CN101321771B - Process for the preparation of a potassium salt of penicillin - Google Patents
Process for the preparation of a potassium salt of penicillin Download PDFInfo
- Publication number
- CN101321771B CN101321771B CN2006800452303A CN200680045230A CN101321771B CN 101321771 B CN101321771 B CN 101321771B CN 2006800452303 A CN2006800452303 A CN 2006800452303A CN 200680045230 A CN200680045230 A CN 200680045230A CN 101321771 B CN101321771 B CN 101321771B
- Authority
- CN
- China
- Prior art keywords
- penicillium mould
- penicillin
- sylvite
- mixture
- butyl acetate
- 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.)
- Active
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D499/00—Heterocyclic compounds containing 4-thia-1-azabicyclo [3.2.0] heptane ring systems, i.e. compounds containing a ring system of the formula:, e.g. penicillins, penems; Such ring systems being further condensed, e.g. 2,3-condensed with an oxygen-, nitrogen- or sulfur-containing hetero ring
- C07D499/04—Preparation
- C07D499/14—Preparation of salts
- C07D499/16—Preparation of salts of alkali or alkaline earth metals
Abstract
Process for the preparation of a potassium salt of penicillin G (Pen G K) or penicillin V (Pen V K) in crystal form from a suspension comprising Pen G K or penicillin V (Pen V K), an organic solvent and a C1 to C3 alcohol.
Description
The present invention relates to prepare the technology of the potassium penicillin G (Pen G K) or the DQV-K (Pen V K) of crystalline form.
Penicillium mould is normally produced from zymotechnique with microorganism strains, and said bacterial strain can be produced penicillium mould when having suitable side chain precursor.For example, penicillin G is through when having the side chain precursor toluylic acid, being produced by the selected bacterial strain of Penicillium chrysogenum.After the fermentation, depend on the type of penicillium mould,, from fermentation culture, reclaim penicillium mould according to currently known methods.
Reclaim in the technology at the typical prior art penicillin G; Fermentation culture to obtaining filters, the washing filter residue, afterwards; After to the filtrate acidifying, the penicillin G that exists in the filtrate of collecting is extracted in the organic solvent (for example n-butyl acetate or hexone).Can under gac is assisted, decolour then, and penicillin G acid is stripped in the water, use the sylvite aqueous solution (for example potassium acetate) to neutralize again the extract that obtains thus.With this solution and q.s second solvent (for example propyl carbinol) mix, use the evaporation of n-butanol-water azeotrope to reduce water-content afterwards, through filtering and subsequently washing and drying, reclaim the penicillin G K crystal that forms again.The shortcoming that this prior art reclaims technology is that during its n-butanol-water azeotrope evaporation, because the degraded of Pen G K, Pen G K is loss in a large number, causes the productive rate of Pen G K significantly to reduce (for example,＜92%).
In another kind of prior art processes; Directly obtain crystallization Pen G K from above-mentioned extract, this is then to carry out the azeotrope evaporation through adding potassium acetate or other suitable potassium source, refilters the Pen G K crystal of formation; It is suspended in the propyl carbinol, and filtration and drying realize.The shortcoming that this prior art reclaims technology is that afterwards, mother liquor had both comprised propyl carbinol and also comprised n-butyl acetate to separate final product (Pen G K).Two kinds of solvents all need be recovered; But in view of propyl carbinol is difficult to separate with n-butyl acetate, this solvent recovery step needs expensive equipment.In addition, in this technology, then Pen G K crystal is suspended in through crystallization in n-butyl acetate and obtains Pen G K crystal in the propyl carbinol, need carry out separating step twice Pen G K crystal, and non-once.
For V-cillin, can use identical technology in principle.But, since V-cillin under acidic conditions stability better, V-cillin can also be with sour form but not the potassium salt form crystallization can not cause unacceptable economically loss.
The purpose of this invention is to provide a kind of technology that simply and therefore has more economic attractiveness; Be used for: with sufficiently high (and preferably; Improve) productive rate; Prepare the have good quality potassium salt of penicillin of crystalline form of (preferably, improved quality), said penicillium mould is selected from the group of penicillin G and V-cillin.
