153 results about "Clindamycin Phosphate" patented technology

The invention relates to a method for preparing clindamycin phosphate powder filling agent, including: adding and dissolve clindamycin phosphate in alcohol solution; adding in activated charcoal to make decolorization, then roughly filtering, finely filtering, and placing to crystallize, filtering to eliminate supernatant and obtaining clindamycin phosphate crystal; then making transfer-solution for the second time, recrystallizing once, filtering and obtaining the recrystallized clindamycin phosphate crystal; drying and crushing, making split charging, capping and packaging in aseptic condition and making it. In the preparing course, it needs no high temperature treatment, need not add in additive, and its powder has good fluidity, high purity, few impurities, high bio-capability and good stability. It has no anaphylaxis and hemolysis and has no stimulation to blood vessels by intravenous injection. It adds a new clinic form of clindamycin phosphate, meeting clinic requirement.

The invention provides a preparation method of clindamycin phosphate; the method of the invention includes the following processes: muriatic acid clindamycin and a solid light (C[3]Cl[6]O[3]) carry out chlorination reaction in a chloroform solvent under the temperature of 50 to 80 DEG C; then are alcoholized and ketonized; finally under the co-catalysis of naphthyridine and triethylamine, the muriatic acid clindamycin and phosphorus oxychloride are esterified, hydrolyzed, absorbed and crystallized in an acetone solvent to obtain the clindamycin phosphate. The solid light is adopted to take part in the chlorination reaction in the reaction system of the invention, thus lightening the pressure of environment protection; simultaneously the content of epiclindamycin in the finished product is reduced; moreover, partial naphthyridine is replaced by the triethylamine, thus reducing the cost and improving the yield to a large extent.

The invention provides a clindamycin phosphate freeze-dried powder injection, which is prepared by the steps that: clindamycin phosphate solution is added with NaOH and is freeze-dried, wherein, the weight ratio of clindamycin phosphate to the NaOH is between 12 and 18 to 1, and the preferred weight ratio is 16.5 to 1. The clindamycin phosphate freeze-dried powder injection has simple formula and less auxiliary materials, overcomes side effects due to the fact that the auxiliary materials are excessively added, and ensures that patients are safer for use.

Described herein are emulsions and compositions for the treatment of acne vulgaris. The emulsions may be formulated as aerosol compositions. The aerosol propellant may be a hydrofluoroalkane propellant. The emulsions or compositions may comprise clindamycin phosphate and a buffer salt, and may exhibit decreased rates of clindamycin phosphate hydrolysis. Also described are methods of treating acne vulgaris, comprising the step of applying to an affected area of a subject in need thereof a therapeutically-effective amount of an inventive emulsion or aerosol composition.

An antibacterial clidamycin phosphate powder injection for treating infective diseases caused by gram-positive bacteria or anaerobic bacteria contains clindamycin phosphate (77-97.3%), the surfactant(Poloxamet 188 or Tween 80) for speeding up dissolving of clindamycin phosphate, and optional sodium hydroxide (25-8%) for regulating pH value. Its advantages are high safety and stability, high dissolving speed and high clearness of its solution.

The invention relates to a clindamycin phosphate lipidosome freeze-dried preparation and a preparation method thereof. The clindamycin phosphate lipidosome freeze-dried preparation is characterized by comprising the following components in portion by weight: 15 to 25 portions of clindamycin phosphate, 10 to 40 portions of dimyristyl acid lecithin, 1 to 10 portions of cholesterol, 1 to 5 portions of antioxidant, and 5 to 25 portions of cryoprotectant.

