMGNINA-UHFFFAOYSA-N 0.000 claims description 2
- ZJRVVYZGFPHWMG-UHFFFAOYSA-N 3,5-difluoro-2-[(2-hydroxyphenyl)diazenyl]-4-phenylphenol Chemical compound FC=1C(=C(C=C(C1C1=CC=CC=C1)F)O)N=NC1=C(C=CC=C1)O ZJRVVYZGFPHWMG-UHFFFAOYSA-N 0.000 claims description 2
- KFEIZSCXZPJFDA-UHFFFAOYSA-N 3-fluoro-4-[(3-nitrophenyl)diazenyl]phenol Chemical compound FC1=CC(O)=CC=C1N=NC1=CC=CC([N+]([O-])=O)=C1 KFEIZSCXZPJFDA-UHFFFAOYSA-N 0.000 claims description 2
- LZEBZUCEZNCIGC-UHFFFAOYSA-N 3-fluoro-4-[(4-nitrophenyl)diazenyl]phenol Chemical compound FC1=CC(O)=CC=C1N=NC1=CC=C([N+]([O-])=O)C=C1 LZEBZUCEZNCIGC-UHFFFAOYSA-N 0.000 claims description 2
- MBJHQIQRKXVWMF-UHFFFAOYSA-N 4-[(2-bromophenyl)diazenyl]-2,6-difluorophenol Chemical compound C1=C(F)C(O)=C(F)C=C1N=NC1=CC=CC=C1Br MBJHQIQRKXVWMF-UHFFFAOYSA-N 0.000 claims description 2
- OHNDAXCVWUKVHF-UHFFFAOYSA-N 4-amino-2-(trifluoromethyl)phenol Chemical compound NC1=CC=C(O)C(C(F)(F)F)=C1 OHNDAXCVWUKVHF-UHFFFAOYSA-N 0.000 claims description 2
- BKAQTRFGKPSDDG-UHFFFAOYSA-N 4-amino-2-bromo-5-fluorophenol Chemical compound NC1=CC(Br)=C(O)C=C1F BKAQTRFGKPSDDG-UHFFFAOYSA-N 0.000 claims description 2
- FEIRBFCWDDTCEQ-UHFFFAOYSA-N 4-amino-2-chloro-3-fluorophenol Chemical compound NC1=CC=C(O)C(Cl)=C1F FEIRBFCWDDTCEQ-UHFFFAOYSA-N 0.000 claims description 2
- ZWUMTSUDDKDGNV-UHFFFAOYSA-N 4-amino-2-chloro-5-fluorophenol Chemical compound NC1=CC(Cl)=C(O)C=C1F ZWUMTSUDDKDGNV-UHFFFAOYSA-N 0.000 claims description 2
- VZTQQXJTENPIEL-UHFFFAOYSA-N 4-amino-2-chloro-6-(trifluoromethyl)phenol Chemical compound NC1=CC(Cl)=C(O)C(C(F)(F)F)=C1 VZTQQXJTENPIEL-UHFFFAOYSA-N 0.000 claims description 2
- KEODCIJNJZOHFD-UHFFFAOYSA-N 4-amino-2-chloro-6-fluorophenol Chemical compound NC1=CC(F)=C(O)C(Cl)=C1 KEODCIJNJZOHFD-UHFFFAOYSA-N 0.000 claims description 2
- VORRYOXJWMUREO-UHFFFAOYSA-N 4-amino-3-(trifluoromethyl)phenol Chemical compound NC1=CC=C(O)C=C1C(F)(F)F VORRYOXJWMUREO-UHFFFAOYSA-N 0.000 claims description 2
- MNPLTKHJEAFOCA-UHFFFAOYSA-N 4-amino-3-fluorophenol Chemical compound NC1=CC=C(O)C=C1F MNPLTKHJEAFOCA-UHFFFAOYSA-N 0.000 claims description 2
- UJDHXOLHYRKMRO-UHFFFAOYSA-N 4-amino-5-chloro-2-(trifluoromethyl)phenol Chemical compound NC1=CC(C(F)(F)F)=C(O)C=C1Cl UJDHXOLHYRKMRO-UHFFFAOYSA-N 0.000 claims description 2
- 125000001255 4-fluorophenyl group Chemical group [H]C1=C([H])C(*)=C([H])C([H])=C1F 0.000 claims description 2
- WRBFEAGPWCGHMN-UHFFFAOYSA-N 4-phenyldiazenyl-3-(trifluoromethyl)phenol Chemical compound FC(F)(F)C1=CC(O)=CC=C1N=NC1=CC=CC=C1 WRBFEAGPWCGHMN-UHFFFAOYSA-N 0.000 claims description 2
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 claims description 2
- JYVHNCDJZDJEKW-UHFFFAOYSA-N [4-[(2-fluoro-4-hydroxyphenyl)diazenyl]phenyl] thiocyanate Chemical compound FC1=CC(O)=CC=C1N=NC1=CC=C(SC#N)C=C1 JYVHNCDJZDJEKW-UHFFFAOYSA-N 0.000 claims description 2
- 150000001450 anions Chemical class 0.000 claims description 2
- 150000002431 hydrogen Chemical class 0.000 claims description 2
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 claims description 2
- 229910052708 sodium Inorganic materials 0.000 claims description 2
- QIGBRXMKCJKVMJ-UHFFFAOYSA-N Hydroquinone Chemical class OC1=CC=C(O)C=C1 QIGBRXMKCJKVMJ-UHFFFAOYSA-N 0.000 abstract description 2
- 150000002989 phenols Chemical class 0.000 abstract description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 24
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 16
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 15
- 239000000243 solution Substances 0.000 description 15
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 12
- LPXPTNMVRIOKMN-UHFFFAOYSA-M sodium nitrite Chemical compound [Na+].[O-]N=O LPXPTNMVRIOKMN-UHFFFAOYSA-M 0.000 description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 12
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 11
- 239000000203 mixture Substances 0.000 description 10
- 238000006722 reduction reaction Methods 0.000 description 10
- PAYRUJLWNCNPSJ-UHFFFAOYSA-N Aniline Chemical compound NC1=CC=CC=C1 PAYRUJLWNCNPSJ-UHFFFAOYSA-N 0.000 description 8
- 238000002451 electron ionisation mass spectrometry Methods 0.000 description 7
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 7
