EP1438414A1 - Verfahren zur selektiven oxidation von substituierten toluolen durch mikrobielle peroxidasen aus coprinus - Google Patents
Verfahren zur selektiven oxidation von substituierten toluolen durch mikrobielle peroxidasen aus coprinusInfo
- Publication number
- EP1438414A1 EP1438414A1 EP02774660A EP02774660A EP1438414A1 EP 1438414 A1 EP1438414 A1 EP 1438414A1 EP 02774660 A EP02774660 A EP 02774660A EP 02774660 A EP02774660 A EP 02774660A EP 1438414 A1 EP1438414 A1 EP 1438414A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- coprinus
- microbial
- peroxidase
- oxidation
- peroxydases
- 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.)
- Withdrawn
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
- C12N9/00—Enzymes; Proenzymes; Compositions thereof; Processes for preparing, activating, inhibiting, separating or purifying enzymes
- C12N9/0004—Oxidoreductases (1.)
- C12N9/0065—Oxidoreductases (1.) acting on hydrogen peroxide as acceptor (1.11)
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12P—FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE
- C12P7/00—Preparation of oxygen-containing organic compounds
- C12P7/02—Preparation of oxygen-containing organic compounds containing a hydroxy group
- C12P7/22—Preparation of oxygen-containing organic compounds containing a hydroxy group aromatic
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12P—FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE
- C12P7/00—Preparation of oxygen-containing organic compounds
- C12P7/24—Preparation of oxygen-containing organic compounds containing a carbonyl group
Definitions
- the present invention relates to a process for the selective oxidation of toluene derivatives by microbial peroxidases from microorganisms of the genus Coprinus.
- Substituted benzaldehydes are valuable intermediates in chemical synthesis.
- the chemical production of these benzaldehydes by oxidation of the corresponding substituted toluenes is often difficult to achieve, since the methyl side chain is often oxidized to the carboxyl function by the oxidation reaction and does not remain at the stage of the aldehyde function.
- the present invention is therefore based on the object of providing a process for the selective oxidation of substituted toluenes by microbial peroxidases which both ensures a high conversion of the substrates and achieves the lowest possible proportion of substituted benzoic acids.
- the peroxidases used can be used in different degrees of purity. A partially purified peroxidase solution that no longer has laccase activity is preferred.
- the peroxidase from Coprinus spec DSM 14525 (deposited on September 25, 2001 at DSM) is particularly preferably used.
- the peroxidase can be used in a variety of solvents. Buffered solutions are preferred which consist of at least 30%, preferably at least 50%, water.
- the hydrogen peroxide causing the oxidation can be added in stoichiometric or superstoichiometric amounts. A continuous feed of the hydrogen peroxide into the reaction medium is preferred.
- the reaction temperature can be freely selected between 0 and 50 ° C. At low temperatures, the enzymatic conversion is slowed down considerably, while high temperatures can lead to inactivation of the enzyme.
- the optimal reaction temperature is therefore between 10 and 30 ° C and can easily be determined by a person skilled in the art on the basis of series tests.
- the oxidation of the methyl side chain in the process according to the invention depends on the further substituents on the aromatic nucleus and their position in relation to the methyl chain.
- Preferred further substituents R are methyl, isopropyl, t-butyl, halogen, methyl and nitro groups.
- the position of the radical R relative to the methyl chain is obviously more important than the nature of the radical R.
- An exception to this are nitrotoluenes.
- o-Nitrobenzaldehyde was obtained in a relatively low yield, while the m-Nitrobenzaldehyde yield was comparable to p-Nitrobenzaldehyde.
- o-Nitrotoluene was also the only substrate on which the corresponding alcohol derivative was found. No oxidation of the methyl chain to alcohol was observed for any other substrate.
- Another object of the invention is a microbial peroxidase from Coprinus, which is capable of oxidizing toluene so selectively to benzaldehyde by H 2 0 2 that less than 0.4 mol of benzoic acid is formed per mole of oxidized toluene.
- Coprinus spec. DSM 14525 was fermented in 20 liter medium (soy meal). Mycelium and soy meal were removed by centrifugation. The resulting supernatant was clarified by ultrafiltration (pore size 0.16 ⁇ m). The filtrates were then concentrated by ultrafiltration with a membrane with 10kDa cutoff. The peroxidase was purified from the filtrate using FPLC. Two chromatography steps on Q-Sepharose with pH 5 and pH 7.3 gave a 12-fold activity enrichment (specific activity was 7.6 U / mg protein with ABTS, 2.2 azino-bis (3-ethylbenzthiazoline-6-sulfonic acid) Enzyme preparation showed no laccase activity.
