77 results about "Tulathromycin" patented technology

The invention discloses a novel method for preparing tulathromycin and relates to a semi-synthetic macrolide antibiotic. The method comprises the following steps: simultaneously protecting 2'-hydroxyl and 6a-amino of desmethyl azithromycin with acetyl, then carrying out oxidation and epoxidation on 4''-hydroxy, then removing the protecting groups under alkaline alcohol solution conditions, and carrying out nucleophilic addition on 4''-epoxy group with n-propylamine to obtain the target compound tulathromycin. Compared with the prior art, the method for preparing tulathromycin has the advantages of simple process, mild conditions, high yield and the like, and is beneficial to industrial production.

The invention provides a method for preparing a tulathromycin compound. The method comprises the steps that: demethylated azithromycin is adopted as a raw material; and reactions such as substitution, oxidation, addition, reduction, condensation, and the like are carried out, such that a target compound is obtained. According to the invention, a cheaper raw material is adopted, and a traditional process employing low-temperature reaction is changed. The method has the advantages such as short process route, easy-to-control reaction, high yield, and the like. The method is suitable for large-scale industrialized productions.

The invention discloses combination of tulathromycin and poloxamer 407. The technology comprises the following steps: preparing medicine-carrying micro-particles; further dispersing the medicine-carrying micro-particles into oil medium; and preparing a long-acting oil injection containing tulathromycin and poloxamer 407 medicine-carrying micro-particles in a grinding manner. The injection is simple in preparation technology, good in slow-release effect, good in biocompatibility, and free of an irreversible damage to the tissue of the injection part.

The invention relates to the field of chemical synthesis and particularly relates to a preparation method of tulathromycin. The method comprises protecting a 2-hydroxyl group of demethyl azithromycin through 4-nitrobenzyl chloroformate, carrying out oxidation and epoxidation on a 4"-hydroxyl group, and carrying out deprotection and 4"-epoxy nucleophilic addition through n-propylamine to obtain tulathromycin. Comprised with the prior art, the preparation method has simple processes, mild conditions and a high yield, is free of palladium-carbon hydrodeprotection and is conducive to industrial production.

The invention relates to a compound oral medicine composition for treating respiratory disease of animals, in particular to a compound oral medicine composition for treating the respiratory disease of pigs and cattle. The composition contains tulathromycin with effective quantity and nonsteroidal antipyretic and analgesic.

The invention provides a synthetic method of high-purity tulathromycin. The method includes subjecting demethylated azithromycin adopted as a raw material to substitution, oxidation, addition, reduction, condensation, and the like, so as to obtain a target compound. According to the synthetic method, the cheaper raw material is adopted, and a traditional process employing low-temperature reaction is changed. The method has the advantages of short process route, easy-to-control reaction, high yield, and the like. The method is suitable for large-scale industrialized production.

The invention discloses an application of a tulathromycin composition in treatment or prevention of bacterial diseases of poultry. The invention further discloses a pharmaceutical composition containing tulathromycin and a preparation method thereof, and the composition has wide distribution in a poultry body, large apparent distribution volume, long half-life period and slow elimination, has the characteristics of small dosage and good efficacy when being used for treating the bacterial diseases of the poultry, and further has broad market prospects and value when being applied in the preparation of the drugs which are widely clinically used in veterinary.

The invention provides a tulathromycin intermediate, a preparation method of the tulathromycin intermediate and a preparation method of tulathromycin. According to the preparation method, Erythromycin A (E) oxime used as a starting material is subjected to acetyl protection, Albright-Goldman oxidation, Corey-Chaykovsky epoxidation, deprotection, Beckmann rearrangement, reduction and hydrolysis, and n-propylamine ring opening to synthesize tulathromycin. The preparation method has mild conditions, has the advantages of convenient operation, high yield and low cost and is beneficial to industrial production, and the raw materials are easily available.

