CN1102137C - Method for splitting ibuprofen by two-component chiral reagent - Google Patents
Method for splitting ibuprofen by two-component chiral reagent Download PDFInfo
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- CN1102137C CN1102137C CN00114429A CN00114429A CN1102137C CN 1102137 C CN1102137 C CN 1102137C CN 00114429 A CN00114429 A CN 00114429A CN 00114429 A CN00114429 A CN 00114429A CN 1102137 C CN1102137 C CN 1102137C
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Abstract
The present invention discloses a method for disassembling ibuprofen racemic mixture by a two-component resolution agent. Racemic ibuprofen with ceramic amount and the two-component resolution agent which is 1 to 2 times of molar weight more than the racemic ibuprofen are heated to reflux by times. Diastereomer salt of (S)-(+)-ibuprofen is precipitated and separated. Crystals float on saturation Na2 CO3 solution, and a resolution agent is separated and recovered. Solution is acidified by 0.5 to 10% of hydrochloric acid, the (S)-(+)-ibuprofen is precipitated and separated, and is cleaned and dried, and thus, purity products are prepared. The optical rotation purity is 95 to 99%, and the one-time crystallization yield is about 40%. The present invention has the advantages of high split efficiency, simple and easy technology, high speed of crystal formation, short split period, disassembly completion in 1 to 7 hours, recovery and usability of resolution agent and solution, reduction of production cost, and increase of product market competitiveness.
Description
Technical field
The present invention relates to a kind of method for splitting of Ibuprofen BP/EP racemic mixture, the two component resolving agents of particularly a kind of usefulness split the method for Ibuprofen BP/EP raceme mixture.
Background technology
Ibuprofen BP/EP [Ibuprofen, 2-(4-ibuprofen), 2-(4-isobutylphenyl) propionic acid] is a kind of white crystalline powder, foreign odor is arranged, tasteless, water insoluble, be soluble in ethanol, chloroform or acetone, 75～77 ℃ of fusing points, its structural formula is:
Ibuprofen BP/EP is the important anti-inflammation and analgesic drugs of a class that comes out the sixties, it generally is with its racemic mixture administration, by means of its analgesia and anti-inflammatory character and be used for the treatment of rheumatism, but the pharmacologically active of two kinds of enantiomorphs of Ibuprofen BP/EP is not what equate, and wherein the physiologically active of (S)-(+)-configuration is 160 times of (R)-(-)-configuration.Yet in treatment, generally still use undivided mixture, be sought after a kind of simple method and obtain pure enantiomorph.
The acquisition of optically pure (S)-(+)-Ibuprofen BP/EP can be adopted fractionation and two kinds of methods of asymmetric synthesis of racemic modification.Owing to the reason of method of asymmetric synthesis at aspects such as cost and yields, be difficult to carry out suitability for industrialized production, therefore the racemic modification fractionation is the main method that obtains optical purity (S)-(+)-Ibuprofen BP/EP, usually adopt a pair of enantiomorph reaction in chiral selectors and the raceme mixture, make it to be converted into two kinds of diastereoisomeric salts, utilize the difference of these diastereomer physico-chemical properties then, it is restored after separately be (S)-(+)-Ibuprofen BP/EP.US-A-4209638 discloses people such as U.S. D.R.Patil and has adopted (S)-phenylethylamine to split the method for the racemic mixture of Ibuprofen BP/EP as resolving agent, it is the racemic mixture reaction with (S)-phenylethylamine and Ibuprofen BP/EP, form the diastereoisomeric salt of (S)-(+)-Ibuprofen BP/EP and R-(-)-Ibuprofen BP/EP, because (S)-(+)-solubleness of diastereoisomeric salt in the mixed solvent of aliphatic hydrocrbon or aliphatic hydrocrbon and aromatic substance of Ibuprofen BP/EP less than salt, thereby be precipitated out earlier, thereby separately with two kinds of salt, use the diastereoisomeric salt of diluted mineral acid acidifying (S)-(+)-Ibuprofen BP/EP again and obtain (S)-(+)-Ibuprofen BP/EP, its optical purity is 76%; People such as people such as U.S. D.G.Kaiser and T.Manimaran use the same method (S)-(+)-Ibuprofen BP/EP optical purity are brought up to 95% and 99%; And the human L-Methionins such as A.Bhattacharya of the U.S. are made resolution reagent, people such as R.D.Larsen make resolving agent with chiral alcohol, humans (-) such as the N.Hiroyuki-4-methyl-α-isopropyl benzene ethamine of Japan is made resolving agent, and using the same method has all obtained, and optical purity is at 50-90%.These class methods have all adopted traditional single-component resolution process, and the fractionation cycle generally needs 20-40 hour, the operating procedure complexity, and the production cost height is difficult to industrialization production.
