CN106496015B - A kind of preparation method of Flurbiprofen - Google Patents

A kind of preparation method of Flurbiprofen Download PDF

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CN106496015B
CN106496015B CN201610934843.8A CN201610934843A CN106496015B CN 106496015 B CN106496015 B CN 106496015B CN 201610934843 A CN201610934843 A CN 201610934843A CN 106496015 B CN106496015 B CN 106496015B
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fluoro
flurbiprofen
preparation
acid
chlorphenyl
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CN106496015A (en
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岳刚
王志强
黄印全
禹凯
关登仕
符永冠
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Hebei Maison Chemical Co Ltd
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    • C07ORGANIC CHEMISTRY
    • C07CACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C51/00Preparation of carboxylic acids or their salts, halides or anhydrides
    • C07C51/347Preparation of carboxylic acids or their salts, halides or anhydrides by reactions not involving formation of carboxyl groups
    • C07C51/353Preparation of carboxylic acids or their salts, halides or anhydrides by reactions not involving formation of carboxyl groups by isomerisation; by change of size of the carbon skeleton
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07FACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
    • C07F3/00Compounds containing elements of Groups 2 or 12 of the Periodic Table
    • C07F3/02Magnesium compounds

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Abstract

A kind of preparation method of Flurbiprofen, belong to the technical field of medicine preparation, using Suzuki coupling reaction, in the presence of a base by 2- (the fluoro- 4- chlorphenyl of 3-) propionic acid and phenyl borane reagent, in organic solvent, by the Suzuki coupling reaction of palladium chtalyst, Flurbiprofen is obtained, wherein the molar ratio of 2- (the fluoro- 4- chlorphenyl of 3-) propionic acid and phenyl borane reagent is 1:(0.9-1.1).Preparation method of the present invention is simple, and gained Flurbiprofen yield is high, with high purity.

