EP1305287A1 - ENANTIOMERENTRENNUNG VON PIPERIDON-DERIVATEN UNTER GLEICHZEITIGER $i(IN SITU) RACEMISIERUNG DES UNERWÜNSCHTEN ENANTIOMERS - Google Patents
ENANTIOMERENTRENNUNG VON PIPERIDON-DERIVATEN UNTER GLEICHZEITIGER $i(IN SITU) RACEMISIERUNG DES UNERWÜNSCHTEN ENANTIOMERSInfo
- Publication number
- EP1305287A1 EP1305287A1 EP01949395A EP01949395A EP1305287A1 EP 1305287 A1 EP1305287 A1 EP 1305287A1 EP 01949395 A EP01949395 A EP 01949395A EP 01949395 A EP01949395 A EP 01949395A EP 1305287 A1 EP1305287 A1 EP 1305287A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- enantiomer
- acid
- piperidone
- solution
- alkyl
- 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- Withdrawn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
- XUWHAWMETYGRKB-UHFFFAOYSA-N piperidin-2-one Chemical class O=C1CCCCN1 XUWHAWMETYGRKB-UHFFFAOYSA-N 0.000 title claims abstract description 28
- 238000000926 separation method Methods 0.000 title claims abstract description 12
- 230000006340 racemization Effects 0.000 title abstract description 9
- 238000011065 in-situ storage Methods 0.000 title abstract description 4
- 238000000034 method Methods 0.000 claims abstract description 31
- WEVYAHXRMPXWCK-UHFFFAOYSA-N Acetonitrile Chemical compound CC#N WEVYAHXRMPXWCK-UHFFFAOYSA-N 0.000 claims description 30
- 150000003839 salts Chemical class 0.000 claims description 14
- 238000006243 chemical reaction Methods 0.000 claims description 11
- 239000000203 mixture Substances 0.000 claims description 11
- 150000007524 organic acids Chemical class 0.000 claims description 10
- 239000002904 solvent Substances 0.000 claims description 10
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 9
- 239000002253 acid Substances 0.000 claims description 8
- -1 methoxy, ethoxy, isopropyloxy Chemical group 0.000 claims description 8
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims description 7
- 238000002425 crystallisation Methods 0.000 claims description 6
- 230000008025 crystallization Effects 0.000 claims description 6
- 125000000217 alkyl group Chemical group 0.000 claims description 5
- 230000003197 catalytic effect Effects 0.000 claims description 5
- 229910052736 halogen Inorganic materials 0.000 claims description 5
- FEWJPZIEWOKRBE-JCYAYHJZSA-N Dextrotartaric acid Chemical compound OC(=O)[C@H](O)[C@@H](O)C(O)=O FEWJPZIEWOKRBE-JCYAYHJZSA-N 0.000 claims description 4
- 125000004432 carbon atom Chemical group C* 0.000 claims description 4
- 150000002367 halogens Chemical class 0.000 claims description 4
- 239000002244 precipitate Substances 0.000 claims description 4
- MIOPJNTWMNEORI-GMSGAONNSA-N (S)-camphorsulfonic acid Chemical compound C1C[C@@]2(CS(O)(=O)=O)C(=O)C[C@@H]1C2(C)C MIOPJNTWMNEORI-GMSGAONNSA-N 0.000 claims description 3
- 125000004204 2-methoxyphenyl group Chemical group [H]C1=C([H])C(*)=C(OC([H])([H])[H])C([H])=C1[H] 0.000 claims description 3
- LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 claims description 3
- 125000003118 aryl group Chemical group 0.000 claims description 3
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 claims description 3
- 125000005843 halogen group Chemical group 0.000 claims description 3
- 125000001072 heteroaryl group Chemical group 0.000 claims description 3
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 3
- FEWJPZIEWOKRBE-UHFFFAOYSA-N Tartaric acid Natural products [H+].[H+].[O-]C(=O)C(O)C(O)C([O-])=O FEWJPZIEWOKRBE-UHFFFAOYSA-N 0.000 claims description 2
- 238000002955 isolation Methods 0.000 claims description 2
- 235000002906 tartaric acid Nutrition 0.000 claims description 2
- 239000011975 tartaric acid Substances 0.000 claims description 2
- 125000002023 trifluoromethyl group Chemical group FC(F)(F)* 0.000 claims description 2
