67 results about "Cinepazide" patented technology

The invention relates to a method to synthesize maleic acid cinepazide. (2) reacts with 3,4,5- cinnamyl chloride, aquiring free alkali of cinepazide, the solvent is chosen from 5, add 6 and acquire the (7), the method for separating (1) is filtration. The invention uses safe solvent in the synthesis of (2), and the method of filtration and 8, making it suitable for industrialized production. The method uses the solvent with low toxicity and good safety, simplized productive condition and course, has high productivity and low cost.

The invention provides a method for preparing cinepazide maleate, comprising the following steps of: allowing chloride acid pyrrole , piperazine and Hydrochloric acid to react in a water solvent, adding alkaline substances to adjust PH value, and then collecting 1-piperazine acetyl pyrrole, allowing product to react with 3, 4 and 5 - trimethoxy chloride cinnamon in Acetic ester solvent, collecting Cinepazide free base in the reaction product and then salifying the free base with maleic acid to obtain cinepazide maleate. The cinepazide maleate obtained is heated to reflow in mixed solvent of alcohols and acetone, and then collecting cinepazide maleate with stable crystal form from the system. The melting point of the cinepazide maleate obtained is at a temperature of between 173 and 174 DEG C. The cinepazide maleate prepared in the method has a low cost, the method is simple to operate, is high in the yield, the product quality is stable and is suitable for industrialized production.

The invention belonging to the field of medicine technology discloses a cinepazide maleate injection and a manufacturing method thereof. In every 1000ml of injection, 35-45g of cinepazide maleate is contained, 20-30g of D-sorbierite, 2-3.5g of disodium hydrogen phosphate, and proper water for injection are contained. The manufacturing method includes the following steps: dissolving the D-sorbierite in water; adding the cinepazide maleate into the D-sorbierite solution, mingling in order to partially dissolve; adding part of disodium hydrogen phosphate solution in order to fully dissolve the cinepazide maleate; then slowly adding the rest disodium hydrogen phosphate solution to adjust the pH value; finally filtering and preparing into injection preparation. The cinepazide maleate injection of the invention effectively reduces the content of cinepazide maleate cis-isomer for the long-term storage.

The invention provides a method for preparing cinepazide maleate. The method comprises the following steps: preparing mixed acid anhydride or acyl halide by taking 3,4,5-trimethoxycinnamic acid as a raw material; then, reacting the mixed acid anhydride or the acyl halide with absolute piperazidine to prepare 1-(3,4,5-trimethoxyphenyl)piperazidine, or dehydrating the 3,4,5-trimethoxycinnamic acid and the absolute piperazidine to generate 1-(3,4,5-trimethoxyphenyl)piperazidine under the action of dicyclohexylcarbodiimide; reacting chloracetyl chloride with nafoxidine to prepare N-(2-chloracetyl)nafoxidine; reacting the N-(2-chloracetyl)nafoxidine with 1-(3,4,5-trimethoxyphenyl)piperazidine to prepare cinepazide free alkali; and salifying the cinepazide free alkali and maleic acid to prepare the cinepazide maleate. The method has the advantages of accessible raw materials, mild reaction condition, simple and easy operation, short synthesis route, high yield, industrial production availability and the like.

The invention discloses a synthesis method for improved cinepazide maleate. The synthesis method comprises the following steps: step one: preparing chloracetyl tetrohydropyrrole; step two: preparing 1-[(1-tetrahydropyrrylcarbonyl) methyl]-4-tertbutoxylcarboxypiperazidine; step three: preparing 1-[(1-tetrahydropyrrylcarbonyl) methyl]-piperazidine hydrochloride; step four: preparing 3, 4, 5-trimethoxylcinnamoyl chloride; step five: preparing 1-[(1-tetrahydropyrrylcarbonyl) methyl]-4-(3, 4, 5-trimethoxylcinnamoyl)-piperazidine; step six: preparing 1-[(1-tetrahydropyrrylcarbonyl) methyl]-4-(3, 4, 5-trimethoxylcinnamoyl)-piperazidine maleate. The synthesis route of the environment-friendly cinepazide maleate is economic and practical, green, simplifies operation, saves energy, and generates little waste.

The invention relates to a methanesulfonic acid cinepazide crystal form III and a preparation method thereof, and belongs to the field of chemical pharmaceutics. The water solubility of the prepared methanesulfonic acid cinepazide crystal form III is higher than that of an amorphous material, and the methanesulfonic acid cinepazide crystal form III is particularly suitable for injection, has higher chemical stability than the amorphous material, facilitates production of medicines, and storage and transportation of raw material medicines, improves the safety of the medicines and provides safe guarantee for clinical application of the medicines.

