50 results about "Acotiamide Hydrochloride" patented technology

The invention discloses a method for preparing a compound of formula (5). The method comprises the following steps: 1, reacting a compound of formula (2) with triphosgene, diphosgene or phosgene in a non-polar solvent in the presence of an organic alkali to obtain a product, reacting the obtained product with a compound of formula (3) to obtain a compound of formula (1); and 2, reacting the compound of formula (1) with a compound of formula (6) in 1,4-dioxane to obtain a substance, reacting the substance with HCl to form a salt which is the compound of formula (5), wherein R in the compound of formula (3) and the compound of formula (5) is a methyl group or an ethyl group.

The invention discloses a method for preparing an acotiamide hydrochloride trihydrate. The method comprises the following steps: 1, reacting a compound of a formula (1) and N,N-diisopropylethylamine (2) to obtain a compound (3); 2, performing two-site amino deprotection on the compound (3) to obtain a compound (4); 3, condensing the compound (4) and an acyl chloride derivative to obtain a compound (5); 4, further preparing the compound (5) to obtain the acotiamide hydrochloride trihydrate (6).

The invention relates to a synthetic method of acotiamide hydrochloride. The synthetic route of the acotiamide hydrochloride comprises the following steps: protecting hydroxyl vicinal to carboxyl in a formula (1) compound to obtain a formula (2) compound, performing acylating chlorination on the formula (2) compound to obtain a formula (3) compound, condensing the formula (3) compound with a formula (4) compound to obtain a formula (5) compound, condensing the formula (5) compound with a formula (6) compound to obtain a formula (7) compound, removing protection of 2-site hydroxyl of a benzene ring from the formula (7) compound, and salifying the compound to obtain the acotiamide hydrochloride. The synthetic method has the benefits that the formula (2) compound is not extracted but directly used for the next reaction to form the formula (5) compound in a one-pot method; the method is high in selectivity, low in side effect and high in yield; in the meantime, the formula (5) compound to the formula (8) compound can be prepared with the one-pot method; the method is high in the protection removal selectivity, low in side effect, less in the operation steps, and easy for realizing industrialization.

The invention discloses a method for determining solvents residual in an acotiamide hydrochloride bulk drug. The method adopts the following analysis conditions: the chromatographic column adopts a capillary chromatographic column with 6% cyanopropylphenyl 94% polydimethylsiloxane as the stationary phase; a reference substance solution is injected multiple times in a split flow manner, a sample solution is injected in the split flow manner, the carrier gas is nitrogen, the introduction is carried out by using a headspace injector, and detection is performed after temperature programming; and the detector adopts an FID detector. Methanol, isopropanol, dichloromethane and toluene in the acotiamide hydrochloride bulk drug are rapidly and efficiently separated under same chromatographic conditions through the method in order to effectively control the quality of acotiamide hydrochloride. The detection method has the advantages of strong specificity, high detection sensitivity, high precision, high accuracy, convenience in operation, and effective control of the product quality.

The invention provides an acotiamide hydrochloride medicinal preparation and a preparation method thereof. The acotiamide hydrochloride medicinal preparation comprises acotiamide hydrochloride and/or a hydrate thereof, at least one diluent, at least one disintegrating agent, at least one adhesive and at least one lubricant, the diluent includes a first diluent and is a hydrophilic instant component, and a weight ratio of the hydrophilic instant component to acotiamide hydrochloride and/or the hydrate thereof is 2:5-4:5. The acotiamide hydrochloride medicinal preparation is prepared by introducing a specific proportion of the hydrophilic instant component to a medicinal preparation and by mixing the hydrophilic instant component among the above acotiamide hydrochloride effective component. When the acotiamide hydrochloride medicinal preparation is dissolved and a material accumulation phenomenon appears, an external layer hydrophilic instant auxiliary material is treated as a pore forming agent, and an internal layer hydrophilic instant auxiliary material is treated as capillaries in a raw material with the dissolving of the external layer hydrophilic instant auxiliary material, and can guide a dissolution medium to rapidly enter the raw material in order to increase the dissolution and improve the dissolution speed.