Summary of the invention
The objective of the invention is to use two component resolving agents, utilize different process meanses to split Ibuprofen BP/EP, reach the technology that simplifies the operation, reduce production costs, improve the crystallization purity and the productive rate of disposable diastereoisomeric salt, to improve the fractionation efficient of (S)-(+)-Ibuprofen BP/EP, help making suitability for industrialized production.
For achieving the above object, the present invention adopts following technical scheme:
With a certain amount of racemize Ibuprofen BP/EP be suspended in after the A component resolving agent (being mainly chiral amino alcohol) of 0.5-1 times of molar weight mixes in the mixed solvent reflux 0.5-3 hour, then, the B component resolving agent (being mainly chiral aryl amine or amino acid) that adds 0.5-1 times of molar weight, refluxed again 0.5-2 hour, then resolving agent forms corresponding diastereoisomeric salt with (S)-(+)-Ibuprofen BP/EP and R-(-)-Ibuprofen BP/EP reaction respectively, wherein the diastereoisomeric salt of (S)-(+)-Ibuprofen BP/EP precipitates because of solubleness is less and separates out, after treating that this solution is cooled to room temperature, filter, drying precipitated, and, crystallization is suspended in saturated Na with behind the ethyl alcohol recrystallization
2CO
3In the solution, resolving agent precipitation in crystallization this moment is separated out, and (S)-(+)-Ibuprofen BP/EP in the crystallization exists in solution with the form of sodium salt, with this solution of hcl acidifying of 0.5-10% to pH value less than 5, then (S)-(+)-Ibuprofen BP/EP precipitation is separated out, promptly get pure product after cleaning, drying, its polarimetry purity is 95-99%, and the yield of primary crystallization is about 40%.If need, can resolving agent and the solvent in the reaction be reclaimed, R-(-)-Ibuprofen BP/EP in the raffinate and a spot of (S)-(+)-Ibuprofen BP/EP can be handled the back by racemization and handle with present technique again, to reduce the technology cost, improve the total recovery of (S)-(+)-Ibuprofen BP/EP.
Two component resolution reagents described in the above-mentioned reaction use total amount doubly as the 1-2 of Ibuprofen BP/EP molar weight, the order of addition(of ingredients) of A component resolving agent and B component resolving agent can exchange.Wherein the amino alcohol of A component mainly contains 1-p-nitrophenyl-2-amino-1, ammediol, 1-are to methylsulfonyl phenyl-2-amino-1, ammediol, 1-phenyl-2-amino-1, ammediol, 1-hydroxyl-2-methylamino-phenylpropyl alcohol alkane, norephedrine, norpseudoephedrine etc.; The chiral aryl amine of B component mainly contains α-Ben Yian, to methyl-α-Ben Yian, α-amphetamine, β-amphetamine etc., amino acid mainly contains p-hydroxybenzene Padil, Methionin etc.
Employed solvent normally adds a certain amount of polar solvent in the non-polar solvent in the above-mentioned reaction, and wherein the ratio of non-polar solvent and polar solvent is 1-10: 0.1-5.This type of non-polar solvent can be aliphatic series, cyclic aliphatic and aromatic hydrocarbon, for example sherwood oil cut (boiling range: 60-90 ℃), cyclohexane or the like, preferably a kind of rudimentary aliphatic alcohol of polar solvent, aliphatic amine are as methyl alcohol, ethanol, Virahol, Trimethylamine 99, triethylamine, tripropyl amine, tri-n-butylamine and various hydramine etc.
Major advantage of the present invention is to split the efficient height, simple for process, the formation crystallization velocity is fast, the fractionation cycle is short, generally can finish at 1-7 hour, resolving agent and solvent can reclaim use, and employed starting material are based on domestic fully, reduce production cost, increased the competitiveness of product in market.