The invention relates to a preparation method of cinepazide maleate, comprising the following steps: taking (E)-3, 4, 5-trimethoxy cinnamate as a raw material, preparing and obtaining (E)-3, 4, 5-trimethoxy cinnamoyl piperazine by activating carboxyl with an activated agent and then reacting with piperazine anhydrous as a compound, and reacting the (E)-3, 4, 5-trimethoxy cinnamoyl piperazine with chloracetyl pyrrolidine to prepare cinepazide free alkali which becomes salt after adding maleic acid. The preparation of the chloracetyl pyrrolidine adopts a solventless method. Since the solventless method is adopted for preparing the chloracetyl pyrrolidine, the preparation method prevents from using an organic solvent with larger toxicity and low boiling point, has high safety, is environment-friendly, and simplifies the production condition and process. The cinepazide maleate crystal with the melting point of 170 DEG C to 175 DEG C is obtained by adopting an alcohol-butanone mixed solvent, has high melting point and stable crystal form and is suitable for industrial production on large scale.

An improved preparation method of cinepazide maleate belongs to the pharmaceutical technical field. The improved preparation method is characterized in that anhydrous piperazine reacts with chloracetylpyrrolidine in absolute ethyl alcohol at room temperature to obtain 1-[(1-tetrahydropyrrolylcarbonyl)methyl]piperazine, post-treatment method is a acetone dissolution and filtration method; then the 1-[(1-tetrahydropyrrolylcarbonyl)methyl]piperazine reacts with 3,4,5-trimethoxycinnamoyl chloride at the room temperature to obtain cinepazide free alkali, an acid-binding agent used is triethylamine, and a solvent is selected from acetone or tetrahydrofuran, methyl ethyl ketone, methylbenzene, xylene, methyl isobutyl ketone, cyclohexanone and the like, and the acetone is preferred; finally, the cinepazide maleate is obtained after salifying with maleic acid. The improved preparation method has the effects and benefits of using a cheap and low-toxic solvent with good safety in the process of preparing the cinepazide maleate (I), mild reaction conditions, simple operation, fewer by-products, low energy consumption and equipment requirements, higher product yield and good product quality, and being suitable for industrial production.

A powder injection of cinepazide maleate is proportionally prepared from cinepazide maleate, solubilizer and filler through mixing for dissolving, decoloring by medical activated carbon, filtering with millipore membrane, dewatering and drying.

The invention relates to a drug composition for treating encephaledema and a preparation method of the drug composition. The compound drug composition comprises the following active ingredients: sennoside A, cantharidin or a derivative of cantharidin, nimodipine or nifedipine, cinepazide maleate and edaravone. An active drug and a drug combination capable of reducing colloid osmotic pressure and crystal osmotic pressure in brain cells so as to treat the encephaledema are looked for through a cell experiment, and a novel pharmaceutical application is provided clinically.

The invention discloses a preparation method of cinepazide maleate, comprising the steps of (1) preparing 1-piperazine acetyl pyrrolidine (IV) and (2) taking 1-piperazine acetyl pyrrolidine as material to prepare cinepazide maleate. The preparation method of 1-piperazine acetyl pyrrolidine comprises the following steps: placing piperazine dihydrochloride in water to react with alkaline and obtaining a reaction system containing piperazine monohydrochloride; (2) adding chloracetyl pyrrolidine into the reaction system for reaction, adjusting pH to 10-13 by using alkaline material, collecting 1-piperazine acetyl pyrrolidine from reaction products. The method for preparing the cinepazide maleate has low cost, high material utilization ratio, simple and convenient operation and higher yield and is suitable for industrial production.

The invention relates to a method for synthesizing cinepazide. The method comprises: obtaining 3,4,5-trimethoxy cinnamoyl piperazine through the reaction of 3,4,5-trimethoxy cinnamic acid and piperazine; obtaining cinepazide through the reaction of 3,4,5-trimethoxy cinnamoyl piperazine and chloroacetyl pyrrolidine; and forming salts from cinepazide and maleic acid optionally. The method provided by the invention has the advantages of short route, simple operation, not high requirements for production equipment, environment-friendly reagents used, high reaction yield, high purity of obtained products and suitability for industrial scale production.

A synthetic method of cinepazide maleate belongs to the pharmaceutical technical field. The synthetic method is characterized in that trans-3,4,5-trimethoxycinnamic acid is taken as a raw material, and a carboxy activator is employed to synthesize by a 'one pot' method to obtain cinepazide free alkali in the presence of organic base. The used activator is any one of alkyl chloroformate, methylsulfonyl chloride, benzene sulfonyl chloride, p-methylsufonyl chloride, diphenylphosphinyl chloride, 2,4,6-trimethylbenzenesulfonyl chloride, N,N-dicyclohexylcarbodiimide(DCC) and carbonyldiimidazole (CDI); ethyl chlorocarbonate is preferred, the reaction temperature is minus 10 DEG C and a solvent is dichloromethane. The cinepazide maleate is obtained after salifying the free alkali. The synthetic method has the effects and benefits of simplifying production conditions and procedure, avoiding application of a reactive intermediate trans-3,4,5-trimethoxycinnamoyl chloride, reducing environmental hazards and reducing equipment requirements; and providing a new synthetic route which is simple and easily controlled, has mild reaction conditions, is environment-friendly and applicable to large-scale industrial production.