" productive rate " is defined as in this article: for the penicillium mould that exists in the extract, and the % productive rate of penicillium mould in the sylvite of the penicillium mould of group crystalline form, that be selected from penicillin G and V-cillin.Enough height are defined as in this article: preferably at least 90%, more preferably at least 92%, more preferably at least 94%, more preferably at least 95%, more preferably at least 96%, more preferably at least 97%, most preferably at least 98%.
" good quality " is defined as in this article: the sylvite of the penicillium mould of that finally obtain, crystalline form, as to be selected from penicillin G and V-cillin group contains considerably less impurity or free from foreign meter, and for example, foreign matter content is less than 5% (w/v), more preferably, is less than 4%; More preferably, be less than 3%, more preferably, be less than 2%; More preferably, be less than 1%, more preferably, be less than 0.5%; More preferably, be less than 0.25%, further more preferably, be less than 0.1%.Impurity can for example be 6-amino-penicillanic acid (6-APA), toluylic acid (PA), the penicillic acid (penicillic acid) to hydroxyl penicillin G, penicillin G, the penicilloic acid (penicilloicacid) of penicillin G and the penilloic acid (penilloic acid) and the corresponding impurity to V-cillin of penicillin G.
In one aspect; The invention provides a kind of technology; Be used for: prepare the sylvite of the penicillium mould of group crystalline form, that be selected from penicillin G and V-cillin from following suspension-s, said suspension-s comprises sylvite, the organic solvent of the penicillium mould of the group that is selected from penicillin G and V-cillin and is selected from C
1, C
2And C
3The alcohol of the group that alcohol constitutes.Preferably, said penicillium mould is penicillin G.Amazing ground; We find; In technology according to the present invention; The productive rate of the sylvite of the penicillium mould of group crystalline form, that be selected from penicillin G and V-cillin is that preamble is defined sufficiently high, and equal or even be higher than technology known in the art, the crystalline quality that obtains simultaneously is good like the preamble definition.Another advantage of technology of the present invention is, only needs a step separating step, and this has not only brought sufficiently high productive rate, has also brought sizable economical advantage.
In technology of the present invention, organic solvent can be any appropriate organic solvent well known by persons skilled in the art.The example of this type of appropriate organic solvent is pentyl acetate, n-butyl acetate, ETHYLE ACETATE, hexone, pimelinketone, isopropylcarbinol or propyl carbinol.Preferably, organic solvent is a n-butyl acetate.
Alcohol according in the technology of the present invention is selected from C
1, C
2And C
3The group that alcohol constitutes, it is methyl alcohol, ethanol, n-propyl alcohol or Virahol preferably.Most preferably, said alcohol is methyl alcohol.
In the technology of the sylvite of the penicillium mould of group crystalline form produced according to the present invention, that be selected from penicillin G and V-cillin, penicillium mould can obtain from any suitable production technique known in the art.Penicillin G can for example be to produce mikrobe according to methods known in the art through fermentation penicillin G when having the side chain precursor toluylic acid, and for example the bacterial strain of Penicillium chrysogenum is produced.Can use any suitable technique, for example centrifugal or filtration from the fermentation culture separating biomass, produces the fermentation fluid that contains penicillium mould thus.Preferably, the application of filtration step is come from the nutrient solution separating biomass.Alternatively, residual solid is washed.
Through adding at least a acid, for example sulfuric acid, spirit of salt or nitric acid or their any combination is acidified to fermentation culture or fluid the pH in 2 to 4 the scope, preferably, and the pH in 2.5 to 3 the scope.Then through being extracted in the organic solvent, with penicillium mould with separate through the acidifying water.Can use any appropriate organic solvent, for example, pentyl acetate, n-butyl acetate, ETHYLE ACETATE, hexone, pimelinketone, isopropylcarbinol or propyl carbinol.Preferably, organic solvent is a n-butyl acetate.The adding of suitable de-emulsifier possibly significantly improve extraction.
