WO2014097306A1 - Stable and pure polymorphic form of bortezomib - Google Patents
Stable and pure polymorphic form of bortezomib Download PDFInfo
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- WO2014097306A1 WO2014097306A1 PCT/IN2012/000838 IN2012000838W WO2014097306A1 WO 2014097306 A1 WO2014097306 A1 WO 2014097306A1 IN 2012000838 W IN2012000838 W IN 2012000838W WO 2014097306 A1 WO2014097306 A1 WO 2014097306A1
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- Prior art keywords
- bortezomib
- polymorphic form
- solid
- stable
- polymorphic
- Prior art date
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- GXJABQQUPOEUTA-RDJZCZTQSA-N bortezomib Chemical compound C([C@@H](C(=O)N[C@@H](CC(C)C)B(O)O)NC(=O)C=1N=CC=NC=1)C1=CC=CC=C1 GXJABQQUPOEUTA-RDJZCZTQSA-N 0.000 title claims abstract description 63
- 229960001467 bortezomib Drugs 0.000 title claims abstract description 60
- 238000000034 method Methods 0.000 claims abstract description 8
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 claims description 27
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 14
- IMNFDUFMRHMDMM-UHFFFAOYSA-N N-Heptane Chemical compound CCCCCCC IMNFDUFMRHMDMM-UHFFFAOYSA-N 0.000 claims description 14
- 239000000126 substance Substances 0.000 claims description 14
- 239000007787 solid Substances 0.000 claims description 12
- 238000000634 powder X-ray diffraction Methods 0.000 claims description 10
- 238000001938 differential scanning calorimetry curve Methods 0.000 claims description 5
- 239000012535 impurity Substances 0.000 claims description 5
- 238000001035 drying Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 238000001228 spectrum Methods 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 238000000862 absorption spectrum Methods 0.000 claims description 2
- 230000001747 exhibiting effect Effects 0.000 claims description 2
- 238000002386 leaching Methods 0.000 claims description 2
- 238000001914 filtration Methods 0.000 claims 2
- 238000002360 preparation method Methods 0.000 abstract description 8
- 208000034578 Multiple myelomas Diseases 0.000 abstract description 3
- 206010035226 Plasma cell myeloma Diseases 0.000 abstract description 3
- 208000025205 Mantle-Cell Lymphoma Diseases 0.000 abstract description 2
- 229940034982 antineoplastic agent Drugs 0.000 abstract description 2
- 239000002246 antineoplastic agent Substances 0.000 abstract description 2
- 239000002904 solvent Substances 0.000 description 13
- WEVYAHXRMPXWCK-UHFFFAOYSA-N Acetonitrile Chemical compound CC#N WEVYAHXRMPXWCK-UHFFFAOYSA-N 0.000 description 12
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 12
- 239000000047 product Substances 0.000 description 10
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 8
- 239000000243 solution Substances 0.000 description 7
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 6
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 description 6
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- 239000008186 active pharmaceutical agent Substances 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 6
- 150000001875 compounds Chemical class 0.000 description 6
- 239000010410 layer Substances 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- ZADPBFCGQRWHPN-UHFFFAOYSA-N boronic acid Chemical compound OBO ZADPBFCGQRWHPN-UHFFFAOYSA-N 0.000 description 5
- 229940126534 drug product Drugs 0.000 description 5
- 229940088679 drug related substance Drugs 0.000 description 5
- 238000004128 high performance liquid chromatography Methods 0.000 description 5
- 239000000825 pharmaceutical preparation Substances 0.000 description 5
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 4
- 238000002425 crystallisation Methods 0.000 description 4
- 230000008025 crystallization Effects 0.000 description 4
