41 results about "Prulifloxacin" patented technology

The invention provides a preparation method of prulifloxacin using [(3,4-difluorophenyl)amido](ethylthio) methylene malonic ester as starting material, xylene or ion liquid as reaction medium, Lewis acid as catalyst to synthesize 6,7-difluoro-4-hydroxy-2-(ethylthio) quinoline-3-ethyl formate of formula (IV), synthesizing compound of formula (II) by reacting compound of formula (IV) with acetic anhydride, chlorosulfonic acid, sodium carbonate by way of multi-charging 'one-pot'; performing displacement reaction of the compound of formula (II) and piperazine of formula (V) in ion liquid to generate the corresponding compound of formula (VI); obtaining the compound of formula (VII) by hydrolyzing the compound of formula (VI), reacting the compound of formula (VII) with the compound of formula (IX) to obtain prulifloxacin of formula (I). The preparation method has features of high yield, high product purity, and simple technique, suitable for industrialization.

The invention discloses a novel process for preparing (+-)-6-fluoro-1-methyl-7-[4-(5-methyl-2-oxo-1,3-dioxolen-4-yl)methyl-1-piperazinyl]-4-oxo-4H-[1,3]thiazeto[3,2-a]quinoline-3-carboxylic acid, and medicinal compositions containing the compound, which can be used for treating bacterial infection for mammals, and especially has strong effect in resisting Gram-negative bacteria.

An optical active compound of anti-infective prulifloxacin and a preparation method thereof relate to an antimicrobial agent of optical active sulfur-nitrogen oxetane and quinoline carboxylic acid, and a preparation method. The compound of the invention takes the following formula 1 to show the compound and salt thereof, the stereo configuration is in S configuration, and the compound has the optical activity of levorotary deviated light; the compound and the salt for medical purpose can be added with pharmaceutical adjuvant to make into preparations for oral use; the method comprises: taking levorotary ulifloxacin as raw material, putting into an organic solvent, and reacting under the condition of the existence of alkali substance, with the reaction temperature of 20 DEG C below zero to 60 DEG C, and the reaction time of 15min to 24h. The levorotary prulifloxacin and physically allowed salt thereof can substitute for the existing antibacterial prulifloxacin and physically allowed salt thereof, not only antibacterial action is obviously improved, but also the toxicity is little.

This invention relates to preparation method of a compound as formulae(1). The chart is the structure of R.

The invention discloses a Prulifloxacin composition. The composition comprises the following components: 130 to 135 parts of Prulifloxacin, 35 to 45 parts of lactose, 9 to 10 parts of hydroxypropyl cellulose, 1.5 to 2.5 parts of magnesium stearate and 15 to 20 parts of povidone K30. Quality and yield of the Prulifloxacin are greatly improved by adjusting parameters during synthesis, such as addition speed of reactants. The method for preparing the composition comprises the following steps of preparing solution of povidone K30 ethanol; uniformly mixing the Prulifloxacin with the hydroxypropyl cellulose, and crushing the mixture with mechanical crusher; screening, and screening crushed lactose; adding lactose into mixed powder of the Prulifloxacin and the hydroxypropyl cellulose, and uniformly mixing with a three-dimensional mixer; then adding the prepared solution of povidone K30; uniformly mixing, granulating, and straightening granules after drying; and adding the magnesium stearate into the prepared granules and uniformly mixing with the three-dimensional mixer. The composition prepared by the method has advantages of good quality, less disintegration time and high dissolution efficiency.

The present invention aims at providing one kind of water soluble Prulifloxacin salt for muscular injection or intravenous injection and its proper injection form. The water solution of these soluble salts is easy to release Prulifloxacin salt, and the injection of Prulifloxacin salt has the same antiseptic effect as orally taken Prulifloxacin preparation. In addition, the injected medicine enters blood directly to produce treating effect and thus has faster effect and less medicine consumption compared with available orally taken form.

The invention discloses a preparation method for Prulifloxacin. By carrying out chlorination on N-Chlorosuccinimide and BF3 to generate an intermediate ethyl 6,7-difuoro-1-methyl-4-oxo-4H-[1,3]thiazete[3,2-a]quinoline-3-carboxylate, the invention not only greatly improves yield, but also avoids utilization of poisonous and volatile chlorosulfonic acid or sulfonyl chloride.

The invention relates to a synthetic method of prulifloxacin, comprising the steps of: stirring DMDO-Cl and sodium iodide in an organic solvent, carrying out a one-pot reaction of the unseparated reaction liquid, a compound 2 and alkali substances to obtain the prulifloxacin. The synthetic method of the invention is advantaged in that the raw material DMDO-Cl used in the invention is cheap, easily available, and easily stored and transported, the prulifloxacin synthesized by the method has high yield, increased purity, and the operation is convenient.

The compound prulifloxicin preparation is used in treating bacterial infectious diseases. The compound prulifloxicin preparation consists of prulifloxicin 50-600 mg, pidaomode 200-1600 mg and pharmaceutically acceptable supplementary material, and is prepared into various pharmaceutically acceptable preparation forms for treating bacterial infectious diseases clinically. It can raise bodyí»s immunity level to strengthen the exogenous bactericidal effect of prulifloxicin.

