41 results about "Bosentan" patented technology

Stable acid addition salts of bosentan useful for the purification of bosentan base; the salts are in solid state and the starting acid has a pKa lower than 3.

Novel polymorphic forms of bosentan and processes for their preparation are disclosed. Further, pharmaceutical compositions comprising said polymorphic forms and the use of said compositions in the treatment of patients suffering from endothelin receptor mediated disorders, for example, cardiovascular disorders such as hypertension, pulmonary hypertension, ischemia, vasospasm and angina pectoris are disclosed.

The present invention relates to processes for the preparation of an endothelial receptor antagonist. The present invention particularly relates to synthesis of 4-tert-butyl-N-[6-(2-hydroxyethoxy)-5-(2-methoxyphenoxy)-2-(2-pyrimidinyl)-4-pyrimidinyl]benzene sulfonamide (bosentan).

The present invention relates to an improved process for preparing Bosentan of formula (I).

Provided are an extended release preparation for oral administration of bosentan including bosentan, a pharmaceutically acceptable salt thereof or a solvate thereof as an active ingredient and a hydrophilic polymer as a sustained release excipient, and a method of manufacturing the same. Accordingly, the number of administrations of the bosentan, a pharmaceutically acceptable salt thereof or a solvate thereof may be reduced, thereby enhancing ease of administration and patient compliance. In addition, the extended release preparation for oral administration of bosentan may be effectively manufactured.

A process for the purification of Bosentan sodium and a novel crystalline form of substantially pure Bosentan sodium to disclosed in this invention.

The invention relates to a preparation method of small-particle-size bosentan, and belongs to the technical field of raw material medicine preparation. According to a purifying method of the small-particle-size bosentan, firstly, an bosentan crude product is dissolved in dichloromethane, and filtering is conducted; filter liquid is cooled to 0 to 5 DEG C, the temperature is maintained, and 50-60%ethanol water with volume 1.8-3 times of that of the solvent in the first step is added in a flowing mode; stirring speed is 220-250 rpm, the speed of adding the ethanol water in a flowing mode is 10-15 ml/min, and after flowing adding is completed, stirring is conducted continuously for 4-5 hours; filtering is conducted, 50-60% ethanol water is used for washing filter cake, and drying is conducted. The invention provides the preparation method of the small-particle-size bosentan. The prepared bosentan D90 can be controlled to be between 16.89 micrometers and 32.56 micrometers, and a raw material medicine which can be used directly is provided for an bosentan preparation.

The invention relates to a pharmaceutical composition of Bosentan, and dissolution rate of the composition is increased, thereby improving stability of the preparation; the invention also relates to the preparation method of the Bosentan pharmaceutical composition, and the preparation method is simple and easy to be operated, and is suitable for industrial production.

The invention relates to the technical field of pharmacy, in particular to a bosentan tablet composition and a preparation method thereof. The bosentan tablet composition is prepared from the following components in parts by mass: 65 to 130 parts of bosentan main medicine, 65 to 130 parts of sodium bicarbonate, 55 to 100 parts of skeleton material, 12 to 24 parts of disintegrating agent, 2 to 5 parts of flow aid, 2 to 5 parts of lubricant and 0.1 to 1.2 parts of enteric coating material. The lubricant, the enteric coating material, the disintegrating agent and the sodium bicarbonate are addedin the bosentan tablet composition, so that the water dissolution rate is effectively increased, the bioavailability of the medicine is improved and the untoward effect on the stomach after use is reduced. Granules prepared by the preparation method are uniform in granularity and high in flowability, loose tablets, sticking and astringent flushing phenomena of the tablets are avoided, the hardnessof the tablet can reach to above 5 kg and the preparation is suitable for coating operation; and the sodium bicarbonate is added, so that the pH value is increased, dissolution of the bosentan main medicine is benefited and the bioavailability is improved.

The invention relates to a bosentan solid pharmaceutical composition and a preparation method thereof, and belongs to the technical field of pharmacy. According to the technical scheme, the bosentan solid pharmaceutical composition comprises a bosentan solid dispersion, a filling agent, a suspending aid, a sweetening agent, buffer salt, a flavoring agent and a lubricating agent, and the bosentan solid dispersion is prepared through a hot melt extrusion method. The invention overcomes the defect of poor use compliance of children in the prior art, and has a good clinical application prospect. The preparation method is simple and convenient, is suitable for industrial production, and has great practical value.

The invention discloses a medicine for treating atrophic gastritis. The medicine for treating atrophic gastritis mainly comprises, by weight, 8-14 parts of lamivudine, 5-10 parts of artemisinin, 5-7 parts of triazolam, 6-10 parts of polyvinylpyrrolidone, 0.04-0.15 part of scopoletin , 2-7 parts of bosentan, 4-8 parts of metronidazole, 1-3 parts of biotin, 4-6 parts of bismuth subnitrate and 10-20 parts of sodium bicarbonate. The medicine for treating atrophic gastritis has the advantages that the medicine, which is a western medicine compound preparation, is reasonable in formula, remarkably effective through clinical experiment results and capable of treating symptoms of the atrophic gastritis effectively; the medicine is small in dose, convenient to take, quick in action, exact in curative effect, safe, reliable, free of side effect and low in cost.

The invention relates to a method for measuring content of related substances in bosentan or preparation of bosentan. The method is a high performance liquid chromatography, wherein the chromatographic column: octadecyl silane serves as the filler; the moving phase: acetonitrile-0.025mol/L sodium heptanesulfonate solution (regulating the PH to be 3.0 through phosphoric acid); the volume ratio of the acetonitrile and the sodium heptanesulfonate solution is (60:40)-(70-30); and the detection wavelength is 212-222nm. By means of the high performance liquid chromatography, content of samples, intermediates and impurities can be accurately measured simultaneously. The samples are thoroughly separated in the analyzing process, the analyzing results are good in reproducibility, and the method simply and reliably ensures quality control and sample quality in the production process.

The present invention relates to a novel intermediate useful in the preparation of bosentan and to processes for the preparation of said intermediate and bosentan. The invention further relates to compositions comprising bosentan prepared according to the processes of the invention and their use in the treatment of endothelin-receptor mediated disorders.

The invention relates to bosentan tablet composition and belongs to the technical field of pharmacy. The bosentan tablet composition is composed of, by weight per 1000 tablets, 62.5 g of bosentan, 48-78 g of lactose anhydrous, 8-16 g of calcium bicarbonate, 10-20 g of mannitol, 0.1-0.8 g of lauryl sodium sulfate, 8-12 g of superfine silica powder, 20-32 g of microcrystalline cellulose, 1.5-4 g ofcrossarmellose sodium and 0.8-1.6 g of magnesium stearate. The bosentan tablet composition can meet the requirements on dissolution rate and meanwhile solve the problems of tablet loosening and related substance content increasing during storage.