- 238000002329 infrared spectrum Methods 0.000 description 4
- 239000000725 suspension Substances 0.000 description 4
- 239000012317 TBTU Substances 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- CLZISMQKJZCZDN-UHFFFAOYSA-N [benzotriazol-1-yloxy(dimethylamino)methylidene]-dimethylazanium Chemical compound C1=CC=C2N(OC(N(C)C)=[N+](C)C)N=NC2=C1 CLZISMQKJZCZDN-UHFFFAOYSA-N 0.000 description 3
- 229940079593 drug Drugs 0.000 description 3
- 239000003814 drug Substances 0.000 description 3
- 238000001953 recrystallisation Methods 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- RYHBNJHYFVUHQT-UHFFFAOYSA-N 1,4-Dioxane Chemical compound C1COCCO1 RYHBNJHYFVUHQT-UHFFFAOYSA-N 0.000 description 2
- ZAZPDOYUCVFPOI-UHFFFAOYSA-N 2-methylpropylboronic acid Chemical compound CC(C)CB(O)O ZAZPDOYUCVFPOI-UHFFFAOYSA-N 0.000 description 2
- HEDRZPFGACZZDS-UHFFFAOYSA-N Chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 description 2
- QUSNBJAOOMFDIB-UHFFFAOYSA-N Ethylamine Chemical compound CCN QUSNBJAOOMFDIB-UHFFFAOYSA-N 0.000 description 2
- 239000004395 L-leucine Substances 0.000 description 2
- 229930195725 Mannitol Natural products 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- BRTALTYTFFNPAC-UHFFFAOYSA-N boroxin Chemical compound B1OBOBO1 BRTALTYTFFNPAC-UHFFFAOYSA-N 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 229960003136 leucine Drugs 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 239000000594 mannitol Substances 0.000 description 2
- 235000010355 mannitol Nutrition 0.000 description 2
- -1 mannitol ester Chemical class 0.000 description 2
- 239000012044 organic layer Substances 0.000 description 2
- 239000008194 pharmaceutical composition Substances 0.000 description 2
- NIPZZXUFJPQHNH-UHFFFAOYSA-N pyrazine-2-carboxylic acid Chemical compound OC(=O)C1=CN=CC=N1 NIPZZXUFJPQHNH-UHFFFAOYSA-N 0.000 description 2
- 238000013341 scale-up Methods 0.000 description 2
- 229910052938 sodium sulfate Inorganic materials 0.000 description 2
- 235000011152 sodium sulphate Nutrition 0.000 description 2
- 239000011877 solvent mixture Substances 0.000 description 2
- 230000001225 therapeutic effect Effects 0.000 description 2
- MOILFCKRQFQVFS-BDNRQGISSA-N (1r,3s,4r,5r)-4,6,6-trimethylbicyclo[3.1.1]heptane-3,4-diol Chemical group C1[C@@H]2C(C)(C)[C@H]1C[C@H](O)[C@@]2(O)C MOILFCKRQFQVFS-BDNRQGISSA-N 0.000 description 1
- GXJABQQUPOEUTA-RDJZCZTQSA-O CC(C)C[C@@H](B(O)[OH2+])NC([C@H](Cc1ccccc1)NC(c1nccnc1)=O)=O Chemical compound CC(C)C[C@@H](B(O)[OH2+])NC([C@H](Cc1ccccc1)NC(c1nccnc1)=O)=O GXJABQQUPOEUTA-RDJZCZTQSA-O 0.000 description 1
- XDTMQSROBMDMFD-UHFFFAOYSA-N Cyclohexane Chemical compound C1CCCCC1 XDTMQSROBMDMFD-UHFFFAOYSA-N 0.000 description 1
- FBPFZTCFMRRESA-KVTDHHQDSA-N D-Mannitol Chemical compound OC[C@@H](O)[C@@H](O)[C@H](O)[C@H](O)CO FBPFZTCFMRRESA-KVTDHHQDSA-N 0.000 description 1
- ZAFNJMIOTHYJRJ-UHFFFAOYSA-N Diisopropyl ether Chemical compound CC(C)OC(C)C ZAFNJMIOTHYJRJ-UHFFFAOYSA-N 0.000 description 1
- 238000004566 IR spectroscopy Methods 0.000 description 1
- 241000124008 Mammalia Species 0.000 description 1
- JGFZNNIVVJXRND-UHFFFAOYSA-N N,N-diisopropylethylamine Substances CCN(C(C)C)C(C)C JGFZNNIVVJXRND-UHFFFAOYSA-N 0.000 description 1
- PCNDJXKNXGMECE-UHFFFAOYSA-N Phenazine Natural products C1=CC=CC2=NC3=CC=CC=C3N=C21 PCNDJXKNXGMECE-UHFFFAOYSA-N 0.000 description 1
- 102000004245 Proteasome Endopeptidase Complex Human genes 0.000 description 1
- 108090000708 Proteasome Endopeptidase Complex Proteins 0.000 description 1
- 229940079156 Proteasome inhibitor Drugs 0.000 description 1
- KYQCOXFCLRTKLS-UHFFFAOYSA-N Pyrazine Natural products C1=CN=CC=N1 KYQCOXFCLRTKLS-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 239000012296 anti-solvent Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000012267 brine Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 239000006071 cream Substances 0.000 description 1
