WO2010034806A1 - Anhydrate and hydrate forms of strontium ranelate - Google Patents
Anhydrate and hydrate forms of strontium ranelate Download PDFInfo
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- WO2010034806A1 WO2010034806A1 PCT/EP2009/062439 EP2009062439W WO2010034806A1 WO 2010034806 A1 WO2010034806 A1 WO 2010034806A1 EP 2009062439 W EP2009062439 W EP 2009062439W WO 2010034806 A1 WO2010034806 A1 WO 2010034806A1
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- WIPO (PCT)
- Prior art keywords
- strontium ranelate
- strontium
- ranelate
- drying
- ray powder
- Prior art date
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- 229940079488 strontium ranelate Drugs 0.000 title claims abstract description 162
- XXUZFRDUEGQHOV-UHFFFAOYSA-J strontium ranelate Chemical compound [Sr+2].[Sr+2].[O-]C(=O)CN(CC([O-])=O)C=1SC(C([O-])=O)=C(CC([O-])=O)C=1C#N XXUZFRDUEGQHOV-UHFFFAOYSA-J 0.000 title abstract description 136
- 238000000034 method Methods 0.000 claims abstract description 31
- 238000002360 preparation method Methods 0.000 claims abstract description 25
- 239000008194 pharmaceutical composition Substances 0.000 claims abstract description 8
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 claims description 51
- ZHEZAQJNZMLYBA-UHFFFAOYSA-J distrontium;5-[bis(carboxylatomethyl)amino]-3-(carboxylatomethyl)-4-cyanothiophene-2-carboxylate;octahydrate Chemical compound O.O.O.O.O.O.O.O.[Sr+2].[Sr+2].[O-]C(=O)CN(CC([O-])=O)C=1SC(C([O-])=O)=C(CC([O-])=O)C=1C#N ZHEZAQJNZMLYBA-UHFFFAOYSA-J 0.000 claims description 40
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 35
- 238000001035 drying Methods 0.000 claims description 27
- 238000000634 powder X-ray diffraction Methods 0.000 claims description 25
- 239000007787 solid Substances 0.000 claims description 22
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 21
- 229950003464 ranelic acid Drugs 0.000 claims description 19
- 239000003960 organic solvent Substances 0.000 claims description 18
- 239000000725 suspension Substances 0.000 claims description 16
- RFFLAFLAYFXFSW-UHFFFAOYSA-N 1,2-dichlorobenzene Chemical compound ClC1=CC=CC=C1Cl RFFLAFLAYFXFSW-UHFFFAOYSA-N 0.000 claims description 15
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 15
- 238000010992 reflux Methods 0.000 claims description 13
- -1 strontium ranelate tetrahydrate Chemical class 0.000 claims description 11
- DJSXNILVACEBLP-UHFFFAOYSA-N ranelic acid Chemical compound OC(=O)CN(CC(O)=O)C=1SC(C(O)=O)=C(CC(O)=O)C=1C#N DJSXNILVACEBLP-UHFFFAOYSA-N 0.000 claims description 9
- 238000010438 heat treatment Methods 0.000 claims description 8
- 159000000008 strontium salts Chemical class 0.000 claims description 8
- 239000002904 solvent Substances 0.000 claims description 7
- 239000006227 byproduct Substances 0.000 claims description 6
- XDTMQSROBMDMFD-UHFFFAOYSA-N Cyclohexane Chemical compound C1CCCCC1 XDTMQSROBMDMFD-UHFFFAOYSA-N 0.000 claims description 4
- 125000001931 aliphatic group Chemical group 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 4
- 208000001132 Osteoporosis Diseases 0.000 claims description 3
- 239000003814 drug Substances 0.000 claims description 3
- 239000002671 adjuvant Substances 0.000 claims description 2
- 239000003849 aromatic solvent Substances 0.000 claims description 2
- 239000000546 pharmaceutical excipient Substances 0.000 claims description 2
- 150000004689 octahydrates Chemical class 0.000 description 19
- 150000004685 tetrahydrates Chemical group 0.000 description 16
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 15
- 150000004690 nonahydrates Chemical group 0.000 description 14
- 238000002329 infrared spectrum Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 8
- 238000004821 distillation Methods 0.000 description 8
- 230000003247 decreasing effect Effects 0.000 description 7
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 6
- 238000004458 analytical method Methods 0.000 description 6
- ZXEKIIBDNHEJCQ-UHFFFAOYSA-N isobutanol Chemical compound CC(C)CO ZXEKIIBDNHEJCQ-UHFFFAOYSA-N 0.000 description 6
- 239000000203 mixture Substances 0.000 description 6
- 239000002244 precipitate Substances 0.000 description 6
- 239000011541 reaction mixture Substances 0.000 description 6
- 239000000523 sample Substances 0.000 description 6
- 239000000047 product Substances 0.000 description 5
- 238000001179 sorption measurement Methods 0.000 description 5
- 238000001237 Raman spectrum Methods 0.000 description 4
- 150000001875 compounds Chemical class 0.000 description 4
- 150000004688 heptahydrates Chemical class 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- OHULXNKDWPTSBI-UHFFFAOYSA-N strontium;propan-2-olate Chemical compound [Sr+2].CC(C)[O-].CC(C)[O-] OHULXNKDWPTSBI-UHFFFAOYSA-N 0.000 description 4
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 3
- 239000012736 aqueous medium Substances 0.000 description 3
- 150000004682 monohydrates Chemical class 0.000 description 3
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 3
- 238000001228 spectrum Methods 0.000 description 3
- 229910052712 strontium Inorganic materials 0.000 description 3
- CIOAGBVUUVVLOB-UHFFFAOYSA-N strontium atom Chemical compound [Sr] CIOAGBVUUVVLOB-UHFFFAOYSA-N 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 239000003039 volatile agent Substances 0.000 description 3
- FYGHSUNMUKGBRK-UHFFFAOYSA-N 1,2,3-trimethylbenzene Chemical compound CC1=CC=CC(C)=C1C FYGHSUNMUKGBRK-UHFFFAOYSA-N 0.000 description 2
- 208000020084 Bone disease Diseases 0.000 description 2
- YNQLUTRBYVCPMQ-UHFFFAOYSA-N Ethylbenzene Chemical compound CCC1=CC=CC=C1 YNQLUTRBYVCPMQ-UHFFFAOYSA-N 0.000 description 2