- 125000004916 (C1-C6) alkylcarbonyl group Chemical group 0.000 claims 1
- LBLYYCQCTBFVLH-UHFFFAOYSA-N 2-Methylbenzenesulfonic acid Chemical compound CC1=CC=CC=C1S(O)(=O)=O LBLYYCQCTBFVLH-UHFFFAOYSA-N 0.000 claims 1
- KMGUEILFFWDGFV-UHFFFAOYSA-N 2-benzoyl-2-benzoyloxy-3-hydroxybutanedioic acid Chemical compound C=1C=CC=CC=1C(=O)C(C(C(O)=O)O)(C(O)=O)OC(=O)C1=CC=CC=C1 KMGUEILFFWDGFV-UHFFFAOYSA-N 0.000 claims 1
- 238000003916 acid precipitation Methods 0.000 claims 1
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 9
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- CMIBUZBMZCBCAT-HOTGVXAUSA-N (2s,3s)-2,3-bis[(4-methylbenzoyl)oxy]butanedioic acid Chemical compound C1=CC(C)=CC=C1C(=O)O[C@H](C(O)=O)[C@@H](C(O)=O)OC(=O)C1=CC=C(C)C=C1 CMIBUZBMZCBCAT-HOTGVXAUSA-N 0.000 description 4
- JUJWROOIHBZHMG-UHFFFAOYSA-N Pyridine Chemical compound C1=CC=NC=C1 JUJWROOIHBZHMG-UHFFFAOYSA-N 0.000 description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 3
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 239000013078 crystal Substances 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- YONLFQNRGZXBBF-ZIAGYGMSSA-N (2r,3r)-2,3-dibenzoyloxybutanedioic acid Chemical compound O([C@@H](C(=O)O)[C@@H](OC(=O)C=1C=CC=CC=1)C(O)=O)C(=O)C1=CC=CC=C1 YONLFQNRGZXBBF-ZIAGYGMSSA-N 0.000 description 2
- YONLFQNRGZXBBF-KBPBESRZSA-N (2s,3s)-2,3-dibenzoyloxybutanedioic acid Chemical compound O([C@H](C(=O)O)[C@H](OC(=O)C=1C=CC=CC=1)C(O)=O)C(=O)C1=CC=CC=C1 YONLFQNRGZXBBF-KBPBESRZSA-N 0.000 description 2
- WMJNKBXKYHXOHC-UHFFFAOYSA-N 2,3-dihydroxy-2,3-bis(2-methylbenzoyl)butanedioic acid Chemical compound CC1=CC=CC=C1C(=O)C(O)(C(O)=O)C(O)(C(O)=O)C(=O)C1=CC=CC=C1C WMJNKBXKYHXOHC-UHFFFAOYSA-N 0.000 description 2
- YLQBMQCUIZJEEH-UHFFFAOYSA-N Furan Chemical compound C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 2
- DKGAVHZHDRPRBM-UHFFFAOYSA-N Tert-Butanol Chemical compound CC(C)(C)O DKGAVHZHDRPRBM-UHFFFAOYSA-N 0.000 description 2
- 239000002585 base Substances 0.000 description 2
- DKPFZGUDAPQIHT-UHFFFAOYSA-N butyl acetate Chemical compound CCCCOC(C)=O DKPFZGUDAPQIHT-UHFFFAOYSA-N 0.000 description 2
- 150000001721 carbon Chemical group 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- UAEPNZWRGJTJPN-UHFFFAOYSA-N methylcyclohexane Chemical compound CC1CCCCC1 UAEPNZWRGJTJPN-UHFFFAOYSA-N 0.000 description 2
- 239000012452 mother liquor Substances 0.000 description 2
- 125000001624 naphthyl group Chemical group 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000012071 phase Substances 0.000 description 2
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 2
- BDERNNFJNOPAEC-UHFFFAOYSA-N propan-1-ol Chemical compound CCCO BDERNNFJNOPAEC-UHFFFAOYSA-N 0.000 description 2
- UMJSCPRVCHMLSP-UHFFFAOYSA-N pyridine Natural products COC1=CC=CN=C1 UMJSCPRVCHMLSP-UHFFFAOYSA-N 0.000 description 2
- 229940095064 tartrate Drugs 0.000 description 2
- JOXIMZWYDAKGHI-UHFFFAOYSA-N toluene-4-sulfonic acid Chemical compound CC1=CC=C(S(O)(=O)=O)C=C1 JOXIMZWYDAKGHI-UHFFFAOYSA-N 0.000 description 2
- KXBPUMSPCLLXRZ-UHFFFAOYSA-N 3,3-dimethylpiperidin-4-one Chemical class CC1(C)CNCCC1=O KXBPUMSPCLLXRZ-UHFFFAOYSA-N 0.000 description 1
- 201000006474 Brain Ischemia Diseases 0.000 description 1
- WKBOTKDWSSQWDR-UHFFFAOYSA-N Bromine atom Chemical compound [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 description 1
- CPELXLSAUQHCOX-UHFFFAOYSA-N Hydrogen bromide Chemical compound Br CPELXLSAUQHCOX-UHFFFAOYSA-N 0.000 description 1
- 125000002252 acyl group Chemical group 0.000 description 1
- 125000004448 alkyl carbonyl group Chemical group 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 125000003236 benzoyl group Chemical group [H]C1=C([H])C([H])=C(C([H])=C1[H])C(*)=O 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 210000004556 brain Anatomy 0.000 description 1