- 238000000113 differential scanning calorimetry Methods 0.000 description 1
- IIEWJVIFRVWJOD-UHFFFAOYSA-N ethyl cyclohexane Natural products CCC1CCCCC1 IIEWJVIFRVWJOD-UHFFFAOYSA-N 0.000 description 1
- 239000000706 filtrate Substances 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000008176 lyophilized powder Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000012299 nitrogen atmosphere Substances 0.000 description 1
- TYJJADVDDVDEDZ-UHFFFAOYSA-M potassium hydrogencarbonate Chemical compound [K+].OC([O-])=O TYJJADVDDVDEDZ-UHFFFAOYSA-M 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000003207 proteasome inhibitor Substances 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000013557 residual solvent Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 1
- 239000012453 solvate Substances 0.000 description 1
- 229940099039 velcade Drugs 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
- C07F5/00—Compounds containing elements of Groups 3 or 13 of the Periodic Table
- C07F5/02—Boron compounds
Definitions
- the present invention relates to a stable and pure polymorphic form of bortezomib and process for its preparation.
- Bortezomib is the adopted name for the drug compound having the chemical name [(1R)- 3-methyl-l-[[(2S)-l-oxo-3-phenyl-2-[(Pyrazinylcarbonyl)amino]propyl]amino]butyl] boronic acid and is represented by the structural formula 1.
- Bortezomib is an anti-neoplastic agent used in the treatment of multiple myeloma and mantle cell lymphoma. Bortezomib is the first therapeutic proteasome inhibitor to be tested in the humans it is introduced by Millennium Pharmaceuticals Inc., a U.S. based company. The brand name of bortezomib is VELCADE ® which is in the form of injection, each vial contains 3.5mg of bortezomib as sterile lyophilized powder.
- the lyophilized drug product contains mannitol in a ten fold excess by weight, and it is much more stable than the drug substance itself.
- the drug substance, drug product and the reconstituted drug product have three different molecular forms.
- Bortezomib drug substance exists as the trimeric boroxine in the solid state. When exposed to water, the boroxine hydrolyses to monomeric acid.
- the reconstituted drug product in 0.9% aqueous NaCl solution exists in equilibrium with the mannitol ester and the boronic acid.
- US 5,780,454 patent discloses bortezomib, its pharmaceutically acceptable salts, pharmaceutical composition and use to inhibit the proteasome function in a mammal. Further, it discloses a process for the preparation of bortezomib and its analogues. No polymorphic forms of bortezomib have been disclosed in this patent.
- WO 2009/036281 discloses Form A and Form B of bortezomib.
- Form A is obtained by from a solvent system of methanol and water and Form B is prepared by using solvent system of either ethyl acetate or dichloromethane mixed with toluene.
- These two polymorphic forms Form-A and Form-B of bortezomib are identical with Form-I and Form-II of bortezomib disclosed in our earlier patent application WO 2008/075376 Al .
- the chemical purity (by HPLC) of these Form A and Form B is in the range 99.0 to 99.6% only even after subjecting to repeated crystallizations and impurities are in the extent of 0.2 to 0.6% in the samples. This purity is not acceptable for pharmaceutical compositions and therapeutic applications to prepare a drug product.
- WO 2011/099018 discloses Form HI and also an amorphous form of bortezomib.
- Form HI of bortezomib is prepared by crystallization from acetonitrile.
- Amorphous form of bortezomib is obtained from a solvent mixture of dimethylformamide and water or by crystallization from the solvent mixture ethyl acetate and cyclohexane or heptane.