" extract " is defined as following organic solvent in this article, and the penicillium mould that is selected from the group of penicillin G and V-cillin has been extracted in the said organic solvent.Alternatively, can be according to methods known in the art, comprise the extract of penicillium mould with activated carbon treatment, to remove impurity.
In one embodiment of the invention; Crossed by activated carbon treatment alternatively, can mix with suitable potassium source subsequently according to the extract of penicillium mould preamble definition, that comprise the group that is selected from penicillin G and V-cillin; Penicillium mould with the group that will be selected from penicillin G and V-cillin is converted into corresponding potassium salt of penicillin, obtains to comprise the mixture of organic solvent and potassium salt of penicillin thus.
Preferably such with the consumption in the suitable potassium source of the extract blended of the penicillium mould that comprises the group that is selected from penicillin G and V-cillin: said consumption makes the potassium that for penicillium mould, adds 0.4 to 3 molar equivalent.Preferably, for penicillium mould, add the potassium of 0.6 to 2 molar equivalent, more preferably, the potassium of 0.7 to 1.6 molar equivalent, more preferably, the potassium of 0.8 to 1.4 molar equivalent, more preferably, the potassium of 0.9 to 1.2 molar equivalent.Most preferably, the potassium that for penicillium mould, adds 1 molar equivalent.Suitable potassium source is to be preferably any sylvite of faintly acid.The example in the potassium source that this type of is suitable is potassium acetate or salt of wormwood.The potassium source can be used with solid form, perhaps can be water-soluble earlier, form the aqueous solution in potassium source.The suitable concn in potassium source is in the aqueous solution, for example, and between 10 to 60%w/v, for example, between 15 to 55%w/v, for example between 20 to 50%.
Subsequently, can from the mixture that comprises the organic solvent and the sylvite of the penicillium mould of the group that is selected from penicillin G and V-cillin, remove a part of anhydrating, perhaps comprise the part of the azeotrope (the for example azeotrope of water and n-butyl acetate) of water and organic solvent.The water that is present in the mixture maybe be from fermentation culture or from organic solvent, or along with the aqueous solution in potassium source is introduced into.Preferably, after the part of water or azeotrope was removed, the water-content that comprises the organic solvent and the mixture of the sylvite of the penicillium mould of the group that is selected from penicillin G and V-cillin was＜10% (v/v), more preferably;＜5% (v/v), more preferably,＜2.5% (v/v); More preferably,＜1% (v/v), more preferably;＜0.5% (v/v), most preferably,＜0.2% (v/v).
According to mentioned above, at first after the part evaporation with the azeotrope of the part of water or water/organic solvent, in mixture, add and be selected from C
1, C
2And C
3The alcohol of the group that alcohol constitutes is with sylvite, organic solvent and the pure suspension-s of the penicillium mould that obtains to comprise the group that is selected from penicillin G and V-cillin.Alcohol can be methyl alcohol, ethanol, n-propyl alcohol or Virahol.Preferably, said alcohol is methyl alcohol.
Preferably, be selected from C
1, C
2And C
3The alcohol of the group that alcohol constitutes is (dry) that does." do " expression alcohol when using in this article and contain the water that is less than 10% (v/v), preferably, be less than the water of 5% (v/v), preferably, be less than 2% (v/v).Most preferably, the alcohol of doing contains the water of 0% (v/v).
After being in contact with one another, can carry out the stirring of certain hour to the suspension-s of sylvite, organic solvent and the alcohol of the penicillium mould that comprises the group that is selected from penicillin G and V-cillin.Preferably, to the suspension-s time of carrying out be the stirring between 5 minutes to 24 hours, preferably, between 10 minutes to 12 hours, more preferably, between 20 minutes to 8 hours, more preferably, between 0.5 hour to 6 hours, more preferably, between 45 minutes to 3 hours.Preferably, to suspension-s stir the sylvite of penicillium mould of the group that is selected from penicillin G and V-cillin crystal formation till.More preferably, to suspension-s stir the sylvite of penicillium mould of the group that is selected from penicillin G and V-cillin crystal formation and do not lump till.Can under any suitable temperature, stir suspension-s, preferably, the temperature between 0 to 40 ℃, more preferably, between 5 to 30 ℃, most preferably, between 10 to 25 ℃.
