US20080275099A1 - Solid Forms of (E)-1-(4-((1R,2S,3R)-1,2,3,4-Tetrahydroxybutyl)-1H-imidazol-2-yl)ethanone Oxime - Google Patents

Solid Forms of (E)-1-(4-((1R,2S,3R)-1,2,3,4-Tetrahydroxybutyl)-1H-imidazol-2-yl)ethanone Oxime Download PDF

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US20080275099A1
US20080275099A1 US12/101,445 US10144508A US2008275099A1 US 20080275099 A1 US20080275099 A1 US 20080275099A1 US 10144508 A US10144508 A US 10144508A US 2008275099 A1 US2008275099 A1 US 2008275099A1
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tetrahydroxybutyl
imidazol
ethanone oxime
crystalline
canceled
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Wenxue Wu
HaiMing Zhang
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Lexicon Pharmaceuticals Inc
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Lexicon Pharmaceuticals Inc
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Priority to US12/101,445 priority Critical patent/US20080275099A1/en
Assigned to LEXICON PHARMACEUTICALS, INC. reassignment LEXICON PHARMACEUTICALS, INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: ZHANG, HAIMING, WU, WENXUE
Publication of US20080275099A1 publication Critical patent/US20080275099A1/en
Priority to US12/536,714 priority patent/US8658682B2/en
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Assigned to LEXICON PHARMACEUTICALS, INC. reassignment LEXICON PHARMACEUTICALS, INC. RELEASE BY SECURED PARTY (SEE DOCUMENT FOR DETAILS). Assignors: BIOPHARMA CREDIT PLC
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Definitions

  • This invention relates to solid forms of (E)-1-(4-((1R,2S,3R)-1,2,3,4-tetrahydroxybutyl)-1H-imidazol-2-yl)ethanone oxime and methods of their use for the treatment, prevention and management of various diseases and disorders.
  • the amorphous form of a drug may exhibit different dissolution characteristics and different bioavailability patterns than its crystalline form(s), properties which can affect how the drug must be administered to achieve optimal effect.
  • Amorphous and crystalline forms of a drug may also have different handling properties (e.g., flowability, compressibility), dissolution rates, solubilities and stabilities, all of which can affect the manufacture of dosage forms. Consequently, access to multiple forms of a drug is desirable for a variety of reasons.
  • regulatory authorities e.g., the U.S. Food and Drug Administration
  • Compounds may exist in one or more crystalline forms, but the existence and characteristics of those forms cannot be predicted with any certainty.
  • the compound (E)-1-(4-((1R,2S,3R)-1,2,3,4-tetrahydroxybutyl)-1H-imidazol-2-yl)ethanone oxime affects the sphingosine-1-phosphate pathway, and is believed to be useful in the treatment of diseases such as rheumatoid arthritis and type I diabetes. See U.S. patent application Ser. No. 11/698,253 to Augeri et al., filed Jan. 25, 2007.
  • This invention is directed, in part, to novel solid forms of (E)-1-(4-((1R,2S,3R)-1,2,3,4-tetrahydroxybutyl)-1H-imidazol-2-yl)ethanone oxime:
  • Solid forms include amorphous and crystalline forms.
  • the invention also encompasses dosage forms comprising the solid forms, and methods of their use to manage, treat and prevent a variety of diseases and disorders.
  • FIG. 1 provides a X-ray power diffraction spectrum of a crystalline form of anhydrous (E)-1-(4-((1R,2S,3R)-1,2,3,4-tetrahydroxybutyl)-1H-imidazol-2-yl)ethanone oxime.
  • the spectrum was obtained on a Bruker D8 Advance system using copper K ⁇ radiation, a range of 2-50 degrees 2 ⁇ , a step size of 0.017 degrees 2 ⁇ , and a step time of 103 s with a VANTEC-1 detector.
  • FIG. 2 provides a Raman spectrum of a crystalline form of anhydrous (E)-1-(4-((1R,2S,3R)-1,2,3,4-tetrahydroxybutyl)-1H-imidazol-2-yl)ethanone oxime.
  • the spectrum was obtained on a Bruker RFS100 spectrometer using a 1064 nm Nd:YAG laser (10 mW) for excitation and a germanium detector. The spectrum was measured over the range of 3500-25 cm ⁇ 1 with a resolution of 2 cm ⁇ 1 .