- IAZDPXIOMUYVGZ-WFGJKAKNSA-N Dimethyl sulfoxide Chemical compound [2H]C([2H])([2H])S(=O)C([2H])([2H])[2H] IAZDPXIOMUYVGZ-WFGJKAKNSA-N 0.000 description 6
- 239000003054 catalyst Substances 0.000 description 6
- 239000000047 product Substances 0.000 description 6
- 235000010288 sodium nitrite Nutrition 0.000 description 6
- 239000007787 solid Substances 0.000 description 6
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 5
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 5
- 238000005160 1H NMR spectroscopy Methods 0.000 description 4
- XTHFKEDIFFGKHM-UHFFFAOYSA-N Dimethoxyethane Chemical compound COCCOC XTHFKEDIFFGKHM-UHFFFAOYSA-N 0.000 description 4
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- IOVCWXUNBOPUCH-UHFFFAOYSA-M Nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 description 4
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 4
- 238000001035 drying Methods 0.000 description 4
- 239000000706 filtrate Substances 0.000 description 4
- 150000007529 inorganic bases Chemical class 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 150000002739 metals Chemical class 0.000 description 4
- 230000035484 reaction time Effects 0.000 description 4
- 239000002904 solvent Substances 0.000 description 4
- 238000003756 stirring Methods 0.000 description 4
- 239000000725 suspension Substances 0.000 description 4
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 3
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 3
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 150000001340 alkali metals Chemical class 0.000 description 3
- 125000003545 alkoxy group Chemical group 0.000 description 3
- 125000004432 carbon atom Chemical group C* 0.000 description 3
- 125000004122 cyclic group Chemical group 0.000 description 3
- 125000000664 diazo group Chemical group [N-]=[N+]=[*] 0.000 description 3
- 229910052763 palladium Inorganic materials 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 239000007858 starting material Substances 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
- MELBVUPITCGHMO-UHFFFAOYSA-N 2,3-difluoro-4-phenyldiazenylphenol Chemical compound FC1=C(F)C(O)=CC=C1N=NC1=CC=CC=C1 MELBVUPITCGHMO-UHFFFAOYSA-N 0.000 description 2
- FWVSFPKYHMZAHY-UHFFFAOYSA-N 2,5-difluoro-4-phenyldiazenylphenol Chemical compound C1=C(F)C(O)=CC(F)=C1N=NC1=CC=CC=C1 FWVSFPKYHMZAHY-UHFFFAOYSA-N 0.000 description 2
- INXKVYFOWNAVMU-UHFFFAOYSA-N 2,5-difluorophenol Chemical compound OC1=CC(F)=CC=C1F INXKVYFOWNAVMU-UHFFFAOYSA-N 0.000 description 2
- ULYNCHNOFPPFCY-UHFFFAOYSA-N 4-phenyldiazenyl-2-(trifluoromethoxy)phenol Chemical compound C1=C(OC(F)(F)F)C(O)=CC=C1N=NC1=CC=CC=C1 ULYNCHNOFPPFCY-UHFFFAOYSA-N 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-M Bicarbonate Chemical class OC([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-M 0.000 description 2
- 206010006458 Bronchitis chronic Diseases 0.000 description 2
- 101150041968 CDC13 gene Proteins 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- HEDRZPFGACZZDS-UHFFFAOYSA-N Chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 description 2
- IAZDPXIOMUYVGZ-UHFFFAOYSA-N Dimethylsulphoxide Chemical compound CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 description 2
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 2
- BZLVMXJERCGZMT-UHFFFAOYSA-N Methyl tert-butyl ether Chemical compound COC(C)(C)C BZLVMXJERCGZMT-UHFFFAOYSA-N 0.000 description 2
- HEDRZPFGACZZDS-MICDWDOJSA-N Trichloro(2H)methane Chemical compound [2H]C(Cl)(Cl)Cl HEDRZPFGACZZDS-MICDWDOJSA-N 0.000 description 2
- 206010006451 bronchitis Diseases 0.000 description 2
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 2
- MVPPADPHJFYWMZ-UHFFFAOYSA-N chlorobenzene Chemical compound ClC1=CC=CC=C1 MVPPADPHJFYWMZ-UHFFFAOYSA-N 0.000 description 2
- 208000007451 chronic bronchitis Diseases 0.000 description 2
- 238000004821 distillation Methods 0.000 description 2
- 150000002170 ethers Chemical class 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 125000001153 fluoro group Chemical group F* 0.000 description 2
- 125000005842 heteroatom Chemical group 0.000 description 2
- 150000004679 hydroxides Chemical class 0.000 description 2
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 238000006396 nitration reaction Methods 0.000 description 2
