| GE HEALTHCARE AS Patent applications |
| Patent application number | Title | Published |
|---|
| 20120083625 | PREPARATION OF IODIXANOL - A process for the preparation of iodixanol by dimerisation of 5-acetamido-N,N′-bis (2,3-dihydroxypropyl)-2,4,6-triiodo-isophthalamide (“Compound A”) in which, after the dimerisation step, unreacted Compound A is precipitated from the reaction mixture and recovered for re-use. The process substantially increases the net yield of iodixanol and simplifies its purification. | 04-05-2012 |
| 20120020882 | PEPTIDE-BASED COMPOUNDS - The invention relates to new peptide-based compounds for use as diagnostic imaging agents or as therapeutic agents wherein the agents comprise targeting vectors which bind to integrin receptors. | 01-26-2012 |
| 20110318273 | FLUORESCENT CONTRAST AGENTS - The invention relates to contrast agents for imaging of diseases associated with inflammations. More specifically the invention provides optical imaging contrast agents for imaging of activated leukocytes and methods for imaging of such. The contrast agent changes its fluorescent properties upon reaction with oxidants produced by the activated leukocytes. | 12-29-2011 |
| 20110263975 | FLUORESCENT PROBES HAVING A POLYMERIC BACKBONE - The present invention relates to quenched fluorescent probes which arc activated by biochemical processes. The probes are designed such that intramolecular quenching occurs in the unactivated probe, but that the quencher moieties are cleaved from the probe under defined conditions rendering the probe fluorescent. Also disclosed are optical imaging agents suitable for in vivo imaging comprising the probes, as well as pharmaceutical compositions and kits, as well as in vivo imaging methods. | 10-27-2011 |
| 20110207963 | PREPARATION OF IODIXANOL - A process for the preparation of iodixanol by dimerisation of 5-acetamido-N,N′-bis(2,3-dihydroxypropyl)-2,4,6-triiodo-isophthalamide (“Compound A”) in which, after the dimerisation step, unreacted Compound A is precipitated from the reaction mixture and recovered for re-use. The process substantially increases the net yield of iodixanol and simplifies its purification. | 08-25-2011 |
| 20110021834 | CONTINUOUS PROCESS OF PREPARING INTERMEDIATE FOR NON-IONIC X-RAY CONTRAST AGENTS - This invention relates to an improved method for the synthesis of 5-amino-N,N′-bis(2,3-dihydroxypropyl)-2,4,6-triiodoisophthalamide (Compound B), an intermediate in the industrial preparation of non-ionic X-ray contrast agents. In particular, it relates to a continuous process of the iodination reaction followed by the purification of Compound B. | 01-27-2011 |
| 20110021833 | CRYSTALLIZATION OF AN INTERMEDIATE FOR SYNTHESIZING NON-IONIC X-RAY CONTRAST AGENTS - This invention relates generally to the crystallization process of 5-amino-N,N′-bis(2,3-dihydroxypropyl)-2,4,6-triiodo-1,3-benzenedicarboxamide (“Compound B”), an iodinated intermediate in the preparation of non-ionic X-ray contrast agents. The instant process utilizes a nanofiltration system to pass through low molecular weight salt, thereby reducing the solubility of Compound B in the retentate. This process increases supersaturation of the mother liquor and improves crystal growth in the crystallization following the initial one. The process of the present invention is useful in increasing the overall crystallization yield of Compound B in an industrial manufacturing process. | 01-27-2011 |
| 20110021832 | SYNTHESIS OF IODIXANOL IN WATER - This invention relates to the synthesis of iodixanol (1,3-bis(acetamido)-N,N′-bis[3,5-bis(2,3-dihydroxypropylaminocarbonyl)-2,4,6-triiodophenyl]-2-hydroxypropane), more specifically to the dimerisation of 5-acetamido-N,N′-bis(2,3-dihydroxypropyl)-2,4,6-triiodo-isophthalamide with water as solvent. | 01-27-2011 |