The invention relates to a preparation method of cinepazide maleate, comprising the steps of: reacting 3,4,5-trimethoxycinnamic acid with a chlorination agent, diethyl phosphorochloridate and benzene sulfonyl chloride to prepare a corresponding acyl active matter of the 3,4,5-trimethoxycinnamic acid; reacting the acyl active matter of the 3,4,5-trimethoxycinnamic acid with 1-[(1-pyrrolidine carbonyl) methyl] piperazine dihydrochloride to prepare 1-[(1-pyrrolidine carbonyl) methyl]-4-(3,4,5-trimethoxyphenyl) piperazine; and separating the 1-[(1-pyrrolidine carbonyl) methyl]-4-(3,4,5-trimethoxyphenyl) piperazine to salify with maleic acid so as to prepare cinepazide maleate, or directly salifying with the maleic acid in an ethanol or acetone solution and then crystallizing to prepare the cinepazide maleate with high melting point and stable crystal form, wherein the 1-[(1-pyrrolidine carbonyl) methyl] piperazine dihydrochloride can be prepared through reacting chloracetyl pyrrolidine with the dihydrochloride mixture of the piperazine and piperazine in proportion of 1:1 in lower alcohol, and introducing hydrogen chloride. The process has the advantages of simple operation and high yield.

The invention belongs to the technical field of chloroacetic acid detection, and particularly relates to a detection method for determining chloroacetic acid residues in a cinepazide maleate intermediate through an HPLC method. The method comprises the following steps: (1) preparing a reference solution; (2) preparing a sample solution; (3) performing sample injection detection in HPLC, wherein chromatographic detection conditions are as follows: chromatographic column: a silane bonding silica gel column is a high performance liquid chromatography column of a stationary phase, a mobile phase A: water-methanol-trifluoroacetic acid in a volume ratio of 96: 4: 0.1, a mobile phase B: methanol, the flow velocity of the mobile phase being 0.6-1ml/min, the column temperature of the chromatographic column is 33-37 DEG C, the sample size is 20mu l, and the detection wavelength is 212-216nm; and (4) calculating the content of chloroacetic acid: calculating the content of chloroacetic acid according to the peak area through an external standard method. The method has the beneficial effects that the chloroacetic acid is detected by using the HPLC method, the operation is simple, and the problems in the prior art are solved.

The invention discloses a method for synthesizing cinepazide. The method for synthesizing the cinepazide comprises the step of reacting an activated substance of 3,4,5-trimethoxy cinnamic acid with 1-[1-(1-pyrrolidine carbonyl)methyl]piperazine or salt thereof to obtain the cinepazide. Benzene high-toxicity solvents are not used in the whole reaction process, so the method is environment-friendly and safe in industrial production; the reaction steps are few, so the method is easy to operate; the method is mild in condition, simple in aftertreatment and suitable for industrialized production; special or complex reaction equipment is not required; and the product has high purity. The invention provides a synthetic route of the cinepazide, with high reaction yield and low cost.

The invention provides a cinepazide maleate compound with a novel route. Concretely, the method comprises the step of making 3, 4, 5-trimethoxy cinnamic acid and piperazidine take reaction in the existence of dichloromethyl (trichloromethyl) carbonic ether for producing 3, 4, 5-trimethoxy cinnamoyl piperazine. Through using the dichloromethyl (trichloromethyl) carbonic ether as acid activated groups, the invention simplifies the reaction steps, and reduces the environment pollution, in addition, the superfluous piperazidine is separated through the reaction with the piperazidine at first, and the processing steps are simplified, so the subsequent purification becomes easy.

The invention relates to maleate cinepazide crystal forms and preparation methods, belonging to the medicine technical field, which comprises maleate cinepazide crystal form A, crystal form B, polymorphism containing crystal form B, and the preparation methods of the crystal forms.

The invention discloses a cinepazide organic acid medicinal salt and provides a preparation method and medicinal preparation of the cinepazide organic acid medicinal salt, werein,organic acid comprises gluconic acid, hydroxyl methanesulfonic acid, isethionic acid, ethyl sulfonic acid, benzene sulfonic acid, malic acid and oxalic acid,preferably gluconic acid. The cinepazide organic acid medicinalsalt is mainly used for treating and preventing cerebrovascular disease, cardiovascular disease and peripherial ascular disease. The cinepazide organic acid medicinal salt provided by the invention has the characteristics of good stability and good dissolvability, and is especially used for solving the defect of optical unstability of the maleic acid cinepazide.