39 results about "Azilsartan Medoxomil" patented technology

The invention relates to a pharmaceutical composition used for lowering blood pressure. The pharmaceutical composition with azilsartan medoxomil and another one or two blood pressure lowering substances as active ingredients mainly comprises calcium ion antisticking agent, angiotensin converting enzyme inhibitor (ACEI) and hydrochlorothiazide. The composition provided by the invention can be prepared into an oral preparation and is used for treating vascular hypertension.

The invention discloses a high performance liquid chromatography analysis method of azilsartan medoxomil. The method employs a reversed phase chromatography column and an ultraviolet detector, and an aqueous solution containing acetonitrile and acetic acid of low concentration is used as a mobile phase for gradient elution. The method can be used for simultaneously analyzing azilsartan medoxomil raw materials and all impurities in the preparation, and content of each known impurity can be effectively controlled by using a principle component self-contrasted method with correction factor added, and resolutions between each impurity peak, and resolutions between the main peak and adjacent impurity peaks are higher than 1.5, and purities of the main peak and each impurity peak are 1.0. The analysis method is simple with good repeatability and high specialization.

The invention provides azilsartan medoxomil tablets which comprise 10-35 parts of azilsartan medoxomil, 20-70 parts of a filling agent, 10-40 parts of an organic acid carrier material, 1-15 parts of a disintegrating agent and 5-15 parts of a lubricating agent, wherein the organic acid carrier material refers to citric acid or fumaric acid. According to the azilsartan medoxomil tablets prepared by the invention, the active ingredients which are highly dispersed in the carrier material contribute to rapidly dissolving the medicines and improving the dissolubility of insoluble drugs, and the acidic microenvironment generated by the organic acid carrier material contributes to maintaining the drug stability; and moreover, direct powder tabletting is adopted, so that a neutral water environment in the preparation process can be effectively avoided. The preparation drug is high in bioavailability, stable in quality and simple in preparation.

The invention relates to the field of medicines and in particular relates to a synthesis method for azilsartan medoxomil or salt thereof, an intermediate of the azilsartan medoxomil or the salt thereof and a synthesis method for the intermediate. According to the novel method for the azilsartan medoxomil or the salt thereof, the problems of low synthesized azilsartan medoxomil yield and large number of byproducts are solved. Furthermore, the invention further provides a synthesis intermediate of the azilsartan medoxomil or the salt thereof and two preparation methods. In a synthesis process, an alcohol fragment of the azilsartan medoxomil is introduced at first, so that a part of the azilsartan medoxomil is formed, and a cyclization structure fragment is synthesized; therefore, the problem that the yield is reduced because of side reaction caused by active hydrogen in a carbonyldimidazole structure of an azilsartan acid structure is solved in a reaction process; the reaction yield is greatly improved, so that a finished product is easier to purify; the synthesis method is particularly suitable for industrial production.

The invention discloses an olmesartan liposome solid preparation prepared by the following raw and supplementary material components in parts by weight: 1 part of olmesartan, 2.5-14 parts of dioleoyl-phosphatidylcholine, 0.5-6 parts of cholesterol, 0.8-10 parts of sodium glycyl-cholate, 0.2-5 parts of soy sterol and 2-20 parts of pharmaceutically acceptable carriers or excipients. The liposome solid preparation provided by the invention has high entrapment rate, even grain size, long medicament retention time in blood circulation, simple equipment, easiness in operation, improved product quality of the preparation and lessened toxic and side effects and is suitable for industrial production.

The invention relates to a novel preparation method of azilsartan medoxomil sylvite and its intermediate. The method comprises the following steps: hydrolyzing a starting material VII to obtain an intermediate IX, then performing esterification with a side chain IV to obtain the intermediate X; reducing the other starting material VIII by hydroxylamine hydrochloride to obtain the intermediate XI, then performing esterification with ethyl chloroformate to obtain the intermediate XII, and closing ring to obtain the intermediate XIII; performing condensation of the intermediate X and the intermediate XIII to obtain the intermediate II, and finally performing reaction with potassium isooctanoate to obtain the azilsartan medoxomil sylvite. The method has the advantages of easy acquisition of raw materials, short synthesis route, less equipment investment, less by-product, low toxicity, little pollution, environment protection, and high product purity, and is suitable for industrial production.

The present invention relates to an improved process for the preparation of azilsartan or its esters or salts thereof. Specifically, the invention provides a method for the preparation of highly pure methyl 1-[[2′-(4,5-dihydro-5-oxo-4H-1,2,4-oxa-diazol-3-yl)biphenyl-4-yl]methyl]-2-ethoxy-1H-benzimidazole-7-carboxylate an intermediate compound of formula (4) for azilsartan medoxomil with reduced content of desethyl impurity. The invention also involves the use of highly pure methyl 1-[[2′-(4,5-dihydro-5-oxo-4H-1,2,4-oxadiazol-3-yl)biphenyl-4-yl]methyl]-2-ethoxy-1H-benzimidazole-7-carboxylate in the preparation of azilsartan or its esters or salts thereof, preferably medoxomil with reduced content of desethyl impurity.

The invention relates to the field of medicines, in particular to a synthesis method for azilsartan medoxomil or salt thereof and an intermediate of the azilsartan medoxomil or the salt thereof. The invention provides a method for synthesizing the azilsartan medoxomil or the salt thereof and further provides a synthesis intermediate of the azilsartan medoxomil or the salt thereof and a preparation method for the synthesis intermediate. In a synthesis process, an alcohol fragment of the azilsartan medoxomil is introduced at first, so that a part of the azilsartan medoxomil is formed, and a cyclization structure fragment is synthesized; therefore, the problem that the yield is reduced because of side reaction caused by active hydrogen in a carbonyldimidazole structure of an azilsartan acid structure is solved in a reaction process; the reaction yield is greatly improved, so that a finished product is easier to purify; the synthesis method is particularly suitable for industrial production.