- WO 2011/107912 application discloses Form Al and Form A2 of bortezomib: Form Al is obtained from acetonitrile and Form A2 is prepared by recrystallization from solvent system of 1,4-dioxane and water. Both Form Al and Form A2 of bortezomib are characterized by their PXRD, IR spectra and DSC thermograms. 1,4-Dioxane is not suitable for pharmaceutical applications in the final stage as it is non-volatile and leaves considerable solvent residues in the finished product and the permissible limit is only 380 ppm.
- Polymorphic form-I is prepared by crystallization from acetone alone or dissolving bortezomib in solvents such as chloroform or acetonitrile and adding antisolvents like diisopropyl ether.
- Polymorphic form-II of bortezomib is obtained from recrystallization in ethyl acetate.
- the application also discloses the interconvertibility of the two forms.
- Polymorphic Form-I and Form-II are characterized by their PXRD, IR spectra and DSC thermograms.
- the present invention provides a novel crystal form of bortezomib designated as Form N.
- the novel polymorphic form N of bortezomib of the present invention is characterized by a) Peaks in the Powder X-ray diffraction spectrum (PXRD) having 2e values at about 3.6, 4.7, 5.5, 8.8, 9.3, 9.5, 1 1.1, 14.6, 15.5, 16.4, 16.7, 17.8, 18.5, 18.8, 19.5, 20.16, 20.46, 21.6 and 22.3 ⁇ 0.2 degrees.
- PXRD Powder X-ray diffraction spectrum
- the prevention invention provides a process for the preparation of polymorphic Form N of bortezomib having high chemical purity by the following synthetic scheme
- the process provides novel and chemically pure polymorphic form N of bortezomib and comprises, a) coupling of (lS,2S,3R,5S)-Pinanediol-P-(l-phenyl)-L-alanine-L-Leucine boronate HCI of formula 2 with with 2-Pyrazine carboxylic acid of formula 3 in the presence of TBTU and ⁇ , ⁇ -diisopropylethyl amine to get (IS, 2S,3R,5S)-Pinanediol-N-(2- Pyrazine carbonyl)-L-Phenylalanine-L-leucine boronate of formula 2 b) deprotecting of pinanediol moiety of compound of formula 3 using isobutyl boronic acid in the presence of aq.
- bortezomib (formula 1) c) crystallizing crude bortezomib from acetone at room temperature followed by recrystallization from ethyl acetate d) leaching the resulting product of step-c with n-heptane and drying at room temperature for 25-30h under high vacuum (750 mmHg) to afford of high chemical purity bortezomib (> 99.8%) containing total chemical and chiral impurities of less than 0.2%.
- FIG.1 Powder X-ray diffraction pattern of bortezomib polymorphic Form-N
- FIG.2 DSC thermogram of bortezomib polymorphic Form-N
- FIG.3 Infrared absorption spectrum of bortezomib polymorphic Form-N
- X-ray powder diffraction spectra were measured on a Siemens d5000 x-ray powder diffracto-meter having a copper-ka radiation (1.5406a).
- DSC data was collected from mettler toledo; model: DSC 823 e
- Bortezomib prepared according to the present invention is subjected for stability studies in both long term (-20 ⁇ 5°C) and accelerated (5 ⁇ 3°C) storage conditions. Compound is found to be stable for the testing period of six months. Bortezomib (Form-N) of 99.96 chemical purity and 99.99% chiral purity was used in these studies and the results are tabulated (Table- 1).
- Present invention discloses novel crystal form of bortezomib designated as Form-N which is stable, reproducible on larger scale runs, and useful for the treatment of multiple myeloma.
- Processes for the preparation of the novel crystalline form, namely Form-N of bortezomib is simple and easy to adopt on a commercial scale.
- Polymorphic Form-N of bortezomib obtained by the present invention is of high purity in terms of related substances as well as enantiomeric purity.
- Polymorphic Form-N of bortezomib retains the polymorphic integrity and chemical/chiral purity over a long period of time (6 months).
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
Abstract
The present invention relates to a stable and pure polymorphic form, designated as polymorphic form-N of bortezomib (1) and processes for the preparation of the same. Bortezomib is an anti-neoplastic agent used in the treatment of multiple myeloma and mantle cell lymphoma.