The invention discloses a tulathromycin A synthesis method and belongs to the technical field of medicine synthesis. The tulathromycin A synthesis method comprises 1, dissolving a compound 2 into a solvent 1 and carrying out a reaction process on n-propylamine at a temperature of 20-80 DEG C, 2, after the reaction, according to reaction product benzyloxycarbonyl removal cases, directly carrying out a reaction process at a temperature of 20-80 DEG C, or adding a deprotection regent into the reaction product and then carrying out a reaction process on the mixture at a temperature of 20-80 DEG C, and separating the reaction products to obtain a tulathromycin A crude product, and 3, purifying the tulathromycin A crude product to obtain a tulathromycin A refined product. The tulathromycin A synthesis method realizes deepoxidation and deprotection by one process, shortens reaction time, improves reaction efficiency and reduces a cost.

The invention discloses a new route for synthesizing tulathromycin. The new route for synthesizing the tulathromycin is different from the previous epoxidation reaction, ring-opening reaction and the like reaction process. The new route for synthesizing the tulathromycin uses Passerini reaction, all the groups are led in by one time, and then the tulathromycin is obtained through Clemmensen reaction and hydrogenation reduction reaction. The new route for synthesizing the tulathromycin includes steps that taking hydroxyl protecting demethylation azithromycin, generating hydroxyl protecting ketone (compound I) through oxidation reaction, leading amido bond and cyclopropyl to a ketone-hydroxyl group position, generating (compound II), reducing the hydroxyl into methylene through Clemmensen reaction, generating (compound III), carrying out hydrogenation and ring opening on cyclopropyl to generate n-propyl through ring-opening reaction, and obtaining the tulathromycin (compound IV). The new route for synthesizing the tulathromycin is simple in process, easy to implement, easy to obtain reaction reagent, moderate in reaction condition, high in selectivity, less in by-product, easy to purify and low in facility request.

The invention discloses a method for preparing tulathromycin compound by taking demethylated azithromycin as a raw material. The preparation method comprises the following steps: by taking the demethylated azithromycin as a raw material, performing substitution, oxidation, addition, reduction and condensation reactions, thereby obtaining a target compound. The method has the advantages that the compound is high in antibacterial activity and wide in antibacterial spectrum and has ultra-long half-life period, the whole treatment process is finished by single-dose, and the like.

The invention discloses a synthesis method of a half-antigen and a complete antigen of tulathromycin and belongs to the technical field of immunology. The method synthesizes the half-antigen of tulathromycin by carrying out hydroxyl on tulathromycin by a succinic anhydride method and introducing free carboxyl. Derivated free carboxyl reacts with primaquine of bovine serum albumin to form an amido bond for coupling by an active ester method to form the complete antigen of tulathromycin. After the antigens are used for immunizing a Balb/c mouse for three times, the valence can reach 1:8000. The antigens have wide practical application prospects.

The invention belongs to the technical field of chemical synthesis, particularly a chemical synthesis method of a tulathromycin residue marker named 3-decladinosyl-9-deoxy-9-dihydro-9a-aza-9a-homoerythromycin A. The method is characterized by comprising the following steps: carrying out Beckmann rearrangement reaction on the raw material erythromycin A (E) oxime to obtain erythromycin A 6,9-imino ether, reducing with sodium borohydride to obtain nitroerythromycin, hydrolyzing under acidic conditions to remove cladinose to obtain a 3-decladinosyl-9-deoxy-9-dihydro-9a-aza-9a-homoerythromycin A crude product, and repeatedly recrystallizing to obtain the pure product of which the HPLC (high performance liquid chromatography) purity is up to higher than 99.5%. The method has the advantages of simple technique and high reaction yield. The product has high purity and can be used as a standard substance candidate of the tulathromycin residue marker.

The invention belongs to the technical field of pharmacy, and provides a tulathromycin liposome which comprises tulathromycin and a lipid material; the lipid material comprises phospholipid, and the weight ratio of the tulathromycin to the phospholipid is 1:1-20. The invention also provides a corresponding preparation method which comprises the following steps: 1) dissolving the lipid material in ethanol, and preparing a blank liposome suspension by a film dispersion method, an injection method, a reverse evaporation method, or a spray-drying method; 2) preparing gradient liposome; 3) adding an ethanol solution of tulathromycin, controlling the ethanol content of the system to be less than 15 V%, performing incubation at 45-75 DEG C for 2-60 min to obtain a tulathromycin-containing liposome suspension. Liposome is encapsulated by tulathromycin, which effectively improves the bioavailability of tulathromycin. The ethanol content is controlled in the preparation method, which contributes to the acquisition of higher encapsulation efficiency and appropriate particle size.