| 20110021831 | SYTNHESIS OF IODIXANOL IN 1-METHOXY-2-PROPANOL AND WATER OR METHANOL - This invention relates to the synthesis of iodixanol (1,3-bis(acetamido)-N,N′-bis[3,5-bis(2,3-dihydroxypropylaminocarbonyl)-2,4,6-triiodophenyl]-2-hydroxypropane), more specifically to the dimerisation of 5-acetamido-N,N′-bis(2,3-dihydroxypropyl)-2,4,6-triiodo-isophthalamide with a solvent mixture comprising 1-methoxy-2-propanol and water or methanol. | 01-27-2011 |
| 20110021830 | SYTNHESIS OF IODIXANOL IN PROPYLENEGLYCOL - This invention relates to the synthesis of iodixanol (1,3-bis(acetamido)-N,N′-bis[3,5-bis(2,3-dihydroxypropylaminocarbonyl)-2,4,6-triiodophenyl]-2-hydroxypropane), more specifically to the dimerisation of 5-acetamido-N,N′-bis(2,3-dihydroxypropyl)-2,4,6-triiodo-isophthalamide with propyleneglycol as solvent. | 01-27-2011 |
| 20110021829 | SYTNHESIS OF IODIXANOL IN METHANOL - This invention relates to the synthesis of iodixanol (1,3-bis(acetamido)-N,N′-bis[3,5-bis(2,3-dihydroxypropylaminocarbonyl)-2,4,6-triiodophenyl]-2-hydroxypropane), more specifically to the dimerisation of 5-acetamido-N,N′-bis(2,3-dihydroxypropyl)-2,4,6-triiodo-isophthalamide with methanol as solvent. | 01-27-2011 |
| 20110021828 | RECOVERING UNREACTED INTERMEDIATE FROM DESALINATED AND DESOLVENTIZED DIMERISATION REACTION MIXTURE BY ULTRAFILTRATION - This invention relates generally to industrial preparation of iodixanol (1,3-bis(acetamido)-N,N′-bis[3,5-bis(2,3-dihydroxypropylaminocarbonyl)-2,4,6-triiodophenyl]-2-hydroxypropane), a non-ionic X-ray contrasting agent. It further relates to a method of recovering intermediate 5-acetamido-N,N-bis(2,3-dihydroxypropyl)-2,4,6-triiodoisophthalamide (“Compound A”) from the desalinated and desolventized dimerisation reaction mixture. In particular, the present invention employs ultrafiltration to recover non-crystalline Compound A to reduce the overall cost of iodixanol manufacture, increase the yield of iodixanol, and facilitate the subsequent purification procedures to meet the regulatory purity requirement of iodixanol. | 01-27-2011 |
| 20110021827 | CRYSTALLIZATION OF IODIXANOL USING ULTRASOUND - This invention relates to the manufacture of iodixanol (1,3-bis(acetamido)-N,N′-bis[3,5-bis (2,3-dihydroxypropylaminocarbonyl)-2,4,6-triiodophenyl]-2-hydroxypropane), more specifically to the purification of iodixanol by crystallization by using ultrasound. | 01-27-2011 |
| 20110021826 | CRYSTALLIZATION OF IODIXANOL USING MILLING - This invention relates to the manufacture of iodixanol(1,3-bis(acetamido)-N,N′-bis[3,5-bis(2,3-dihydroxypropylaminocarbonyl)-2,4,6-triiodophenyl]-2-hydroxypropane), more specifically to the purification of iodixanol by crystallization by using wet milling. | 01-27-2011 |
| 20110021825 | PROCESS FOR ISOLATING IODIXANOL FROM AN AQUEOUS SOLUTION - This invention relates to the isolation of iodixanol (1,3-bis(acetamido)-N,N′-bis[3,5-bis(2,3-dihydroxypropylaminocarbonyl)-2,4,6-triiodophenyl]-2-hydroxypropane), more specifically to the isolation of iodixanol from an aqueous solution. | 01-27-2011 |
| 20110021824 | ADSORPTIVE PURIFICATION METHOD FOR IODIXANOL - This invention relates generally to non-ionic X-ray contrast agents. It further relates to a method of using solid adsorbents to reduce backpeaks content in the purification of iodixanol. In particular, it relates to the use of non-polar organic adsorbents with the average pore diameter smaller than about 30 nm. Specific examples of adsorbents of the instant invention include non-polar acrylic ester, di-vinyl benzene resins, poly-styrene di-vinyl benzene resins, and carbon adsorbents. In certain embodiments, upwards of 30% of the backpeak levels and 60% N-acetyl cyclic iodixanol levels are reduced for a 5% loss of iodixanol. | 01-27-2011 |