The invention discloses a new application of quinolone compounds as bactericides in prevention and treatment of bacterial diseases and citrus canker of crops. The quinolone compounds comprise floroxacin, enofloxacin, gatifloxacin, moxifloxacin hydrochloride, enrofloxacin, marbofloxacin, floxacin, mononorfloxacin mesylate, prulifloxacin, Balofloxacin, pazufloxacin mesylate, pipemidic acid, sparfloxacin, difloxacin hydrochloride, lomefloxacin hydrochloride, pefloxacin, tosufloxacin mesylate, Cinoxacin, galafloxacin, besifloxacin hydrochloride, ofloxacin, nalidixic acid, Clinafloxacin and Sitafloxacin. The quinolone compounds can be used for preventing and treating bacterial diseases caused by citrus canker pathogens, especially gatifloxacin, moxifloxacin hydrochloride, mononorfloxacin mesylate, sparfloxacin, tosufloxacin mesylate, clinafloxacin and sitafloxacin, has excellent bacteriostatic activity on citrus canker pathogens, and can be used for preventing and treating bacterial diseases of crops.

The invention discloses novel application of a fluoroquinolone medicine and application of the fluoroquinolone medicine in preparation of a sensitizer of a pseudomonas aeruginosa (P.aeruginosa) inhibitor. The fluoroquinolone medicine is prepared from gemifloxacin, sparfloxacin, enrofloxacin, ciprofloxacin, sarafloxacin, moxifloxacin, pefloxacin, tosufloxacin, orbifloxacin, prulifloxacin, marbofloxacin, levofloxacin, flumequine or/and pazufloxacin; the pseudomonas aeruginosa is pseudomonas aeruginosa DK2 or PAO1; the pseudomonas aeruginosa inhibitor is polymyxin B or colistin.

The invention belongs to the technical field of medicines, and relates to prulifloxacin tablets and a preparation process thereof. The prulifloxacin tablet contains an active component prulifloxacin or a pharmaceutical salt thereof, as well as a carbonate alkaline substance and pharmaceutically acceptable additives. The prulifloxacin tablets can be obtained by direct power tabletting or wet method granulation tabletting, and adopt a thin-film coating mode. In the prulifloxacin tablets, the medicament stability is greatly improved, the solubility of the medicament is increased, and the bitter taste of the medicament can be effectively covered.

The invention discloses a prulifloxacin oral solid composition and a preparation method thereof. The prulifloxacin oral solid composition is prepared from 130 to 135 parts by weight of prulifloxacin, 10 to 30 parts by weight of starch, 30 to 50 parts by weight of microcrystalline cellulose, 20 to 40 parts by weight of lactose, 0.05 to 10 parts by weight of one or more binders, 2 to 15 parts by weight of one or more disintegrants and 0.5 to 10 parts by weight of one or more lubricants. The one or more binders are selected from polyvinylpyrrolidone, lauryl sodium sulfate and polyethylene glycol mixed aqueous solutions or alcoholic solutions. The one or more disintegrants are selected from carboxymethyl starch sodium, polyvinylpolypyrrolidone and hydroxy propyl cellulose. The one or more lubricants are selected from magnesium stearate, calcium stearate and aerosil. The prulifloxacin oral solid composition can be processed into tablets, capsules or granules, has good stability, can effectively improve a dissolution rate, solves the problem that the existing prulifloxacin oral solid preparation has a slow dissolution speed, and improves bioavailability.

The present invention relates to processes for the preparation of Type I, Type II and Type III crystals of prulifloxacin.

The invention discloses prulifloxacin nano spheres and a preparation method thereof. The nano spheres solve the problems that prulifloxacin is not dissolved in water and has poor bioavailability and the like. The diameter of the nano spheres is below 100 nanometers, the sterile purpose can be fulfilled by filtering and removing bacteria, the stability is increased, the in vivo circular degradation speed is delayed, the stress effect is reduced, and the medicinal effect is improved. The prulifloxacin nano spheres consist of the following components by weight: 0.2 to 1.5 grams of prulifloxacin,15 to 45 grams of oil for injection, 10 to 25 grams of emulsifier, 10 to 25 grams of co-emulsifier, 8 to 13 grams of glycerol and 450 to 500 grams of water for injection.

The invention discloses a synthesis method of a prulifloxacin key intermediate. The prulifloxacin key intermediate is 7-chloro-6-fluoro-1-methyl-4-oxo-1H,4H-[1,3]thiazolo[3,2-a]quinoline-3-carboxylic acid ethyl ester (I), the synthesis method comprises the following steps: taking 1-(4-chloro-2,5-difluorophenyl)ethanone (II) as an initial raw material, carrying out Claisen condensation to obtain a compound (III), carrying out ethylation on the compound (III) to obtain a compound (IV), carrying out ammonolysis on the compound (IV) and an ammoniation reagent, carrying out cyclization reaction under the action of potassium carbonate to obtain a compound (VI), carrying out hydroxyl protection on the compound (VI) by using acetyl chloride to obtain a compound (VII), carrying out chlorination reaction on the compound (VII) and a chlorination reagent, and then performing cyclization reaction under the action of sodium acetate to obtain an intermediate target product. The synthesis method disclosed by the invention has the characteristics of simple process, simplicity and convenience in operation, mild reaction conditions, avoidance of use of toxic and harmful reagents, reduction of environmental pollution, higher total yield and the like, thereby having higher implementation value and social and economic benefits.

Prulifloxacin has low bioavailability due to poor water solubility. The invention relates to a novel prulifloxacin mesylate and a preparation thereof, a kit comprising an antibiotic preparation of the novel prulifloxacin mesylate, and application of the novel prulifloxacin mesylate in preparing an anti-bacterial infection medicine. Specifically, the invention particularly relates to a novel preparation for injection of a medicine, with a chemical name of 6-fluoro-1-methyl-7-[4-(5-methyl-2-oxo-1,3-dioxole-4-yl)-methyl-1-piperazinyl]-4-oxo-4H-[1,3]thiazeto[3,2-a]quinoline-3-mesylate, which can be stably stored. Prulifloxacin is directly injected for administration in the form of thiabutyldine quinoline mesylate, so that the solubility, bioavailability and curative effect of prulifloxacin are improved.