- GDTBXPJZTBHREO-UHFFFAOYSA-N bromine Substances BrBr GDTBXPJZTBHREO-UHFFFAOYSA-N 0.000 description 1
- 229910052794 bromium Inorganic materials 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000012043 crude product Substances 0.000 description 1
- 238000006345 epimerization reaction Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 239000012458 free base Substances 0.000 description 1
- 125000005842 heteroatom Chemical group 0.000 description 1
- 125000000623 heterocyclic group Chemical group 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
- 239000012442 inert solvent Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000000543 intermediate Substances 0.000 description 1
- 125000001449 isopropyl group Chemical group [H]C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 125000000956 methoxy group Chemical group [H]C([H])([H])O* 0.000 description 1
- GYNNXHKOJHMOHS-UHFFFAOYSA-N methyl-cycloheptane Natural products CC1CCCCCC1 GYNNXHKOJHMOHS-UHFFFAOYSA-N 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 125000002950 monocyclic group Chemical group 0.000 description 1
- 208000010125 myocardial infarction Diseases 0.000 description 1
- 125000004108 n-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 125000001280 n-hexyl group Chemical group C(CCCCC)* 0.000 description 1
- 125000000740 n-pentyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 125000004123 n-propyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 230000004770 neurodegeneration Effects 0.000 description 1
- 208000015122 neurodegenerative disease Diseases 0.000 description 1
- 238000005580 one pot reaction Methods 0.000 description 1
- 235000005985 organic acids Nutrition 0.000 description 1
- 239000012074 organic phase Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- LEVJVKGPFAQPOI-UHFFFAOYSA-N phenylmethanone Chemical group O=[C]C1=CC=CC=C1 LEVJVKGPFAQPOI-UHFFFAOYSA-N 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 125000006413 ring segment Chemical group 0.000 description 1
- 239000011877 solvent mixture Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 150000003892 tartrate salts Chemical class 0.000 description 1
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D211/00—Heterocyclic compounds containing hydrogenated pyridine rings, not condensed with other rings
- C07D211/04—Heterocyclic compounds containing hydrogenated pyridine rings, not condensed with other rings with only hydrogen or carbon atoms directly attached to the ring nitrogen atom
- C07D211/68—Heterocyclic compounds containing hydrogenated pyridine rings, not condensed with other rings with only hydrogen or carbon atoms directly attached to the ring nitrogen atom having one double bond between ring members or between a ring member and a non-ring member
- C07D211/72—Heterocyclic compounds containing hydrogenated pyridine rings, not condensed with other rings with only hydrogen or carbon atoms directly attached to the ring nitrogen atom having one double bond between ring members or between a ring member and a non-ring member with hetero atoms or with carbon atoms having three bonds to hetero atoms, with at the most one bond to halogen, directly attached to ring carbon atoms
- C07D211/74—Oxygen atoms
Definitions
- the invention relates to a process which can be used on an industrial scale for the dynamic enantiomer separation of piperidone derivatives of the general formula (1)
- R 1 , R 2 R 3 and n can have the meaning given in the description and the claims, with simultaneous in situ racemization of the unreacted enantiomer.