- 238000003109 Karl Fischer titration Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000003795 desorption Methods 0.000 description 2
- 238000004090 dissolution Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 230000011164 ossification Effects 0.000 description 2
- 238000002953 preparative HPLC Methods 0.000 description 2
- LMHHRCOWPQNFTF-UHFFFAOYSA-N s-propan-2-yl azepane-1-carbothioate Chemical compound CC(C)SC(=O)N1CCCCCC1 LMHHRCOWPQNFTF-UHFFFAOYSA-N 0.000 description 2
- 239000006228 supernatant Substances 0.000 description 2
- 208000006386 Bone Resorption Diseases 0.000 description 1
- 229910002483 Cu Ka Inorganic materials 0.000 description 1
- 238000004566 IR spectroscopy Methods 0.000 description 1
- DTOITDBQDACPAT-UHFFFAOYSA-N N#Cc1c(N(CC(O)=O)CC(O)=O)[s]cc1CC(O)=O Chemical compound N#Cc1c(N(CC(O)=O)CC(O)=O)[s]cc1CC(O)=O DTOITDBQDACPAT-UHFFFAOYSA-N 0.000 description 1
- 238000001069 Raman spectroscopy Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000004480 active ingredient Substances 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 230000003262 anti-osteoporosis Effects 0.000 description 1
- 239000008346 aqueous phase Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 230000004097 bone metabolism Effects 0.000 description 1
- 230000024279 bone resorption Effects 0.000 description 1
- 230000008416 bone turnover Effects 0.000 description 1
- 239000002775 capsule Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 125000000113 cyclohexyl group Chemical group [H]C1([H])C([H])([H])C([H])([H])C([H])(*)C([H])([H])C1([H])[H] 0.000 description 1
- 239000008298 dragée Substances 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 125000000267 glycino group Chemical group [H]N([*])C([H])([H])C(=O)O[H] 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000004128 high performance liquid chromatography Methods 0.000 description 1
- 238000000589 high-performance liquid chromatography-mass spectrometry Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000011005 laboratory method Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 239000006186 oral dosage form Substances 0.000 description 1
- 239000012074 organic phase Substances 0.000 description 1
- 230000000144 pharmacologic effect Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000011514 reflex Effects 0.000 description 1
- 238000009877 rendering Methods 0.000 description 1
- 238000013341 scale-up Methods 0.000 description 1
- 239000012056 semi-solid material Substances 0.000 description 1
- 239000011343 solid material Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000006190 sub-lingual tablet Substances 0.000 description 1
- 229940098466 sublingual tablet Drugs 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 239000003826 tablet Substances 0.000 description 1
- 230000001225 therapeutic effect Effects 0.000 description 1
- 125000003944 tolyl group Chemical group 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
- 150000003738 xylenes Chemical class 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D333/00—Heterocyclic compounds containing five-membered rings having one sulfur atom as the only ring hetero atom
- C07D333/02—Heterocyclic compounds containing five-membered rings having one sulfur atom as the only ring hetero atom not condensed with other rings
- C07D333/04—Heterocyclic compounds containing five-membered rings having one sulfur atom as the only ring hetero atom not condensed with other rings not substituted on the ring sulphur atom
- C07D333/26—Heterocyclic compounds containing five-membered rings having one sulfur atom as the only ring hetero atom not condensed with other rings not substituted on the ring sulphur atom with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
- C07D333/38—Carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D333/00—Heterocyclic compounds containing five-membered rings having one sulfur atom as the only ring hetero atom
- C07D333/02—Heterocyclic compounds containing five-membered rings having one sulfur atom as the only ring hetero atom not condensed with other rings
- C07D333/04—Heterocyclic compounds containing five-membered rings having one sulfur atom as the only ring hetero atom not condensed with other rings not substituted on the ring sulphur atom
- C07D333/26—Heterocyclic compounds containing five-membered rings having one sulfur atom as the only ring hetero atom not condensed with other rings not substituted on the ring sulphur atom with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
- C07D333/38—Carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals
- C07D333/40—Thiophene-2-carboxylic acid
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K31/00—Medicinal preparations containing organic active ingredients
- A61K31/33—Heterocyclic compounds
- A61K31/38—Heterocyclic compounds having sulfur as a ring hetero atom
- A61K31/381—Heterocyclic compounds having sulfur as a ring hetero atom having five-membered rings
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P19/00—Drugs for skeletal disorders
- A61P19/08—Drugs for skeletal disorders for bone diseases, e.g. rachitism, Paget's disease
- A61P19/10—Drugs for skeletal disorders for bone diseases, e.g. rachitism, Paget's disease for osteoporosis
-
- 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
- C07F3/00—Compounds containing elements of Groups 2 or 12 of the Periodic Table
Definitions
- the present invention relates to novel anhydrate and hydrate forms of strontium ranelate, processes for the preparation thereof and pharmaceutical compositions containing said strontium ranelate. Furthermore, the invention relates to by-products obtained in the synthesis of the novel forms of strontium ranelate.
