WO2001028971A1 - Method for preparing chiral ester - Google Patents
Method for preparing chiral ester Download PDFInfo
- Publication number
- WO2001028971A1 WO2001028971A1 PCT/KR2000/001171 KR0001171W WO0128971A1 WO 2001028971 A1 WO2001028971 A1 WO 2001028971A1 KR 0001171 W KR0001171 W KR 0001171W WO 0128971 A1 WO0128971 A1 WO 0128971A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- group
- preparing
- ketone
- lipase
- formula
- Prior art date
Links
- NTPLXRHDUXRPNE-UHFFFAOYSA-N CC(c(cc1)ccc1OC)=O Chemical compound CC(c(cc1)ccc1OC)=O NTPLXRHDUXRPNE-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C67/00—Preparation of carboxylic acid esters
-
- 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
- C12P7/62—Carboxylic acid esters
Definitions
- the present invention relates to a method for preparing a chiral ester and more particularly, the method for preparing an optically pure chiral ester from a ketone at a high yield by using an enzyme and a metallic catalyst.
- an object of the present invention is to provide a simple process for preparing an optically pure chiral ester at a high yield to resolve the above problems.
- a process for preparing a chiral ester of the present invention is characterized by mixing and reacting: a ketone; a ruthenium complex selected from the group consisting of compounds
- 1, 2 and 3 expressed in formulas 1 to 3 to activate hydrogenation of said ketone to a racemic alcohol and racemization of said racemic alcohol; a lipase to acylate selectively one of enantiomers of said racemic alcohol; a hydride donor group to supply a hydride group to said ruthenium complex; and an acyl donor group to supply acyl group to said lipase,
- Yi, Y 2 , Y 3 , Y , Ys, Y ⁇ , 7, Ys, Y9, Yio, Y ⁇ , and Y 12 are independently a hydrogen atom or C1-C5 alkyl group; and X is Br, Cl or I; wherein Yi, Y 2 , Y3, Y4, Ys, Y ⁇ , Y7, Ys, Y9, Yio, Y11, and Y 12 are independently a hydrogen atom or C1-C5 alkyl group; and X is Br, Cl or I;
- Said ruthenium complex is selected from the group consisting of the compounds 5 to 10 expressed in the following formulas 5 to 10,
- X is Cl, Br or I, the most preferably Cl.
- a mixture of a ruthenium complex selected from the group consisting of formulas 1 to 3, a lipase, a hydride donor, an acyl donor, and a ketone is reacted in an appropriate solvent in the presence of a base as shown in Scheme 2.
- the reaction condition can be varied with a structure of ruthenium complex. For example, when the ruthenium complex of formula 5 is used, the reaction is performed at a temperature of 40 to 50 ° C . When the ruthenium complex of formula 8 is used, the reaction requires 40 to 50 ° C of a reaction temperature. When the ruthenium complex of formula 3 is used, the reaction requires 70 to 80 ° C of a reaction temperature.
- the ruthenium complex of formula 5 is commercially available and can be converted to the ruthenium complex of formula 8 in alcohol/ amine base condition. Therefore, results from the ruthenium complex of formula 5 and the ruthenium complex of formula 8 are almost same.
- a content of said ruthenium complex is preferred to use 0.1 to 5 mol%, relative to a ketone. If the content is more than 5 mol%, cost becomes expensive. On the other hand, if it is less than 0.1 mol%, the rate of the reaction becomes too slow.
- R 1 , R 2 and R 3 are, independently, optionally substituted alkyl, optionally substituted aryl or optionally substituted cycloalkyl group and R 1 and R 2 , R 1 and R 3 , and R 2 and R 3 can be cyclized each other, where said substituent of alkyl, aryl and cycloalkyl is a hetero atom such as halogen atom and a cyano group.
- Said ruthenium complex activates hydrogenation reaction of a ketone to a racemic alcohol by acting as a catalyst to transfer a hydrogen atom and further activates racemization of obtained racemic alcohol.
- Said lipase which is esterase, acylates one enantiomer from a racemic alcohol selectively to a chiral ester.
- lipase are Pseudomonas cepacias lipase and Candida antarctica lipase and more particulary, Candida antarctica component B lipase supported on acrylic resin (Novozym 435, Novo company) or Pseudomonas cepacias lipase supported on ceramic particle (lipase PS-C, Amano company), the most preferably Candida antarctica component B lipase supported on acrylic resin for heat resistance, reactivity, optical purity and the like.
- An amount of said lipase is in the range of 10 to 60mg, preferably 30 mg, relative to 1 mmol of a ketone in Novozym 435 case, and is in the range of 40 to 240 mg, preferably 80 mg, relative to 1 mmol of ketone in lipase PS-C case.
- Said ketone is generally expressed in the formula 4. It is not limited but examples of the present invention are compounds 4a, 4b, 4c, 4d, 4e, 4f or 4g, wherein R 1 and R 2 are the same as defined above.
- Said acyl donor supplies an acyl group to a lipase and acts to move a reaction balance to an acylated product in the presence of lipase catalyst.
