171 results about "Abiraterone acetate" patented technology

The invention provides a purification method of abiraterone acetate. The method comprises the following steps of: reacting trifloromethanesulfonic acid serving as a salt forming reagent with crude abiraterone acetate to obtain dry and easily-purified abiraterone acetate trifluoromethanesulfonic salt with the purity of over 97 percent; and performing a free reaction on the abiraterone acetate trifluoromethanesulfonic salt without a purification step so as to obtain abiraterone acetate, wherein the purity of the abiraterone acetate obtained by the free reaction is over 97 percent. The method simplifies purification process, saves reagent and is easy to operate and suitable for industrial production.

The invention relates to a solid dispersion and tablets comprising abiraterone acetate, and preparation methods thereof. The solid dispersion is prepared through the steps that: abiraterone acetate and povidone with a weight ratio of 1:0.5-4 are dissolved in chloroform; and reduced-pressure drying is carried out, such that the solid dispersion is obtained. The tablets comprises 1 part of the abiraterone acetate solid dispersion, 2-8 parts of a filling agent, 0.2-0.8 parts of a disintegrating agent, and 0.05-0.1 parts of a lubricant. According to the invention, a micronization technology and a solid dispersion technology are creatively combined, such that abiraterone acetate water solubility is greatly improved. Therefore, abiraterone acetate can be rapidly dissolved in gastrointestinal tract body fluids.

The invention relates to a preparation method of abiraterone acetate. The method comprises: taking dehydroepiandrosterone as the raw material, which successively reacts with hydrazine hydrate and idoine so as to obtain 17-iodo-adrost-5, 16-diene-3beta-ol, which then undergoes a Negishi coupling reaction with 3-pyridine zinc halide to obtain abiraterone, and finally conducting esterification with acetyl chloride or acetic anhydride, thus obtaining the target product abiraterone acetate.

Methods for treating certain cancers in patients, such as mammals, using certain 17α-hydroxylase/C_17,20-lyase inhibitors are discussed herein. More particularly, methods for treating cancers comprising administering a 17α-hydroxylase/C_17,20-lyase inhibitor, such as abiraterone acetate (i.e. 3β-acetoxy-17-(3-pyridyl) androsta-5,16-diene) and metabolites thereof are described. In addition, methods for treating cancers that are refractory to hormone therapy or that are refractory to chemotherapy are also discussed. Finally novel dosing regimens and novel uses of the compounds discussed herein are disclosed.

The invention provides a method for preparing (3beta)-17-(3-pyridyl)-androstane-5,16-diene-3-alcohol acetate. According to the method, the traditional Grignard addition reaction is adopted, pyridine groups are introduced in the presence of a catalyst such as cerous chloride, the method is low in raw material cost, available in raw materials, economical, practical, environment-friendly, convenient and simple in post-treatment, the reaction process is easily and continuously operated, the product quality and yield can be improved, and industrial production is promoted.

The invention discloses a convenient, rapid and economical method for massively preparing abiraterone acetate. According to the method, dehydroepiandrosterone acetate is used as a starting material, a keto carbonyl group is converted to hydrazone, and the abiraterone acetate is directly synthesized through iodination and Suzuki coupling reaction. According to the method, the operation is simple and convenient, the total yield of the three-step reaction is 34.7%, the product purity is 98.5%, the column chromatography separation purification is not required in the postprocessing, and the method is suitable for industrial production.

Methods and compositions for treating cancer are described herein. More particularly, the methods for treating cancer comprise administering a 17a-hydroxylase/C17, 20-lyase inhibitor, such as abiraterone acetate (i.e., 3beta-acetoxy-17-(3-pyridyl) androsta-5, 16-diene), in combination with at least one additional therapeutic agent such as an anti-cancer agent or a steroid. Furthermore, disclosed are compositions comprising a 17a- hydroxylase/C17, 20-lyase inhibitor, and at least one additional therapeutic agent, such as an anti-cancer agent or a steroid.

The invention relates to a new crystal form of a medicament, namely abiraterone acetate for treating prostatic cancer and a preparation method thereof, a pharmaceutical composition containing the new crystal form, and application of the new crystal form in preparing medicines for treating prostatic cancer.

The invention relates to an abiraterone acetate tablet medicine composition and a preparation method thereof, and belongs to the technical field of medicine preparations. According to an abiraterone acetate tablet, firstly, a hot melting extruding technology is adopted for preparing a solid dispersion body of abiraterone acetate and copovidone, then the solid dispersion body, a diluent, an adhesive, a disintegrating agent and a lubricating agent are prepared into a mixture, and finally the mixture is prepared into tables. The prepared abiraterone acetate tablets improve the dissolution rate and bioavailability of a peroral solid preparation and have larger clinic application value; in addition, the prepared abiraterone acetate tablets are stable in quality, controllable and convenient to conduct industrialized production.

The invention relates to an abiraterone acetate liquid capsule, comprising a capsule shell and contents, wherein the contents contain the components in percent by weight: 8-25% of abiraterone acetate and 74.8-91.8% of oil phase, wherein the oil phase comprises fatty acid monoglyceride and a solvent in a ratio of 1: 4 to 4: 1 by weight. The capsule disclosed by the invention does not contain a surfactant, as well as is good in dissolution rate, high in safety and simple in preparation process.

The invention relates to a preparation method of high-purity abiraterone acetate. The preparation method comprises that dehydroepiandrosterone acetate and trifluoromethanesulfonic anhydride undergo a sulfonylation reaction in the presence of an inorganic base. The preparation method obviously improves the yield of abiraterone acetate, greatly reduces by-products, has a low cost and no odor or strong smell, can be operated easily and is especially suitable for industrial production.