In the suspension-s according to technology of the present invention, the volume of alcohol can be any suitable ratio with the ratio that comprises the organic solvent and the volume of the mixture of the sylvite of the penicillium mould of the group that is selected from penicillin G and V-cillin.Preferably, this ratio is between 1: 20 to 1: 3, preferably, and between 1: 15 to 1: 4, preferably, between 1: 10 to 1: 6.
During technology of the present invention, be selected from the partly or entirely crystallization of sylvite of penicillium mould of the group of penicillin G and V-cillin.For example; After the extract that comprises penicillium mould adds suitable potassium source and/or during the part of the azeotrope of the part of water or water/organic solvent is evaporated from the mixture that comprises the organic solvent and the sylvite of the penicillium mould of the group that is selected from penicillin G and V-cillin, the sylvite of penicillium mould that is selected from the group of penicillin G and V-cillin can begin crystallization.When the mixture of the sylvite (alternatively, partly or entirely crystalline) that comprises the organic solvent and the penicillium mould of the group that is selected from penicillin G and V-cillin and be selected from C
1, C
2And C
3When the alcohol of the group that alcohol constitutes contacts; And/or during the suspension-s of sylvite, organic solvent and the alcohol of the penicillium mould that comprises the group that is selected from penicillin G and V-cillin stirred, be selected from the sylvite also further crystallization or the recrystallization of penicillium mould of the group of penicillin G and V-cillin.
In another embodiment; In the extract of the penicillium mould of the group that is selected from penicillin G and V-cillin that contains according to preamble said definition and acquisition, add suitable potassium source; And comprise after the azeotrope evaporation of organic solvent and water; For example through filtering the crystal of the sylvite of the penicillium mould of the group that is selected from penicillin G and V-cillin that collection obtains.Under the condition identical (for example), thus obtained crystal is suspended in again comprises the described organic solvent of preamble and be selected from C at aspects such as the ratio of alcohol/organic solvent, time, temperature with aforementioned embodiments
1, C
2And C
3In the mixture of the alcohol of the group that alcohol constitutes.
In any embodiment of the present invention, can be through any suitable method known in the art, the sylvite of the penicillium mould of the group isolation of crystalline form, that be selected from penicillin G and V-cillin from suspension-s for example carries out through centrifugal or filtration.Can obtain the wet cake of the potassium salt of penicillin of crystalline form then.Alternatively, with organic solvent or organic solvent and be selected from C
1, C
2And C
3The mixture of the alcohol of the group that alcohol constitutes washs this wet cake.If used washing step, preferably, organic solvent is identical with the organic solvent that is used for extract, and, be selected from C
1, C
2And C
3The alcohol of the group that alcohol constitutes be used for the pure identical of suspension-s.Can use any suitable technique known in the art, come the wet cake of sylvite of the penicillium mould of the group dried crystals form, that be selected from penicillin G and V-cillin.In this embodiment of the present invention, penicillium mould is penicillin G preferably.