- Preferred acyl donor is aryl ester or alkenyl acetate, the most preferably aryl ester such as p-chlorophenyl acetate having electron withdrawing group.
- An example of alkenyl acetate is isoprophenyl acetate.
- Such acyl donor compounds are preferred to use because they have an appropriate reactivity without inhibiting racemization.
- a preferred amount of said acyl donor compound is 2 to 4 equivalents to 1 equivalent of a ketone. If the amount is more than 4 equivalents to 1 equivalent of a ketone, it is difficult to isolate after reaction. On the other hand, if it is less than 2 equivalents to 1 equivalent of a ketone, the rate of acylation becomes too slow.
- a hydride donor supplies a hydride to ruthenium complex.
- Examples of said hydride donor are 2,6-dimethylheptan-4-ol, hydrogen, and formic acid.
- Preferred amount of said hydride donor is 1 to 2 equivalents to 1 equivalent of ketone. If the content deviates from the range, it inhibits racemization reaction.
- a base is also required to remove acid generated during the reaction.
- Said base includes triethylamine or diisopropylethyl amine and preferred amount to use is in the range of 1 to 2 equivalents to 1 equivalent to ketone.
- Reaction solvent is not limited but it is preferred to use methylene chloride, toluene, benzene, or hexane because a solvent commonly affects production yield in enzymatic catalysis reaction.
- An amount of said solvent is used to be 0.2 to 0.3 M concentration of a ketone.
- a chiral ester expressed in formula 100 is obtained by reacting a ketone, a ruthenium complex, a lipase, and an acyl donor compound in the presence of hydride donor,
- R 1 , R 2 and R 3 are, independently, optionally substituted alkyl, optionally substituted aryl or optionally substituted cycloalkyl group and R 1 and R 2 , R 1 and R 3 , and R 2 and R 3 can be cyclized each other, where said substituent of alkyl, aryl and cycloalkyl is a hetero atom such as a halogen atom and a cyano group.
- the chiral ester of formula 100 of the present invention can be used as a synthetic intermediate for preparing various chiral compounds, chiral pharmaceutical drugs or chiral agrochemicals and more particularly, used as an essential intermediate for preparing Atorvastatin expressed in formula 101 which is a useful drug for treatment for hyperlipemia, L-Carnitine expressed in formula 102 which is as an additive used in food and drugs, and Agenerase expressed in formula 103 which is an essential intermediate of AIDS drug.
- a chiral compound of formula 100a which is one of the compounds of the present invention is a key intermediate for preparing Atorvastatin of formula 101 disclosed in US Patent No. 5,908,953,
- R is a low alkyl group
- the process for preparing a chiral ester of formula 100 of the present invention provides minimum production of by-products such as unreacted alcohol residue up to less than 5% and maximum production of product up to 100% having a high optical purity of 99% or more. Because optical purity is the most important factor in preparing chiral compounds for food and pharmaceutical drugs, the chiral ester of the present invention can be used as a useful starting material in various fields, especially fine chemical field.
- the following examples are intended to be illustrative of the present invention and should not be construed as limiting the scope of this invention defined by the appended claims.
- Example 1 A ketone of formula 4a(0.25mmol), triethylamine(0.75mmol), ruthenium complex of formula 5(0.0130mmol), where X is Cl, 2,6-dimethylheptan-4- ol(0.38mmol), and 20mg of lipase PS-C(Amano Company) were added to 2.0ml of methylene chloride. The reaction mixture was stirred for 5 min at room temperature and p-chlorophenyl acetate(0.75mmol) was added thereto to give a dark redish suspension.
- Argon gas was purged into the reaction suspension, after removing an oxygen under the vacuum condition and then the suspension was heated at 50 ° C for 78 hours.
- a ketone of formula 4a(0.25mmol), ruthenium complex of formula 3(0.050mmol), 2,6-dimethylheptan-4-ol(0.38mmol), 7.5mg of Nozyme 435 and p- chlorophenyl acetate(0.75mmol) were added to 0.8ml of toluene to give a yellow suspension.
- Argon gas was purged into the reaction suspension, after removing an oxygen under the vacuum condition and then the suspension was heated at 70 ° C for 44 hours.
- examples 1 to 5 and examples 11 to 17 to prepare chiral esters formation of an alcohol as a by-product, yield of chiral acetates, and optical purity were determined and tabled in Table 1. Said yields of an alcohol and chiral acetate were analyzed by gas chromatography, and said optical purity was determined by high performance liquid chromatography. Said gas chromatography used was Hewlett Packard 5890 Series II and said high performance liquid chromatography was SpectraSystem P2000.
- examples 1 to 5 and examples 11 to 17 proved that the present invention provides one-step synthesis for preparing an optically pure chiral ester form a ketone by controlling ruthenium complex to activate racemization and hydrogen transfer and lipase to activate esterification. Further, it provides high formation of the product, chiral ester, having less than 5% of unreacted alcohols.