- Strontium ranelate having the chemical name 5-[bis(carboxymethyl)-amino]-2-carboxy-4- cyano-3-thiopheacetic acid di strontium salt has the following chemical structure:
- Strontium ranelate the bis-strontium (II) salt of ranelic acid
- Strontium ranelate comprises strontium, which is a bone-seeking element. It is suggested to act through dual effects on bone metabolism, by increased bone formation and decreased bone resorption, resulting in a rebalance of bone turnover in favour of bone formation.
- Strontium ranelate has very valuable pharmacological and therapeutic properties, especially pronounced anti-osteoporotic properties, making this compound useful in the treatment of bone diseases.
- Strontium ranelate is freely soluble in aqueous media of low pH ( ⁇ pH 2), but only slightly soluble in neutral aqueous media. Strontium ranelate is practically insoluble in most organic solvents.
- Several crystalline forms of strontium ranelate are known in the art.
- EP 415 850 A1 discloses octahydrate, heptahydrate and tetrahydrate forms of strontium ranelate.
- WO 2006/035122 A1 discloses a nonahydrate form of strontium ranelate.
- These known crystalline forms of strontium ranelate are, however, hygroscopic and thus unstable, rendering the preparation of pharmaceutical compositions difficult and disadvantageous.
- strontium ranelate in a form which does not show the problems of the known forms of strontium ranelate, and in particular is non-hygroscopic, stable and nevertheless is sufficiently soluble in water, in particular more soluble than the known forms of strontium ranelate.
- strontium ranelate having a decreased content of water compared to the known forms. Further it has been found that these forms of strontium ranelate can be obtained by heating strontium ranelate suspended in an organic solvent under reflux, and recovering the solid, reacting strontium salts with ranelic acid in certain solvents, or drying strontium ranelate hydrates under certain conditions. The obtained forms of strontium ranelate are less hygroscopic, more stable and more soluble than the crystalline forms of strontium ranelate known in the art.
- the present invention therefore relates to strontium ranelate having a water content of less than about 5.5 wt.%.
- the hydrate form of strontium ranelate has a water content of about 1.5 wt.% to about 5.5 wt.%.
- the hydrate form of strontium ranelate according to the present invention has a water content of about 2.5 wt.% to about 4.5 wt.%, in particular about 3.3 wt.% to about 3.5 wt.%, such as about 3.4 wt.%.
- a water content of about 2.5 wt.% to about 4.5 wt.%, in particular about 3.3 wt.% to about 3.5 wt.%, such as about 3.4 wt.%.
- methods known in the art to determine the content of water of a chemical substance are for example the Karl-Fischer- titration or the "loss-on-drying" analysis (LOD, drying loss).
- LOD loss-on-drying
- the water content is preferably determined, according to the present invention, according to the loss-on-drying analysis (LOD).
- LOD loss-on-drying analysis
- Loss-on-drying is a known laboratory method of measuring the level of moisture in solid or semi-solid materials and it is known in the art how to conduct this method. Typically, a sample of material is weighed, heated in an oven for an appropriate period optionally under reduced pressure (e.g. at 180 0 C over night at 30 mbar), cooled, optionally in the dry atmosphere of a desiccator (exsiccator) and then re-weighed. If the volatile content of the solid is primary water, the LOD technique gives a good measure of moisture content.
- the water content of the strontium ranelate is most preferably determined as LOD (180 0 C, 30 mbar, 12 hours), i.e. heating over 12 hours at a temperature of 180 0 C and at a pressure of 30 mbar.