The invention belongs to the technical field of medicine and relates to an Acotiamide hydrochloride hydrate crystal form and a preparation method thereof. The Acotiamide hydrochloride contains trihydrate and has the advantages of chemical purity of 99.9%, the largest impurity content less than 0.1%, optical purity of 99.95%ee and good stability. The invention also relates to a use of the Acotiamide hydrochloride hydrate composition in preparation of drugs for treating stomach reception disorder.

The invention discloses an acotiamide hydrochloride trihydrate refining method and an acotiamide hydrochloride trihydrate preparation method.The acotiamide hydrochloride trihydrate refining method includes adding crude acotiamide into an inorganic base aqueous solution with uniformly mixing, adding an organic solvent with stirring to crystallize, filtering and drying to obtain acotiamide hydrochloride sodium salt or acotiamide hydrochloride potassium salt, wherein inorganic base refers to sodium hydroxide, potassium hydroxide, sodium carbonate or potassium carbonate; adding the acotiamide hydrochloride sodium salt or acotiamide hydrochloride potassium salt into a hydrous isopropanol solution with uniformly mixing, adding hydrochloric acid to acidize a mixture to a pH value being 1-2, stirring to crystallize, heating to dissolve, decreasing the temperature to crystallize, and performing decompression drying so as to obtain acotiamide hydrochloride trihydrate.The acotiamide hydrochloride trihydrate refining method has the advantages that the acotiamide is prepared into the sodium salt or potassium salt, the sodium salt or potassium salt is refined, and accordingly impurities before and after a main peak can be removed effectively, and the final product, namely the acotiamide hydrochloride trihydrate, is above 99.8% in purity and below 0.10% in individual impurities.

The invention relates to a high-performance liquid chromatography analytical method for N1,N1-diisopropyl ethylenediamine. The analytical method is characterized by including the following steps that 1, N1,N1-diisopropyl ethylenediamine standard solutions of different concentrations are prepared, excess 2,4-dinitrofluorobenzene is added into the standard solutions for a derivatization reaction, after the reaction is completed, high-performance liquid chromatography analysis is carried out on reaction solutions, and the DNB-N1,N1-diisopropyl ethylenediamine peak area corresponds to a N1,N1-diisopropyl ethylenediamine concentration drawing standard curve; 2, a test sample is prepared into a solution, excess 2,4-dinitrofluorobenzene is added into the solution to react, after the reaction is completed, high-performance liquid chromatography analysis is carried out on the reaction solution, and the content of N1,N1-diisopropyl ethylenediamine in the test sample is calculated. The analytical method is accurate, high in repeatability and sensitivity, and capable of being used for detecting N1,N1-diisopropyl ethylenediamine in the producing and placing processes of acotiamide hydrochloride and tablets thereof and detecting N1,N1-diisopropyl ethylenediamine in other samples.

The invention discloses a preparation method of acotiamide hydrochloride. The preparation method is characterized by comprising the following steps: 1, making 2-hydroxy-4, 5-dimethoxybenzoic acid react with SOCl<2>, and obtaining a midbody, namely 2-hydroxy-4, 5-dimethoxy benzoyl chloride; 2, making the product obtained in step 1 react with 2-aminothiazole-4-formic acid alkyl ester, and obtaining 2-[(2-hydroxy-4,5-dimethoxy benzoyl chloride) amidogen]-1,3-thiazole-4-formic acid alkyl ester; 3, making the product obtained in step 2 react with N, N-diisopropyl ethanediamine, and obtaining acotiamide; 4, introducing hydrogen chloride directly for reaction without conducting separation, and obtaining the acotiamide hydrochloride after post-treatment is conducted on the product. The preparation method has the advantages of being high in purity and yield, low in cost, simple to operate and the like.

