37 results about "Regadenoson" patented technology

This invention relates to methods for performing myocardial perfusion imaging for diagnosing and characterizing coronary artery disease using an intravenous (IV) bolus injection of regadenoson while the patient is undergoing sub-maximal exercise.

Myocardial imaging methods that are accomplished by administering doses of a pharmaceutical composition including regadenoson—an adenosine A_2A receptor agonist—to a human undergoing myocardial imaging in an amount sufficient to achieve at least a minimal increase in average coronary peak flow velocity.

The invention relates to the field of crystal form preparation, in particular to a preparing method for a regadenoson crystal form E. The preparing method includes the steps that regadenoson and first organic solvent are mixed and purified through reversed-phase high-performance liquid chromatography, and the component with the retention time of 30 min is collected to obtain a first intermediate product; the first intermediate product is mixed with second organic solvent to obtain an organic phase, and a second intermediate product is obtained through concentration; the second intermediate product and DMF are mixed and crystallized to obtain the regadenoson crystal form E. The purity of the regadenoson crystal form E can be improved greatly by means of the preparing method.

This disclosure relates to an improved process for the preparation of regadenoson, pharmaceutically acceptable salts thereof, and hydrates thereof, and for the preparation of intermediates useful in the synthesis of regadenoson. The disclosure also relates to a new crystalline form of regadenoson. Processes for the preparation of the crystalline form, compositions containing the crystalline form, and methods of use thereof are also described.

The present invention relates to the field of medicinal chemistry, and discloses a new crystal form of regadenoson, i.e., a crystal form E of regadenoson, as well as a method for preparing the new crystal form of regadenoson. The crystal form E of regadenoson according to the present invention has excellent performances in terms of radionuclide myocardial perfusion imaging, and has a poor toxicity, good storage stability, and can be used in the preparation of a medicament used as a stress agent for radionuclide myocardial perfusion imaging.

The present invention relates to the field of pharmaceutical chemistry, and discloses a new regadenoson crystal form, ie., regadenoson crystal form E, and a preparation method of the new regadenoson crystal form. According to the present invention, the regadenoson crystal form E has excellent performances in the field of radionuclide myocardial perfusion imaging, has characteristics of weak toxicity and good storage stability, and can be used for preparing drugs for radionuclide myocardial perfusion imaging stress agents.

The invention discloses an alpha isomer impurity of regadenoson and a preparation method and a medicinal use thereof. The impurity is obtained through oriented synthesis; 2,6-dichloropurine and beta-D-1,2,3,5-tetra-o-acetyl-d-ribose are taken as starting raw materials; a salt of alpha 2-chloroadenosine is obtained by concentration, ammonolysis, salifying and purification; the regadenoson alpha isomer impurity is obtained directly through hydrazinolysis, concentration and ammonolysis without dissociation. An isomer is taken as a regadenoson impurity reference substance, so that the content of the impurity produced in synthesis can be effectively identifies, thereby raising the medicine quality standard of regadenoson.

The invention discloses a high performance liquid chromatographic analysis method for related substances of regadenoson. According to the method, a reversed phase column and an ultraviolet detector are adopted, and a 1-alkyl sodium sulfonate solution-methanol is adopted as a flowing phase for gradient elution. By the method, all known impurities in regadenoson raw materials and a preparation can be analyzed at the same time, the content of each known impurity can be effectively controlled by a principal component self-contrast method adopting a correction factor, degrees of separation between each impurity peak as well as between a major peak and an adjacent impurity peak are all more than 1.5, and the peak impurity of the major peak and each impurity peak is higher than 1.0. A simple and reliable analysis method is provided for quality control over the regadenoson raw materials and the preparation.

The invention discloses a method for controlling non-invasive brain entry of magnetic nano particles on the basis of a cell drug loading technology. The method comprises a preparation technology of cell (such as red blood cells and neutrophile granulocyte) wrapped magnetic nano particles, a blood brain barrier overcoming technology and a gradient magnetic field positioning and treatment technology. The preparation technology of the cell wrapped magnetic nano particles comprises the steps of hypotonic dilution and isotonic sealing; the blood brain barrier overcoming technology relies mainly onA2a adenosine receptor agonist drugs such as regadenoson; and a gradient magnetic field uses a principle of an electromagnetic effect and is generated by supplying current to a plurality of turns of coils located on an iron core. Magnetic cells of the technology have good magnetism and biocompatibility; accurate targeting and long-time retention of the magnetic cells in a body can be achieved through focusability of the gradient magnetic field; the magnetic nano particles can be positioned in a specific brain area by opening a blood brain barrier; a reaction can be generated in the brain through a pulse magnetic field; and accurate loading of the magnetic nano particles is achieved.

The present invention discloses a regadenoson purification method, which comprises: under the effect of an alkali water solution, mixing an impurity A-containing regadenoson crude product and a polar organic solvent, and crystallizing, wherein the impurity A content in the regadenoson crude product is 0.1-1.0%. According to the present invention, with the purification method, the impurity A in the regadenoson crude product can be effectively removed, the impurity A content in the obtained regadenoson product is less than 0.10%, and the lowest content is less than 0.04%, such that the HPLC purity of the regadenoson product is further improved, the HPLC purity of the finally-obtained regadenoson product is more than 99.80%, the product quality is good, and impurity limit standard of ICH Q3a is completely met. The formula of the impurity A is represented in the specification.

The present invention relates to novel pharmaceutical compositions of Regadenoson and its pharmaceutically acceptable salts, solvates or hydrates in the form of solution, wherein the compositions are free from phosphate buffer and EDTA. Further the invention relates to pharmaceutical composition of Regadenoson comprising a tonidty modifier.

The invention belongs to the field of pharmaceutical chemical engineering and relates to 2-hydrazino adenosine and a preparation method thereof. According to the method disclosed by the invention, a chemical compound shown as a formula II reacts with hydrazine hydrate in the presence or the absence of a polar solvent and the reaction formula is shown as follows. The 2-hydrazino adenosine crystal prepared by adopting the method is high in yield, high in purity and low in cost; the method has the advantages of being friendly to the environment, simple and convenient to operate and easy in industrial scale-up and has a very good industrial application prospect; and the 2-hydrazino adenosine can be used for preparing an adenosine receptor agonist, i.e. regadenoson.

The present invention provides novel processes for the preparation of regadenoson having the formula (I). In some embodiments, the intermediates for the synthesis of regadenoson are also provided.

The present invention relates to parenteral pharmaceutical formulation of Regadenoson comprising of Regadenoson, one or more cyclodextrins and pharmaceutically acceptable excipients.

The invention relates to a regadenoson purifying method and a new crystal form of regadenoson. The method comprises the following steps that a regadenoson crude product is heated and dissolved in a mixed solvent, and then stirring cooling, crystallization, filtering and drying are conducted, wherein the mixed solvent is selected from mixed solvents of ethanol, methanol, acetonitrile and water; orthe method comprises the following steps that the regadenoson crude product is heated and dissolved in a good solvent, then a poor solvent is added, and stirring cooling, crystallization, filtering and drying are conducted, wherein the good solvent is selected from DMF, NMP and sulfolane or a mixture of the DMF, NMP and sulfolane, and the poor solvent is selected from ethanol, methanol and water or a mixture of the ethanol, methanol and water.