- the hemihydrate of strontium ranelate theoretically has a water content of about 1.7 wt.%, the monohydrate of 3.4 wt.%, and the sesquihydrate of about 5 wt.%. All these forms are therefore encompassed by the present invention.
- strontium ranelate of the present invention can be in amorphous or crystalline form.
- the anhydrate form of strontium ranelate preferably is in amorphous form.
- the crystalline and amorphous forms of strontium ranelate can be identified according to their X-ray powder diffraction patterns (XRD).
- XRD X-ray powder diffraction patterns
- the samples were analyzed on a Bruker-axs D8 Advance powder X-ray diffractometer (Bruker-AXS, Düsseldorf, Germany). The sample holder was rotated in a plane parallel to its surface at 20 rpm during measurement.
- the measurement conditions were as follows: Radiation: Cu Ka, Source 40 kV / 40 mA, divergence slit 0.6 mm, antiscattering slit 5.59 mm, detector slit 10.28 mm, start angle 2 °, end angle 55°, Step 0.016° 2 ⁇ .
- the first crystalline form of strontium ranelate according to the present invention (form I) is preferably such having significant X-ray powder diffraction pattern peaks at 2-Theta angle values of 17.6 ⁇ 0.2, 23.1 ⁇ 0.2 and 27.5 ⁇ 0.2, more preferably of 12.6 ⁇ 0.2, 17.6 ⁇ 0.2, 23.1 ⁇ 0.2 and 27.5 ⁇ 0.2, in particular it has the most significant peaks at 2-Theta angle values of 8.7 ⁇ 0.2, 12.6 ⁇ 0.2, 17.6 ⁇ 0.2, 20.3 ⁇ 0.2, 23.1 ⁇ 0.2, 26.3 ⁇ 0.2, 27.5 ⁇ 0.2 and 29.5 ⁇ 0.2.
- the crystalline form I of strontium ranelate has an X-ray powder diffraction pattern, wherein the peaks are at the following 2-Theta angle values and having approximately the following relative intensities:
- the crystalline form I of strontium ranelate according to the present invention has the X-ray powder diffraction pattern corresponding to the one shown in Figure 1.
- the present invention provides a solid state structure of strontium ranelate characterized in that the structure gives an X-ray powder diffraction pattern corresponding to the pattern shown in Figure 1.
- the second crystalline form of strontium ranelate according to the present invention (form II) is preferably such having significant X-ray powder diffraction pattern peaks at 2-Theta angle values of 8.7 ⁇ 0.2, 13.7 ⁇ 0.2 and 17.5 ⁇ 0.2, more preferably of 8.7 ⁇ 0.2, 9.2 ⁇ 0.2, 13.7 ⁇ 0.2 and 17.5 ⁇ 0.2, in particular it has the most significant peaks at 2-Theta angle values of 8.7 ⁇ 0.2, 9.2 ⁇ 0.2, 10.4 ⁇ 0.2, 13.7 ⁇ 0.2, 17.5 ⁇ 0.2, 19.7 ⁇ 0.2, 25.5 ⁇ 0.2 and 27.1 ⁇ 0.2.
- the crystalline form Il of strontium ranelate has an X-ray powder diffraction pattern, wherein the peaks are at the following 2-Theta angle values and having approximately the following relative intensities:
- the crystalline form Il of strontium ranelate according to the present invention has the X-ray powder diffraction pattern corresponding to the one shown in Figure 2.
- the present invention provides a solid state structure of strontium ranelate characterized in that the structure gives an X-ray powder diffraction pattern corresponding to the pattern shown in Figure 2.
- the third crystalline form of strontium ranelate according to the present invention (form III) is preferably such having significant X-ray powder diffraction pattern peaks at 2-Theta angle values of 10.5 ⁇ 0.2, 13.9 ⁇ 0.2 and 19.7 ⁇ 0.2, more preferably of 9.2 ⁇ 0.2, 10.5 ⁇ 0.2, 13.9 ⁇ 0.2 and 19.7 ⁇ 0.2, in particular it has the most significant peaks at 2-Theta angle values of 9.2 ⁇ 0.2, 10.5 ⁇ 0.2, 13.9 ⁇ 0.2, 14.2 ⁇ 0.2, 19.7 ⁇ 0.2, 26.8 ⁇ 0.2 and 27.2 ⁇ 0.2.
- the crystalline form III of strontium ranelate has an X-ray powder diffraction pattern, wherein the peaks are at the following 2-Theta angle values and having approximately the following relative intensities:
- the crystalline form III of strontium ranelate according to the present invention has the X-ray powder diffraction pattern corresponding to the one shown in Figure 3.
- the present invention provides a solid state structure of strontium ranelate characterized in that the structure gives an X-ray powder diffraction pattern corresponding to the pattern shown in Figure 3.