The invention discloses a method for synthesizing clindamycin phosphate, which comprises the following steps of: performing ketal protection reaction on clindamycin hydrochloride alcoholate at the temperature of between 2.0 below zero and 2.0 DEG C under the action of acetone and phosphorus oxychloride to form propylidene clindamycin; and performing esterification, hydrolysis, adsorption, washing, deabsorption, concentration, coarse crystallization, decoloration, refining and drying to obtain the finished product of clindamycin phosphate. Because a new catalyst 4-dimethylaminopyridine participates in the esterification in the rection system, the phosphorylating reaction is performed completely, and the conversion rate of raw materials is improved. Meanwhile, due to the secondary crystallization method, the problems of poor color grade and poor powder solubility are solved, and the operating conditions are mild and simple. By adopting triethylamine to replace partial pyridine, the esterification is pushed forwards; the reaction period is shortened; and importantly, related impurities in the finished product and the production cost are reduced, and the content is improved.

The invention provides a method for simultaneously analyzing and detecting methylparaben (Me-PHBA), propylparaben (Pr-PHBA) and dibutyl hydroxy toluene (BHT) in clindamycin phosphate gel. According to the method, Agilent ZORBAX SB-C18 (4.6mm*250mm, 5 mu-m) is adopted as a chromatographic column, an acetonitrile-1% acetic acid aqueous solution is used as a moving phase for gradient elution, double wavelengths (the detecting wavelength for detecting Pr-PHBA and Me-PHBA is 250-260nm, and the wavelength for detecting BHT is 270-286nm) are adopted for analyzing and detecting. The analyzing method is quick, has the advantages of good specificity and high sensitivity, is suitable for detecting contents of Me-PHBA, Pr-PHBA and BHT in a medicine preparation, in particular a gel.

The invention discloses a crystallization method of clindamycin phosphate, comprising the following steps: firstly dissolving the clindamycin phosphate in n-butanol aqueous solution; then performing crystallization after decoloration, concentration and stepped temperature reduction to below 25 DEG C, filtering, washing, and drying to obtain the finished product. The crystallization method of the clindamycin phosphate of the invention has high crystallization yield, saves the time and reduces the cost; and the clindamycin phosphate finished product has high purity, good mobility and less possibility of agglomeration.

The invention discloses a preparation method of clindamycin phosphate powder for injection, comprising the following steps of: taking clindamycin phosphate, adding alkaline solution at room temperature, stirring for dissolving the clindamycin phosphate to prepare sterile solution having a high concentration; in the sterile environment, adding inorganic acid or organic acid to adjust the pH value of the solution, adding inert organic solvent to crystallize, depressurizing, filtering and drying to obtain sterile powder of clindamycin phosphate; under the sterile condition, packing the powder in a sterile vial, covering the vial with a butyl latex plug, rolling a aluminum cover so as to make sterile powder. Compared with a prior art, the invention has the advantages of low cost, simple production device, short production cycle and the like; and dissolution of samples at a high temperature is unnecessary in the production process, which prevents the clindamycin phosphate from being dissolved or damaged in the production process, so that the final product has the advantages of high purity (low impurity), little toxicity and side effects and stable quality. The invention is particularly suitable for large-scale production.

The invention belongs to the technical field of medicine, in particular relating to a clindamycin phosphate solvate crystal and a preparation method thereof. The clindamycin phosphate solvate crystal comprises a clindamycin phosphate isobutanol-water solvate crystal and a clindamycin phosphate dimethyl sulfoxide-water solvate crystal which have good chemical stability and stable property in the storage process.

The invention relates to a process for synthesizing clindamycin phosphate. The process comprises the following steps: 1) ketal reaction, wherein clindamycin hydrochloride alcoholate is used as a basic raw material to prepare a 3.4-clindamycin condensation compound through selective hydroxyl protection; and 2) phosphatidic reaction, wherein the 3.4-clindamycin condensation compound is used as a raw material, phosphorus oxychloride is used as a phosphatidic agent, and anhydrous potassium carbonate is used as an acid binding agent to complete the phosphatidic reaction under double actions of esterification catalyst dimethylamino pyridine and phase-transfer catalyst benzyl triethyl ammonium chloride, and a target compound, namely the clindamycin phosphate, can be obtained through hydrolysis deprotection. The process has the advantages that: 1, the process has simple method and practical application; 2, the content of pyridine/triethylamine in wastewater of phosphatidic reacting process can be controlled, so that the pressure of high COD wastewater drainage can be greatly reduced; and 3, the weight yield reaches over 95 percent, and the product quality fulfills the requirement of WS1-(X-322)-2003Z.