Description
STABLE AND PURE POLYMORPHIC FORM OF BORTEZOMIB
FIELD OF THE INVENTION
The present invention relates to a stable and pure polymorphic form of bortezomib and process for its preparation.
BACKGROUD OF THE INVENTION
Bortezomib is the adopted name for the drug compound having the chemical name [(1R)- 3-methyl-l-[[(2S)-l-oxo-3-phenyl-2-[(Pyrazinylcarbonyl)amino]propyl]amino]butyl] boronic acid and is represented by the structural formula 1.
Bortezomib is an anti-neoplastic agent used in the treatment of multiple myeloma and mantle cell lymphoma. Bortezomib is the first therapeutic proteasome inhibitor to be tested in the humans it is introduced by Millennium Pharmaceuticals Inc., a U.S. based company. The brand name of bortezomib is VELCADE® which is in the form of injection, each vial contains 3.5mg of bortezomib as sterile lyophilized powder.
The lyophilized drug product contains mannitol in a ten fold excess by weight, and it is much more stable than the drug substance itself. The drug substance, drug product and the reconstituted drug product have three different molecular forms. Bortezomib drug substance exists as the trimeric boroxine in the solid state. When exposed to water, the boroxine hydrolyses to monomeric acid. The reconstituted drug product in 0.9% aqueous NaCl solution exists in equilibrium with the mannitol ester and the boronic acid.
US 5,780,454 patent discloses bortezomib, its pharmaceutically acceptable salts, pharmaceutical composition and use to inhibit the proteasome function in a mammal. Further, it discloses a process for the preparation of bortezomib and its analogues. No polymorphic forms of bortezomib have been disclosed in this patent.
WO 2009/036281 discloses Form A and Form B of bortezomib. Form A is obtained by from a solvent system of methanol and water and Form B is prepared by using solvent system of either ethyl acetate or dichloromethane mixed with toluene. These two polymorphic forms Form-A and Form-B of bortezomib are identical with Form-I and Form-II of bortezomib disclosed in our earlier patent application WO 2008/075376 Al . The chemical purity (by HPLC) of these Form A and Form B is in the range 99.0 to 99.6% only even after subjecting to repeated crystallizations and impurities are in the extent of 0.2 to 0.6% in the samples. This purity is not acceptable for pharmaceutical compositions and therapeutic applications to prepare a drug product.
WO 2011/099018 discloses Form HI and also an amorphous form of bortezomib. Form HI of bortezomib is prepared by crystallization from acetonitrile. Amorphous form of bortezomib is obtained from a solvent mixture of dimethylformamide and water or by crystallization from the solvent mixture ethyl acetate and cyclohexane or heptane.
The above two forms were prepared only on 0.35g and 0.7g scale. Purity of the obtained product was not mentioned in this application. Solvents like acetonitrile, N,N-dimethyl formamide were employed for the preparation of both Form HI and amorphous form of bortezomib. These solvents have lower residual solvent limit as per ICH guide lines (410 ppm and 880 ppm respectively). Removal of these solvents requires higher temperatures at which bortezomib gets degraded resulting in a lower purity of the finished product. Incomplete removal of solvent can lead to solvate formation and is not suited for pharmaceutical applications.
WO 2011/107912 application discloses Form Al and Form A2 of bortezomib: Form Al is obtained from acetonitrile and Form A2 is prepared by recrystallization from solvent system of 1,4-dioxane and water. Both Form Al and Form A2 of bortezomib are characterized by their PXRD, IR spectra and DSC thermograms. 1,4-Dioxane is not suitable for pharmaceutical applications in the final stage as it is non-volatile and leaves considerable solvent residues in the finished product and the permissible limit is only 380 ppm.
In our earlier PCT application WO 2008/075376 two polymorphic forms of bortezomib were disclosed. Polymorphic form-I is prepared by crystallization from acetone alone or dissolving bortezomib in solvents such as chloroform or acetonitrile and adding antisolvents like diisopropyl ether. Polymorphic form-II of bortezomib is obtained from recrystallization in ethyl acetate. The application also discloses the interconvertibility of the two forms. Polymorphic Form-I and Form-II are characterized by their PXRD, IR spectra and DSC thermograms.
