35 results about "Macitentan" patented technology

The invention discloses a macitentan orally disintegrating tablet and a preparation method thereof. The orally disintegrating tablet is a drug mixture comprising macitentan, flavoring agent, filler, disintegrating agent, lubricant, wetting agent and binder, wherein the physiologically active ingredient macitentan is The weight percentage of disintegrating tablets is 5-10%. The solid pharmaceutical preparation provided by the invention adopts solid dispersion technology. By mixing and grinding the main drug and the filler, the solubility of the main drug is improved, the dissolution effect is improved, and the dissolution rate of the preparation is ensured. High content uniformity and high bioavailability. In addition, the macitentan orally disintegrating tablet with convenient administration, rapid onset of effect and high bioavailability of the present invention can improve the drug compliance of patients and is beneficial to the treatment of diseases.

The invention discloses a method for preparing macitentan. The method comprises the following steps: (1) carrying out a substitution reaction between a compound N-propanesulfonamide of a formula (II) and a compound 5-(4-bromophenyl)-4,6-dichloropyrimidine of a formula (III) so as to convert into a compound of a formula (IV); (2) carrying out a substitution reaction between the compound of the formula (IV) and a compound of a formula (V) in the presence of a strong base, thereby obtaining a compound of a formula (VI); and (3) carrying out a substitution reaction between the compound of the formula (VI) and a compound of a formula (VII) in the presence of a strong base, thereby obtaining the compound (macitentan) of the formula (I). The process conditions of the method for preparing macitentan are mild, the reaction time is greatly shortened, the after-treatment is simple, the purity is high, the reaction cost is low, and the industrial production is easily realized.

The invention discloses a high performance liquid chromatography method of macitentan related substances. The method adopts a reversed phase chromatographic column and an ultraviolet detector, and adopts acetonitrile-water-formic acid as a mobile phase to carry out gradient elution. The method can be used to simultaneously analyze all known impurities in a macitentan raw material and preparations thereof, and also allows the content of the known impurities to be effectively controlled through a correction factor-containing main component self-contrasted technology, the resolution among all impurity peaks and the resolution between a main peak and an adjacent impurity peak are respectively greater than 1.5, and the peak purities of the main peak and all the impurity peaks are 1.0. The method is a simple and reliable analysis method for quality control of the macitentan raw material and the preparations thereof.

The invention discloses a method for preparing macitentan. The method comprises a following synthesis route. As a result of experiments, the method provided by the invention has the advantages of simple operation, mild reaction conditions, low requirement on equipment, inexpensive and easy-to-obtain raw materials, and low production cost. The method can be easily applied in large-scale productions. The method meets the requirements of macitentan industrialized production, and has industrial application value.

The invention discloses a method for refining high-purity macitentan. The method comprises the steps of heating and dissolving crude macitentan by using a newly-boiled solvent in the absence of light, adding active carbon to perform decoloration for 5-15 min, performing filter pressing while the solution is hot, cooling filtrate to 45-55 DEG C in the absence of light and performing crystallization for 1-2 h with stirring, performing cooling to 20-30 DEG C to perform crystallization for 1-2 with stirring, and performing filtration and drying to obtain pure macitentan. The method has the advantages that the method is simple and convenient to operate and high in yield and the product is pure, the yield is 85% or above, and the purity of pure macitentan is 99.9% or above (according to high performance liquid chromatography (HPLC) detection).

The disclosure relates to an endothelin receptor antagonist for use in the prevention or treatment of brain metastases in combination with a cytotoxic chemotherapy agent, radiotherapy or both. The endothelin receptor antagonist may for example be bosentan, macitentan or a mixture of bosentan and macitentan.

The invention provides a detection method for a macitentan intermediate and application thereof. The intermediate is N-propylamino sulfonamide or its salt. The method is characterized in that it employs high performance liquid chromatography to conduct detection, the detector is an evaporative light scattering detector (ELSD), and the mobile phase contains an alkaline additive of certain proportion. The invention also provides application of the detection method. The detection method provided by the invention can fully separate the main component from other materials very well, and can accurately determine the content of impurities. The method has the advantages that: the sample dissolving speed is fast, the same can be completely dissolved within 1min, and the analysis time is generally within 30min; preparation of the mobile phase is simple in operation; the N-propylamino sulfonamide detection limit of the method is 15.75ng, and the sensitivity is high; with the method, the recovery rate of N-propylamino sulfonamide is more than 90%, and the average recovery rate can reach 98.16%, thus meeting the quantitative determination requirements of N-propylamino sulfonamide. In addition, the prepared solution is stable when it is determined within 36h. In summary, the analysis method is stable and reliable, and has high sensitivity.

The invention discloses a method for preparing a macitentan impurity standard substance. The method includes the steps of using 5-(4-bromophenyl)-4,6-dichloropyrimidine as a raw material, conducting condensation of 5-(4-bromophenyl)-4,6-dichloropyrimidine, N-propanesulfonamide and ethylene glycol to prepare a 1,2-di[[N-[5-(4-bromophenyl)]-N'-propanesulfonamide-6-oxo]pyrimidyl] ethyl diether crude product, refining the crude product to obtain a pure product, and calibrating the content of the pure product by a conventional analysis method. The method has a simple process and a short preparation period, and the calibrated product content is more than 99.0%. The provided macitentan impurity can serve as the impurity standard substance and be applied to qualitative and quantitative research and detection of impurities in macitentan raw materials and preparations thereof.