- 239000003960 organic solvent Substances 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 150000003254 radicals Chemical class 0.000 description 2
- 239000000376 reactant Substances 0.000 description 2
- IIACRCGMVDHOTQ-UHFFFAOYSA-N sulfamic acid Chemical compound NS(O)(=O)=O IIACRCGMVDHOTQ-UHFFFAOYSA-N 0.000 description 2
- VZGDMQKNWNREIO-UHFFFAOYSA-N tetrachloromethane Chemical compound ClC(Cl)(Cl)Cl VZGDMQKNWNREIO-UHFFFAOYSA-N 0.000 description 2
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 2
- 125000005034 trifluormethylthio group Chemical group FC(S*)(F)F 0.000 description 2
- 125000004642 (C1-C12) alkoxy group Chemical group 0.000 description 1
- 125000004178 (C1-C4) alkyl group Chemical group 0.000 description 1
- DNIAPMSPPWPWGF-GSVOUGTGSA-N (R)-(-)-Propylene glycol Chemical compound C[C@@H](O)CO DNIAPMSPPWPWGF-GSVOUGTGSA-N 0.000 description 1
- FKTXDTWDCPTPHK-UHFFFAOYSA-N 1,1,1,2,3,3,3-heptafluoropropane Chemical group FC(F)(F)[C](F)C(F)(F)F FKTXDTWDCPTPHK-UHFFFAOYSA-N 0.000 description 1
- SYYSBZOSEAUMEY-UHFFFAOYSA-N 1,1,1-trifluoro-2-$l^{1}-sulfanylethane Chemical group FC(F)(F)C[S] SYYSBZOSEAUMEY-UHFFFAOYSA-N 0.000 description 1
- FIARMZDBEGVMLV-UHFFFAOYSA-N 1,1,2,2,2-pentafluoroethanolate Chemical group [O-]C(F)(F)C(F)(F)F FIARMZDBEGVMLV-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
- 238000004293 19F NMR spectroscopy Methods 0.000 description 1
- 125000004206 2,2,2-trifluoroethyl group Chemical group [H]C([H])(*)C(F)(F)F 0.000 description 1
- RPEPGIOVXBBUMJ-UHFFFAOYSA-N 2,3-difluorophenol Chemical compound OC1=CC=CC(F)=C1F RPEPGIOVXBBUMJ-UHFFFAOYSA-N 0.000 description 1
- GQWMNVOVQZIPJC-UHFFFAOYSA-N 2-(trifluoromethoxy)phenol Chemical compound OC1=CC=CC=C1OC(F)(F)F GQWMNVOVQZIPJC-UHFFFAOYSA-N 0.000 description 1
- 125000004493 2-methylbut-1-yl group Chemical group CC(C*)CC 0.000 description 1
- HJSSBIMVTMYKPD-UHFFFAOYSA-N 3,5-difluorophenol Chemical compound OC1=CC(F)=CC(F)=C1 HJSSBIMVTMYKPD-UHFFFAOYSA-N 0.000 description 1
- VUEHSLTXLWVCMC-UHFFFAOYSA-N 4-(fluoroamino)phenol Chemical class OC1=CC=C(NF)C=C1 VUEHSLTXLWVCMC-UHFFFAOYSA-N 0.000 description 1
- BTJIUGUIPKRLHP-UHFFFAOYSA-N 4-nitrophenol Chemical compound OC1=CC=C([N+]([O-])=O)C=C1 BTJIUGUIPKRLHP-UHFFFAOYSA-N 0.000 description 1
- XDTMQSROBMDMFD-UHFFFAOYSA-N Cyclohexane Chemical compound C1CCCCC1 XDTMQSROBMDMFD-UHFFFAOYSA-N 0.000 description 1
- ZAFNJMIOTHYJRJ-UHFFFAOYSA-N Diisopropyl ether Chemical compound CC(C)OC(C)C ZAFNJMIOTHYJRJ-UHFFFAOYSA-N 0.000 description 1
- FXHOOIRPVKKKFG-UHFFFAOYSA-N N,N-Dimethylacetamide Chemical compound CN(C)C(C)=O FXHOOIRPVKKKFG-UHFFFAOYSA-N 0.000 description 1
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 description 1
- ZWXPDGCFMMFNRW-UHFFFAOYSA-N N-methylcaprolactam Chemical compound CN1CCCCCC1=O ZWXPDGCFMMFNRW-UHFFFAOYSA-N 0.000 description 1
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 1
- KJTLSVCANCCWHF-UHFFFAOYSA-N Ruthenium Chemical compound [Ru] KJTLSVCANCCWHF-UHFFFAOYSA-N 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- DWAQJAXMDSEUJJ-UHFFFAOYSA-M Sodium bisulfite Chemical compound [Na+].OS([O-])=O DWAQJAXMDSEUJJ-UHFFFAOYSA-M 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical group [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- AZFNGPAYDKGCRB-XCPIVNJJSA-M [(1s,2s)-2-amino-1,2-diphenylethyl]-(4-methylphenyl)sulfonylazanide;chlororuthenium(1+);1-methyl-4-propan-2-ylbenzene Chemical compound [Ru+]Cl.CC(C)C1=CC=C(C)C=C1.C1=CC(C)=CC=C1S(=O)(=O)[N-][C@@H](C=1C=CC=CC=1)[C@@H](N)C1=CC=CC=C1 AZFNGPAYDKGCRB-XCPIVNJJSA-M 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 125000001931 aliphatic group Chemical group 0.000 description 1
- 150000008044 alkali metal hydroxides Chemical class 0.000 description 1
- 229910000272 alkali metal oxide Inorganic materials 0.000 description 1
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 1
- 229910001860 alkaline earth metal hydroxide Inorganic materials 0.000 description 1
- 125000004414 alkyl thio group Chemical group 0.000 description 1
- 239000002168 alkylating agent Substances 0.000 description 1
- 229940100198 alkylating agent Drugs 0.000 description 1
- 230000029936 alkylation Effects 0.000 description 1