The invention provides a clindamycin phosphate injection composition and a preparation method thereof. The clindamycin phosphate injection composition comprises the following components in parts by weight: 178-179 parts of clindamycin phosphate, 12-13 parts of sodium hydroxide and 1000 parts of water for injection. The preparation method of the clindamycin phosphate injection composition comprises the following steps: adding water for injection; adding sodium hydroxide into the water for injection; adding clindamycin phosphate into the solution added with sodium hydroxide, so as to obtain a mixed solution, wherein pH of the mixed solution is 6.0-7.0; adding activated carbon into the mixed solution, realizing constant volume by adopting the water for injection, stirring, filtering, and decarbonizing; sterilizing and filtering the decarbonized mixed solution, and carrying out split charging and freeze drying, thus the clindamycin phosphate injection composition is obtained. The clindamycin phosphate injection composition has good stability, contains less impurities and is simple to prepare and applicable to industrial production.

The invention relates to a method for preparing clindamycin phosphate for injection. The invention also provides the clindamycin phosphate for injection which has safe quality and good stability. The invention mainly provides a freeze-dried powder pre-freezing solution and a preparation method thereof, and overcomes the disadvantage of unsteady preheating of the clindamycin phosphate.

The invention relates a new active clindamycin phosphate compound and a medicinal composition of the compound. When the clindamycin phosphate compound is determined by using powder X-ray diffraction, characteristic diffraction peaks appear at the angels of 4.85 degrees, 5.73 degrees, 6.64 degrees, 9.12 degrees, 11.98 degrees, 13.51 degrees, 17.37 degrees, 19.61 degrees, 21.76 degrees, 22.23 degrees, 23.46 degrees, 26.82 degrees, 28.16 degrees, 33.68 degrees and 34.29 degrees in a X-ray diffraction pattern represented in 2theta +/-0.2 degree diffraction angles. The stability of the clindamycinphosphate compound provided by the invention is improved remarkably; the influences on the appearance, content and other aspects of the clindamycin phosphate compound caused by long-term storage can be ignored, thereby ensuring the drug safety for patients. In addition, the new clindamycin phosphate compound is suitable to be popularized and applied to various clindamycin phosphate preparations.

The invention provides a novel route for clindamycin phosphate compounds. In particular, clindamycin serving as an initial reaction raw material undergoes hydroxyl protection, phosphorylation and hydrolysis reaction to obtain the clindamycin phosphate compounds. In the new route, a specific catalyst is used and phosphorus oxychloride is used as a phosphorylating agent, so that compared with the prior art, the new route has the advantages of greatly lowering consumption of phosphorus oxychloride, lowering production cost and being more suitable for industrialization.

The invention provides a clindamycin phosphate injection preparation and a prescription thereof. According to the prescription, the clindamycin phosphate injection preparation comprises clindamycin phosphate, a cosolvent, a metal ion complexing agent, a solvent of raw materials and auxiliary materials and the like. The invention aims to provide a method for preparing the clindamycin phosphate injection preparation with more advanced technology and better product quality.

The invention relates to a clindamycin phosphate composition for injection. The composition is freeze-dried powder which consists of clindamycin phosphate and sodium hydroxide, wherein the weight ratio of the clindamycin phosphate to the sodium hydroxide is (24-26):1; the average grain diameter of the freeze-dried powder is 70-130nm; and the porosity is 92-98 percent. A preparation method of the composition comprises the following steps of: (1) preparing: weighing the clindamycin phosphate and the sodium hydroxide, filling in a preparation tank, adding water for injection, stirring to fully dissolve the clindamycin phosphate and the sodium hydroxide and uniformly mixing; (2) decarbonizing and performing sterile filtration; (3) performing sterile subpackaging; and (4) freeze-drying under vacuum. The composition has the advantages of simple formula, advanced process, uniform quality and superior stability and meanwhile has better redissolving performance and clinical medication safety.