  • FIG. 3 provides a X-ray power diffraction spectrum of a crystalline form of (E)-1-(4-((1R,2S,3R)-1,2,3,4-tetrahydroxybutyl)-1H-imidazol-2-yl)ethanone oxime dihydrate.
  • the spectrum was obtained on a Bruker D8 Advance system using copper K ⁇ radiation, a range of 2-50 degrees 2 ⁇ , a step size of 0.017 degrees 2 ⁇ , and a step time of 103 s with a VANTEC-1 detector.
  • FIG. 4 provides a Raman spectrum of a crystalline form of (E)-1-(4-((1R,2S,3R)-1,2,3,4-tetrahydroxybutyl)-1H-imidazol-2-yl)ethanone oxime dihydrate.
  • the spectrum was obtained on a Bruker RFS100 spectrometer using a 1064 nm Nd:YAG laser (10 mW) for excitation and a germanium detector. The spectrum was measured over the range of 3500-25 cm ⁇ 1 with a resolution of 2 cm ⁇ 1 .
  • FIG. 5 provides a view of a molecule from a crystal structure obtained from a single crystal of (E)-1-(4-((1R,2S,3R)-1,2,3,4-tetrahydroxybutyl)-1H-imidazol-2-yl)ethanone oxime dihydrate.
  • Anisotropic atomic displacement ellipsoids for the non-hydrogen atoms are shown at the 50% probability level. Hydrogen atoms are displayed with an arbitrarily small radius.
  • This invention is directed, in part, to novel solid forms of (E)-1-(4-((1R,2S,3R)-1,2,3,4-tetrahydroxybutyl)-1H-imidazol-2-yl)ethanone oxime, which is a potent suppressor of circulating lymphocytes.
  • the terms “manage,” “managing” and “management” encompass preventing the recurrence of the specified disease or disorder in a patient who has already suffered from the disease or disorder, and/or lengthening the time that a patient who has suffered from the disease or disorder remains in remission.
  • the terms encompass modulating the threshold, development and/or duration of the disease or disorder, or changing the way that a patient responds to the disease or disorder.
  • the terms “prevent,” “preventing” and “prevention” contemplate an action that occurs before a patient begins to suffer from the specified disease or disorder, which inhibits or reduces the severity of the disease or disorder. In other words, the terms encompass prophylaxis.
  • a “prophylactically effective amount” of a compound is an amount sufficient to prevent a disease or condition, or one or more symptoms associated with the disease or condition, or prevent its recurrence.
  • a prophylactically effective amount of a compound means an amount of therapeutic agent, alone or in combination with other agents, which provides a prophylactic benefit in the prevention of the disease.
  • the term “prophylactically effective amount” can encompass an amount that improves overall prophylaxis or enhances the prophylactic efficacy of another prophylactic agent.
  • a solid that is “substantially amorphous” is substantially free of crystalline compound.
  • examples of a substantially amorphous solid compound contain less than about 20, 15, 10, 5, 3 or 1 weight percent crystalline compound.
  • a solid that is “substantially crystalline” is substantially free of amorphous compound.
  • examples of a substantially crystalline solid compound contain less than about 20, 15, 10, 5, 3 or 1 weight percent amorphous compound.
  • a “therapeutically effective amount” of a compound is an amount sufficient to provide a therapeutic benefit in the treatment or management of a disease or condition, or to delay or minimize one or more symptoms associated with the disease or condition.
  • a therapeutically effective amount of a compound means an amount of therapeutic agent, alone or in combination with other therapies, which provides a therapeutic benefit in the treatment or management of the disease or condition.
  • the term “therapeutically effective amount” can encompass an amount that improves overall therapy, reduces or avoids symptoms or causes of a disease or condition, or enhances the therapeutic efficacy of another therapeutic agent.
  • the term “include” has the same meaning as “include, but are not limited to,” and the term “includes” has the same meaning as “includes, but is not limited to.” Similarly, the term “such as” has the same meaning as the term “such as, but not limited to.”
  • one or more adjectives immediately preceding a series of nouns is to be construed as applying to each of the nouns.
  • the phrase “optionally substituted alky, aryl, or heteroaryl” has the same meaning as “optionally substituted alky, optionally substituted aryl, or optionally substituted heteroaryl.”
  • a chemical moiety that forms part of a larger compound may be described herein using a name commonly accorded it when it exists as a single molecule or a name commonly accorded its radical.