- 238000005804 alkylation reaction Methods 0.000 description 1
- 150000001408 amides Chemical class 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 150000005840 aryl radicals Chemical group 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical group [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000004202 carbamide Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 150000001721 carbon Chemical group 0.000 description 1
- BEYOBVMPDRKTNR-UHFFFAOYSA-N chembl79759 Chemical class C1=CC(O)=CC=C1N=NC1=CC=CC=C1 BEYOBVMPDRKTNR-UHFFFAOYSA-N 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 125000004093 cyano group Chemical group *C#N 0.000 description 1
- 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 1
- 125000001511 cyclopentyl group Chemical group [H]C1([H])C([H])([H])C([H])([H])C([H])(*)C1([H])[H] 0.000 description 1
- 229940117389 dichlorobenzene Drugs 0.000 description 1
- 230000007717 exclusion Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 125000003709 fluoroalkyl group Chemical group 0.000 description 1
- 239000003502 gasoline Substances 0.000 description 1
- 150000008282 halocarbons Chemical class 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 125000001072 heteroaryl group Chemical group 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
- PNDPGZBMCMUPRI-UHFFFAOYSA-N iodine Chemical group II PNDPGZBMCMUPRI-UHFFFAOYSA-N 0.000 description 1
- 229910052741 iridium Inorganic materials 0.000 description 1
- GKOZUEZYRPOHIO-UHFFFAOYSA-N iridium atom Chemical compound [Ir] GKOZUEZYRPOHIO-UHFFFAOYSA-N 0.000 description 1
- 125000001972 isopentyl group Chemical group [H]C([H])([H])C([H])(C([H])([H])[H])C([H])([H])C([H])([H])* 0.000 description 1
- 125000001449 isopropyl group Chemical group [H]C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 150000002736 metal compounds Chemical class 0.000 description 1
- BLLFVUPNHCTMSV-UHFFFAOYSA-N methyl nitrite Chemical compound CON=O BLLFVUPNHCTMSV-UHFFFAOYSA-N 0.000 description 1
- 150000007522 mineralic acids Chemical class 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
- 125000003136 n-heptyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 125000001280 n-hexyl group Chemical group C(CCCCC)* 0.000 description 1
- JIKUXBYRTXDNIY-UHFFFAOYSA-N n-methyl-n-phenylformamide Chemical compound O=CN(C)C1=CC=CC=C1 JIKUXBYRTXDNIY-UHFFFAOYSA-N 0.000 description 1
- 125000000740 n-pentyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 125000004123 n-propyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 125000001971 neopentyl group Chemical group [H]C([*])([H])C(C([H])([H])[H])(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Substances N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 125000005246 nonafluorobutyl group Chemical group FC(F)(F)C(F)(F)C(F)(F)C(F)(F)* 0.000 description 1
- 229910052760 oxygen Chemical group 0.000 description 1
- 239000001301 oxygen Chemical group 0.000 description 1
- 125000006340 pentafluoro ethyl group Chemical group FC(F)(F)C(F)(F)* 0.000 description 1
- 125000003538 pentan-3-yl group Chemical group [H]C([H])([H])C([H])([H])C([H])(*)C([H])([H])C([H])([H])[H] 0.000 description 1
- 125000005007 perfluorooctyl group Chemical group FC(C(C(C(C(C(C(C(F)(F)F)(F)F)(F)F)(F)F)(F)F)(F)F)(F)F)(F)* 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 235000010289 potassium nitrite Nutrition 0.000 description 1
- 239000004304 potassium nitrite Substances 0.000 description 1
- 239000012429 reaction media Substances 0.000 description 1
- 238000001953 recrystallisation Methods 0.000 description 1
- 229910052703 rhodium Inorganic materials 0.000 description 1
- 239000010948 rhodium Substances 0.000 description 1
- MHOVAHRLVXNVSD-UHFFFAOYSA-N rhodium atom Chemical compound [Rh] MHOVAHRLVXNVSD-UHFFFAOYSA-N 0.000 description 1
- 229910052707 ruthenium Inorganic materials 0.000 description 1
- 150000003839 salts Chemical class 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
- 125000003548 sec-pentyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- CDBYLPFSWZWCQE-UHFFFAOYSA-L sodium carbonate Substances [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 229940079827 sodium hydrogen sulfite Drugs 0.000 description 1