- This peroxidase preparation was used for the following reactions.
- reaction batches were incubated at room temperature. With a syringe, 4.5 ⁇ l hydrogen peroxide (50 mM) was added through a membrane every 10 minutes (a total of nine times). At the halfway point of the biotransformation, an additional 25 ⁇ l peroxidase solution was added. The concentration of the compounds was determined by comparison with authentic standards by HPLC. The structure of the compounds obtained was confirmed by GC-MS.
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Zoology (AREA)
- Wood Science & Technology (AREA)
- Health & Medical Sciences (AREA)
- Genetics & Genomics (AREA)
- Bioinformatics & Cheminformatics (AREA)
- General Health & Medical Sciences (AREA)
- Biochemistry (AREA)
- General Engineering & Computer Science (AREA)
- Microbiology (AREA)
- Biotechnology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Medicinal Chemistry (AREA)
- Molecular Biology (AREA)
- Biomedical Technology (AREA)
- Preparation Of Compounds By Using Micro-Organisms (AREA)
- Enzymes And Modification Thereof (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10149266A DE10149266A1 (de) | 2001-10-05 | 2001-10-05 | Verfahren zur selektiven Oxidation von substituierten Toluolen durch mikrobielle Peroxidasen aus Coprinus |
| DE10149266 | 2001-10-05 | ||
| PCT/EP2002/010867 WO2003031634A1 (de) | 2001-10-05 | 2002-09-27 | Verfahren zur selektiven oxidation von substituierten toluolen durch mikrobielle peroxidasen aus coprinus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP1438414A1 true EP1438414A1 (de) | 2004-07-21 |
Family
ID=7701575
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP02774660A Withdrawn EP1438414A1 (de) | 2001-10-05 | 2002-09-27 | Verfahren zur selektiven oxidation von substituierten toluolen durch mikrobielle peroxidasen aus coprinus |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20040254083A1 (de) |
| EP (1) | EP1438414A1 (de) |
| JP (1) | JP2005504553A (de) |
| DE (1) | DE10149266A1 (de) |
| WO (1) | WO2003031634A1 (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7646850B2 (ja) | 2021-02-09 | 2025-03-17 | エフ. ホフマン-ラ ロシュ アーゲー | 核酸中のメチル化の塩基レベル検出のための方法 |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4503153A (en) * | 1982-03-29 | 1985-03-05 | Cetus Corporation | Method for producing aldehydes from primary alcohols |
| AU4112597A (en) * | 1996-09-03 | 1998-03-26 | Novo Nordisk A/S | Peroxidase variants |
-
2001
- 2001-10-05 DE DE10149266A patent/DE10149266A1/de not_active Withdrawn
-
2002
- 2002-09-27 JP JP2003534604A patent/JP2005504553A/ja not_active Withdrawn
- 2002-09-27 EP EP02774660A patent/EP1438414A1/de not_active Withdrawn
- 2002-09-27 US US10/491,536 patent/US20040254083A1/en not_active Abandoned
- 2002-09-27 WO PCT/EP2002/010867 patent/WO2003031634A1/de not_active Ceased
Non-Patent Citations (1)
| Title |
|---|
| See references of WO03031634A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2003031634A1 (de) | 2003-04-17 |
| JP2005504553A (ja) | 2005-02-17 |
| US20040254083A1 (en) | 2004-12-16 |
| DE10149266A1 (de) | 2003-04-17 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| 17P | Request for examination filed |
Effective date: 20040506 |
|
| AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SK TR |
|
| AX | Request for extension of the european patent |
Extension state: AL LT LV MK RO SI |
|
| RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: RUSS, RAINER Inventor name: ANKE, TIMM Inventor name: BREUER, MICHAEL Inventor name: HABICHER, TILO Inventor name: ZELINSKI, THOMAS Inventor name: HAUER, BERNHARD |
|
| 17Q | First examination report despatched |
Effective date: 20060327 |
|
| RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: BASF SE |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
| 18D | Application deemed to be withdrawn |
Effective date: 20090401 |