Description

A kind of preparation method of Flurbiprofen
Technical field
The invention belongs to the technical fields of medicine preparation, are related to the preparation of Non-steroidanalgetic drug, and in particular to one The preparation method of kind Flurbiprofen, preparation method of the present invention is simple, and gained Flurbiprofen yield is high, with high purity.
Background technique
Flurbiprofen 1 (Flurbiprofen), entitled 2- (the 2- fluorine biphenyl -4- base) propionic acid of chemistry, the entitled 2- (2- of English fluoro-4-biphenylyl)propionicacid.Its structure is as shown below:
Flurbiprofen is a kind of non-steroidal anti-inflammatory analgesics of Bu Zi company, Britain exploitation.The medicine is in 1976 in Britain City is a kind of potent phenylpropionic acid antipyretic and anti-inflammatory antalgesic, prostaglandin can be inhibited to prepare cyclooxygenase and rise analgesic, it is anti-inflammatory and Refrigeration function.Its anti-inflammatory and analgesic activity are respectively 250 times and 50 times of aspirin (also known as acetylsalicylic acid).It is mainly used for Rheumatic arthritis, rheumatoid arthritis, ankylosing spondylitis, degenerative arthritis.After can also preventing surgical lens removal The mottled oedema of aphacia capsule sample occurs, after inhibiting pupil contraction in operation, cataract and trabeculoplasty argon laser to perform the operation The treatment of ocular inflamation.Apply also for some other reason pain as caused by wound, strain, operation etc..
Flurbiprofen axetil is developed jointly by Japanese Kaken Pharmaceufical Co., Ltd. and green cross Pharmaceutical Co., Ltd, 1992 Year lists in Japan, and 2004 in Discussion on Chinese Listed.It is separated and is studied according to the chiral structure in Flurbiprofen and developed Drug Esflurbiprofen, i.e. (S)+Flurbiprofen.The further exploitation that they are carried out using Flurbiprofen as raw material.
Flurbiprofen itself is that drug and some prodrugs and improved basis, tool play a very important role.Existing system The method of standby Flurbiprofen mainly has following approach:
1. the fluoro- 4- bromaniline of 2- passes through diazo-reaction, then is coupled under alkalinity with benzene and obtains the fluoro- 4- bromo biphenyl of 2-, so It reacts to obtain Flurbiprofen, gross production rate about 48% again with 2 bromopropionic acid sodium by Grignard Reagent preparation afterwards;
2. the fluoro- 4- bromo-iodobenzene of 2- is by Suzuki coupling reaction with phenyl boric acid, using Grignard Reagent preparation again with 2- Bromo-propionic acid sodium reacts to obtain Flurbiprofen, gross production rate about 55%;
3. diazonium salt is made by diazo-reaction in 2- (the fluoro- 4- aminophenyl of 3-) propionic acid, alkalinity is lower to be coupled to obtain with benzene Flurbiprofen, gross production rate about 50%.
Wherein, method 1,3 uses the biggish diazo-reaction of wastewater flow rate, and much excessive and severe toxicity benzene, to ring Border and operator's harm are huge;Method 2 uses efficient Suzuki coupling reaction, but the sequence of constructing arranged causes to need Using the expensive fluoro- 4- bromo-iodobenzene of 2-, and before the Suzuki for using noble metal catalyst reaction is arranged in, cost mistake is caused Height, and low yield.
Summary of the invention
The present invention is to solve the drawbacks described above of the prior art, provides a kind of preparation route of Flurbiprofen, environmentally protective, Healthy and safe, yield is high, consumes low, Flurbiprofen purity is high.
The present invention be realize its purpose the technical solution adopted is that:
A kind of preparation method of Flurbiprofen, using Suzuki coupling reaction, by 2- (the fluoro- 4- chlorphenyl of 3-) propionic acid and benzene Base borane reagent in the presence of a base, in organic solvent, by the Suzuki coupling reaction of palladium chtalyst, obtains fluorine and compares Lip river Sweet smell, wherein the molar ratio of 2- (the fluoro- 4- chlorphenyl of 3-) propionic acid and phenyl borane reagent is 1:(0.9-1.1).
The preparation of 2- (the fluoro- 4- chlorphenyl of 3-) propionic acid is the following steps are included: using the fluoro- 4- chloro-bromobenzene of 3- as raw material, first by 3- Fluoro- 4- chloro-bromobenzene is prepared into Grignard Reagent, then carries out coupling reaction with 2 bromopropionic acid sodium, then acidified obtain 2- (the fluoro- 4- of 3- Chlorphenyl) propionic acid, wherein the molar ratio of the fluoro- 4- chloro-bromobenzene of 3- and 2 bromopropionic acid sodium is 1:(1-2).It is added in coupling reaction process Magnesium chips, 3- fluoro- 4- chloro-bromobenzene, magnesium chips, 2 bromopropionic acid sodium molar ratio be 1:(1-2): (1-2).
The temperature of Grignard Reagent and 2 bromopropionic acid sodium coupling reaction is -10~70 DEG C.
The solvent of coupling reaction is tetrahydrofuran, ether, cyclopentyl methyl ether, glycol dimethyl ether, methyl tertiary butyl ether(MTBE), just Butyl ether, toluene, combination one or more of in dimethylbenzene.
Phenyl borane reagent is phenyl boric acid, phenyl boric acid glycol ester, phenyl boric acid -1,3- propylene glycol ester, phenyl boric acid neopentyl glycol Ester, phenyl boric acid pinacol ester, triphenylboroxin, combination one or more of in phenyl trifluoromethanesulfonate potassium borate.