  • the terms “pyridine” and “pyridyl” are accorded the same meaning when used to describe a moiety attached to other chemical moieties.
  • the two phrases “XOH, wherein X is pyridyl” and “XOH, wherein X is pyridine” are accorded the same meaning, and encompass the compounds pyridin-2-ol, pyridin-3-ol and pyridin-4-ol.
  • any atom shown in a drawing with unsatisfied valences is assumed to be attached to enough hydrogen atoms to satisfy the valences.
  • chemical bonds depicted with one solid line parallel to one dashed line encompass both single and double (e.g., aromatic) bonds, if valences permit.
  • This invention encompasses solid forms of (E)-1-(4-((1R,2S,3R)-1,2,3,4-tetrahydroxybutyl)-1H-imidazol-2-yl)ethanone oxime.
  • One embodiment of the invention encompasses anhydrous (E)-1-(4-((1R,2S,3R)-1,2,3,4-tetrahydroxybutyl)-1H-imidazol-2-yl)ethanone oxime.
  • the compound is amorphous.
  • the compound is crystalline.
  • a particular crystalline form provides a X-ray powder diffraction (XRPD) pattern with peaks at about 4.7, 8.2, 12.5, 17.1, 19.9, 20.8, 29.3, 32.0 and/or 33.1 degrees 2 ⁇ .
  • XRPD X-ray powder diffraction
  • the relative intensities of peaks in a XRPD pattern can vary depending on how the sample is prepared and how the data is collected.
  • FIG. 1 An example of a Raman spectrum of this crystalline form is provided in FIG. 2 .
  • Another embodiment of the invention encompasses (E)-1-(4-((1R,2S,3R)-1,2,3,4-tetrahydroxybutyl)-1H-imidazol-2-yl)ethanone oxime monohydrate.
  • the compound is amorphous.
  • the compound is crystalline. As measured by differential scanning calorimetry (DSC), a particular crystalline form has a melting point of roughly 153° C. (broad peak).
  • Another embodiment of the invention encompasses (E)-1-(4-((1R,2S,3R)-1,2,3,4-tetrahydroxybutyl)-1H-imidazol-2-yl)ethanone oxime dihydrate.
  • the compound is amorphous.
  • the compound is crystalline.
  • a particular form provides a XRPD pattern with peaks at about 12.5, 14.1, 16.9, 20.4, 25.2 and/or 27.0 degrees 2 ⁇ .
  • An example of a XRPD pattern of this crystalline form is provided in FIG. 3 .
  • An example of a Raman spectrum of this crystalline form is provided in FIG. 4 .
  • This invention encompasses mixtures of crystalline and amorphous forms of the compounds disclosed herein (e.g., mixtures containing less than about 50, 40, 30, 20, 10, 5 or 1 weight percent amorphous material). Also encompassed are mixtures of anhydrous, monohydrate and dihydrate (E)-1-(4-((1R,2S,3R)-1,2,3,4-tetrahydroxybutyl)-1H-imidazol-2-yl)ethanone oxime (e.g., mixtures containing less than about 50, 40, 30, 20, 10, 5 or 1 weight percent anhydrous, monohydrate or dihydrate).
  • This invention encompasses a method of modulating (e.g., increasing) the amount of SIP in a patient (e.g., a mouse, rat, dog, cat or human) in need thereof, which comprises administering to the patient an effective amount of a compound of the invention (i.e., a compound disclosed herein).
  • a patient e.g., a mouse, rat, dog, cat or human
  • a compound of the invention i.e., a compound disclosed herein
  • Another embodiment encompasses a method of reducing the number of T-cells in the blood of a patient, which comprises administering to the patient an effective amount of a compound of the invention.
  • Another embodiment encompasses a method of treating, managing or preventing a disease affected by (or having symptoms affected by) SIP levels, which comprises administering to a patient in need thereof a therapeutically or prophylactically effective amount of a compound of the invention.
  • Another embodiment encompasses a method of suppressing immune response in a patient, which comprises administering to the patient an effective amount of a compound of the invention.
  • Another embodiment encompasses a method of treating, managing or preventing an autoimmune or inflammatory disease or disorder, which comprises administering to a patient in need thereof a therapeutically or prophylactically effective amount of a compound of the invention.