Alternatively, the crystalline wet cake of sylvite that will comprise the penicillium mould of the group that is selected from penicillin G and V-cillin mixes with water, obtains to be selected from the aqueous solution of sylvite of penicillium mould of the group of penicillin G and V-cillin.But extracting then (strip) aqueous solution is with the organic solvent of removing trace and/or be selected from C
1, C
2And C
3The alcohol of the group that alcohol constitutes.Extracting comprises the evaporation of water, organic solvent and/or alcohol.The aqueous solution of sylvite of penicillium mould that is selected from the group of penicillin G and V-cillin can be used for proceeding to through methods known in the art (for example, EP 0,977 883 is described) Enzymatic transformation of 6-amino-penicillanic acid (6-APA).Available suitable penioillin acylase is handled and is comprised the solution of sylvite of penicillium mould that dissolved is selected from the group of penicillin G and V-cillin; Said enzyme for example is suitable penicillin G acylase; So that penicillin G deacylation; And suitable V-cillin acyltransferase, so that V-cillin deacylation.The biology that can produce suitable penioillin acylase that come to light is; For example, the kind of Acetobacter, Aeromonas, Alcaligenes, Aphanocladium, Bacillus sp., Cephalosporium, Escherichia, Flavobacterium, Kluyvera, Mycoplana, Protaminobacter, Providentia, Pseudomonas or Xanthomonas.Confirm that especially the enzyme that obtains from Acetobacterpasteurioanum, Alcaligenes faecalis, Bacillus megaterium, Escherichia coli, Providentia rettgeri and Xanthomonas citrii can successfully be used for according to the method for the invention.In document, penioillin acylase also is called as penicillin amidase.Penioillin acylase can be used as the free enzyme and uses, and also can be suitable for any suitable form that is fixed, and for example, describes among EP 0 222 462 and the WO 97/04086.Through penioillin acylase the Enzymatic transformation that dissolved Pen G K carries out is caused forming 6-amino-penicillanic acid (6-APA) and toluylic acid.
Embodiment 1 comparing embodiment
The K that in the extract of activated carbon treatment, adds 30% (w/w) to 1000ml
2CO
3The aqueous solution; Make mixture contain the potassium of about 1.0 molar equivalents for penicillin G; The every ml of wherein said extract contains the penicillin G of about 100,000 Oxford units, is in (1 Oxford unit equals the penicillin G of about 0.6 microgram) in the n-butyl acetate.Should mix with the 200ml propyl carbinol by the reextraction thing, use rotary thin film evaporation appearance (50-60 ℃ of temperature bathed) under vacuum, the mixture that obtains to be heated.During evaporating, by a part adding propyl carbinol, the total amount of the feasible propyl carbinol that adds is 200ml.The n-butanol/water of total coevaporation 250ml is cooled to room temperature with resistates.Through the formed Pen G of filtering separation K crystal, with propyl carbinol washing and dry.Productive rate (defined according to preamble) is 91%.
Embodiment 2
Carry out a series of experiments, wherein, in the extract (every ml contains the penicillin G of about 100,000 Oxford units, is in the n-butyl acetate) of activated carbon treatment, add the K of 50% (w/w) to 1000ml
2CO
3The aqueous solution makes mixture contain the potassium of about 1.0 molar equivalents for penicillin G.Rotary thin film evaporation appearance (45-48 ℃ of temperature bathed) heats the mixture that obtains under vacuum, makes a certain amount of mixture evaporate thus---about amount, referring to table 1 to every experiment.Subsequently, in resistates, add methyl alcohol, mixture is carried out stirring in 1 hour at 25 ℃.Filtering suspension liquid is washed wet cake with the 70ml n-butyl acetate, afterwards the dry wet filter cake.
Table 1: the crystallization of Pen G K in the acetate propyl carbinol+in resistates, add methyl alcohol
| # | The volume (ml) of evaporation | Residual moisture content (%) | The methyl alcohol (ml) that adds | Mother liquor volume (ml) | Mother liquor loss (%) | Productive rate (%) |
| 1 | 190(16) | nd | 100 | 770 | 1.7 | 96.5 |
| 2 | 328(16) | nd | 100 | 645 | 1.6 | 96.3 |
| 3 | 292(13) | 0.04 | 100 | 620 | 1.2 | 98.0 |
| 4 | 334(18) | 0.04 | 100 | 650 | 1.7 | 97.5 |
| 5 | 206(19) | 0.18 | 150 | 720 | 2.3 | 94.5 |
The volume of evaporation is the TV of evaporation, and the value in the bracket is represented the volume of water layer in the overhead product.The water-content of resistates after the representative evaporation of water-content one hurdle.All experiments have all produced white Pen G K crystal with high yield (defined according to preamble), and said productive rate is for the penicillium mould content of the extract of handling through carbon (=100%), and mother liquor only has very limited penicillium mould loss.Contain 99.3% Pen G K (that is, good quality) from experiment 1 crystal.