- R 2 and R 3 each represent a methyl group
- R 4 is hydrogen, C 1 -C 6 -alkyl, halogen, hydroxy, a benzoyl radical bonded via oxygen or an alkylcarbonyl radical having a straight-chain or branched lower alkyl radical having 1 to 6 carbon atoms, the alkyl radical optionally being substituted by one or more halogen atoms which may be identical or different from one another, nitro , Cyano, amino, mono- or disubstituted amino with CC 8 -alkyl, where the alkyl radicals can be the same or different, -NH-acyl- (CC 8 -alkyl), wherein acyl is benzoyl or an alkylcarbonyl radical with a straight-chain or branched lower alkyl radical has 1 to 6 carbon atom (s), the alkyl radical optionally having one or more halogen atom (s) which may be identical or different from one another, may be substituted, or a radical which can be converted into one of the radicals listed above by simple
- benzomorphane derivatives which e.g. can be used in the treatment of neurodegenerative diseases and brain ischemia, such as heart attack or brain stroke.
- German published patent application DE 195 28 472 describes a process which is essential for the invention, in which the desired enantiomer is obtained from the solution of a mixture of enantiomeric 3,3-dimethyl-4-piperidones by reaction with a suitable organic acid, e.g. Tartaric acid, as salt, e.g. as tartrate, fails.
- a suitable organic acid e.g. Tartaric acid
- salt e.g. as tartrate
- the present invention therefore aims at a process for the enantiomer separation of piperidone derivatives of the general formula (1)
- Rt is C 1 -C 8 alkyl, preferably C r C 6 alkyl, which can be straight-chain or branched and is optionally mono- to polysubstituted, aryl, which can be mono- or polysubstituted, preferably optionally substituted Phenyl or naphthyl, particularly preferably a radical of the general formula
- heteroaryl preferably pyridine, where the heterocycle with one to
- Ring belonging carbon atom or originating from the methylene bridge is linked to the chiral center, R 2 and R 3 , which may be the same or different, CC 6 alkyl, which may be straight-chain or branched, preferably methyl or ethyl, particularly preferably methyl; R 4 independently of one another methoxy, ethoxy, isopropyloxy, halogen, hydroxy, CC 6 alkyl, which can be partially or completely halogenated, such as trifluoromethyl, amino, nitro, cyano, benzoyl, CC 6 alkyl carbonyl, preferably methoxy; n denotes 0, 1, 2 or 3, preferably 1, and m denotes 0, 1, 2 or 3, preferably 0 or 1,
- a solution of an optically active organic acid optionally with the addition of catalytic amounts of a sulfonic acid, e.g. Toluene or camphorsulfonic acid, presented at a certain temperature in a suitable solvent.
- a solution of the enantiomer mixture of the piperidone derivative (1) is slowly added to this temperature-controlled solution.
- the optically active organic acid, the solvent or solvent mixture and also the reaction temperature are selected such that the desired enantiomer of the piperidone derivative (1) crystallizes out as the salt of the optically active acid, while the other enantiomer remains dissolved and racemizes under the reaction conditions.
- the desired enantiomer is continuously simulated and precipitated in a dynamic process until equilibrium is established.
- the process according to the invention for dynamic enantiomer separation of piperidone derivatives is thus characterized in that a) an optically active acid and, if appropriate, catalytic amounts of a sulfonic acid are dissolved in a suitable solvent and the temperature of this solution is controlled, b) a solution of the piperidone is slowly added to this solution.
- a) an optically active acid and, if appropriate, catalytic amounts of a sulfonic acid are dissolved in a suitable solvent and the temperature of this solution is controlled
- a solution of the piperidone is slowly added to this solution.
- Derivative metered in so that the desired enantiomer crystallizes out as a salt of the organic acid used while at the same time the undesired isomer racemizes in solution and the portion of the desired enantiomer thus formed likewise precipitates as a salt in a dynamic process
- the salt of the desired enantiomer Termination of the crystallization is thus characterized in that a)
- Suitable organic acids for precipitating the desired enantiomer are (+) - or (-) - ditoluoyl tartaric acid or (+) - or (-) - dibenzoyl tartaric acid.