However during scale-up work on this drug substance it has been observed that these polymorphic forms I and II are not consistently reproducible particularly on batch sizes of 50g and above. Although the chemical purity is initially >99.8% the product was found to develop impurities on storage (purity < 99.5%).
SUMMARY OF THE INVENTION
There is a need to invent stable and reproduce polymorphic form of any pharmaceutical drug substance which has great impact on bioavailability of the drug.
Polymorphic form in the case of heat and moisture sensitive products like bortezomib has an impact on the chemical stability as well. A stable polymorph on a time scale of six months at specified temperature is essential to maintain the chemical purity of the drug substance (>99.5%).
There is thus a need to investigate the polymorphism of bortezomib with the following objectives:
A stable polymorph that remains stable over a period of time and reproducible on larger scale runs (50g and above).
A polymorph which is also chemically stable and retains the polymorphic integrity over a period of time. A polymorph which is chemically stable and retains the polymorphic integrity on scale- up.
Surprisingly, during the larger scale production of bortezomib (about 1 OOg scale) a new polymorphic form is obtained which is chemically pure, stable and reproducible.
1) In one aspect, the present invention provides a novel crystal form of bortezomib designated as Form N. The novel polymorphic form N of bortezomib of the present invention is characterized by a) Peaks in the Powder X-ray diffraction spectrum (PXRD) having 2e values at about 3.6, 4.7, 5.5, 8.8, 9.3, 9.5, 1 1.1, 14.6, 15.5, 16.4, 16.7, 17.8, 18.5, 18.8, 19.5, 20.16, 20.46, 21.6 and 22.3 ±0.2 degrees. b) Infrared absorption bands in the IR spectrum (KBr):
446, 511, 606, 701, 749, 870, 927, 1021, 1048, 1082, 1113, 1153, 1201, 1273, 1323, 1402, 1466, 1518, 1581, 1661, 2868, 2928, 2954, 3029, 3063, 3281 and 3391 crn 1 c) DSC thermogram exhibiting two endotherms between about 70°C and 95°C and about 125°C and 150°C.
2) In another aspect, the prevention invention provides a process for the preparation of polymorphic Form N of bortezomib having high chemical purity by the following synthetic scheme
Scheme
3) According to another aspect of the present invention, the process provides novel and chemically pure polymorphic form N of bortezomib and comprises, a) coupling of (lS,2S,3R,5S)-Pinanediol-P-(l-phenyl)-L-alanine-L-Leucine boronate HCI of formula 2 with with 2-Pyrazine carboxylic acid of formula 3 in the presence of TBTU and Ν,Ν-diisopropylethyl amine to get (IS, 2S,3R,5S)-Pinanediol-N-(2- Pyrazine carbonyl)-L-Phenylalanine-L-leucine boronate of formula 2 b) deprotecting of pinanediol moiety of compound of formula 3 using isobutyl boronic acid in the presence of aq. hydrochloric acid to yield bortezomib (formula 1) c) crystallizing crude bortezomib from acetone at room temperature followed by recrystallization from ethyl acetate
d) leaching the resulting product of step-c with n-heptane and drying at room temperature for 25-30h under high vacuum (750 mmHg) to afford of high chemical purity bortezomib (> 99.8%) containing total chemical and chiral impurities of less than 0.2%.
Brief description of drawings:
FIG.1 : Powder X-ray diffraction pattern of bortezomib polymorphic Form-N
FIG.2: DSC thermogram of bortezomib polymorphic Form-N
FIG.3: Infrared absorption spectrum of bortezomib polymorphic Form-N
X-ray powder diffraction spectra were measured on a Siemens d5000 x-ray powder diffracto-meter having a copper-ka radiation (1.5406a).