  • diseases and disorders include ankylosing spondylitis, asthma (e.g., bronchial asthma), atopic dermatitis, Behcet's disease, graft-vs-host disease, Kawasaki syndrome, lupus erythematosus, multiple sclerosis, myasthenia gravis, pollinosis, psoriasis, psoriatic arthritis, rheumatoid arthritis, scleroderma, transplant rejection (e.g., of organ, cell or bone marrow), type 1 diabetes, and uveitis.
  • asthma e.g., bronchial asthma
  • atopic dermatitis e.g., Behcet's disease
  • graft-vs-host disease graft
  • Additional diseases and disorders include Addison's Disease, anti-phospholipid syndrome, autoimmune atrophic gastritis, achlorhydra autoimmune, Celiac Disease, Crohn's Disease, Cushing's Syndrome, dermatomyositis, Goodpasture's Syndrome, Grave's Disease, Hashimoto's thyroiditis, idiopathic adrenal atrophy, idiopathic thrombocytopenia, Lambert-Eaton Syndrome, pemphigoid, pemphigus vulgaris, pernicious anemia, polyarteritis nodosa, primary biliary cirrhosis, primary sclerosing cholangitis, Raynauds, Reiter's Syndrome, relapsing polychondritis, Schmidt's Syndrome, Sjogren's Syndrome, sympathetic ophthalmia, Takayasu's Arteritis, temporal arteritis, thyrotoxicosis, ulcerative colitis, and Wegener's granul
  • a compound is administered to a human patient in an amount of about 0.5, 1, 2.5 or 5 mpk.
  • compositions comprising one or more compounds of the invention.
  • Certain pharmaceutical compositions are single unit dosage forms suitable for oral, mucosal (e.g., nasal, sublingual, vaginal, buccal, or rectal), parenteral (e.g., subcutaneous, intravenous, bolus injection, intramuscular, or intraarterial), or transdermal administration to a patient.
  • dosage forms include, but are not limited to: tablets; caplets; capsules, such as soft elastic gelatin capsules; cachets; troches; lozenges; dispersions; suppositories; ointments; cataplasms (poultices); pastes; powders; dressings; creams; plasters; solutions; patches; aerosols (e.g., nasal sprays or inhalers); gels; liquid dosage forms suitable for oral or mucosal administration to a patient, including suspensions (e.g., aqueous or non-aqueous liquid suspensions, oil-in-water emulsions, or a water-in-oil liquid emulsions), solutions, and elixirs; liquid dosage forms suitable for parenteral administration to a patient; and sterile solids (e.g., crystalline or amorphous solids) that can be reconstituted to provide liquid dosage forms suitable for parenteral administration to a patient.
  • suspensions e.g., aqueous
  • the formulation should suit the mode of administration.
  • oral administration requires enteric coatings to protect the compounds of this invention from degradation within the gastrointestinal tract.
  • a formulation may contain ingredients that facilitate delivery of the active ingredient(s) to the site of action.
  • compounds may be administered in liposomal formulations, in order to protect them from degradative enzymes, facilitate transport in circulatory system, and effect delivery across cell membranes to intracellular sites.
  • composition, shape, and type of a dosage form will vary depending on its use.
  • a dosage form used in the acute treatment of a disease may contain larger amounts of one or more of the active ingredients it comprises than a dosage form used in the chronic treatment of the same disease.
  • a parenteral dosage form may contain smaller amounts of one or more of the active ingredients it comprises than an oral dosage form used to treat the same disease.
  • compositions of the invention suitable for oral administration can be presented as discrete dosage forms, such as, but are not limited to, tablets (e.g., chewable tablets), caplets, capsules, and liquids (e.g., flavored syrups).
  • dosage forms contain predetermined amounts of active ingredients, and may be prepared by methods of pharmacy well known to those skilled in the art. See, e.g., Remington's Pharmaceutical Sciences, 18th ed., Mack Publishing, Easton Pa. (1990).
  • Typical oral dosage forms are prepared by combining the active ingredient(s) in an intimate admixture with at least one excipient according to conventional pharmaceutical compounding techniques. Excipients can take a wide variety of forms depending on the form of preparation desired for administration.
  • tablets and capsules represent the most advantageous oral dosage unit forms.
  • tablets can be coated by standard aqueous or nonaqueous techniques.
  • Such dosage forms can be prepared by conventional methods of pharmacy.