| 20110021823 | PROCESSING CRUDE IODIXANOL MIXTURE BY NANOFILTRATION - This invention relates generally to industrial preparation of iodixanol (1,3-bis(acetamido)-N,N′-bis[3,5-bis(2,3-dihydroxypropylaminocarbonyl)-2,4,6-triiodophenyl]-2-hydroxypropane), a non-ionic X-ray contrasting agent. It further relates to a method for preparing a crude mixture of the dimerisation reaction from 5-acetamido-N,N-bis(2,3-dihydroxypropyl)-2,4,6-triiodoisophthalamide (“Compound A”) to iodixanol for the crystallization of iodixanol. In particular, it relates to an industrial procedure of simultaneously reducing the salt content and the alcoholic dimerisation solvent using a nanofiltration system prior to the crystallization of iodixanol. | 01-27-2011 |
| 20110021822 | CONTINUOUS DEACETYLATION AND PURIFICATION PROCESS IN SYNTHESIS OF NON-IONIC X-RAY CONTRAST AGENTS - This invention relates to an improved method for the synthesis of 5-acetamido-N,N′-bis(2,3-dihydroxypropyl)-2,4,6-triiodoisophthalamide (“Compound A”), an intermediate in the industrial preparation of non-ionic X-ray contrast agents. In particular, it relates to a continuous process of deacetylation of the acetylated hydroxyl group in 5-amino-N,N′-bis(2,3-dihydroxypropyl)-2,4,6-triiodo-1,3-benzenedicarboxamide (“Compound B”) followed by crystallisations, filtration, and washing of Compound A. | 01-27-2011 |
| 20110021821 | CONTINUOUS ACETYLATION PROCESS IN SYNTHESIS OF NON-IONIC X-RAY CONTRAST AGENTS - This invention relates to an improved method for the synthesis of 5-acetamido-N,N′-bis(2,3-dihydroxypropyl)-2,4,6-triiodoisophthalamide (“Compound A”), an intermediate in the industrial preparation of non-ionic X-ray contrast agents. In particular, it relates to a continuous process of acetylation of 5-amino-N,N′-bis(2,3-dihydroxypropyl)-2,4,6-triiodo-1,3-benzenedicarboxamide (“Compound B”) followed by the removal of acetic anhydride. | 01-27-2011 |
| 20110021814 | METHOD FOR REDUCING AMINOISOPHTHALIC ACID BISAMIDE RELATED IMPURITIES IN PREPARATION OF NON-IONIC X-RAY CONTRAST AGENTS - This invention relates generally to the preparation of non-ionic X-ray contrast agents, iohexol, ioversol, and iodixanol. It further relates to a method for improving the purity of 5-amino-N,N′-bis(2,3-dihydroxypropyl)-isophthalamide (or ABA), an intermediate in the industrial preparation of these non-ionic X-ray contrast agents. In particular, it relates to a method for significantly removing ABA monomethylester and ABA dimer from ABA by hydrolyzing ABA under a pH between about 12 to about 13 in an aqueous medium to convert ABA monomethylester to ABA monoacid, before the iodination reaction of ABA. | 01-27-2011 |
| 20110020238 | STABILIZING AQUEOUS SOLUTION OF IODINE CHLORIDE BY ADDING SODIUM CHLORIDE - This invention relates generally to non-ionic X-ray contrast agents. It further relates to the preparation of iodine chloride, a key reagent in the synthesis of non-ionic X-ray contrast agents such as iodixanol and iohexol. In particular, the iodine chloride is produced in a reaction involving iodine, sodium chlorate, and hydrochloric acid as the starting materials. The instant invention relates to a method of stabilizing aqueous iodine chloride solutions by adding about one to about four molar equivalents of sodium chloride relative to sodium chlorate to an aqueous reaction mixture of sodium chlorate, hydrochloric acid, and iodine. | 01-27-2011 |
| 20110017673 | ENDOTOXIN REMOVAL IN CONTRAST MEDIA - This invention relates to the manufacture of contrast media, and more specifically to the removal of endotoxins in such contrast media. | 01-27-2011 |
| 20100234611 | Fluorination Process of Anilide Derivatives and Benzothiazole Fluorinate Derivatives as in VIVO Imaging Agents - The invention relates to a process for preparation of a compound of formula (I): R | 09-16-2010 |