Organic solvent is ethyl alcohol, toluene, tetrahydrofuran, dimethylformamide, dioxane, a kind of in glycol dimethyl ether Or several combination.
Palladium catalyst is used in the Suzuki coupling reaction of palladium chtalyst, is PdCl2(dtbpf)、PdCl2(Amphos)2、Pd (Pt-Bu3)2、Pd(Amphos)2One or more of combination.
The molar ratio of 2- (the fluoro- 4- chlorphenyl of 3-) propionic acid and palladium catalyst is 1:(0.00005-0.005).
The alkali is selected from potassium carbonate, saleratus, sodium carbonate, sodium bicarbonate, potassium fluoride, triethylamine, sodium acetate, acetic acid The combination of one or more of potassium, lithium hydroxide, cesium carbonate.
The molar ratio of 2- (the fluoro- 4- chlorphenyl of 3-) propionic acid and alkali is 1:(1-3).
The beneficial effects of the present invention are:
Safety and environment are caused using a large amount of benzene 1. avoiding conventional method and preparing in the fluoro- 4- bromo biphenyl of intermediate 2- The problem of pollution;
2. preparation route is succinct, every step yield is higher, pass through creative arrangement reaction sequence, and the strictly handle to details Control, palladium catalyst dosage substantially reduce, catalyst cost are reduced to the level also lower than solvent expense, can sufficiently control life Cost is produced, and the high conversion rate realized, wastage in bulk or weight are low;
3. raw material is easy to get, acquisition can be commercialized;
4. process route is environmentally protective, easy to operate, yield is high, and atom utilization is high, and solvent usage is small, and the three wastes are few, produces It can be big.
5, Flurbiprofen gross production rate prepared by the present invention is greater than 99.5% up to 73% or more, HPLC purity.
Specific embodiment
The present invention, which uses for the Grignard Reagent of the fluoro- 4- chloro-bromobenzene of 3- and 2 bromopropionic acid sodium to be coupled, is acidified to obtain 2- again that (3- is fluoro- 4- chlorphenyl) propionic acid;2- (the fluoro- 4- chlorphenyl of 3-) propionic acid compares Lip river using reacting to obtain fluorine with the Suzuki of phenyl borane reagent It is fragrant.This method raw material is easy to get and simply, efficiently, is suitble to industrialized production.Preparation route is as follows: wherein phenyl borane reagent 5 For phenyl boric acid, phenyl boric acid glycol ester, phenyl boric acid -1,3- propylene glycol ester, phenyl boric acid neopentyl glycol ester, phenyl boric acid pinacol ester, One or more of combination in triphenylboroxin, phenyl trifluoromethanesulfonate potassium borate;
The present invention is further illustrated combined with specific embodiments below.
Embodiment 1
A, 2- (the fluoro- 4- chlorphenyl of 3-) propionic acid (4) is prepared
In 1000ml dry four-hole bottle, 14.4g (0.6mol) magnesium chips, 50mlTHF, two iodine grains, nitrogen atmosphere is added 50 DEG C are heated with stirring in enclosing.The solution that the fluoro- 4- chloro-bromobenzene (2) of 105g (0.5mol) 3- is dissolved in 370mlTHF is instilled into 20ml, After initiation to be confirmed and reacting balance, maintains 50~60 DEG C to instill remaining solution, drip off rear insulated and stirred 1h.
Reaction solution is cooled to 0 DEG C, no more than 10 DEG C at a temperature of, be added 96.3g (0.55mol) 2 bromopropionic acid sodium (3), back flow reaction 1h is gradually heated up after adding, reaction terminates.
Reaction solution is cooled to 0 DEG C, is slowly added into 5mol/L hydrochloric acid 400ml, temperature is no more than 20 DEG C, stirs naturally after adding 30min is mixed, 50 DEG C of stirring 1h are again heated to.
Liquid separation, organic phase retain, and water phase is extracted twice, and use ethyl acetate 200ml every time.Merge organic phase and extract liquor, Water-bath decompression is lower to steam solvent, steams to there is solid appearance, 300ml toluene is added, and stirring is cooled to -10 DEG C, and resulting white is solid Body filters drying, obtains product 85g, yield 84%, and HPLC measures purity and is greater than 99.5%.
B, 2- (the fluoro- biphenyl -4- base of 2-) propionic acid --- Flurbiprofen (1) is prepared
In 1000ml there-necked flask, product 2- (the fluoro- 4- chlorphenyl of 3-) propionic acid (4) is walked in addition) 85g (0.42mol), benzene Boric acid (5) 53.7g (0.44mol), ethyl alcohol 200ml, toluene 300ml, potassium carbonate 121g (0.88mol) are dissolved in the molten of 200ml water Liquid.PdCl is added under nitrogen protection after mixing evenly2(Amphos)294mg (0.03mol%).It is heated to back flow reaction 4h, TLC is displayed without raw material (4) residue, and reaction terminates.
Solvent is steamed, is cooled to 0 DEG C, is filtered.The solid of generation is washed with 200ml cold water.Then solid is dissolved in In hot water, hydrochloric acid is added dropwise to pH value less than 3, a large amount of solids are precipitated, filter drying at room temperature, obtains the flurbiprofen product of white 89.2g, yield 87%, HPLC measure purity 99.57%.
Flurbiprofen gross production rate 73.1%.
Embodiment 2
Prepare 2- (the fluoro- biphenyl -4- base of 2-) propionic acid --- Flurbiprofen (1)