The invention relates to a preparation method of an injection containing azalide tulathromycin; the injection consists of tulathromycin, hydrochloric acid, propylene glycol, phenol and water used for injection. The preparation method comprises the steps of: adding a proper amount of the water used for injection into a stainless-steel liquid distributing tank, adding 5100g of a 10-percent (w/w) hydrochloric-acid water solution and stirring the solution evenly, slowly adding 104g to 208g of the tulathromycin into the solution, stirring the solution till the tulathromycin is dissolved, adding the 10-percent (w/w) hydrochloric-acid water solution to adjust the pH value to be 4.0 to 7.0, heating the solution to the temperature of 60 DEG C to 70 DEG C for 10min to 30min, adding and evenly stirring 500g of propylene glycol (a cosolvent) when the temperature reaches 25 DEG C, adding the 10-percent (w/w) hydrochloric-acid water solution to regulate the pH value to reach 5.4, adding 5g to 10g of the phenol as a preservative, adding the water used for injection till the total volume of the solution is adjusted to be 1000ml, filtering the solution by a 5-to-10-micron filter and a 0.45-micron filter in sequence, encapsulating the filtered preparation and sterilizing the preparation by a wet-heat high-pressure sterilizing method for 30min at the temperature of 121 DEG C.

The invention relates to large-loop type veterinary medicine antibiotics, in particular to a method for preparing tulathromycin. The method mainly solves the problem that in the prior art, the dosage of n-propylamine is large, and also solves the technical problems that due to the large dosage of n-propylamine, a crude product is not high in content and poor in character, and phosphate needs to be formed, neutralized and purified. The method comprises the steps that an epoxy intermediate, ethyl alcohol or isopropanol and N-benzyl propylamine are added into a reactor and stirred fully and evenly, and then heating and stirring are carried out for a reaction; after the reaction is finished, a solvent is removed, acetone is added, and the mixture is evenly stirred and then transferred into a pressure reactor; a palladium carbon catalyst is added in the pressure reactor, hydrogen is introduced, a reaction is carried out under stirring, the catalyst is recycled through filtering after the reaction is finished, concentration is carried out to remove the solvent, then water is added, filtering is carried out, separated-out solids are collected and subjected to vacuum drying, a tulathromycin crude product is obtained, and a fine tulathromycin product is obtained after recrystallization.

The invention discloses salt of tulathromycin, particularly oxalate, a preparation method of tulathromycin oxalate and application of tulathromycin oxalate to preparation of tulathromycin.

The invention provides an anti-infection pharmaceutical composition. The pharmaceutical composition contains an effective amount of a compound shown as a formula (I). The composition and pharmaceutically acceptable salt, ester, amide, stereoisomer or racemic mixture thereof can effectively prevent and treat various bacterial and protozoal infections, and have effect better than that of tulathromycin. The invention also relates to a preparation method and application of the compound.

The invention relates to a method for synthesizing a veterinary medicine, and in particular, relates to a method for enzymatic synthesis of tulathromycin. A compound II and a immobilized esterase are added to water, after each-time reaction, a mother liquor and the immobilized lipase only require to be filtered and separated, and the immobilized esterase only requires to be washed with deionized water and can be reused; the synthesis process has the advantages of simple technology, convenience in operation, short reaction time, high production efficiency, low cost and less pollution.

The invention discloses a telamycin related substance, its enrichment preparation method and application. The present invention provides a telamycin related substance 3 or a salt thereof. The present invention also provides a method for enriching telamycin-related substances 3, which includes the following steps: using high-performance liquid chromatography to elute the analyte in a chromatographic column, and collecting telamycin-related substances 3 is enough. The telamycin-related substance of the present invention is a necessity for quality control of the telamycin; the enrichment preparation method of the present invention can effectively separate the telamycin-related substance 3, thereby controlling the drug quality of the telamycin, for The study of unknown impurities of telamycin has laid a good foundation.

The invention discloses a salt for preparing a tulathromycin intermediate, and particularly relates to oxalate and a preparation method thereof as well as application of the oxalate in a method for preparing tulathromycin.