DSC data was collected from mettler toledo; model: DSC 823e
IR spectra were recorded on perkin elmer; model: ftir paragon 1000
The details of the process of the invention are provided in the examples given below which are provided by way of illustration only and therefore should not be construed to limit the scope of the invention. List of Abbreviations
AGR: All glass reactor
TBTU: 0-(Benzotriazol- 1 -yl)-N,N,N' ,Ν' -tetramethyluronium tetrafluoroborate
HPLC: High performance liquid chromatography
PXRD: Powder X-ray diffraction
I.R: Infrared spectroscopy
DSC: Differential scanning calorimetry
EXAMPLE
Preparation of (lS,2S,3R,5S)-Pinanediol-N-(2-Pyrazine carbonyl)-L-Phenylalanine- L-leucine boronate (4)
(lS,2S,3R,5S)-Pinanediol-p-(l-phenyl)-L-alanine-L-Leucine boronate HC1 (2, 320g, 0.71 moles), pyrazine carboxylic acid (3, 95.36g, 0.76 moles), TBTU (252.4g, 0.78 moles) and methylene chloride (3.80L) were charged in to 10L AGR. The reaction mass was cooled to -2 to 2°C, and Ν,Ν-Disiopropyl ethyl amine (320g, 2.48 moles) was added drop wise. The reaction mass was then warmed to 15°C and stirred for 80 min at 15-25°C.
The solvent was distilled off at 40-45 °C to obtain a brown coloured oil and the resulting product was dissolved in ethyl acetate (4.0L), washed with 5% aq. phosphoric acid solution (2.2L), 2% aq. potassium carbonate solution (2.2L) followed by 10% brine solution (2.5L). The organic layer was dried over sodium sulphate, and solvent was evaporated under reduced pressure to get a pale yellow coloured foam of the title compound.
Wt. of the compound: 365g; purity by HPLC: about 85%.
Above compound was taken to next step without further purification.
Preparation of bortezomib polymorphic forni-N
(l S,2S,3R,5S)-Pinanediol-N-(2-Pyrazine carbonyl)-L-Phenylalanine-L-leucine boronate (4, 360g, 0.69 moles), methanol (2.9L), isobutyl boronic acid (129.4g, 1.27 moles) and n- heptane (2.9L) were charged into 10L AGR and stirred for 10 min at room temperature. Aq. hydrochloric acid solution (218 ml cone, hydrochloric acid and 1.96L water) was added to the above reaction mass by maintaining the temperature of the reaction mass between 25-30°C. The reaction mass was stirred for 4h at room temperature. The layers were separated, lower aq. layer was washed with n-heptane (2xlL) and layers were separated.
The aq. layer was concentrated under reduced pressure at 40-45°C to obtain a cream colured suspension. The resulting suspension was dissolved in 2N aq. sodium hydroxide solution (prepared from 176g sodium hydroxide and 2L water) and washed with dichloromethane (3x1.5L). The aq. layer was separated and pH adjusted to 5.8 to 6.2 using aq. hydrochloric acid to separate the gummy material from the solution. The precipitated material was extracted into dichloromethane (2x1.8L) and layers were separated. The organic layer was dried over sodium sulphate and solvent was distilled off under reduced pressure to obtain pale yellow coloured oil. Ethyl acetate (2.16L) was charged to the oil and the solvent distilled off as above to yield bortezomib as off white coloured foamy solid (270g).
To the above solid, acetone (1.08L) was added and the reaction mass was allowed to stir for about lh at room temperature to form white coloured suspension. Acetone (0.54L) was charged further to the above suspension and stirred for another 2h. T he product was filtered off under suction with the help of chilled acetone (0.54L, 0-5°C), and dried under suction for lh, wt. of the solid: 1 18g.
Ethyl acetate (1.65L) was charged into a 5L AGR and warmed to 70-72°C, above solid (118g) was charged. The resulting solution was filtered through sintered funnel. The filtrate was allowed to stir at room temperature for 2.0-2.5h and the obtained slurry was filtered. The product was dried under suction for 2-3h under N2 atmosphere, wt. of the solid: 90g.
The above solid was leached with heptane (2x1.8L) at room temperature for 1.5h and then filtered. The resulting solid was dried under high vacuum (750mmHg) for 30h to afford bortezomib polymorphic form-N of high chemical purity. Wt. of the product: 80g Purity of bortezomib polymorphic form-N by HPLC > 99.8%. Related and chiral impurities <0.2%.
STABILITY OF BORTEZOMIB
Bortezomib prepared according to the present invention is subjected for stability studies in both long term (-20±5°C) and accelerated (5±3°C) storage conditions. Compound is found to be stable for the testing period of six months. Bortezomib (Form-N) of 99.96 chemical purity and 99.99% chiral purity was used in these studies and the results are tabulated (Table- 1).