- the present invention further relates to a first process for the preparation of the anhydrate or hydrate forms of strontium ranelate as described above, which comprises the steps of
- step a) suspending crude strontium ranelate in an organic solvent, in particular toluene, b) heating the suspension of step a) under reflux, c) cooling the suspension, d) recovering the solid and drying the solid to obtain crystalline strontium ranelate, and e) optionally converting the crystalline form into an amorphous form of strontium ranelate.
- each strontium ranelate can be applied, preferably the known tetrahydrate, heptahydrate or octahydrate form, as described in the art, e.g. in EP 415 850 A1 , or the nonahydrate of strontium ranelate, as described in the art, e.g. in WO 2006/035122 Al
- the crude strontium ranelate is suspended in step a) in an organic solvent.
- organic solvent can be used, which is suitable to form a suspension with strontium ranelate, and which is further suitable for the removal of water under reflux.
- the organic solvent is an aromatic solvent, such as for example benzene, toluene, ethylbenzene, xylenes, trimethylbenzene, 1 ,2-dichlorobenzene or mixtures thereof, preferably toluene or 1 ,2-dichlorobenzene.
- the organic solvent is an a-protic aliphatic solvent, such as for example cyclohexane.
- form Il of crystalline strontium ranelate can be obtained.
- the organic solvent is a protic aliphatic solvent, such as for example alcohols, in particular methanol, ethanol, iso-butanol and mixtures thereof, such as a mixture of methanol and iso-butanol.
- a protic aliphatic solvent such as for example alcohols, in particular methanol, ethanol, iso-butanol and mixtures thereof, such as a mixture of methanol and iso-butanol.
- step b) the suspension obtained under step a) is heated under reflux.
- the temperature necessary to obtain a sufficient reflux depends on the organic solvent used. If toluene is used as organic solvent, the suspension is heated to about 130 0 C to ensure sufficient reflux. If the organic solvent is cyclohexane the temperature can be about 140 0 C. If the organic solvent is ethanol the temperature can be about 110 0 C. If the heating temperature is above the boiling point of the solvent, the temperature is the temperature of the heating device, such as the heating bath. Optionally an additional amount of the organic solvent, which is preferably the same organic solvent as used in step a), such as toluene, can be added during the heating in step b).
- step c) the suspension is cooled down, preferably to room temperature, or below, e.g. to about 25 0 C, 20 0 C or 4 0 C.
- step d) the solid is recovered and dried to obtain crystalline strontium ranelate according to the present invention.
- strontium ranelate is practically insoluble in most organic solvents, a high yield of recovering can be achieved.
- the drying in step d) is conducted at room temperature at a pressure of about 5 mbar or lower, i.e. under vacuum.
- step d) the drying is conducted at a temperature of about 30 0 C to about 60 °C, in particular about 50 0 C to about 60 0 C, at a pressure of about 5 mbar or lower.
- step d) the drying is conducted at a temperature of about 70 0 C to about 90 0 C, in particular about 80 0 C, at a pressure of about 5 mbar or lower, such as about 1 mbar.
- the drying in step d) is conducted at a temperature of about 30 °C to about 60 0 C, in particular of about 50 0 C to about 60 °C, at a pressure of about 100 mbar or lower, preferably about 100 mbar to 5 mbar, in particular 50 mbar to 5 mbar.
- form Il of crystalline strontium ranelate can be prepared by a process comprising the step of drying strontium ranelate octahydrate or strontium ranelate tetrahydrate at a temperature of about 130 0 C to about 150 0 C, such as about 140 0 C, at about room pressure.
- form III of crystalline strontium ranelate can be prepared by reacting a strontium salt, in particular strontium isopropoxide, with ranelic acid in ethylene glycol.
- This reaction can for example be carried out by stirring a solution of strontium isopropoxide and ranelic acid in ethylene glycol at room temperature for a prolonged time, such as about 72 hours, and recovering the precipitate.
- Amorphous strontium ranelate according to the present invention can for example also be prepared from crystalline strontium ranelate according to the present invention by methods known in the art, for example by rapidly cooling a melt of the strontium ranelate.
- an anhydrate amorphous form of strontium ranelate can be prepared by drying a strontium ranelate hydrate at a temperature above about 160 0 C, such as about 180 0 C. The drying can be carried out for 2 hours or more, such as about 3 hours to about 6 hours. The drying can be carried out a room pressure or reduced pressure, such as about 30 mbar or below.
- the present invention further relates to the hydrate form of strontium ranelate obtainable by the processes as described above.
- the present invention further relates to a pharmaceutical composition
- a pharmaceutical composition comprising the strontium ranelate according to the present invention as described above.
- the pharmaceutical composition further comprises suitable pharmaceutically acceptable excipients and/or adjuvants as known in the art.
- the pharmaceutical composition is preferably suitable for oral administration and is in particular a tablet or dragee, sachet, granules, sublingual tablet, capsule or any further oral dosage forms as known in the art.
- the useful dosage can be varied as known in the art and can be, e.g., from about 0.2 to about 10 g per day, such as a 2 g daily dose.