- the reaction is optionally carried out in the presence of catalytic amounts of p-toluenesulfonic acid or camphorsulfonic acid.
- the reaction can be carried out, for example, in solvents such as acetone, acetonitrile, methanol, ethanol, n-propanol, isopropanol, tert-butanol, ethyl acetate, water, toluene, methylcyclohexane, n-butyl acetate or mixtures thereof.
- solvents such as acetone, acetonitrile, methanol, ethanol, n-propanol, isopropanol, tert-butanol, ethyl acetate, water, toluene, methylcyclohexane, n-butyl acetate or mixtures thereof.
- Acetonitrile or acetone are preferably used.
- (+) - piperidone (1a) is precipitated and thus enriched, for example, by the reaction with (+) - ditoluoyl tartaric acid or (+) - dibenzoyl tartaric acid.
- (+) - ditoluoyl-tartaric acid or (+) - dibenzoyl-tartaric acid gives the opposite enantiomer, namely the (-) - piperidone (1 b).
- R 2 and R 3 each denote methyl and n 1, characterized in that the desired (R) - (+) - enantiomer is precipitated as the salt thereof by reaction with (+) - ditoluoyltartaric acid and at the same time in the dissolved (S) - (- ) Enantiomeric epimerization of the chiral center takes place by heating to a temperature of approximately 30-75 ° C, particularly preferably to 50-65 ° C. Acetonitrile, acetone or mixtures thereof, preferably acetonitrile, can be used as the solvent.
- Also preferred according to the invention is a process which leads to a piperidone of the general formula (1a) or (1b) with an enantiomeric excess of> 95% ee, particularly preferably of> 97% ee.
- a mixture of the enantiomeric piperidone derivatives of the general formula (1) is in an inert solvent, e.g. Acetonitrile, dissolved and slowly added to a solution of a suitable tartaric acid derivative, preferably (+) - ditoluoyltartaric acid, preheated to about 35 to 75 ° C., preferably to 50 to 65 ° C., in the same solvent.
- a suitable tartaric acid derivative preferably (+) - ditoluoyltartaric acid
- the mixture is stirred at the same temperature for a further 0.5 to 36 hours until no more precipitate appears to form.
- the crystals are filtered off with suction and the residue is washed with the cold solvent.
- the desired enantiomer is obtained in the form of the salt of the organic acid, from which the base can be released with the aid of known processes.
- the acid can be recovered in very good yields by simple extraction.
- the enantiomer separation of piperidone derivatives according to the invention by crystallization with simultaneous racemization of the undesired enantiomer can start from the free base of the formula (1), which can also be used as an up to 20% contaminated crude product, or from an acid addition salt precipitated for purification with a Mineral acid, such as a hydrochloride or hydrobromide, are carried out after the base has been released.
- a Mineral acid such as a hydrochloride or hydrobromide
- Alkyl means, both when it is alone and in combination with other radicals, a straight-chain or branched alkyl radical with the specified number of carbon atoms, such as eg Methyl, ethyl, n-propyl, isopropyl, n-butyl, tert-butyl, n-pentyl or n-hexyl.
- Aryl means an aromatic hydrocarbon radical with up to 10 carbon atoms, such as phenyl or naphthyl; Heteroaryl stands for a mono- or bicyclic aromatic radical with up to 10 ring atoms which, in addition to carbon, has one or more heteroatoms which are selected independently of one another from the group formed by N, O and S, e.g. Pyridine or furan.
- Halogen means fluorine, chlorine or bromine.
- 150 g (0.53 mol) of 2 - (- methoxyphenyl) methyl-3,3-dimethyl-4-piperidonium hydrochloride are first added to 320 ml of water. After adding 150 ml of toluene, a pH of 12.8 is set using 47.5 ml (0.53 mol) of sodium hydroxide solution (45% in water). The mixture is stirred with thorough mixing of the phases at room temperature for about 40 minutes, allowed to settle and the water phase is separated off. The organic phase is washed with 40 ml of water and then concentrated to dryness.
