CN1827580A - 3-二氟甲氧基-2,4,5-三氟苯甲酸合成工艺 - Google Patents
3-二氟甲氧基-2,4,5-三氟苯甲酸合成工艺 Download PDFInfo
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- CN1827580A CN1827580A CN 200510037884 CN200510037884A CN1827580A CN 1827580 A CN1827580 A CN 1827580A CN 200510037884 CN200510037884 CN 200510037884 CN 200510037884 A CN200510037884 A CN 200510037884A CN 1827580 A CN1827580 A CN 1827580A
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- difluoromethoxy
- trifluorobenzoic acid
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- benzoic acid
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- 238000000034 method Methods 0.000 title claims abstract description 15
- 230000015572 biosynthetic process Effects 0.000 title claims abstract description 13
- 238000003786 synthesis reaction Methods 0.000 title claims abstract description 13
- XKNIFQLRUBLKKI-UHFFFAOYSA-N 3-(difluoromethoxy)-2,4,5-trifluorobenzoic acid Chemical compound OC(=O)C1=CC(F)=C(F)C(OC(F)F)=C1F XKNIFQLRUBLKKI-UHFFFAOYSA-N 0.000 title abstract description 12
- 239000002994 raw material Substances 0.000 claims abstract description 10
- 238000006460 hydrolysis reaction Methods 0.000 claims abstract description 5
- 239000005711 Benzoic acid Substances 0.000 claims description 7
- XNGIFLGASWRNHJ-UHFFFAOYSA-L phthalate(2-) Chemical compound [O-]C(=O)C1=CC=CC=C1C([O-])=O XNGIFLGASWRNHJ-UHFFFAOYSA-L 0.000 claims description 4
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 4
- 230000000640 hydroxylating effect Effects 0.000 claims description 3
- HZONSAXHYJWPOM-UHFFFAOYSA-N C(OC1=C(C(=C(C(=C1F)F)F)F)C(=O)O)F Chemical compound C(OC1=C(C(=C(C(=C1F)F)F)F)C(=O)O)F HZONSAXHYJWPOM-UHFFFAOYSA-N 0.000 claims 1
- 230000032050 esterification Effects 0.000 abstract description 2
- 238000005886 esterification reaction Methods 0.000 abstract description 2
- 238000006467 substitution reaction Methods 0.000 abstract description 2
- 238000001308 synthesis method Methods 0.000 abstract 2
- YJLVXRPNNDKMMO-UHFFFAOYSA-N 3,4,5,6-tetrafluorophthalic acid Chemical compound OC(=O)C1=C(F)C(F)=C(F)C(F)=C1C(O)=O YJLVXRPNNDKMMO-UHFFFAOYSA-N 0.000 abstract 1
- 230000033444 hydroxylation Effects 0.000 abstract 1
- 238000005805 hydroxylation reaction Methods 0.000 abstract 1
- 230000002194 synthesizing effect Effects 0.000 abstract 1
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 12
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 7
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 5
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- OGOBINRVCUWLGN-UHFFFAOYSA-N 3-(trifluoromethyl)benzonitrile Chemical compound FC(F)(F)C1=CC=CC(C#N)=C1 OGOBINRVCUWLGN-UHFFFAOYSA-N 0.000 description 3
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 3
- 230000006837 decompression Effects 0.000 description 3
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- 229960000583 acetic acid Drugs 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 150000007942 carboxylates Chemical class 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 239000012362 glacial acetic acid Substances 0.000 description 2