  • pharmaceutical compositions and dosage forms are prepared by uniformly and intimately admixing the active ingredients with liquid carriers, finely divided solid carriers, or both, and then shaping the product into the desired presentation if necessary.
  • Disintegrants may be incorporated in solid dosage forms to facility rapid dissolution.
  • Lubricants may also be incorporated to facilitate the manufacture of dosage forms (e.g., tablets).
  • Parenteral dosage forms can be administered to patients by various routes including, but not limited to, subcutaneous, intravenous (including bolus injection), intramuscular, and intraarterial. Because their administration typically bypasses patients' natural defenses against contaminants, parenteral dosage forms are specifically sterile or capable of being sterilized prior to administration to a patient. Examples of parenteral dosage forms include, but are not limited to, solutions ready for injection, dry products ready to be dissolved or suspended in a pharmaceutically acceptable vehicle for injection, suspensions ready for injection, and emulsions.
  • Suitable vehicles that can be used to provide parenteral dosage forms of the invention are well known to those skilled in the art. Examples include, but are not limited to: Water for Injection USP; aqueous vehicles such as, but not limited to, Sodium Chloride Injection, Ringer's Injection, Dextrose Injection, Dextrose and Sodium Chloride Injection, and Lactated Ringer's Injection; water-miscible vehicles such as, but not limited to, ethyl alcohol, polyethylene glycol, and polypropylene glycol; and non-aqueous vehicles such as, but not limited to, corn oil, cottonseed oil, peanut oil, sesame oil, ethyl oleate, isopropyl myristate, and benzyl benzoate.
  • water for Injection USP Water for Injection USP
  • aqueous vehicles such as, but not limited to, Sodium Chloride Injection, Ringer's Injection, Dextrose Injection, Dextrose and Sodium Chloride
  • Transdermal, topical, and mucosal dosage forms include, but are not limited to, ophthalmic solutions, sprays, aerosols, creams, lotions, ointments, gels, solutions, emulsions, suspensions, or other forms known to one of skill in the art. See, e.g., Remington's Pharmaceutical Sciences, 16th and 18th eds., Mack Publishing, Easton Pa. (1980 & 1990); and Introduction to Pharmaceutical Dosage Forms, 4th ed., Lea & Febiger, Philadelphia (1985).
  • Transdermal dosage forms include “reservoir type” or “matrix type” patches, which can be applied to the skin and worn for a specific period of time to permit the penetration of a desired amount of active ingredients.
  • Suitable excipients e.g., carriers and diluents
  • other materials that can be used to provide transdermal, topical, and mucosal dosage forms are well known to those skilled in the pharmaceutical arts, and depend on the particular tissue to which a given pharmaceutical composition or dosage form will be applied.
  • additional components may be used prior to, in conjunction with, or subsequent to treatment with active ingredients of the invention.
  • penetration enhancers may be used to assist in delivering active ingredients to the tissue.
  • the pH of a pharmaceutical composition or dosage form, or of the tissue to which the pharmaceutical composition or dosage form is applied may also be adjusted to improve delivery of one or more active ingredients.
  • the polarity of a solvent carrier, its ionic strength, or tonicity can be adjusted to improve delivery.
  • Compounds such as stearates may also be added to pharmaceutical compositions or dosage forms to advantageously alter the hydrophilicity or lipophilicity of one or more active ingredients so as to improve delivery.
  • stearates can serve as a lipid vehicle for the formulation, as an emulsifying agent or surfactant, and as a delivery-enhancing or penetration-enhancing agent.
  • Different salts, hydrates or solvates of the active ingredients can be used to further adjust the properties of the resulting composition.
  • a polish filtration was performed to afford a clear yellow solution.
  • To this solution was slowly added 50% NaOH aqueous solution at room temperature so that the temperature of the mixture did not exceed 40° C., until the pH reached 7.2 (7.0-7.5).
  • the resulting solution was then heated to 65° C. to form a homogeneous solution, and concentrated under vacuum at 65° C. (60-70° C.) until the solution reached 500 ml (5 ⁇ ) overall volume.
  • the mixture was then cooled to room temperature slowly, further cooled to 0° C., and stirred at 0° C. for 1 h.
  • the solids were collected by filtration and washed with water (0° C., 100 ml, 1 ⁇ ⁇ 2) to afford a white crystalline solid.