Table-1: Stability studies of Form-N of bortezomib
Stability data of Form-II of bortezomib disclosed in WO 2008/075376 is also summarized for comparison (Table-2). Here also Bortezomib (Form-II) of 99.96 chemical purity and 99.99%) chiral purity was employed for studies in both long term (- 20±5°C) and accelerated (5±3°C) storage conditions.
Table-2: Stability of our Form-II of bortezomib (WO 2008/075376)
ADVANTAGES OF PRESENT INVENTION:
1. Present invention discloses novel crystal form of bortezomib designated as Form-N which is stable, reproducible on larger scale runs, and useful for the treatment of multiple myeloma. 2. Processes for the preparation of the novel crystalline form, namely Form-N of bortezomib is simple and easy to adopt on a commercial scale.
3. Polymorphic Form-N of bortezomib obtained by the present invention is of high purity in terms of related substances as well as enantiomeric purity.
4. Polymorphic Form-N of bortezomib retains the polymorphic integrity and chemical/chiral purity over a long period of time (6 months).
Claims
CLAIMS:
We claim: 1. Crystalline Form-N of bortezomib of formula 1 ,
1
having peaks in the powder X-ray diffraction spectrum at 2o values of about 3.6, 4.7, 5.5, 8.8, 9.3, 9.5, 11.1, 14.6, 15.5, 16.4, 16.7, 17.8, 18.5, 18.8, 19.5, 20.16, 20.46, 21.6 and 22.3 ±0.2;
bands in the infra red (IR) absorption spectrum (KBr) with peaks at 446, 511, 606, 701, 749, 870, 927, 1021, 1048, 1082, 1113, 1153, 1201, 1273, 1323, 1402, 1466, 1518, 1581, 1661, 2868, 2928, 2954, 3029, 3063, 3281 and 3391 cm"1 , and DSC thermogram exhibiting two endotherms between about 70°C and 95°C and about 125°C and 150°C.
2. A process for producing the polymorphic Form N of bortezomib as defined in claim 1, which comprises
a) dissolving bortezomib in acetone and allowing to crystallize at 25-30°C, stirring the resulting crystallized material for 1.5 -2. Oh, filtering the product, suck drying solid for lh, recrystalizing the resulting solid from hot ethyl acetate b) dissolving the solid obtained from acetone in ethyl acetate at 70-72°C and allowing to crystallize at room temperature for 2-2.5h, filtering the solid leaching with n-heptane at room temperature and finally drying the product under reduced pressure (750mm Hg) for 25 -3 Oh.
3. The polymorphic Form N of bortezomib as defined in any of claims 1-2 has a chemical purity of greater than 99.8% with less than 0.2% of chiral impurities.
4. The polymorphic Form N of bortezomib as defined in any of claims 1-3 is sufficiently stable that it retains the XRPD characteristics for 6 months.
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WO2016085943A1 (en) | 2014-11-25 | 2016-06-02 | Rastelli, Luca | Use of ubiquitin-proteasome system inhibitors for treatment of tumors associated with neurofibromatosis type-2 |
KR101741403B1 (en) * | 2014-10-01 | 2017-05-31 | 주식회사 경보제약 | Stable crystalline form botezomib |
RU2696854C1 (en) * | 2018-12-23 | 2019-08-08 | Акционерное Общество "Фарм-Синтез" | Method of producing bortezomib lyophilizate and a pharmaceutical composition containing bortezomib in form of a stable lyophilized product obtained by said method |
WO2019151133A1 (en) * | 2018-02-01 | 2019-08-08 | 日本化薬株式会社 | Manufacturing method for bortezomib crystals |
CN110642881A (en) * | 2019-10-18 | 2020-01-03 | 扬子江药业集团上海海尼药业有限公司 | Bortezomib crystal form M and preparation method and application thereof |
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KR101741403B1 (en) * | 2014-10-01 | 2017-05-31 | 주식회사 경보제약 | Stable crystalline form botezomib |
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CN110642881A (en) * | 2019-10-18 | 2020-01-03 | 扬子江药业集团上海海尼药业有限公司 | Bortezomib crystal form M and preparation method and application thereof |
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