The present invention relates to a new crystalline form of macitentan, which has advantages in terms of solubility. The present invention also relates to the preparation method of the new crystal form, its pharmaceutical composition and its use in the preparation of medicines for treating hypertension and pulmonary arterial hypertension.

The invention provides a macitentan microsphere preparation and a preparation method thereof. The macitentan microsphere provided by the invention consists of macitentan, a polymer carrier material, an emulsifier and a stabilizer. The preparation method of the macitentan microsphere preparation provided by the invention comprises the following steps: (1) dissolving the polymer carrier material and the macitentan in an oil-phase solvent so as to obtain an oil phase, and taking a water solution of the emulsifier as an aqueous phase; (2) adding the oil phase to the aqueous phase and conducting homogenizing so as to obtain an O / W emulsion; (3) adding the emulsion to a water solution of the stabilizer, so that the solvent of the oil phase completely volatilizes; and (4) separating, washing and drying the microsphere so as to obtain the microsphere preparation provided by the invention.

The present invention relates to a macitentan crystal form and a preparation method thereof, wherein the characteristic absorption peaks exist when the diffraction angle (2[theta]) is 11.32+ / -0.2, 12.94+ / -0.2, 15.98+ / -0.2, 18.05+ / -0.2, 18.46+ / -0.2, 21.94+ / -0.2, 23.32+ / -0.2, 25.28+ / -0.2, 26.50+ / -0.2, 28.42+ / -0.2, and 31.06+ / -0.2 in the X-ray powder diffraction pattern of the crystal form. The macitentan crystal form prepared by using the method of the present invention has characteristics of good stability, simple operation, easy production, and easy storage.

The present invention relates to a topical ophthalmic formulation comprising at least one antagonist of the endothelin receptor, preferably selected from sitaxentan, ambrisentan, atrasentran, bosentan, macitentan and tezosentan, or a mixture thereof, more preferably bosentan. It also relates to the use of a topical ophthalmic formulation comprising at least one antagonist of the endothelin receptor, preferably selected from sitaxentan, ambrisentan, atrasentran, bosentan, macitentan and tezosentan, or a mixture thereof, more preferably bosentan, as active ingredient for preventing and / or treating the retinal neurodegeneration induced by diabetes and / or aging.

The present invention relates to an improved process for the preparation of macitentan and pharmaceutical acceptable salts thereof. Further present invention also relates to methylene chloride solvate of macitentan and their use in the preparation of pure macitentan.

The present invention provides methods for treating portopulmonary hypertension, comprising administering to a patient in need thereof, a therapeutically effective amount of macitentan. Preferably, the methods are clinically proven safe and / or effective. Also provided are methods of improving liver transplant perioperative mortality risk category, improving MELD exception eligibility, and reducing the risk of removal from a liver transplant waitlist in a patient with portopulmonary hypertension and liver disease, comprising administering to a patient in need thereof a therapeutically effective amount of macitentan.

The invention relates to a macitentan solution for inhalation and a preparation method of the macitentan solution. The macitentan solution comprises an active ingredient macitentan, a stabilizer, an isoosmotic adjusting agent, a pH value adjusting agent and a solvent. The single dose specification of the macitentan solution for inhalation is 2ml, and the macitentan solution is accurate in meteringand good in curative effect; and the macitentan solution has the advantages of no preservatives, stable quality, few side reactions and the like.

Macitentan related substances shown as a formula (I), uses thereof as macitentan impurity reference substances and a high performance liquid chromatography method for separation and measurement of macitentan and the compounds of the formula (I). Preparing methods provided are mild in reaction condition and simple in after-treatment, and can prepare the compounds of the formula (I) with purity meeting requirements in a large scale, with the compounds being adopted as impurity reference substances in macitentan quality analysis.

The present invention relates to technical field of chemical synthesis of drugs, and provides a preparation method of Macitentan and intermediate compound thereof. Adding. THF solution containing compound II and 5-bromo-2-chloropyrimidine slowly into THF solution containing base to react, or adding THF solution containing compound II and THF solution containing 5-bromo-2-chloropyrimidine slowly at the same time into THF solution containing base to react and obtain Macitentan (shown as compound I), wherein the base is selected from sodium hydride, potassium hydride, lithium hydride or lithium bis(trimethylsilyl)amide. The selectivity of the preparation method is very good, which is suitable for industrial production. The obtained product Macitentan has good quality and high yield. And the product compound II also has good quality and high yield, its HPLC purity is up to 99.0%, the content of impurity A is less than 0.20%, the content of impurity B is less than 0.25%.

The invention discloses a preparation method of n-propylamine sulfonamide serving as a macitentan intermediate. The preparation method comprises the following steps: by taking n-propylamine and sulfonyl chloride as start raw materials and taking triethylamine as an acid-binding agent, preparing an n-propylamine sulfonamide coarse product through two-step reaction, and performing post-treatment distillation, so as to obtain the n-propylamine sulfonamide. According to the preparation method disclosed by the invention, raw materials which are low in cost and readily available are used; reactions and operations in all the steps are simple; the reaction steps and the reaction time are short; the n-propylamine sulfonamide is easy to popularize, high in yield, low in cost and suitable for industrial large-scale production.