  • Example 2 The solid from Example 1 was slurried with EtOH (800 ml, 8 ⁇ ) and heated at 75° C. for 1 h. The resulting mixture was cooled to 0° C. and stirred at 0° C. for 1 h. The white solid was collected by filtration and washed with EtOH (0° C., 100 ml, 1 ⁇ , ⁇ 2) and dried at 50° C. under vacuum to constant weight to give the title compound.
  • the title compound was obtained by drying the crystalline dihydrate from Example 1 under vacuum at 50° C. for about two days.
  • a single crystal structure of (E)-1-(4-((1R,2S,3R)-1,2,3,4-Tetrahydroxybutyl)-1H-imidazol-2-yl)-ethanone oxime dihydrate was obtained using a SMART 1K CCD area detector with a fine-focus sealed tube, MoKa, as the radiation source.
  • the structure solution was obtained using SHELXS-97 (Sheldrick, 1990) software, and SHELXL-97 (Sheldrick, 1997) was used as the refinement program.
  • the refinement technique was full-matrix least-squares on F 2 .
  • the goodness of fit on F 2 was 1.037.
  • the single crystal form exhibited the properties listed in Table 1, below.
  • FIG. 5 provides a view of a molecule of the compound from the crystal structure. Referring to FIG. 5 , select bond lengths are provided in Table 2, and select bond angles are provided in Table 3.

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US12/101,445 2007-04-12 2008-04-11 Solid Forms of (E)-1-(4-((1R,2S,3R)-1,2,3,4-Tetrahydroxybutyl)-1H-imidazol-2-yl)ethanone Oxime Abandoned US20080275099A1 (en)

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US20080262241A1 (en) * 2007-04-12 2008-10-23 Wenxue Wu Methods of Preparing Imidazole-Based Compounds
US20090318516A1 (en) * 2008-06-18 2009-12-24 Hugh Alfred Burgoon Solid forms of (1r,2s,3r)-1-(2-(isoxazol-3-yl)-1h-imidazol-4-yl)butane-1,2,3,4-tetraol and methods of their use
US7825142B2 (en) 2007-03-01 2010-11-02 Lexicon Pharmaceuticals, Inc. Heterocyclic compounds, compositions comprising them and methods of their use

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US7649098B2 (en) * 2006-02-24 2010-01-19 Lexicon Pharmaceuticals, Inc. Imidazole-based compounds, compositions comprising them and methods of their use
TW200920355A (en) * 2007-09-06 2009-05-16 Lexicon Pharmaceuticals Inc Compositions and methods for treating immunological and inflammatory diseases and disorders
EP2537831B1 (en) 2010-02-18 2014-12-03 Daiichi Sankyo Company, Limited Imidazole derivative
JP5757635B2 (ja) 2010-06-28 2015-07-29 第一三共株式会社 培養細胞を用いたs1pリアーゼ阻害剤のスクリーニング方法
US9120835B2 (en) 2011-06-28 2015-09-01 Daiichi Sankyo Company Limited Phosphoric acid ester derivatives

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UA94737C2 (ru) * 2006-02-24 2011-06-10 Лексикон Фармасьютикалз, Инк. Соединения на основе имидазола, композиция, которая их содержит, и их применение

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US20080262241A1 (en) * 2007-04-12 2008-10-23 Wenxue Wu Methods of Preparing Imidazole-Based Compounds

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7825142B2 (en) 2007-03-01 2010-11-02 Lexicon Pharmaceuticals, Inc. Heterocyclic compounds, compositions comprising them and methods of their use
US20080262241A1 (en) * 2007-04-12 2008-10-23 Wenxue Wu Methods of Preparing Imidazole-Based Compounds
US8093280B2 (en) 2007-04-12 2012-01-10 Lexicon Pharmaceuticals, Inc. Methods of preparing imidazole-based compounds
US20090318516A1 (en) * 2008-06-18 2009-12-24 Hugh Alfred Burgoon Solid forms of (1r,2s,3r)-1-(2-(isoxazol-3-yl)-1h-imidazol-4-yl)butane-1,2,3,4-tetraol and methods of their use
US7998994B2 (en) 2008-06-18 2011-08-16 Lexicon Pharmaceuticals, Inc. Solid forms of (1R,2S,3R)-1-(2-(isoxazol-3-yl)-1H-imidazol-4-yl)butane-1,2,3,4-tetraol and methods of their use

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