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- Organic Chemistry (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Zoology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Microbiology (AREA)
- General Chemical & Material Sciences (AREA)
- Biotechnology (AREA)
- Health & Medical Sciences (AREA)
- Biochemistry (AREA)
- Bioinformatics & Cheminformatics (AREA)
- General Engineering & Computer Science (AREA)
- General Health & Medical Sciences (AREA)
- Genetics & Genomics (AREA)
- Preparation Of Compounds By Using Micro-Organisms (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU10589/01A AU1058901A (en) | 1999-10-18 | 2000-10-18 | Method for preparing chiral ester |
JP2001531776A JP2003512035A (en) | 1999-10-18 | 2000-10-18 | Method for producing chiral ester |
CA002387950A CA2387950A1 (en) | 1999-10-18 | 2000-10-18 | Method for preparing chiral ester |
EP00971840A EP1226105A4 (en) | 1999-10-18 | 2000-10-18 | Method for preparing chiral ester |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1999/45041 | 1999-10-18 | ||
KR19990045041 | 1999-10-18 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2001028971A1 true WO2001028971A1 (en) | 2001-04-26 |
Family
ID=19615712
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/KR2000/001171 WO2001028971A1 (en) | 1999-10-18 | 2000-10-18 | Method for preparing chiral ester |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP1226105A4 (en) |
JP (1) | JP2003512035A (en) |
KR (1) | KR100402049B1 (en) |
CN (1) | CN1379753A (en) |
AU (1) | AU1058901A (en) |
CA (1) | CA2387950A1 (en) |
WO (1) | WO2001028971A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7316986B2 (en) | 2003-06-19 | 2008-01-08 | Elop Electro-Optics Industries Ltd. | Glass ceramics for laser systems |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0375417A2 (en) * | 1988-12-22 | 1990-06-27 | Takasago International Corporation | Process for preparing optically active carnitine ester |
EP0992481A1 (en) * | 1998-10-02 | 2000-04-12 | Basf Aktiengesellschaft | Process for the asymmetric hydrogenation of beta-ketoesters |
-
2000
- 2000-10-18 JP JP2001531776A patent/JP2003512035A/en active Pending
- 2000-10-18 EP EP00971840A patent/EP1226105A4/en not_active Withdrawn
- 2000-10-18 CA CA002387950A patent/CA2387950A1/en not_active Abandoned
- 2000-10-18 AU AU10589/01A patent/AU1058901A/en not_active Abandoned
- 2000-10-18 CN CN00814419A patent/CN1379753A/en active Pending
- 2000-10-18 KR KR10-2000-0061351A patent/KR100402049B1/en not_active IP Right Cessation
- 2000-10-18 WO PCT/KR2000/001171 patent/WO2001028971A1/en not_active Application Discontinuation
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0375417A2 (en) * | 1988-12-22 | 1990-06-27 | Takasago International Corporation | Process for preparing optically active carnitine ester |
EP0992481A1 (en) * | 1998-10-02 | 2000-04-12 | Basf Aktiengesellschaft | Process for the asymmetric hydrogenation of beta-ketoesters |
Non-Patent Citations (5)
Title |
---|
DUSIN HSEK ET AL.: "Novel synthetic routes to several new, differentially substituted ruthenium tris(4-4'-disubstituted-2,2-bipyridine) complexes", AMERICAN CHEMICAL SOCIETY, vol. 39, no. 2, 2000, pages 308 - 316, XP002956926, DOI: doi:10.1021/ic990840i * |
FUJII AKIO ET AL.: "Ruthenium(2)-catalyzed asymmetric transfer hydrogenation of ketones using a formic acid-triethylamine mixture", AMERICAN CHEMICAL SOCIETY, vol. 110, no. 10, 1996, pages 2521 - 2522 * |
MUSUTANI K. ET AL.: "Catalytic asymmetric and chemoselective aerobic oxidation: Kinetic resolution of sec-alcohols", TETRAHEDRON LETTERS, vol. 41, no. 26, 2000, pages 5119 - 5123 * |
NORIKO DODO ET AL.: "Synthesis of ruthenium complexes with planar-chiral cyclopentadienyl-pyridine or -phosphine bidentate ligands", DALTON, ROYAL SOCIETY OF CHEMISTRY, vol. 1, 2000, pages 35 - 41, XP002956927 * |
See also references of EP1226105A4 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7316986B2 (en) | 2003-06-19 | 2008-01-08 | Elop Electro-Optics Industries Ltd. | Glass ceramics for laser systems |
Also Published As
Publication number | Publication date |
---|---|
KR100402049B1 (en) | 2003-10-17 |
AU1058901A (en) | 2001-04-30 |
CA2387950A1 (en) | 2001-04-26 |
EP1226105A4 (en) | 2004-11-03 |
JP2003512035A (en) | 2003-04-02 |
KR20010040122A (en) | 2001-05-15 |
CN1379753A (en) | 2002-11-13 |
EP1226105A1 (en) | 2002-07-31 |
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