The invention discloses preparation methods for acotiamide and hydrochloride thereof; 2[(2-hydroxy-4,5-dimethoxybenzoyl)amino]-1,3-thiazole-4-carboxylic acid methyl ester and N,N-diisoprylamino ethylamine are subjected to a reaction in a molten state to obtain N-[2-(diisopropylamino)ethyl]-2-(2-hydroxy-4,5-dimethoxybenzoyl)amino]-1,3-thiazole-4-carboxamide, and hydrochloric acid is dropwise added to N-[2-(diisopropylamino)ethyl]-2-(2-hydroxy-4,5-dimethoxybenzoyl)amino]-1,3-thiazole-4-carboxamide in methanol to prepare acotiamide hydrochloride trihydrate. The preparation methods reduce the use of toluene, and are economical and convenient, complete in reaction, and safe in process; at the same time, toluene residues in the final products and the amount of an impurity 2[(2-hydroxy-4,5-dimethoxybenzoyl)amino]-4-carboxyl-1,3-thiazole are reduced, and the product quality is improved; and the crude products are easy to refine and purify, and the reaction yield is high.

The invention belongs to the technical field of medicine and relates to an Acotiamide hydrochloride hydrate crystal form and a preparation method thereof. The Acotiamide hydrochloride contains trihydrate and has the advantages of chemical purity of 99.9%, the largest impurity content less than 0.1%, optical purity of 99.95%ee and good stability. The invention also relates to a use of the Acotiamide hydrochloride hydrate composition in preparation of drugs for treating stomach reception disorder.

The invention discloses an acotiamide hydrochloride sustained-release drug. The acotiamide hydrochloride sustained-release drug only needs to be taken once every morning. The acotiamide hydrochloride sustained-release drug has the advantages of quick effect, good sustained-release effect, good curative effect and less adverse reactions. A collagen membrane is utilized for coating acotiamide hydrochloride and other pharmaceutically acceptable auxiliary materials, wherein a weight ratio of acotiamide hydrochloride to the collagen membrane is 1:(1-1.5).

The invention belongs to the field of medicine, and discloses an acotiamide hydrochloride sustained-release pellet and a preparation method thereof. The acotiamide hydrochloride sustained-release pellet consists of the following components in parts by weight: 2-50 parts of acotiamide hydrochloride, 20-95 parts of a thinner, 1-10 parts of a binding agent, 1-30 parts of a sustained-release material, 0-5 parts of a pore-forming agent, 0-5 parts of a plasticizer, 0-20 parts of an anti-sticking agent and 0-5 parts of a light-screening agent. By mixing the thinner, the binding agent, the sustained-release material and the acotiamide hydrochloride according to certain proportions, a drug release rate can be effectively regulated, and the acotiamide hydrochloride can be slowly released in vivo so as to generate a stable blood concentration and to avoid adverse reactions caused by relatively great fluctuation of the blood concentration in vivo in the case that the acotiamide hydrochloride dissolves rapidly in vivo. The preparation method of the acotiamide hydrochloride sustained-release pellet is simple to operate, low in production cost and high in efficiency, and the preparation method is applicable to the industrial production of the acotiamide hydrochloride sustained-release pellets.

The present invention relates to a crystalline form I of an acotiamide hydrochloride hydrate, a preparation method therefor and use thereof. The preparation method comprises: mixing acotiamide with an organic solvent so as to obtain a first mixture containing the acotiamide and the organic solvent; adding a salt-forming solvent into the first mixture to carry out a salt-forming reaction so as to obtain a second mixture containing an acotiamide hydrochloride; filtering the second mixture, and washing and drying a filter cake by an organic solvent so as to obtain a third mixture containing a crude product of the acotiamide hydrochloride; dissolving the third mixture in an aqueous organic solvent and performing slowly cooling crystallization after heating dissolution, so as to obtain a fourth mixture of an acotiamide hydrochloride hydrate crystal; and separating the crystal from the fourth mixture, and heating the separated crystal at 50-90 DEG C so as to obtain the acotiamide hydrochloride hydrate. The method is mild in reaction condition and simple in process and can be used for efficiently obtaining a highly pure acotiamide hydrochloride hydrate and a stable crystalline form thereof.