In 1000ml there-necked flask, A step operation product 2- (the fluoro- 4- chlorphenyl of 3-) propionic acid (4) 85g in embodiment 1 is added (0.42mol), phenyl boric acid pinacol ester (5) 89.7g (0.44mol), ethyl alcohol 200ml, toluene 300ml, potassium carbonate 121g (0.88mol) is dissolved in the solution of 200ml water.PdCl is added under nitrogen protection after mixing evenly2(Amphos)2155mg (dosage 0.05mol%).It is heated to back flow reaction 4h, TLC shows no raw material (4), and reaction terminates.
Solvent is steamed, is cooled to 0 DEG C, is filtered.The solid of generation is washed with 200ml cold water.Then solid is dissolved in In hot water, hydrochloric acid is added dropwise to pH value less than 3, a large amount of solids are precipitated, filter drying at room temperature, obtains the Flurbiprofen (1) of white 95.5g, yield 89%, HPLC measure purity 99.58%.
Flurbiprofen gross production rate 74.8%.
Embodiment 3
A, 2- (the fluoro- 4- chlorphenyl of 3-) propionic acid (4) is prepared
In 1000ml dry four-hole bottle, 14.4g (0.6mol) magnesium chips, 50mlTHF, two iodine grains, nitrogen atmosphere is added 50 DEG C are heated with stirring in enclosing.The solution that the fluoro- 4- chloro-bromobenzene (2) of 105g (0.5mol) 3- is dissolved in 370mlTHF is instilled into 20ml, After initiation to be confirmed and reacting balance, maintains 50~60 DEG C to instill remaining solution, drip off rear insulated and stirred 1h.
Reaction solution is cooled to 0 DEG C, no more than 10 DEG C at a temperature of, be added 105g (0.6mol) 2 bromopropionic acid sodium (3), 50~60 DEG C of reaction 2h of maintenance are gradually heated up after adding, reaction terminates.
Reaction solution is cooled to 0 DEG C, is slowly added into 5mol/L hydrochloric acid 400ml, temperature is no more than 20 DEG C, stirs naturally after adding 30min is mixed, 50 DEG C of stirring 1h are again heated to.
Liquid separation, organic phase retain, and water phase is extracted twice, and use ethyl acetate 200ml every time.Merge organic phase and extract liquor, Water-bath decompression is lower to steam solvent, steams to there is solid appearance, 300ml toluene is added, and stirring is cooled to -10 DEG C, and resulting white is solid Body filters drying, obtains product 87g, yield 86%.
B, 2- (the fluoro- biphenyl -4- base of 2-) propionic acid --- Flurbiprofen (1) is prepared
In 1000ml there-necked flask, product 2- (the fluoro- 4- chlorphenyl of 3-) propionic acid (4) 85g that step A is obtained is added (0.42mol), phenyl boric acid pinacol ester (5) 89.7g (0.44mol), ethyl alcohol 200ml, toluene 300ml, potassium carbonate 121g (0.88mol) is dissolved in the solution of 200ml water.PdCl is added under nitrogen protection after mixing evenly2(Amphos)2155mg (dosage 0.05mol%).It is heated to back flow reaction 4h, TLC shows no raw material (4), and reaction terminates.
Solvent is steamed, is cooled to 0 DEG C, is filtered.The solid of generation is washed with 200ml cold water.Then solid is dissolved in In hot water, hydrochloric acid is added dropwise to pH value less than 3, a large amount of solids are precipitated, filter drying at room temperature, obtains the Flurbiprofen (1) of white 95.5g yield 89%, HPLC measures purity 99.53%.
Flurbiprofen gross production rate 76.5%.
Embodiment 4:
A, 2- (the fluoro- 4- chlorphenyl of 3-) propionic acid (4) is prepared
In 1000ml dry four-hole bottle, 14.4g (0.6mol) magnesium chips, 50mlTHF, two iodine grains, nitrogen atmosphere is added 50 DEG C are heated with stirring in enclosing.The solution that the fluoro- 4- chloro-bromobenzene (2) of 105g (0.5mol) 3- is dissolved in 370mlTHF is instilled into 20ml, After initiation to be confirmed and reacting balance, maintains 50~60 DEG C to instill remaining solution, drip off rear insulated and stirred 1h.
Reaction solution is cooled to 0 DEG C, no more than 10 DEG C at a temperature of, be added 105g (0.6mol) 2 bromopropionic acid sodium (3), Back flow reaction 1h is gradually heated up after adding, reaction terminates.
Reaction solution is cooled to 0 DEG C, is slowly added into 5mol/L hydrochloric acid 400ml, temperature is no more than 20 DEG C, stirs naturally after adding 30min is mixed, 50 DEG C of stirring 1h are again heated to.
Liquid separation, organic phase retain, and water phase is extracted twice, and use ethyl acetate 200ml every time.Merge organic phase and extract liquor, Water-bath decompression is lower to steam solvent, steams to there is solid appearance, 300ml toluene is added, and stirring is cooled to -10 DEG C, and resulting white is solid Body filters drying, obtains product 89g, yield 88%.
B, 2- (the fluoro- biphenyl -4- base of 2-) propionic acid --- Flurbiprofen (1) is prepared
In 1000ml there-necked flask, 2- (the fluoro- 4- chlorphenyl of 3-) propionic acid (4) 85g (0.42mol), phenyl boric acid (5) is added 53.7g (0.44mol), ethyl alcohol 200ml, toluene 300ml, potassium carbonate 121g (0.88mol) are dissolved in the solution of 200ml water.Stirring Pd (Pt-Bu is added under nitrogen protection after uniformly3)290mg (dosage 0.04mol%).It is heated to back flow reaction 4h, TLC is shown Without raw material (4), reaction terminates.
Solvent is steamed, is cooled to 0 DEG C, is filtered.The solid of generation is washed with 200ml cold water.Then solid is dissolved in In hot water, hydrochloric acid is added dropwise to pH value less than 3, a large amount of solids are precipitated, filter drying at room temperature, obtains the Flurbiprofen (1) of white 96.6g, yield 90%, HPLC measure purity 99.6%.
Flurbiprofen gross production rate 79.2%.