The present invention relates to a tablet, which uses water as a dissolution medium and has characteristics of rapid dissolution and good absorption. The preparation method comprises: dissolving abiraterone acetate and D-alpha-tocopheryl polyethylene glycol 1000 succinate in an organic solvent, carrying out pressure reducing drying to remove the organic solvent, mixing the obtained dried product, a filler and a disintegrant, adding a lubricant, mixing, and tableting to obtain the abiraterone acetate sublingual tablet. Compared to the abiraterone acetate sublingual tablet in the prior art, the abiraterone acetate sublingual tablet of the present invention has the following advantages that the abiraterone acetate sublingual tablet can be subjected to complete dissolution within 15 min so as to ensure the efficacy of the medicine, the complex micro-powder treatment does not required, and the bioavailability of the medicine is substantially improved.

The invention relates to the technical field of pharmaceutical preparations and particularly relates to an abiraterone oral spray. The abiraterone oral spray comprises the following components in percent by weight: abiraterone acetate, an oil phase, a surfactant, a co-surfactant and the balance of water, wherein the oil phase is used as a carrier for prompting system micro-emulsification, and the oil phase is medium chain triglyceride, ethyl oleate or oleic acid; the surfactant is used for improving the performance of the abiraterone oral spray, expanding the range of application and realizing solubilization, and the surfactant is polyoxyethylene 40 hydrogenated castor oil or polyoxyethylene 35 castor oil; and the co-surfactant is used for reducing the surface tension of liquid and enhancing the emulsifying, moistening and blistering effects, and the co-surfactant is ethanol, n-butyl alcohol or propylene glycol. The spray has the advantages that the taking dose is reduced, so that the manufacturing cost is lowered; the formation of invalid metabolites is reduced, so that adverse reactions are effectively reduced; and the drug effect of the spray is longer than that of an oral drug.

The present disclosure relates to pharmaceutically acceptable complex formulae comprising complexes of Abiraterone acetate and pharmaceutically acceptable excipients, process for the preparation thereof and pharmaceutical compositions containing them. The complex formulae of the present disclosure have improved physicochemical properties which results in reduced food effect which allows significant dose reduction and the abandoning of the requirement of taking the drug on an empty stomach.

The invention relates to a method for preparing abiraterone which is a key intermediate of abiraterone acetate serving as a medicament for treating prostatic cancer and a method for preparing the abiraterone acetate by using the intermediate thereof. The methods are simple in processes, and the products have high purity and low content of impurities.

The present invention relates to processes for obtaining abiraterone and derivatives thereof, such as abiraterone acetate, by means of a Suzuki coupling through a steroid borate of general formula (IV) or a C—C coupling through a steroid hydrazone of general formula (II), as well as to intermediates useful in said processes.

The invention provides a preparation method of abiraterone acetate. According to the method, firstly an intermediate product, namely coarse abiraterone is purified and refined, then a purified product of abiraterone is acetylated, the abiraterone acetate is directly prepared, accordingly the coarse abiraterone product which is in an off-white color, relatively high in purity and less in impurity is obtained directly, the coarse abiraterone product is further simply crystallized, the abiraterone acetate which is high in purity and meets the medicinal requirement can be obtained, and therefore the step of chromatography or tedious purification of an inorganic salt-precipitated crystal in a traditional method can be avoided. The method has the advantages of being more convenient and faster in operation and purification treatment step, more suitable for industrialized amplification production and the like.

The invention discloses an abiraterone oral emulsion and a preparation method thereof. The preparation comprises an active component, a solubilizer, an emulsifier and an antioxidant; the active component is abiraterone acetate or abiraterone; and the preparation comprises, by weight, 2%-10% of abiraterone acetate or abiraterone, 20%-70% of the solubilizer, 20%-40% of the emulsifier and 0.01%-1% ofthe solubilizer. According to the invention, the drug loading capacity and the stability of the abiraterone oral emulsion are high; and the abiraterone oral emulsion can be spontaneously emulsified to form an emulsion when meeting water. And the formed emulsion is stable; the digestion influence is low; the dissolution of medicines in gastrointestinal tracts is improved; the absorption of the medicines is promoted; and the bioavailability is improved.

The invention discloses a preparation method of abiraterone acetate (I). The preparation method comprises the following steps of: based on dehydroepiandrosterone acetate as a raw material, performing addition reaction with 3-pyridyllithium to generate 17-(3-pyridyl)-17-hydroxy-androst-5-ene-3 beta-ol acetate (II); performing elimination reaction on the intermediate (II) under the action of a Burgess reagent to get abiraterone acetate (I). The preparation method has the advantages of simple process, easiness in obtainment of raw materials and controllable quality, and is suitable for industrial production.

The invention discloses a preparation and detection method of an abiraterone acetate dimer compound, and relates to the of field pharmacy. The dimer compound is 3 beta-acetyl-16-(3 beta-acetyl androstane-5,16-diene-17-base)-17-(3-pyridyl) androsterone-5,16-diene. The method is as follows: adding compounds I and II into a reactor; dissolving the compounds and adding a palladium catalyst and alkali into the reactor; cooling to room temperature; filtering; concentrating; adding water; extracting; concentrating to obtain a compound III crude product; placing the crude product in the reactor; adding pyridine and an acetyl compound; stirring at room temperature till complete reaction; concentrating to remove pyridine and the acetyl compound; adding water, extracting and concentrating to obtain a dimer compound crude; and dissolving the dimer compound crude, washing, drying, filtering, concentrating and recrystallizing to obtain the abiraterone acetate dimer compound. According to high performance liquid chromatography detection and calculation by an area normalization method, the prepared dimer compound has a purity up to 98% and a yield higher than 80%.