The invention provides an acotiamide hydrochloride intermediate, and a synthesis technique and application thereof, belonging to the technical field of drug synthesis. The synthesis technique comprises the following steps: (1) mixing 2,4,5-trimethoxy benzoic acid, ethyl 2-aminothiazolyl-4-formate, 1-hydroxybenzotriazole, an acid binder and an organic solvent; (2) adding diisopropyl carbodiimide into the mixture in the step (1); and (3) after the step (2) finishes, carrying out reaction while controlling the temperature of 25-50 DEG C, thereby obtaining the acotiamide hydrochloride intermediate. The synthesis technique avoids using sulfoxide chloride, improves the operating environment, has the advantages of short reaction time, fewer side reactions, simple purification treatment, high yield (the optimal yield can reach 68%) and high purity (98.8%), and is suitable for industrialized scale-up production.

The invention belongs to the field of crystal drug, and especially relates to an acotiamide hydrochloride dihydrate crystal, and a preparation method and applications thereof. The chemical properties of the acotiamide hydrochloride dihydrate crystal are stable; no obvious hygroscopicity is detected in influence factor tests and acceleration tests, and crystal form is not changed; and the content of related substance is low. The solubility of the acotiamide hydrochloride dihydrate crystal is slightly higher, and the dissolution rate of prepared tablets is slightly higher. The preparation method of the acotiamide hydrochloride dihydrate crystal is simple; no complex equipment is needed; preparation period is short; and product yield is 83% or higher.

The invention relates to the field of pharmaceutical preparations, and particularly discloses a preparation method for an acotiamide hydrochloride composition capsule. The preparation method includesthe steps of adding acotiamide hydrochloride, microcrystalline cellulose, starch, tyrosine, sodium alginate and glyceryl behenate into 5% of hydroxypropyl methylcellulose solution, conducting capsulation after wet granulation, and obtaining the acotiamide hydrochloride composition capsule. The preparation method is simple, and solves the technical problem that the acotiamide hydrochloride composition capsule obtained by the existing technology of wet granulation is easily-hygroscopic, not high in dissolution rate, poor in stability and the like; therefore, the prepared capsule is not easy to absorb moisture and agglomerate, and has high fluidity and a high dissolution rate, which is beneficial to the safe use and long-term storage of clinical drugs.

The invention discloses an oral disintegrating acotiamide hydrochloride tablet and a preparation method thereof. The oral disintegrating acotiamide hydrochloride tablet comprises, by weight, the following components: 40-90% of acotiamide hydrochloride bitter taste masking pellets, 4.5-49.9% of a filler, 4-10% of a disintegrating agent, 0.5-1.0% of a lubricant, 0-2.0% of a corrigent and 0-0.2% of essence, wherein the acotiamide hydrochloride bitter taste masking pellets are prepared from, by weight, 55-65% of acotiamide hydrochloride, 20-35% of blank pellet cores, 1-5% of a binder, 6-12% of bitter taste masking coating material and 0.7-1.2% of a pore-forming agent. The oral disintegrating acotiamide hydrochloride tablet can be rapidly disintegrated into fine particles in the oral cavity, does not need to be taken by water, is comfortable and cool in taste after being put into the mouth, does not have obvious gritty feeling, is pleasant in taste, is convenient for patients to swallow, isparticularly suitable for old people, children and people with dysphagia and can improve the medication compliance of patients and increase the populations using the tablet.

The invention relates to the field of pharmaceutical preparations, and particularly discloses an acotiamide hydrochloride composite capsule. The acotiamide hydrochloride composite capsule is prepared from acotiamide hydrochloride, microcrystal cellulose, starch, tyrosine, sodium alginate and glyceryl behenate. The acotiamide hydrochloride composite capsule preferably selects the acotiamide hydrochloride, microcrystal cellulose, starch, tyrosine, sodium alginate and glyceryl behenate as the composition of the acotiamide hydrochloride, and the synergistic effect can improve the stability, mobility and dissolution rate of the acotiamide hydrochloride, can reduce the moisture absorption performance and can facilitate the safe application and long-term storage of clinical drugs.