The invention discloses a synthetic method of a high-purity azilsartan medoxomil impurity. The method comprises the steps of with azilsartan as a raw material, reacting with 4-chloromethyl-5-methyl-1,3-dioxol-2-ketone in an alkaline organic solvent so as to prepare an azilsartan medoxomil impurity, refining the azilsartan medoxomil impurity through an organic solvent, so as to obtain the refined high-purity azilsartan medoxomil impurity. According to the synthetic method, the blank in the method for preparing the impurity at present is filled up, the synthetic method has the advantages of simplicity in operation and high yield and purity, can be applied to the research of the azilsartan medoxomil impurity and is capable of helping people to design a reaction route, improve reaction conditions, reduce or avoid the generation of the impurities and well improve the product quality in the synthetic process of azilsartan medoxomil.

The invention discloses a new preparation method of azilsartan kamedoxomil. The preparation method is characterized by comprising the steps: taking azilsartan medoxomil as a raw material, carrying out a reaction with an organic alkali to obtain azilsartan medoxomil organic amine salt with high solubility, and then carrying out a reaction of the azilsartan medoxomil organic amine salt with an organic kali salt to obtain the target product-azilsartan kamedoxomil. Compared with a conventional process, the method has the advantages of novel design, low impurity, high yield and the like. Moreover, the operation is safe and convenient, the problem of poor solubility of azilsartan medoxomil is solved, and the preparation method has industrialized prospect.

The invention relates to an impurity content decreasing method, in particular to a preparation method of azilsartan medoxomil with low content of azilsartan tetramer impurities (4). The method comprises the step that azilsartan (2) reacts with 4-hydroxymethyl-5-methyl-1,3-dioxol-2-one (3) in the presence of an alkali. The method is characterized in that the usage amount of the alkali is higher than 2.5 equivalents relative to that of the azilsartan (2).

The invention provides an azilsartan medoxomil potassium combination which has angiotensin II receptor antagonism. Azilsartan medoxomill is enabled to have high stability and dissolubility by adding pH control agent. The invention further provides a method for preparing the combination.

The invention relates to a crystal form of azilsartan medoxomil and a preparation method of the crystal form, in particular to multiple novel crystal forms of a compound 1-[[2'-(2,5-dihydro-5-oxo-1,2,4-oxadiazole-3-base)[1,1'-biphenyl]-4-base]methyl]-2-ethoxy-1H-benzimidazole-7-carboxylic acid(5-methyl-2-oxo-1,3-dioxole-4-yl)methyl ester and a preparation method of the novel crystal forms. Compared with the prior art, water solubility of the novel crystal forms is high, the melting point is low, therefore, compared with an existing crystal form, good dissolubility and bioavailability are achieved, and a pharmaceutic preparation can be obtained more conveniently through a hot-melt extrusion method.

The invention provides a preparation method of azilsartan medoxomil process impurities. The method comprises the following steps: A) azilsartan medoxomil A4 is dissolved in an organic solvent; or azilsartan medoxomil A4 is hydrolyzed to obtain azilsartan, and the azilsartan is dissolved in the organic solvent; B) a catalyst and alkali are added and stirred at the temperature of 0-5 DEG C; C) a DMFsolution of 4-halomethyl-5-methyl-1,3-dioxole-2-ketone is added in a reaction system, after charging is completed, a heating reaction is carried out, acid addition is carried out to adjust a pH value, and filtering is carried out to obtain a product. A synthesis route f the azilsartan medoxomil process impurities is designed, the azilsartan medoxomil process impurities can be successfully obtained with high yield, and a qualified impurities reference substance is obtained.

The invention discloses a preparation method of azilsartan medoxomil sylvite dispersible tablets. The method comprises the following steps of weighing, preparing an adhesive, preparing wet grains, drying, total blending and tabletting. The dispersible tablets uniform in dispersion, good in dissolution rate, smooth, uniform and good in cleanliness are obtained. The method is easy to implement, low in equipment requirement, convenient to prepare and applicable to industrial large-scale production.

The invention relates to a crystal form of azilsartan medoxomil and a preparation method thereof. In particular, the present invention relates to the compound 1-[[2'-(2,5-dihydro-5-oxo-1,2,4-oxadiazol-3-yl)[1,1'-biphenyl ]‑4‑yl]methyl]‑2‑ethoxy‑1H‑benzimidazole‑7‑carboxylic acid (5‑methyl‑2‑oxo‑1,3‑dioxol‑4‑yl)methanol Various new crystal forms of esters and their preparation methods. The new crystal form of the present invention has higher solubility in water than the prior art and has a lower melting point, so it has better dissolution rate and bioavailability than the existing crystal form and is more conducive to obtaining by hot-melt extrusion method Pharmaceutical preparations.

The present invention relates to a process for the preparation of Azilsartan Medoxomil Potassium. The invention further relates to novel highly crystalline polymorph of Azilsartan Medoxomil Potassium and composition comprising it. The invention provides thermostable highly crystalline polymorph of Azilsartan Medoxomil Potassium and process to produce a composition comprising the novel highly crystalline polymorph of Azilsartan Medoxomil Potassium.