- the present invention further relates to the use of strontium ranelate as described above for the preparation of a medicament for the treatment of bone diseases, in particular osteoporosis.
- Des-carboxy ranelic acid has the following structural formula:
- strontium ranelate As strontium ranelate is used as pharmaceutically active ingredient it is important to verify the amount of unwanted by-products in the final strontium ranelate. For determining the amounts of by-products in strontium ranelate probes of the by-products are required as standards. Therefore, des-carboxy ranelic acid and the strontium salt of des-carboxy ranelic acid have been isolated using preparative HPLC. These compounds are provided by the present invention to be used as standards for determining the purity of strontium ranelate.
- the crystalline and amorphous forms of strontium ranelate according to the present invention can be advantageously obtained by a processes according to the present invention. Examples for the processes according to the present invention can be found in Examples 1 to 5 and 11 to 19.
- the crystalline form of strontium ranelate as described above is prepared starting from a strontium ranelate tetrahydrate, e.g. prepared according to EP 415 850 A1
- the strontium ranelate is obtained starting from a strontium ranelate octahydrate, e.g. prepared according to EP 415 850 A1.
- the strontium ranelate as described above can advantageously be used in pharmaceutical compositions, as it is less hygroscopic than the known crystalline forms.
- Example 10 wherein the dynamic vapour sorption, i.e. the desorption and absorption of water of samples of strontium ranelate octahydrate is compared to those of the strontium ranelate according to the present invention.
- the octahydrate can be easily converted into the tetrahydrate by decreasing the humidity and by the following increase of the humidity the heptahydrate and the nonahydrate can be obtained.
- the strontium ranelate according to the present invention which comprises e.g.
- the monohydrate releases water only by less than 2% of its total weight.
- the water uptake with increasing humidity is also very low with the strontium ranelate according to the present invention.
- the mass increase is only about 2% of the total weight at the strontium ranelate according to the present invention. This shows that between the broad range of 0% to 80% relative humidity the strontium ranelate according to the present invention is excellently stable.
- the strontium ranelate according to the present invention is excellently soluble in aqueous media, in particular water.
- the strontium ranelate according to the present invention designated as "strontium ranelate monohydrate" shows a good solubility compared to the known crystalline forms, i.e. the tetrahydrate, nonahydrate and octahydrate of strontium ranelate.
- the saturation solubility of strontium ranelate according to the present invention in water is higher than those of the crystalline forms of strontium ranelate as known in the art, i.e. the tetrahydrate, octahydrate and nonahydrate of strontium ranelate.
- strontium ranelate can be identified by XRD-measurements, Raman and infrared spectroscopy as shown in Examples 7 to 9.
- Figure 1 shows an X-ray powder diffraction pattern of the strontium ranelate form I.
- Figure 2 shows an X-ray powder diffraction pattern of the strontium ranelate form II.
- Figure 3 shows an X-ray powder diffraction pattern of the strontium ranelate form III.
- Figure 4 shows a superposition of five Raman spectra of samples of strontium ranelate, which are from below to top: 1 : strontium ranelate of Example 1 ; 2: strontium ranelate of Example 2; 3: strontium ranelate tetrahydrate, prepared according to EP 415 850 A1 ; 4: strontium ranelate nonahydrate, obtained from strontium ranelate octahydrate (prepared according to EP 415 850 A1) according to Example 1 of WO 2006/035122 A1 ; 5: octahydrate (prepared according to EP 415 850 A1).
- Figure 5 shows an infrared spectrum of strontium ranelate form I.
- Figure 6 shows dynamic vapour sorption diagrams of strontium ranelate octahydrate (left) and strontium ranelate according to the present invention (right) (a detailed description of the diagram is given in Example 10).
- Figure 7 shows an infrared spectrum of strontium ranelate form II.
- Figure 8 shows an infrared spectrum of strontium ranelate form III.
- the XRD was identical with that of Example 1.
- the IR spectra is shown in Figure 2 (second from the bottom); LOD: 4.3% (180 °C, 30 mbar, over night).
- strontium ranelate according to the present invention was dissolved using the following parameters:
- the strontium ranelate according to the present invention designated as "Ranelate Monohydrate” shows an improved dissolution compared to the tetrahydrate, nonahydrate or octahydrate crystalline forms, in particular after 60, 90 and 120 minutes.
- the most significant reflexes are at 8.7, 12.6, 17.6, 20.3, 23.1 , 26.3, 27.5 and 29.5 ° 2-theta (the most characteristic being at 17.6, 23.1 and 27.5).
- Example 8 Raman spectra of crystalline forms of strontium ranelate
- Raman spectra have been acquired from five samples of strontium ranelate, and are shown superimposed in Figure 4. From bottom to top Figure 4 indicates the Raman spectra of 1 : strontium ranelate of Example 1 ; 2: strontium ranelate of Example 2; 3: strontium ranelate tetrahydrate (e.g. prepared according to EP 415 850 A1); 4: nonahydrate, obtained from strontium ranelate octahydrate (e.g. prepared according to EP 415 850 A1) according to Example 1 of WO 2006/035122 A1 ; 5: strontium ranelate octahydrate (e.g. prepared according to EP 415 850 A1).