| 20100111865 | CONTRAST AGENTS - The present invention provides novel compounds and pharmaceutical compositions containing such compounds, wherein the compounds have affinity for proteoglycans. The compounds comprise an amino acid based core unit linked to positively charged moieties. The compounds further comprise at least one imaging moiety detectable in in vivo imaging making the compounds useful as diagnostic contrast agents for imaging of proteoglycans, such as heparan sulphate proteoglycans. | 05-06-2010 |
| 20100076199 | PROCESS FOR THE PREPARATION OF SUBSTITUTED PYRIDONE CARBOXYLIC ACIDS - The present invention relates to methods for the preparation of pyridone carboxylic acids for use as intermediates in the preparation of various synthetic organic compounds. The pyridone carboxylic acids can for example be used as intermediates in the production of potent antitumor agents, antifungal agents, antiviral agents, psychotherapeutic agents or contrast imaging agents for MRI. | 03-25-2010 |
| 20100069669 | Preparation of Iodixanol - A process for the preparation of iodixanol by dimerisation of 5-acetamido-N,N′-bis(2,3-dihydroxypropy1)-2,4,6-triiodo-isophthalamide (“Compound A”) in which, after the dimerisation step, unreacted Compound A is precipitated from the reaction mixture and recovered for re-use. The process substantially increases the net yield of iodixanol and simplifies its purification. | 03-18-2010 |
| 20100056787 | CHELATING AGENTS - The present invention relates to chelating agents, in particular to chelating agents which are capable of forming complexes with paramagnetic metal ions such as iron (III) and gadolinium (III). The invention also relates to the complexes formed and their use as MRI contrast agents. | 03-04-2010 |
| 20090155184 | MAGNETIC RESONANCE IMAGING METHOD - The present invention relates to a magnetic resonance imaging (MRI) method, in particular to a MRI method enabling early detection of myocardial ischemia. | 06-18-2009 |
| 20090118540 | Method For Producing Pyruvic Acid - The invention relates to a method for the production of pyruvic acid. | 05-07-2009 |
| 20090004119 | Polymers - The present invention relates to novel linear polymers, compositions comprising said polymers and their use as contrast agents in magnetic resonance (MR) imaging (MRI) and magnetic resonance spectroscopy (MRS). | 01-01-2009 |
| 20080287711 | Purification of Iodixanol - A process for the manufacture of iodixanol by performing a purification process of the crude product in a solvent comprising ethanol. The crude product may be obtained in aqueous solution from dimerisation of 5-acetamido-N,N′-bis(2,3-dihydroxypropyl)-2,4,6-triiodo-isophthalamide (“Compound A”). | 11-20-2008 |
| 20080267881 | IMAGING AGENTS - The invention relates to compounds of formula (I): and their use as targeting vectors that bind to receptors associated with angiogenesis. Such compounds may thus be used for diagnosis or therapy of, for example, malignant diseases, heart diseases, endometriosis, inflammation-related diseases, rheumatoid arthritis and Kaposi's sarcoma. | 10-30-2008 |
| 20080260651 | CONTRAST AGENTS - The present invention relates to a class of compounds and to diagnostic compositions containing such compounds where the compounds are iodine containing compounds. More specifically the iodine containing compounds are chemical compounds containing an aliphatic N-heterocyclic central moiety such as pyrrolidine or piperidine heterocycles allowing for the arrangement of three iodinated phenyl groups bound thereto. | 10-23-2008 |
| 20080214867 | Continuous Crystallisation Process of Iodinated Phenyl Derivatives - The invention describes a process for the purification of iodinated aryl compounds where the purification is performed by continuous crystallisation of a crude product in a solvent with addition of anti-solvent. The continuous crystallisation process is performed in one or more crystallisers at a temperature up to the boiling point of the content of the crystalliser. | 09-04-2008 |