Embodiment
With embodiment the present invention is further described below:
Embodiment 1
With 206.3 gram (1 mole) racemize Ibuprofen BP/EPs and 106.1 gram (0.5 mole) L-(+)-right-1-nitrophenyl-2-amino-1, ammediol was suspended in the mixed solvent of 580 milliliters of sherwood oils and Trimethylamine 99 (ratio 10: 1) reflux 2 hours, add then in addition-component resolving agent 60.6 gram (0.5 mole) 1-phenyl-ethyl amines refluxed 2 hours, made resolving agent and two kinds of corresponding diastereoisomeric salts of Ibuprofen BP/EPs reaction formation.The diastereoisomeric salt crystallization of very fast wherein (S)-(+)-Ibuprofen BP/EP is separated out, and makes solution be cooled to room temperature under agitation condition, and filtration is also drying precipitated, should precipitate with behind the analytical pure ethyl alcohol recrystallization, is suspended in the saturated Na of 100mL
2CO
3In the solution, separate, it is 2 that solution is acidified to pH value with 1% hydrochloric acid, thereby is settled out (S)-(+)-Ibuprofen BP/EP crystal, obtains polarimetry purity 98% after cleaning, the drying
+ 57.4 °) (S)-(+)-Ibuprofen BP/EP, disposable yield is 41.3% (85.2 gram) of initial racemoid.
Embodiment 2
With 206.3 gram (1 mole) racemize Ibuprofen BP/EPs and (-)-p-hydroxybenzene Padil (33.4 grams, 0.3 mole) be suspended in the mixed solvent of 1000 milliliters of hexanaphthenes and tri-n-butylamine (ratio 10: 1), with suspension reflux 2 hours, then with (-)-4-methyl-α-Ben Yian (135.2 grams, 1 mole) add solution for continuous and refluxed 2 hours, leave standstill and make this solution be cooled to room temperature, filter also drying precipitated, should precipitate and use the analytical pure ethyl alcohol recrystallization, then this crystal was suspended in saturated Na
2CO
3In the solution (80mL), reclaim resolving agent (-)-4-methyl-α-Ben Yian, it is 2 that solution is acidified to pH value with 1% hydrochloric acid, thereby is settled out its (S)-(+)-Ibuprofen BP/EP crystal, and obtaining polarimetry purity after cleaning, the drying is 98%
+ 57.4.) (S)-(+)-Ibuprofen BP/EP, yield is 38.2% (78.8 gram) of initial racemoid.
Embodiment 3
With racemize Ibuprofen BP/EP (206.3 grams, 1 mole) and L-(-)-1-(3, the 4-dihydroxy phenyl)-2-methylethylolamine (184.2 grams, 1 mole) and L-Methionin (146.2 gram, 1 mole) gradation be suspended in the mixed solvent of 900 milliliters of benzene and triethylamine (ratio 7: 1.5), with suspension reflux 5 hours, make this solution be cooled to about room temperature, filtration is also drying precipitated, and other is operated with embodiment 1, obtains polarimetry purity 99% through behind the primary crystallization
+ 57.8 °) (S)-(+)-Ibuprofen BP/EP, yield is 40.1% (82.7 gram) of initial racemoid.
Embodiment 4
With racemize Ibuprofen BP/EP (206.3 grams, 1 mole) and (1R, 2S)-(-)-l-hydroxyl-2-methylamino-phenylpropyl alcohol alkane (99.1 grams, 0.6 mole) and (-)-α-amphetamine (81.8 grams, 0.6 mole) gradation was suspended in the mixed solvent of 680 milliliters of sherwood oils and Monoethanolamine MEA BASF (ratio 8: 1), with suspension reflux 2.5 hours.Make this solution be cooled to room temperature, filter and drying precipitated crystal, other is operated with embodiment 1, can obtain polarimetry purity 99% through behind the primary crystallization
+ 57.2 °) (S)-(+)-Ibuprofen BP/EP, yield is 34.0% (70.1 gram) of initial racemoid.