- the spectra acquired from the octahydrate and the nonahydrate are equivalent.
- the spectra obtained from the tetrahydrate shows high conformity with those of the octahydrate and nonahydrate.
- the peak at 1380 cm '1 is specific for the tetrahydrate.
- the spectra of the strontium ranelate as obtained from Examples 1 and 2 differ from the tetrahydrate, octahydrate and nonahydrate at least by the presence of the peak at about 1570 cm “1 and about 1330 cm “1 .
- the crystalline form of strontium ranelate according to the present invention does not show a broad peak at about 3200 cm "1 (OH-peak). Further the significant differences are in the range of 2200 cm "1 .
- the tetrahydrate typically shows a double peak at about 2193 and about 2210 cm '1 , in comparison to a peak at about 2203 cm "1 present at the octahydrate.
- the strontium ranelate according to the present invention shows a significant peak at about 2207 to about 2212 cm "1 .
- strontium ranelate shows four characteristic peaks at about 1622, 1555, 1538 and 1508 cm “1 .
- the IR-spectra of octahydrate and nonahydrate show only two significant peaks (octahydrate at 1551 and 1516 cm “1 ; tetrahydrate at 1567 and 1515 cm “1 ).
- Example 10 Dynamic vapour sorption
- the dynamic vapour sorption experiments were conducted by exposing the sample to changing relative humidities. In the beginning the relative humidity was 50%, then decreased to nearly 0%, and then increased to 95% (indicated by the V-shaped curve corresponding to the right scale). At the same time, the mass difference of the sample is determined (U-shaped curve in the left diagram, starting at 100%, and the flat curve in the right diagram, also starting at 100%; left scale in both diagrams).
- the sorption diagram for the octahydrate shows that with decreasing humidity starting from the octahydrate water is removed to give a tetrahydrate via an intermediate heptahydrate. With increasing humidity the tetrahydrate is very fast converted into a nonahydrate.
- the strontium ranelate according to the present invention In contrast with decreasing humidity the strontium ranelate according to the present invention (shown in right diagram of Figure 6) releases water only by less than 2% of its total weight. The water uptake with increasing humidity is also very low. At about 80% humidity the weight increase is only about 2% of the total weight. This shows that between 0% and 80% relative humidity the strontium ranelate according to the present invention is stable.
- ranelic acid dissolved in 10 ml ethylene glycol in a 50 ml round bottom flask was added a solution of 114 mg (0.56 mmol) strontium isopropoxide in 5 ml ethylene glycol.
- the initially clear solution was stirred at room temperature for 72 h.
- the milky precipitate formed was allowed to settle and the supernatant was removed with a pipette.
- the precipitate was re-slurried in 15 ml dichloromethane, allowed to settle and the supernatant was removed with a pipette. This washing was repeated until the precipitate became flakier.
- the precipitate was filtered off, washed with dichloromethane and dried on the rotavap (60 °C/1 mbar) for 3 h.
- strontium isopropylate [Sr(OiPr) 2 ] were dissolved in refluxing methanol. To this solution 1.2 mmol of ranelic acid were added and the mixture was stirred at reflux temperature for 1 h. The solid precipitate was collected and dried at 60 0 C for 1 h.
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Abstract
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CN2009801474430A CN102227419A (en) | 2008-09-29 | 2009-09-25 | Anhydrate and hydrate forms of strontium ranelate |
EP09783416A EP2346846A1 (en) | 2008-09-29 | 2009-09-25 | Anhydrate and hydrate forms of strontium ranelate |
IL212024A IL212024A0 (en) | 2008-09-29 | 2011-03-29 | Anhydrate and hydrate forms of strontium ranelate |
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EP08017141 | 2008-09-29 | ||
EP08017141.6 | 2008-09-29 | ||
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EP (1) | EP2346846A1 (en) |
KR (1) | KR20110066197A (en) |
CN (1) | CN102227419A (en) |
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Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ITMI20100355A1 (en) * | 2010-03-05 | 2011-09-06 | Chemelectiva S R L | PROCESS FOR THE PREPARATION OF A POLIMORFO |
CN102321068A (en) * | 2011-08-01 | 2012-01-18 | 山东铂源化学有限公司 | Method for preparing strontium ranelate |
WO2012046251A2 (en) * | 2010-10-08 | 2012-04-12 | Glenmark Generics Limited | Novel form of ranelic acid |
WO2012143932A1 (en) * | 2011-04-21 | 2012-10-26 | Shilpa Medicare Limited | Crystalline strontium ranelate form-s |