- DCKVNWZUADLDEH-UHFFFAOYSA-N sec-butyl acetate Chemical compound CCC(C)OC(C)=O DCKVNWZUADLDEH-UHFFFAOYSA-N 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- XDTMQSROBMDMFD-UHFFFAOYSA-N Cyclohexane Chemical compound C1CCCCC1 XDTMQSROBMDMFD-UHFFFAOYSA-N 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- JVTAAEKCZFNVCJ-UHFFFAOYSA-M Lactate Chemical compound CC(O)C([O-])=O JVTAAEKCZFNVCJ-UHFFFAOYSA-M 0.000 description 1
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical class [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 238000005352 clarification Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 229960000935 dehydrated alcohol Drugs 0.000 description 1
- 238000003810 ethyl acetate extraction Methods 0.000 description 1
- XYIBRDXRRQCHLP-UHFFFAOYSA-N ethyl acetoacetate Chemical compound CCOC(=O)CC(C)=O XYIBRDXRRQCHLP-UHFFFAOYSA-N 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- -1 oily matter Substances 0.000 description 1
- 150000007660 quinolones Chemical class 0.000 description 1
- 238000010025 steaming Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
本发明涉及一种3-二氟甲氧基-2,4,5-三氟苯甲酸的合成工艺,特别涉及以四氟邻苯二甲酸为原料,经羟基化、酯化、取代和水解反应制备3-二氟甲氧基-2,4,5-三氟苯甲酸的工艺方法。3-二氟甲氧基-2,4,5-三氟苯甲酸合成方法国外有2种,国内没有。现有的2种合成方法所采用的起始原料价格昂贵、收率低、成本高,本发明提供的合成3-二氟甲氧基-2,4,5-三氟苯甲酸的工艺成本低、收率高,同时生产的产品含量纯度高。
Description
技术领域
3-二氟甲氧基-2,4,5-三氟苯甲酸(FFBA)合成工艺属于生物医药领域,3-二氟甲氧基-2,4,5-三氟苯甲酸(FFBA)是新型的喹诺酮类第四代抗菌剂乳酸卡德沙星的主要中间体。
背景技术
3-二氟甲氧基-2,4,5-三氟苯甲酸(FFBA)合成工艺国外有2种。第1种合成工艺采用3-羟基-2,4,5-三氟苯甲酸丁酯为起始原料,该原料与CH2Cl2-H2O在KOH和Bu4NBr存在的条件下生成3-二氟甲氧基-2,4,5-三氟苯甲酸丁酯,经水解得到3-二氟甲氧基-2,4,5-三氟苯甲酸;第2种合成工艺采用3-二氟甲氧基-2,4,5-三氟苯甲酸乙酯为起始原料,该原料水解得到3-二氟甲氧基-2,4,5-三氟苯甲酸;上述两种合成工艺所采用的起始原料价格昂贵,同时收率只有50%左右。国内无任何3-二氟甲氧基-2,4,5-三氟苯甲酸合成工艺报道。
发明内容
本发明的目的在于克服国外两种3-二氟甲氧基-2,4,5-三氟苯甲酸合成工艺所采用的起始原料价格昂贵和收率低的缺陷,提供一种新的3-二氟甲氧基-2,4,5-三氟苯甲酸合成工艺。
本发明采取的技术方案为以四氟邻苯二甲酸为起始原料,通过羟基化反应生成3-羟基-2,4,5-三氟苯甲酸,再经过酯化、取代和水解反应制得3-二氟甲氧基-2,4,5-三氟苯甲酸。
本发明的优点在于采用价格低廉的四氟邻苯二甲酸为起始原料,大大降低了生产成本,同时使收率提高到75%。
具体实施方式
1、羟基化反应:
向反应釜中加入氢氧化钾、水和四氟邻苯二甲酸,升温反应4小时后,冷却,将反应液抽至搪玻璃反应釜中,加入盐酸常压反应3小时后冷却,分液,干燥,得羟基物。
2、酯化反应:
向反应釜中加入羟基物,无水乙醇和硫酸少量,回流反应30分钟后冷却,加入环已烷,分水18小时,用乙酸乙酯萃取,用饱和小苏打溶液洗涤至中性,减压蒸出乙酸乙酯,冷却得酯化物。
3、取代反应:
向反应釜中加入氢氧化钾溶液、二氯甲烷和酯化物,于8℃以下通入F22至反应液澄清,过滤,加入磷酸洗涤后加入甲苯萃取,减压蒸出甲苯后得油状物。
4、水解反应:
向反应釜中加入冰醋酸、硫酸、油状物、水,然后回流6小时,减压蒸出冰醋酸,用甲苯萃取,分出硫酸层,干燥,然后减压蒸出甲苯溶剂,得成品3-二氟甲氧基-2,4,5-三氟苯甲酸(FFBA)。
Claims (1)
1、3-二氟甲氧基-2,4,5-三氟苯甲酸合成工艺其特征在于以四氟邻苯二甲酸为起始原料,通过羟基化反应生成3-羟基-2,4,5-三氟苯甲酸,再经过酯化、取代和水解反应得到3-二氟甲氧基-2,4,5-三氟苯甲酸。
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101565343B (zh) * | 2009-05-14 | 2013-02-20 | 浙江永太科技股份有限公司 | 二氟甲氧桥键化合物制备方法 |
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- 2005-02-28 CN CN 200510037884 patent/CN1827580A/zh active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101565343B (zh) * | 2009-05-14 | 2013-02-20 | 浙江永太科技股份有限公司 | 二氟甲氧桥键化合物制备方法 |
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