- 235000010267 sodium hydrogen sulphite Nutrition 0.000 description 1
- 125000001424 substituent group Chemical group 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- HXJUTPCZVOIRIF-UHFFFAOYSA-N sulfolane Chemical compound O=S1(=O)CCCC1 HXJUTPCZVOIRIF-UHFFFAOYSA-N 0.000 description 1
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 description 1
- 150000003457 sulfones Chemical class 0.000 description 1
- 150000003460 sulfonic acids Chemical class 0.000 description 1
- 150000003462 sulfoxides Chemical class 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Chemical group 0.000 description 1
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- 150000005622 tetraalkylammonium hydroxides Chemical class 0.000 description 1
- YONPGGFAJWQGJC-UHFFFAOYSA-K titanium(iii) chloride Chemical compound Cl[Ti](Cl)Cl YONPGGFAJWQGJC-UHFFFAOYSA-K 0.000 description 1
- 125000000876 trifluoromethoxy group Chemical group FC(F)(F)O* 0.000 description 1
- 238000001291 vacuum drying Methods 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C245/00—Compounds containing chains of at least two nitrogen atoms with at least one nitrogen-to-nitrogen multiple bond
- C07C245/02—Azo compounds, i.e. compounds having the free valencies of —N=N— groups attached to different atoms, e.g. diazohydroxides
- C07C245/06—Azo compounds, i.e. compounds having the free valencies of —N=N— groups attached to different atoms, e.g. diazohydroxides with nitrogen atoms of azo groups bound to carbon atoms of six-membered aromatic rings
- C07C245/08—Azo compounds, i.e. compounds having the free valencies of —N=N— groups attached to different atoms, e.g. diazohydroxides with nitrogen atoms of azo groups bound to carbon atoms of six-membered aromatic rings with the two nitrogen atoms of azo groups bound to carbon atoms of six-membered aromatic rings, e.g. azobenzene
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
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- C07C215/00—Compounds containing amino and hydroxy groups bound to the same carbon skeleton
- C07C215/74—Compounds containing amino and hydroxy groups bound to the same carbon skeleton having hydroxy groups and amino groups bound to carbon atoms of six-membered aromatic rings of the same carbon skeleton
- C07C215/76—Compounds containing amino and hydroxy groups bound to the same carbon skeleton having hydroxy groups and amino groups bound to carbon atoms of six-membered aromatic rings of the same carbon skeleton of the same non-condensed six-membered aromatic ring
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- C07C217/00—Compounds containing amino and etherified hydroxy groups bound to the same carbon skeleton
- C07C217/78—Compounds containing amino and etherified hydroxy groups bound to the same carbon skeleton having amino groups and etherified hydroxy groups bound to carbon atoms of six-membered aromatic rings of the same carbon skeleton
- C07C217/80—Compounds containing amino and etherified hydroxy groups bound to the same carbon skeleton having amino groups and etherified hydroxy groups bound to carbon atoms of six-membered aromatic rings of the same carbon skeleton having amino groups and etherified hydroxy groups bound to carbon atoms of non-condensed six-membered aromatic rings
- C07C217/82—Compounds containing amino and etherified hydroxy groups bound to the same carbon skeleton having amino groups and etherified hydroxy groups bound to carbon atoms of six-membered aromatic rings of the same carbon skeleton having amino groups and etherified hydroxy groups bound to carbon atoms of non-condensed six-membered aromatic rings of the same non-condensed six-membered aromatic ring
- C07C217/84—Compounds containing amino and etherified hydroxy groups bound to the same carbon skeleton having amino groups and etherified hydroxy groups bound to carbon atoms of six-membered aromatic rings of the same carbon skeleton having amino groups and etherified hydroxy groups bound to carbon atoms of non-condensed six-membered aromatic rings of the same non-condensed six-membered aromatic ring the oxygen atom of at least one of the etherified hydroxy groups being further bound to an acyclic carbon atom