Claims (4)
1. the technology of the suspension-s of sylvite, n-butyl acetate and a methyl alcohol for preparing the penicillium mould that comprises the group that is selected from penicillin G and V-cillin, said technology comprises the steps:
The n-butyl acetate that a) will comprise the said penicillium mould of the group that is selected from penicillin G and V-cillin mixes with suitable potassium source solid form or aqueous solution form; Said penicillium mould is converted into the sylvite of corresponding said penicillium mould, acquisition comprises the mixture of the sylvite of said n-butyl acetate and said penicillium mould thus;
B) remove portion water through evaporation, perhaps remove the azeotrope that comprises water and n-butyl acetate of part, make water-content＜0.2% (v/v) of the said mixture that obtains through evaporation;
C) add methyl alcohol to the said mixture that in step b), obtains, to obtain said suspension-s.
2. technology as claimed in claim 1 is characterized in that said penicillium mould is penicillin G.
3. be used to prepare the technology of sylvite of the penicillium mould of crystalline form, it may further comprise the steps:
The n-butyl acetate that a) will comprise the said penicillium mould of the group that is selected from penicillin G and V-cillin mixes with suitable potassium source solid form or aqueous solution form; Said penicillium mould is converted into the sylvite of corresponding said penicillium mould, acquisition comprises the mixture of the sylvite of said n-butyl acetate and said penicillium mould thus;
B) remove portion water through evaporation, perhaps remove the azeotrope that comprises water and n-butyl acetate of part, make water-content＜0.2% (v/v) of the said mixture that obtains;
C) add methyl alcohol to the said mixture that in step b), obtains, with obtain suspension-s and;
D) sylvite of the penicillium mould of isolation of crystalline form from said suspension-s with the wet cake of the sylvite of the penicillium mould that obtains crystalline form, and alternatively, washs and/or dry it.
4. be used to prepare the technology of 6-APA, it may further comprise the steps:
The n-butyl acetate that a) will comprise the said penicillium mould of the group that is selected from penicillin G and V-cillin mixes with suitable potassium source solid form or aqueous solution form; Said penicillium mould is converted into the sylvite of corresponding said penicillium mould, acquisition comprises the mixture of the sylvite of said n-butyl acetate and said penicillium mould thus;
B) remove portion water through evaporation, perhaps remove the azeotrope that comprises water and n-butyl acetate of part, make water-content＜0.2% (v/v) of the said mixture that obtains;
C) add methyl alcohol to the said mixture that in step b), obtains, to obtain suspension-s;
D) sylvite of the penicillium mould of isolation of crystalline form from said suspension-s with the wet cake of the sylvite of the penicillium mould that obtains crystalline form, and alternatively, washs and/or dry it; With
E) said wet cake is mixed with water,, use it for Enzymatic transformation subsequently to 6-amino-penicillanic acid (6-APA) to obtain the aqueous solution of potassium salt of penicillin.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP05111630 | 2005-12-02 | ||
| EP05111630.9 | 2005-12-02 | ||
| EP06110094 | 2006-02-17 | ||
| EP06110094.7 | 2006-02-17 | ||
| PCT/EP2006/069146 WO2007063107A1 (en) | 2005-12-02 | 2006-11-30 | Process for the preparation of a potassium salt of penicillin |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101321771A CN101321771A (en) | 2008-12-10 |
| CN101321771B true CN101321771B (en) | 2012-05-30 |
Family
ID=35759172
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2006800452303A Active CN101321771B (en) | 2005-12-02 | 2006-11-30 | Process for the preparation of a potassium salt of penicillin |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101321771B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2599401A (en) * | 1947-08-15 | 1952-06-03 | Lilly Co Eli | Process of obtaining crystalline penicillin salts |