Claims (3)
1. the method for splitting of a racemize Ibuprofen BP/EP, it is characterized in that: with the racemize Ibuprofen BP/EP be suspended in after the A component resolving agent of 0.5-1 times of molar weight mixes in the mixed solvent reflux 0.5-3 hour, then, the B component resolving agent that adds 0.5-1 times of molar weight, refluxed again 0.5-2 hour, then resolving agent forms corresponding diastereoisomeric salt with (S)-(+)-Ibuprofen BP/EP and R-(-)-Ibuprofen BP/EP reaction respectively, wherein the diastereoisomeric salt of (S)-(+)-Ibuprofen BP/EP precipitates because of solubleness is less and separates out, after treating that this solution is cooled to room temperature, filter, drying precipitated, and, crystallization is suspended in saturated Na with behind the ethyl alcohol recrystallization
2CO
3In the solution, this moment, the resolving agent precipitation in the crystallization was separated out, and (S)-(+)-Ibuprofen BP/EP in the crystallization exists in solution with the form of sodium salt, with this solution of hcl acidifying of 0.5-10% to pH value less than 5, then (S)-(+)-Ibuprofen BP/EP precipitation is separated out, and promptly gets pure product after cleaning, drying; Described A component is a chiral amino alcohol, and the B component is chiral aryl amine or amino acid.
2. method according to claim 1 is characterized in that: described pair of component resolution reagent use total amount doubly as the 1-2 of Ibuprofen BP/EP molar weight, and the order of addition(of ingredients) of A component and B component resolving agent can exchange.
3. method according to claim 2, it is characterized in that: described A component is meant amino alcohol, comprise 1-p-nitrophenyl-2-amino-1, ammediol, 1-are to methylsulfonyl phenyl-2-amino-1, ammediol, 1-phenyl-2-amino-1, ammediol, 1-hydroxyl-2-methylamino-phenylpropyl alcohol alkane, norephedrine or norpseudoephedrine; The B component is meant chiral aryl amine or amino acid, wherein chiral aryl amine comprise α-Ben Yian, to methyl-α-Ben Yian, α-amphetamine or β-amphetamine, amino acid comprises p-hydroxybenzene Padil or Methionin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN00114429A CN1102137C (en) | 2000-03-16 | 2000-03-16 | Method for splitting ibuprofen by two-component chiral reagent |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN00114429A CN1102137C (en) | 2000-03-16 | 2000-03-16 | Method for splitting ibuprofen by two-component chiral reagent |
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| CN1314336A CN1314336A (en) | 2001-09-26 |
| CN1102137C true CN1102137C (en) | 2003-02-26 |
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| CN00114429A Expired - Fee Related CN1102137C (en) | 2000-03-16 | 2000-03-16 | Method for splitting ibuprofen by two-component chiral reagent |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN100336803C (en) * | 2003-12-04 | 2007-09-12 | 上海药明康德新药开发有限公司 | Method for preparing optical pure N-tertiary butyl oxycarbonyl-beta-difluorine phenylalanine |
| CN101225427B (en) * | 2007-12-14 | 2011-07-20 | 华南理工大学 | Method for improving reaction rate of enzymatic ibuprofen chiral separation |
| CN103242117A (en) * | 2012-02-03 | 2013-08-14 | 爱普香料集团股份有限公司 | Preparation method for (R)-(+)-gamma-lactone fragrance |
| CN103113211A (en) * | 2013-02-04 | 2013-05-22 | 浙江工业大学 | Splitting method for racemic 2-benzene propanoic acid |
| CN110627629A (en) * | 2019-10-15 | 2019-12-31 | 山东新华制药股份有限公司 | Method for producing ibuprofen through multistage continuous reaction crystallization |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4786731A (en) * | 1987-08-05 | 1988-11-22 | The Dow Chemical Company | Resolution of enantiomers of 2-(phenyl or phenoxy/propionic acids using optically active alkanolamines |
| US5332834A (en) * | 1992-12-02 | 1994-07-26 | Hoechst Celanese Corporation | Racemization of an enantomerically enriched α-aryl carboxylic acid |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4786731A (en) * | 1987-08-05 | 1988-11-22 | The Dow Chemical Company | Resolution of enantiomers of 2-(phenyl or phenoxy/propionic acids using optically active alkanolamines |
| US5332834A (en) * | 1992-12-02 | 1994-07-26 | Hoechst Celanese Corporation | Racemization of an enantomerically enriched α-aryl carboxylic acid |
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