The invention relates to a refining method of clindamycin phosphate and is suitable for the pharmaceutical industry. The refining method comprises the following steps: dispersing clindamycin phosphatein a low alcohol of 4-10 times; adding organic alkali till the clindamycin phosphate is fully dissolved while stirring; decoloring, degerming and filtering the mixture; adding a degermed and filteredhydrogen chloride ethanol solution till the pH is 3.5-4.5; crystallizing the mixture for 1h; and filtering, washing and drying the mixture in vacuum. The clindamycin phosphate is prepared in an anhydrous system, so that the probability of hydrolytic degradation is avoided. The refining method is operated at normal temperature, is low in energy consumption, short in production period and high in yield by adopting the low alcohol, and the yield reaches 99% or above.

The invention discloses a chemical injection, and particularly relates to a preparation method of a clindamycin phosphate injection. The clindamycin phosphate injection is prepared from the following raw materials in grams: clindamycin phosphate 300-400 g and sodium hydroxide 24.3-25.5 g. The preparation method comprises the following steps: dissolving 24.3-25.5g of sodium hydroxide in 1500-1900 g of water for injection, dissolving 300-400 g of clindamycin phosphate in the sodium hydroxide solution, stirring uniformly, adding water for injection to a constant volume of 2,000 mL, performing coarse filtering with a 0.65 mu m microporous filter membrane, performing fine filtering with a 0.22 mu m microporous filter membrane for sterilizing, and filling to obtain the clindamycin phosphate injection. The preparation method provided by the invention has the characteristics of applicability to mass production, high product yield, stable drug quality, and good therapeutic effect of drugs.

The invention relates to a method for preparing clindamycin phosphate, belonging to the field of medicine technologies. According to the method, clindamycin phosphate containing dehydro-clindamycin phosphate is taken as a raw material and dissolved into water or water-containing alcoholic liquid, 1/5-1/100 of the raw material amount of palladium carbon is added, hydrogen is introduced to react for 1-48 hours while stirring, the dehydro-clindamycin phosphate is enabled to fully produce the clindamycin phosphate, and then crystallization is carried out. The method has the advantages that the dehydro-clindamycin phosphate can be enabled to fully produce the clindamycin phosphate, so that the content of impurities in drugs is reduced, and the quality of the drugs is improved.

The invention provides a detection method of related substances in clindamycin phosphate gel. The detection method is established on the basis of screening of preparation conditions of a sample solution, purification in pretreatment of the gel and screening of chromatographic conditions. Methodology validation research proves that the method has high accuracy and specificity and is good in repeatability and durability. By controlling the related substances in the clindamycin phosphate gel, the quality of a product is improved.

Relating to the field of medical technologies, the invention provides a new dosage form of clindamycin phosphate, i.e. preparation and application of temperature sensitive and pH sensitive clindamycin phosphate in-situ gel. The gel is characterized by preparation and application of the gel that is a solution under a nonphysiological state and is gel through phase transition under a physiological state. The temperature sensitive and pH sensitive clindamycin phosphate gel is finally prepared with Poloxamer 407 (F127 for short) and Poloxamer 188 (F68 for short) in a proper ratio. The pH sensitive in situ gel is prepared by Carbopol 980 and Poloxamer F127 in a proper ratio. The gel has viscosity of less than 1100mpa.s under a nonphysiological condition and viscosity of greater than 2500mpa.s under a physiological condition with pH of 4.5. The gel prolongs the detention time of clindamycin phosphate in the vagina and improves the bioavailability and curative effects, thus boasting good application prospects.