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Abstract
本发明涉及卤化的4-氨基苯酚和卤化的4-(苯基-二氮烯基)苯酚,涉及它们的制备方法,以及,将卤化的4-羟基-苯酚应用于制备活性中间体,尤其在药物和农用化肥领域中的中间体。
Description
本发明涉及卤代的4-氨基苯酚和4-(苯基-二氮烯基)苯酚、它们的制备方法以及用卤代的4-羟基-苯酚制备药物和农用化肥中的活性成分。
卤代的苯酚,尤其氟代苯酚,是制备药物和农用化肥中活性成分的有价值原料,由于氟取代基增加亲油性,因此增加整个活性组分分子的膜渗透性。例如,氟代4-羟基苯胺,特别适合作为制备治疗慢性支气管炎的活性组分的起始原料(可参见WO 03/08413和PCT/03/02154)。
例如,2,5-二氟-4-羟基苯胺的制备,通常通过硝化2,5-二氟苯酚和随后的还原来进行(参见JP-A 63 310850)。
这一合成途径的缺点是:硝化反应不能选择性进行,所需作为中间体的4-硝基苯酚的收率很差。
因此,需要提供一种简便且收率高的方法制备卤代的4-氨基苯酚的方法。
已发现制备如下式(I)化合物的方法
其中,
m是0,1,2或3,
n是1,2,3或4
这里,m+n的和最大是4,
R1是氢,C1-C12-烷基或C5-C15芳烷基,
R2分别是C1-C12-氟烷基,C1-C12-氟代烷硫基或C1-C12-氟代烷氧基,
Hal分别是溴,氯或氟,
特征在于:
在步骤A1)中,式(II)的化合物转化为(II)的重氮盐;
其中,
p是0,1,2或3,
R3分别是氟,氯,溴,碘,氰基,氰硫基,羟基磺酰基或它们的碱金属盐,硝基,C1-C12-烷基,C1-C12-氟烷基,C1-C12-氟代烷氧基,C1-C12-氟代烷硫基,C1-C12-烷氧基,C1-C12-烷氧基羰基,二(C1-C12-烷基)氨基,C4-C14-芳基或C5-C15-芳基烷基:
其中,An-是酸的阴离子。
在步骤A2)中,
式(III)的重氮盐与式(IV)的化合物在碱的存在下反应,得到式(V)的化合物。
其中,
m,n,Hal和R2如对式(I)所定义的,
在步骤B)中,用还原试剂,使式(V)的化合物转化成式(I)的化合物,其中,R1是氢。
任选地,在步骤C)中,这些化合物通过O-烷基化,转化成式(I)的化合物,其中,R1是C1-C12-烷基。
这不包括制备4-氨基-3,5-二氟苯酚和4-氨基-氟苯酚。
任选地,在步骤D)中,
式(I)的化合物,通过与式(VIIa)或(VIIb)的化合物反应,转化成式(VIII)的化合物。
其中,
R4是2,4-二氟苯基,4-氟苯基,2,3-二氟苯基或4-氟-3-氯-苯基,
R5是任选的单-或多-氯苯酚或-氟取代的苯基。
其中,
R1,R2,R4,Hal,n和m分别按上面定义。
步骤D)可以已知的方式进行,例如,类似于美国专利4,851,535中所描述的方法。
任选地,在步骤E)中,
式(VIII)的化合物,通过与式(IX)的化合物反应,可转化成式(X)的化合物。
其中,
R6是C1-C12-烷基,C5-C15-芳基烷基或C4-C14-芳基,
其中,
R1,R2,R4,R6,Hal,n和m分别按上面定义。
式(VIII)化合物与式(IX)化合物反应,得到式(X)化合物,例如,可通过加热在有机溶剂中的两个反应物进行,溶剂优选为脂族醇,如甲醇。
作为步骤A)到C)的例外所提到的化合物,不以相同的形式包括在步骤D)和E)中。
本发明的上下文中,上述以及下面列出的所有原子团定义,参数和图解,在常规或特定的优选区域内,即,特定的区域和优选的区域,可按需要组合。
烷基和烷氧基分别是直链、环状、支链的或无支链的烷基和烷氧基。它同样应用于芳烷基的非芳香基部分。
C1-C4-烷基,例如是:甲基,乙基,正丙基,异丙基,正丁基,仲丁基和叔丁基,C1-C12-烷基,例如是:正戊基,1-甲基丁基,2-甲基丁基,3-甲基丁基,新戊基,1-乙基丙基,环己基,环戊基,正己基,正庚基,正辛基,正壬基,正癸基和正十二烷基。
氟烷基,氟烷氧基和氟代烷硫基分别是直链的,环状的,支链的或无支链的烷基,烷氧基和烷硫基基团,它们分别被氟原子单取代、多取代或全部取代。
例如,C1-C12-氟烷基是三氟甲基,2,2,2-三氟乙基,五氟乙基,九氟丁基,七氟异丙基,全氟辛基和全氟十二烷基。
例如,C1-C12-氟烷氧基是三氟甲氧基,2,2,2-三氟乙氧基,五氟乙氧基,九氟丁氧基,七氟异丙氧基,全氟辛氧基和全氟十二烷氧基。
例如,C1-C12-氟代烷硫基是三氟甲硫基,2,2,2-三氟乙硫基,五氟乙硫基,九氟丁硫基,七氟异丙硫基,全氟辛硫基和全氟十二烷硫基。
芳基分别是有5-14个骨架碳原子的杂芳基,每个环有零,1,2或3个骨架碳原子可被杂原子取代,但在整个分子中至少一个骨架碳原子可被杂原子取代,杂原子选自氮,硫,氧,优选有6-14个骨架碳原子的碳环芳族基团。
另外,碳环芳族基团或杂芳族基团的每个环上可被最多5个相同或不同的取代基取代,它们选自氟,氰基,硝基,C1-C12-烷基,C1-C12-氟烷基,C1-C12-氟烷氧基,C1-C12-氟了烷硫基,C1-C12-烷氧基,二(C1-C12-烷基)氨基。
芳烷基分别是如上面定义的直链的,环状的,分支或无支链的烷基,它们各自可被上面定义的芳基单取代,多取代或全部取代。
优选的取代形式定义如下:
n 优选1或2,
m 优选0或1,
R1 优选氢或甲基,更优选氢,
R2 优选三氟甲基,三氟甲氧基和三氟甲硫基,
Hal 优选溴,氯或氟,至少一个卤素基团更优选氟。
在式(II)的化合物中,p优选0。
发明的方法特别适合于制备4-氨基-2,3-二氟苯酚,4-氨基-2,5-二氟苯酚,4-氨基2,6-二氟苯酚,4-氨基-2-氟苯酚,4-氨基-3-氯-5-氟苯酚,4-氨基-3-氯-2-氟苯酚、4-氨基-5-氯-2-氟苯酚、4-氨基-3-溴-5-氟苯酚,4-氨基-2-(三氟甲氧基)苯酚和4-氨基-3-(三氟甲氧基)苯酚。
式(I)的许多化合物是新颖的,并且是本发明所包括的,尽管对非除下面这些:4-氨基-3,5-二氟苯酚,4-氨基-2,5-二氟苯酚,4-氨基-2,6-二氟苯酚,4-氨基-2-氯-6-氟苯酚,4-氨基-2-氯-3-氟苯酚,4-氨基-2-氯-5-氟苯酚,4-氨基-2-溴-5-氟苯酚,4-氨基-2-氟苯酚,4-氨基-3-氟苯酚,4-氨基-2-(三氟甲基)苯酚,4-氨基-5-氯-2-(三氟甲基)苯酚,4-氨基-2-氯-6-(三氟甲基)苯酚和4-氨基-3-(三氟甲基)-苯酚。
特别优选的式(I)的各化合物包括:
4-氨基-2,3-二氟苯酚,4-氨基-3-氯-5-氟苯酚,4-氨基-3-氯-2-氟苯酚,4-氨基-5-氯-2-氟苯酚,4-氨基-3-溴-5-氟苯酚,4-氨基-2-(三氟甲氧基)苯酚和4-氨基-3-(三氟甲氧基)苯酚。
在步骤A1)中,式(III)化合物本身可以已知的方法从式(II)化合物制备。有利的是,式(II)化合物、在水和酸的存在下,与亚硝酸盐源反应。
使用的酸可以是无机酸,比如:氢氯酸,氢溴酸,硫酸或四氟溴酸,或有机磺酸。
使用的亚硝酸盐源可以是例如碱金属亚硝酸盐,尤其是亚硝酸钠或亚硝酸钾,也可以是有机亚硝酸酯,尤其是亚硝酸四-丁酯或亚硝酸甲酯。优选使用溶解在水中的碱金属亚硝酸盐,作为参考。
使用的酸的质子与式(II)化合物的摩尔比,可以是如1至15,优选2至10,更优选2.5至6.5。
式(II)对亚硝酸盐源的摩尔比,可以是如0.8至4,优选1.0至2.5,更优选1.05至1.5。
在步骤A1)中的反应温度可以是如-20℃至40℃,优选-10℃至20℃,更优选-5℃至10℃;反应压力可以是0.5-100巴,优选常压;反应时间可以是10分钟到5小时,优选1小时到3小时。
为了转化式(II)的化合物,方法是:例如,开始将式(II)的化合物放在水和酸中,随后加入碱金属亚硝酸盐的水溶液。在反应完成时,加入伯氨基化合物,例如,尿素或酰氨基硫酸,破坏过量的碱金属亚硝酸盐。
步骤A1)需要的式(II)起始化合物,可从文献知道,或者,按照文献的类似方法合成。
步骤A)中,在步骤A1)获得的式(II)化合物与式(IV)化合物在碱存在下反应,得到式(V)化合物。
适合的碱,原则上是比式(IV)更碱性,优选至少2pK单位的所有碱。
优选用碱金属或碱土金属氢氧化物,碳酸盐和碳酸氢盐,特别优选碱金属氢氧化物,如,氢氧化钠。
碱可在最初加入,或者,在反应过程中以保持反应介质碱性的方式加入。
式(III)化合物与式(IV)化合物的摩尔比,可以是如0.3至5,优选0.5至2,更优选0.6:0至9。
式(III)化合物对碱的摩尔比,可以是如1至15,优选3至10,更优选4至7。
在步骤A2)中的反应温度可以是-20℃到50℃,优选0℃到40℃,更优选5℃到30℃,反应压力,例如0.5到100巴,优选常压。另外,反应时间可以是10分钟到15小时,优选3到5小时。
式(V)化合物本身可按已知方式获取,可通过提取、然后蒸馏的方式,或者,在式(V)在30℃是固体的情况下,通过过滤和结晶获取。
本发明包括式(V)化合物作为重要中间体,虽然不包括下列化合物,:3,5-二氟-4-苯基偶氮苯酚,3-氟-4-苯基偶氮苯酚,3-氟-4-(4’-硝基苯基偶氮)苯酚,3-氟-4-(3’-硝基苯基偶氮)苯酚,3-氟-4-(4’-硫氰基苯基偶氮)苯酚,3-氟-4-(4’-硫代苯基偶氮)苯酚,4-(2’-氟-4’-羟基苯基偶氮)苯甲酸乙酯,2-氟-4-(4’-氟苯基偶氮)苯酚,2-氟-4(3’-氟苯基偶氮)苯酚,2-氟-4-(4’-硫代苯基偶氮)苯酚,4-(3’-氟-4’-羟基苯基偶氮)苯甲酸乙酯,2,3-二氟-4-(4’-碘代苯基偶氮)苯酚,2,3-二氟-4(4’-硫代苯基偶氮)苯酚和2,6-二氟-4-(2’-溴代苯基偶氮)苯酚,3-(三氟甲基)-4-(苯基偶氮)苯酚和3-(三氟甲基)-4-(4’-磺酸钠苯基偶氮)苯酚。