WO2012163309A1 (en) | 2011-05-30 | 2012-12-06 | Zentiva, K.S. | Stable crystalline form x of strontium ranelate |
EP2641905A1 (en) | 2012-03-23 | 2013-09-25 | Urquima S.A. | Solid forms of strontium ranelate and processes for their preparation |
US8569514B1 (en) | 2012-05-17 | 2013-10-29 | Divi's Laboratories, Ltd. | Process for the preparation of strontium ranelate |
WO2013175270A1 (en) * | 2012-05-25 | 2013-11-28 | Fleming Laboratories Limited | Improved process for the preparation of strontium ranelate hydrates and new polymorphic form of monohydrate |
Families Citing this family (1)
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CN102764235B (en) * | 2012-06-21 | 2017-09-05 | 浙江华海药业股份有限公司 | Strontium ranelate dry suspension and preparation method thereof |
Citations (3)
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EP0415850A1 (en) | 1989-09-01 | 1991-03-06 | Adir Et Compagnie | Bivalent metal salts of 2-N,N-di(carboxymethyl)amino,3-cyano,4-carboxymethyl,5-carboxy-thiophene-acid, process for their preparation and pharmaceutical compositions containing them |
EP1642897A1 (en) * | 2004-09-30 | 2006-04-05 | Les Laboratoires Servier | Alpha-crystalline form of Strontium Ranelate, process of preparation therof and pharmaceutical compositions containing it |
US20090082578A1 (en) * | 2007-09-26 | 2009-03-26 | Les Laboratoires Servier | Process for the synthesis of strontium ranelate and its hydrates |
-
2009
- 2009-09-25 CN CN2009801474430A patent/CN102227419A/en active Pending
- 2009-09-25 RU RU2011116926/04A patent/RU2011116926A/en not_active Application Discontinuation
- 2009-09-25 EP EP09783416A patent/EP2346846A1/en not_active Withdrawn
- 2009-09-25 KR KR1020117009675A patent/KR20110066197A/en not_active Application Discontinuation
- 2009-09-25 WO PCT/EP2009/062439 patent/WO2010034806A1/en active Application Filing
-
2011
- 2011-03-29 IL IL212024A patent/IL212024A0/en unknown
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
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EP0415850A1 (en) | 1989-09-01 | 1991-03-06 | Adir Et Compagnie | Bivalent metal salts of 2-N,N-di(carboxymethyl)amino,3-cyano,4-carboxymethyl,5-carboxy-thiophene-acid, process for their preparation and pharmaceutical compositions containing them |
EP1642897A1 (en) * | 2004-09-30 | 2006-04-05 | Les Laboratoires Servier | Alpha-crystalline form of Strontium Ranelate, process of preparation therof and pharmaceutical compositions containing it |
WO2006035122A1 (en) | 2004-09-30 | 2006-04-06 | Les Laboratoires Servier | Strontium ranelate alpha crystalline form, method for the preparation thereof and pharmaceutical compositions containing said agent |
US20090082578A1 (en) * | 2007-09-26 | 2009-03-26 | Les Laboratoires Servier | Process for the synthesis of strontium ranelate and its hydrates |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ITMI20100355A1 (en) * | 2010-03-05 | 2011-09-06 | Chemelectiva S R L | PROCESS FOR THE PREPARATION OF A POLIMORFO |
WO2011107454A1 (en) | 2010-03-05 | 2011-09-09 | Chemelectiva Srl | Process for the preparation of a polymorph of strontium ranelate |
WO2012046251A2 (en) * | 2010-10-08 | 2012-04-12 | Glenmark Generics Limited | Novel form of ranelic acid |
WO2012046251A3 (en) * | 2010-10-08 | 2012-06-07 | Glenmark Generics Limited | Unsolvated form of ranelic acid and process for preparation thereof |
WO2012143932A1 (en) * | 2011-04-21 | 2012-10-26 | Shilpa Medicare Limited | Crystalline strontium ranelate form-s |
WO2012163309A1 (en) | 2011-05-30 | 2012-12-06 | Zentiva, K.S. | Stable crystalline form x of strontium ranelate |
CN102321068A (en) * | 2011-08-01 | 2012-01-18 | 山东铂源化学有限公司 | Method for preparing strontium ranelate |
CN102321068B (en) * | 2011-08-01 | 2013-01-23 | 山东铂源药业有限公司 | Method for preparing strontium ranelate |
EP2641905A1 (en) | 2012-03-23 | 2013-09-25 | Urquima S.A. | Solid forms of strontium ranelate and processes for their preparation |
US8569514B1 (en) | 2012-05-17 | 2013-10-29 | Divi's Laboratories, Ltd. | Process for the preparation of strontium ranelate |
WO2013175270A1 (en) * | 2012-05-25 | 2013-11-28 | Fleming Laboratories Limited | Improved process for the preparation of strontium ranelate hydrates and new polymorphic form of monohydrate |
Also Published As
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CN102227419A (en) | 2011-10-26 |
IL212024A0 (en) | 2011-06-30 |
KR20110066197A (en) | 2011-06-16 |
EP2346846A1 (en) | 2011-07-27 |
RU2011116926A (en) | 2012-11-10 |
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