| CN1191221A (en) * | 1997-12-31 | 1998-08-26 | 华北制药股份有限公司 | Process for one-shot crystallization of sodium penicillin |
| EP1475444A1 (en) * | 1997-04-22 | 2004-11-10 | DSM IP Assets B.V. | Improved process for the fermentative production of penicillin |
-
2006
- 2006-11-30 CN CN2006800452303A patent/CN101321771B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2599401A (en) * | 1947-08-15 | 1952-06-03 | Lilly Co Eli | Process of obtaining crystalline penicillin salts |
| EP1475444A1 (en) * | 1997-04-22 | 2004-11-10 | DSM IP Assets B.V. | Improved process for the fermentative production of penicillin |
| CN1191221A (en) * | 1997-12-31 | 1998-08-26 | 华北制药股份有限公司 | Process for one-shot crystallization of sodium penicillin |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101321771A (en) | 2008-12-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20090162905A1 (en) | Method for Purification of Hyaluronic Acid Salt | |
| KR100293172B1 (en) | Streptomyces sp. Novel method for isolating clavulanic acid and its pharmaceutically acceptable salts from fermentation broth of P6621 FERM P2804 | |
| CN101062934B (en) | Method for extracting natamycin from fermentation technique culture | |
| CN104480181A (en) | Preparation method for 3-deacetyl-7-aminocephalosporanic acid | |
| EP0977883B1 (en) | Improved process for the fermentative production of penicillin | |
| JP4275621B2 (en) | Method for producing ubiquinone-10-containing solution | |
| CN101321771B (en) | Process for the preparation of a potassium salt of penicillin | |
| TW565612B (en) | Improved process for the fermentative production of cephalosporin | |
| JPH07135989A (en) | Preparation of antibiotic | |
| CN113402572A (en) | Process for refining glucosamine composite salt prepared by microbial fermentation method | |
| WO2007063107A1 (en) | Process for the preparation of a potassium salt of penicillin | |
| CN113005168B (en) | Preparation method of 6-aminopenicillanic acid | |
| CN1312814A (en) | Improved process for preparing salts and esters of clavulanic acid | |
| JP2873894B2 (en) | Cyclic depsipeptide and method for producing the same | |
| CZ307497A3 (en) | Method of isolating ampicillin | |
| MX2008007066A (en) | Process for the preparation of a potassium salt of penicillin | |
| JP2592468B2 (en) | Benanomycins A and B, novel antibiotics and their production | |
| NO880590L (en) | HIGHER ALKYLPYRROLIDON EXTRACTING AGENTS FOR WATER SOLUBLE PHENOLIC OR CARBOCYCLIC ANTIBIOTICS. | |
| JPH101496A (en) | Purification of avermectin | |
| JPH0956389A (en) | Purification of avermectin | |
| JPS62277373A (en) | Production of (-)-trans-2,3-epoxysuccinic acid by fermentation | |
| JPS6121480B2 (en) | ||
| JPS5898095A (en) | Production of demyssinosyl-mycinamicin 4 | |
| JPH01168284A (en) | Recovery of extracellular enzyme from full fermentation beer | |
| JPS6326118B2 (en) |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| REG | Reference to a national code |
Ref country code: HK Ref legal event code: DE Ref document number: 1126476 Country of ref document: HK |
|
| ASS | Succession or assignment of patent right |
Owner name: NETHERLANDS COMPANY OF DSM SINOCHEM PHARMACEUTICAL Free format text: FORMER OWNER: DSM IP ASSETS BV Effective date: 20120330 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20120330 Address after: About Holland Applicant after: DSM SINOCHEM PHARMACEUTICALS NETHERLANDS B.V. Address before: Holland Heerlen Applicant before: DSM IP ASSETS B.V. |
|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| REG | Reference to a national code |
Ref country code: HK Ref legal event code: GR Ref document number: 1126476 Country of ref document: HK |
|
| CP01 | Change in the name or title of a patent holder |
Address after: About Holland Patentee after: DSM Sinochem Pharmaceuticals Netherlands B.V. Address before: About Holland Patentee before: DSM SINOCHEM PHARMACEUTICALS NETHERLANDS B.V. |
|
| CP01 | Change in the name or title of a patent holder |