Claims (7)

1. a kind of preparation method of Flurbiprofen, using Suzuki coupling reaction, it is characterised in that: by 2- (the fluoro- 4- chlorobenzene of 3- Base) propionic acid and phenyl borane reagent in the presence of a base, in organic solvent, by the Suzuki coupling reaction of palladium chtalyst, Flurbiprofen is obtained, wherein the molar ratio of 2- (the fluoro- 4- chlorphenyl of 3-) propionic acid and phenyl borane reagent is 1:(0.9-1.1), palladium is urged Palladium catalyst is used in the Suzuki coupling reaction of change, is PdCl2(dtbpf)、PdCl2(Amphos)2、Pd(Pt-Bu3)2、Pd (Amphos)2One or more of combination, the molar ratio of 2- (the fluoro- 4- chlorphenyl of 3-) propionic acid and palladium catalyst is 1: (0.00005-0.0004);The preparation of 2- (the fluoro- 4- chlorphenyl of 3-) propionic acid is the following steps are included: be original with the fluoro- 4- chloro-bromobenzene of 3- Material, is first prepared into Grignard Reagent for the fluoro- 4- chloro-bromobenzene of 3-, then carries out coupling reaction with 2 bromopropionic acid sodium, then acidified obtain 2- (the fluoro- 4- chlorphenyl of 3-) propionic acid, wherein the molar ratio of the fluoro- 4- chloro-bromobenzene of 3- and 2 bromopropionic acid sodium is 1:(1-2).
2. a kind of preparation method of Flurbiprofen according to claim 1, it is characterised in that: Grignard Reagent and 2 bromopropionic acid The temperature of sodium coupling reaction is -10~70 DEG C.
3. a kind of preparation method of Flurbiprofen according to claim 1, it is characterised in that: the solvent of coupling reaction is four It is hydrogen furans, ether, cyclopentyl methyl ether, glycol dimethyl ether, methyl tertiary butyl ether(MTBE), n-butyl ether, toluene, a kind of or several in dimethylbenzene The combination of kind.
4. a kind of preparation method of Flurbiprofen according to claim 1, it is characterised in that: phenyl borane reagent is benzene boron Acid, phenyl boric acid glycol ester, phenyl boric acid -1,3- propylene glycol ester, phenyl boric acid neopentyl glycol ester, phenyl boric acid pinacol ester, phenyl boric acid One or more of combination in acid anhydride, phenyl trifluoromethanesulfonate potassium borate.
5. a kind of preparation method of Flurbiprofen according to claim 1, it is characterised in that: organic solvent is ethyl alcohol, first Benzene, tetrahydrofuran, dimethylformamide, dioxane, combination one or more of in glycol dimethyl ether.
6. a kind of preparation method of Flurbiprofen according to claim 1, it is characterised in that: the alkali is selected from carbonic acid Potassium, saleratus, sodium carbonate, sodium bicarbonate, potassium fluoride, triethylamine, sodium acetate, potassium acetate, lithium hydroxide, one in cesium carbonate Kind or several combinations.
7. a kind of preparation method of Flurbiprofen according to claim 1, it is characterised in that: 2- (the fluoro- 4- chlorphenyl of 3-) The molar ratio of propionic acid and alkali is 1:(1-3).
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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103012144A (en) * 2012-12-26 2013-04-03 哈药集团技术中心 Preparation method of flurbiprofen axetil
CN104649906A (en) * 2015-01-10 2015-05-27 山东威高药业股份有限公司 Preparation method of flurbiprofen axetil

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103012144A (en) * 2012-12-26 2013-04-03 哈药集团技术中心 Preparation method of flurbiprofen axetil
CN104649906A (en) * 2015-01-10 2015-05-27 山东威高药业股份有限公司 Preparation method of flurbiprofen axetil

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Chinese Chemical Letters;Lu Gang et al;《Chinese Chemical Letters》;20061231;第17卷(第4期);第461-464页

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