式(IV)化合物,可从文献知道,或者,以按照文献中类似的方法合成。
在步骤B)中,式(V)化合物,可通过还原转化为式(I)化合物。
还原可通过还原试剂实施,如亚硫酸氢钠,氯化钛(III)或锌和氢氯酸。还原在氢和催化剂的存在下进行更为有利。
优选的催化剂例如是金属或金属化合物,尤其是镍、钯、铂、钴、铑、铱和钌的盐或络合物,优选的金属的例子如:镍或钯。金属优选以细分的形式使用,例如作为阮内金属,或应用到载体上。
特别优选:用氢和在碳上钯进行还原。
步骤B)的还原可以在0℃到200℃,优选10℃到80℃,更优选20℃到40℃的反应温度下进行。
还原中氢气的分压可以是0.1-180巴,优选0.5-50巴,更优选1-3巴。
任选地和优选,在溶剂的存在下进行还原,只要在选择的反应条件下,它们是基本上是惰性。
适合的溶剂例如是脂族,脂环族或芳香族的任选卤化的烃,例如,汽油,苯,甲苯,二甲苯,氯苯,二氯苯,石油醚,己烷,环己烷,二氯甲烷,氯仿或四氯化碳;醚,例如,二乙醚,二异丙醚,二噁烷,四氢呋喃,或乙二醇二甲醚或乙二醇二乙醚;醇,例如,甲醇,乙醇和异丙醇,或溶剂的混合物。
在特别优选的实施方式中,在活性碳上钯的存在下并在甲醇或乙醇的存在下,在1-3巴氢气分压下进行还原。
还原反应的反应时间可以是10分钟-100小时,优选2-20小时。
其中的R1是氢的式(I)化合物的本身可以已知的方式获取,通过提取,随后蒸馏进行,或者,在30℃式(I)化合物是固体的情况下,通过重结晶获取。
任选地,进行步骤C),进行R1是氢的式(I)化合物的O-烷基化。
在这种情况下,优选在无机碱的存在下进行反应。
合适的无机碱,原则上是比R1是氢的式(I)化合物更碱性,优选至少3pK单位的所有碱。
优选的无机碱是碱金属或碱土金属的碳酸盐,碳酸氢盐,和氢氧化物,还有氢氧化四烷基铵,其中优选:碱金属的碳酸盐和氢氧化物。
合适的烷基化试剂,特别是式(VI)的化合物
R1-Act (VI)
其中,
R1是C1-C12-烷基,C5-C15芳烷基,
Act是碘,溴,氯或磺酸盐。
进行烷基化的合适溶剂,尤其是醚,如:甲基叔丁基醚,二噁烷,四氢呋喃,或乙二醇二甲醚或乙二醇二乙醚;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,N-甲基己内酰胺或六甲基磷酰胺;亚砜,如:二甲基亚砜;砜,如:环丁砜,或这些有机溶剂的混合物。
无机碱对R1是氢的式(I)化合物的摩尔比,可以是如0.3至5,优选0.5至3,更优选0.9至1.3。
步骤C)的反应温度可以是-70℃到100℃,优选-20℃到60℃,更优选0℃到40℃。
步骤C)的反应时间,可以是10分钟-24小时,优选1-8小时。
以本发明的方式,由易得到的反应物,可以高收率得到式(VIII)和(X)的化合物。式(I),(VIII)和(X)的化合物,还有式(V)的化合物,特别适用于制备药物和农用化肥的活性组分的过程中。
药物的优选活性成分,是用于治疗慢性支气管炎的那些组分,参考WO 03/0841和PCT 03/02154中所描述的。
实施例
实施例1
制备3,5-二氟-4-(苯基二氮烯基)苯酚
在0℃,将108.2克(1.16摩尔)的苯胺于剧烈搅拌下溶解在500克27%氢氯酸中。此后,在5℃-0℃,滴加95.2克(1.38摩尔)亚硝酸钠(溶解在283毫升水中),加完后,继续搅拌溶液60分钟。过量的亚硝酸钠用氨基硫酸破坏。
在另一烧瓶中,将101.2克(0.77摩尔)3,5-二氟苯酚溶解在182.8克(4.57摩尔)氢氧化钠的2281毫升水溶液中,预冷却到5℃。将上面新鲜制备的重氮盐加入到该溶液,加入的速率使内部温度上升不超过5℃。在加入期间,有规律地监控pH。添加完毕后,使混合物回热至室温,搅拌60分钟,用2N HCl调节该悬浮液至pH4。过滤产物,用水反复洗涤。在真空干燥箱中干燥,得到182克(定量收率)要求的橙棕色偶氮化合物。
EI-MS:m/z 234[M]+
实施例2
制备4-氨基-3,5-二氟苯酚
最初,将20.4克(0.09摩尔)来自实施例1的3,5-二氟-4-(苯基二氮烯基)苯酚,和0.5克Pd/C(10%)加入到120毫升甲醇中。溶液脱气,并充入氢气。在1巴氢气氛下,室温搅拌混合物16小时。氢气摄入完成后,滤去催化剂,滤液在旋转蒸发器上浓缩。残留物在硅胶(正己烷/乙酸乙酯,3∶1)上层析。产生的固体用正己烷搅样并干燥。得到7.6克(60%)4-氨基-3,5-二氟苯酚,棕黄色固体。
1H NMR(400MHz,CDC13):δ=3.40(s,2H,NH2);4.55(s,1H,OH);6.39(m,2H,Ar-H)
19F NMR(376.3MHz,CDC13):δ=-130.5
EI-MS:m/z 145[M]+
熔点:150-151℃
实施例3
制备2,3-二氟-4-(苯基二氮烯基)苯酚
在0℃,剧烈搅拌下将27.4毫升(0.3摩尔)的苯胺加入到140毫升HCl(50%浓度(semiconc.))中。此后,在5℃-0℃,滴加21.7克(0.315摩尔)亚硝酸钠(溶解在100毫升水中),添加完毕后,继续搅拌溶液20分钟。
在另一烧瓶中,将39克(0.3摩尔)2,3-二氟苯酚,溶解在300毫升2N NaOH中,预冷却到0℃。将上面新鲜制备的重氮溶液,加入到该溶液中,其速率使内部温度上升不超过5℃。在加入期间,有规律地监控pH,如果需要,再次以Na2CO3进行碱化。添加完毕后,使混合物回热至室温,再搅拌30分钟,然后用2N HCl调节悬浮液至pH3-4。过滤产物,用水反复洗涤。在真空干燥箱中干燥,得到61克(87%)要求的淡黄色偶氮化合物。
EI-MS:m/z 234[M]+
实施例4
制备4-氨基-2,3-二氟苯酚
最初,将61克(0.26摩尔)来自实施例3的2,3-二氟-4-(苯基二氮烯基)苯酚,和1克Pd/C(10%)加入到800毫升乙醇中。溶液脱气并充入氢气。在1巴氢气氛下,室温搅拌混合物18小时。氢气摄入完成后,滤去催化剂,滤液在旋转蒸发器上浓缩,在浓缩的过程中产物已结晶出来。滤出产生的固体,用少量冷乙醇洗涤,高真空下干燥4小时。得到28克(74%)要求的化合物,为淡棕色粉末。
1H NMR(400MHz,DMSO-d6):δ=3.72(s,2H,NH2);6.39(t,1H,Ar-H),6.51(t,1H,Ar-H),9.13(s,1H,OH)
EI-MS:m/z 145[M]+
实施例5
制备2,5-二氟-4-(苯基二氮烯基)苯酚
在0℃,剧烈搅拌下将17.5毫升(0.19摩尔)苯胺加入到185毫升HCl(50%浓度)中。此后,在5℃-0℃,滴加13.9克(0.2摩尔)亚硝酸钠(溶解在50毫升水中),添加完毕后,再搅拌该溶液20分钟。
在另一烧瓶中,将25克(0.19摩尔)2,5-二氟苯酚溶解在190毫升的2N NaOH中,预冷到0℃。将上面新鲜制备的重氮溶液加入到该溶液中,其速率使内部温度上升不超过5℃。在加入期间,有规律地监控pH,如果需要,再次以Na2CO3进行碱化。在加完后,使混合物回热至室温,再搅拌30分钟,用2N HCl调节悬浮液至pH3-4。过滤产物,用水反复洗涤。在50℃的真空干燥箱干燥后,得到42克(93%)要求的橙色偶氮化合物。
EI-MS:m/z 234[M]+
实施例6
制备4-氨基-2,5-二氟苯酚
最初,将42克(0.18摩尔)来自实施例5的2,5-二氟-4-(苯基二氮烯基)苯酚和1克Pd/C(10%)加入到650毫升乙醇中。溶液脱气,并充入氢气。在1巴氢气氛围下,室温下搅拌混合物18小时。氢气摄入完成后,滤去催化剂,滤液减压浓缩,在70℃,高真空下干燥4小时。残留物(24克)用乙醇重结晶并干燥。得到15克(60%)的4-氨基-2,5-二氟苯酚,橙-棕色粉末。
1H NMR(400MHz,DMSO-d6):δ=4.68(s,2H,NH2);6.58(m,2H,Ar-H),9.05(s,1H,OH);
EI-MS:m/z 145[M]+
实施例7
制备2-三氟甲氧基-4-(苯基二氮烯基)苯酚
在0℃,剧烈搅拌下将10.23毫升(0.11毫摩尔)的苯胺滴加到50毫升HCl(50%浓度)中。此后,在5℃-0℃,滴加8.1克(0.117摩尔)亚硝酸钠(溶解在30毫升水中),添加完毕后,再搅拌溶液20分钟。
在另一烧瓶中,将20克(0.12摩尔)2-三氟甲氧基苯酚溶解在140毫升的2NNaOH中,预冷却到0℃。将上面新鲜制备的重氮溶液加入到该溶液中,其速率使内部温度上升不超过5℃。在加入期间,有规律地监控pH,如果需要,再次用Na2CO3进行碱化。添加完毕后,使混合物回热至室温,搅拌30分钟,用2N HCl调节悬浮液至pH3-4。过滤产物,用水反复洗涤。真空干燥箱干燥后,得到26克(81%)要求的淡棕色偶氮化合物。
实施例8
制备4-氨基-2-三氟甲氧基苯酚的制备
最初,将25克(0.09摩尔)来自实施例7的2-三氟甲氧基-4-(苯基二氮烯基)苯酚和1克Pd/C(10%)加入到350毫升乙醇中。溶液脱气,并充入氢气。在1巴氢气氛下,室温下搅拌混合物72小时。氢气摄入完成后,滤去催化剂,滤液在旋转蒸发器上浓缩,在浓缩的过程中产物已结晶出来。抽吸滤出产生的固体,用少量冷的乙醇洗涤,高真空下干燥4小时。得到8.5克(50%)要求的化合物,为淡棕色粉末。
1H NMR(400MHz,DMSO-d6):δ=4.72(s,2H,NH2);6.42(d,1H,J=8.6Hz,Ar-H),6.5(s,1H,Ar-H),6.72(d,1H,J=8.6Hz,Ar-H),8.9(s,1H,OH)。
EI-MS:m/z 193[M]+
Claims (7)
1.一种制备式(I)化合物的方法,
其中,
m是0,1,2或3,
n是1,2,3或4
m+n的和最大是4,
R1是氢,C1-C12-烷基或C5-C15芳烷基,
R2分别是C1-C12-氟烷基,C1-C12-氟代烷硫基或C1-C12-氟烷氧基,
Hal分别是溴,氯或氟,
特征在于:
●在步骤A1)中,式(II)的化合物转化为式(III)的重氮盐;
其中,
p是0,1,2或3,
R3分别是氟,氯,溴,碘,氰基,氰硫基,羟基磺酰基或它们的碱金属盐,硝基,C1-C12-烷基,C1-C12-氟烷基,C1-C12-氟烷氧基,C1-C12-氟代烷硫基,C1-C12-烷氧基,C1-C12-烷氧基羰基,二(C1-C12-烷基)氨基,C4-C14-芳基或C5-C15-芳烷基,
其中,An-是酸的阴离子,
●在步骤A2)中,
式(III)重氮盐与式(IV)化合物在碱的存在下反应,得到式(V)的化合物;
其中,
m,n,Hal和R2分别按式(I)中定义,,
●在步骤B)中,用还原试剂,使式(V)化合物转化为式(I)化合物,其中,R1是氢;
●任选地,在步骤C)中,这些化合物通过O-烷基化,转化成式(I)的化合物,其中,R1是C1-C12-烷基。
2.如权利要求1所述的方法,其特征在于:制备4-氨基-2,3-二氟苯酚,4-氨基-2,5-二氟苯酚,4-氨基-2,6-二氟苯酚,4-氨基-2-氟苯酚,4-氨基-3-氯-5-氟苯酚,4-氨基-3-氯-2-氟苯酚,4-氨基-5-氯-2-氟苯酚,4-氨基-3-溴-5-氟苯酚,4-氨基-2-(三氟甲氧基)苯酚和4-氨基-3-(三氟甲氧基)苯酚。
5.式(I)的化合物,不包括:4-氨基-3,5-二氟苯酚,4-氨基-2,5-二氟苯酚,4-氨基-2,6-二氟苯酚,4-氨基-2-氯-6-氟苯酚,4-氨基-2-氯-3-氟苯酚,4-氨基-2-氯-5-氟苯酚,4-氨基-2-溴-5-氟苯酚,4-氨基-2-氟苯酚,4-氨基-3-氟苯酚,4-氨基-2-(三氟甲基)苯酚,4-氨基-5-氯-2-(三氟甲基)苯酚,4-氨基-2-氯-6-(三氟甲基)苯酚和4-氨基-3-(三氟甲基)-苯酚。
6.式(V)化合物,不包括:3,5-二氟-4-苯基偶氮苯酚,3-氟-4-苯基偶氮苯酚,3-氟-4-(4’-硝基苯基偶氮)苯酚,3-氟-4-(3’-硝基苯基偶氮)苯酚,3-氟-4-(4’-硫氰基苯基偶氮)苯酚,3-氟-4-(4’-硫代苯基偶氮)苯酚,4-(2’-氟-4’-羟基苯基偶氮)苯甲酸乙酯,2-氟-4-(4’-氟苯基偶氮)苯酚,2-氟-4-(3’-氟苯基偶氮)苯酚,2-氟-4-(4’-硫代苯基偶氮)苯酚,4-(3’-氟-4’-羟基苯基偶氮)苯甲酸乙酯,2,3-二氟-4-(4’-碘代苯基偶氮)苯酚,2,3-二氟-4(4’-硫代苯基偶氮)苯酚和2,6-二氟-4-(2’-溴代苯基偶氮)苯酚,3-(三氟甲基)-4-(苯基偶氮)苯酚和3-(三氟甲基)-4-(4’-磺酸钠苯基偶氮)苯酚。
7.权利要求5和6所述的化合物,或权利要求1-4所述方法制备的化合物在制备药物和农用化肥的活性组分或其中间体方法中的应用。
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DE10341533.5 | 2003-09-09 | ||
DE10341533A DE10341533A1 (de) | 2003-09-09 | 2003-09-09 | Verfahren zur Herstellung von halogenhaltigen 4-Aminophenolen |
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US (2) | US7358397B2 (zh) |
EP (1) | EP1514865A1 (zh) |
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CN102030616A (zh) * | 2010-09-17 | 2011-04-27 | 上海赫腾精细化工有限公司 | 2,3,5,6-四氟对苯二酚的制备方法 |
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EP1879875A1 (en) * | 2005-04-22 | 2008-01-23 | Wyeth | Crystal forms opf {[(2r)-7-(2,6-dichlorophenyl)-5-fluoro-2,3-dihydro-1-benzofuran-2-yl]methyl}amine hydrochloride |
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NL287513A (zh) * | 1962-01-09 | |||
JPS503372B1 (zh) * | 1963-05-04 | 1975-02-04 | ||
US3794734A (en) * | 1971-03-03 | 1974-02-26 | Merck & Co Inc | Methods of treating edema and hypertension using certain 2-aminoethylphenols |
JPS61126055A (ja) * | 1984-11-24 | 1986-06-13 | Nippon Soda Co Ltd | トリフルオロメチル基を有する4−アミノフエノ−ル類及びその製造方法 |
US4851535A (en) | 1985-01-23 | 1989-07-25 | Toyama Chemical Co., Ltd. | Nicotinic acid derivatives |
ES2051770T3 (es) * | 1986-02-28 | 1994-07-01 | Ciba Geigy Ag | N-benzoil-n'-fenilureas, su obtencion y empleo en el control de parasitos. |
DE3804288A1 (de) * | 1987-06-03 | 1988-12-15 | Bayer Ag | Substituierte aminophenyl-carbamate |
JPH0713045B2 (ja) | 1987-06-10 | 1995-02-15 | 財団法人相模中央化学研究所 | 2.5−ジフルオロフェノ−ル誘導体 |
DE3827133A1 (de) * | 1987-08-13 | 1989-02-23 | Ciba Geigy Ag | N-benzoyl-n'-2,3,5-trihalogen-4-halogenalkoxy-phenylharnstoffe, ihre herstellung und verwendung bei der kontrolle von schaedlingen |
US5068436A (en) * | 1989-03-10 | 1991-11-26 | E. I. Du Pont De Nemours And Company | Hydrogenation of halonitrobenzenes without dehalogenation |
DE4012791A1 (de) * | 1989-09-02 | 1991-03-07 | Bayer Ag | Carbocyclische anilid-carbamate |
DE4119919A1 (de) * | 1990-06-20 | 1992-01-02 | Ciba Geigy Ag | Benzoylphenylharnstoffe |
JPH05125030A (ja) * | 1991-11-06 | 1993-05-21 | Seiko Epson Corp | アゾベンゼン系化合物 |
US5622967A (en) * | 1993-04-26 | 1997-04-22 | Sterling Winthrop, Inc. | Quinolone carboxamide Calpain inhibitors |
DE19627424A1 (de) * | 1996-07-08 | 1998-01-15 | Bayer Ag | Verfahren zur Herstellung von 4-Hydroxyanilinen |
ES2184623B1 (es) | 2001-06-29 | 2004-09-16 | Centro De Investigaciones Energeticas, Medioambientales Y Tecnologicas (C.I.E.M.A.T.) | Piel artificial autologa secretora de leptina y metodo de obtencion. |
GB0117506D0 (en) * | 2001-07-18 | 2001-09-12 | Bayer Ag | Imidazopyridinones |
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US7208559B2 (en) * | 2002-12-27 | 2007-04-24 | Mitsui Chemicals, Inc. | Ethylened polymer and molded object obtained therefrom |
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CN102030616A (zh) * | 2010-09-17 | 2011-04-27 | 上海赫腾精细化工有限公司 | 2,3,5,6-四氟对苯二酚的制备方法 |
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US20080139795A1 (en) | 2008-06-12 |
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