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Hydrogenated Pyridines (AREA)
- Plural Heterocyclic Compounds (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10029851A DE10029851A1 (de) | 2000-06-16 | 2000-06-16 | Enantiomerentrennung von Piperidon-Derivaten unter gleichzeitiger in situ Racemisierung des unerwünschten Enantiomers |
| DE10029851 | 2000-06-16 | ||
| PCT/EP2001/006552 WO2001096306A1 (de) | 2000-06-16 | 2001-06-09 | Enantiomerentrennung von piperidon-derivaten unter gleichzeitiger in situ racemisierung des unerwünschten enantiomers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP1305287A1 true EP1305287A1 (de) | 2003-05-02 |
Family
ID=7646064
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP01949395A Withdrawn EP1305287A1 (de) | 2000-06-16 | 2001-06-09 | ENANTIOMERENTRENNUNG VON PIPERIDON-DERIVATEN UNTER GLEICHZEITIGER $i(IN SITU) RACEMISIERUNG DES UNERWÜNSCHTEN ENANTIOMERS |
Country Status (10)
| Country | Link |
|---|---|
| EP (1) | EP1305287A1 (de) |
| JP (1) | JP2004503539A (de) |
| KR (1) | KR100863922B1 (de) |
| AR (1) | AR028957A1 (de) |
| AU (1) | AU2001270563A1 (de) |
| CA (1) | CA2409614C (de) |
| DE (1) | DE10029851A1 (de) |
| IL (2) | IL153085A0 (de) |
| MX (1) | MXPA02012301A (de) |
| WO (1) | WO2001096306A1 (de) |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0736724B2 (ja) * | 1992-08-07 | 1995-04-26 | 株式会社スリオンテック | 紫外線硬化型粘着剤を用いた播種育苗シート及びその製造方法 |
| CA2200490C (en) * | 1994-09-23 | 2007-01-09 | Chiroscience Limited | Racemisation and asymmetric transformation processes used in the manufacture of levobupivacaine and analogues thereof |
| DE19528472A1 (de) * | 1995-08-03 | 1997-02-06 | Boehringer Ingelheim Kg | Neues Verfahren zur Herstellung von Norbenzomorphan einer Zwischenstufe bei Herstellung von pharmazeutisch wertvollen Benzomorphanderivaten, insbesondere von (-)-(1R,5S,S"R)-3'-Hydroxy-2-(2-methoxypropyl-)-5,9,9-trimethyl-6,7 benzomorphan |
-
2000
- 2000-06-16 DE DE10029851A patent/DE10029851A1/de not_active Ceased
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2001
- 2001-06-09 JP JP2002510449A patent/JP2004503539A/ja active Pending
- 2001-06-09 KR KR1020027016915A patent/KR100863922B1/ko not_active Expired - Fee Related
- 2001-06-09 EP EP01949395A patent/EP1305287A1/de not_active Withdrawn
- 2001-06-09 CA CA 2409614 patent/CA2409614C/en not_active Expired - Fee Related
- 2001-06-09 IL IL15308501A patent/IL153085A0/xx active IP Right Grant
- 2001-06-09 WO PCT/EP2001/006552 patent/WO2001096306A1/de not_active Ceased
- 2001-06-09 MX MXPA02012301A patent/MXPA02012301A/es active IP Right Grant
- 2001-06-09 AU AU2001270563A patent/AU2001270563A1/en not_active Abandoned
- 2001-06-15 AR ARP010102869A patent/AR028957A1/es unknown
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2002
- 2002-11-26 IL IL153085A patent/IL153085A/en not_active IP Right Cessation
Non-Patent Citations (1)
| Title |
|---|
| See references of WO0196306A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| MXPA02012301A (es) | 2003-04-25 |
| WO2001096306A1 (de) | 2001-12-20 |
| DE10029851A1 (de) | 2001-12-20 |
| KR20030016288A (ko) | 2003-02-26 |
| KR100863922B1 (ko) | 2008-10-17 |
| AU2001270563A1 (en) | 2001-12-24 |
| IL153085A0 (en) | 2003-06-24 |
| JP2004503539A (ja) | 2004-02-05 |
| AR028957A1 (es) | 2003-05-28 |
| IL153085A (en) | 2008-11-26 |
| CA2409614C (en) | 2008-08-05 |
| CA2409614A1 (en) | 2001-12-20 |
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