39 results about "Flucytosin" patented technology

The invention discloses a method for preparing an anticancer medicine capecitabine and a hydroxyl derivative key intermediate thereof, and belongs to the technical field of pharmaceutical chemistry. The method is characterized in that: N-[(p-pentyloxy)carbonyl]-5-flurocytosin is taken as an initial raw material, and is subjected to five steps of chemical reactions to form the capecitabine. The preparation method has the advantages of reasonable sequence, readily available raw materials, mild reaction conditions, high process controllability, high yield and low cost. The crude intermediate has high purity, complicated purification treatment is avoided, the capecitabine obtained in a later stage can reach the standard of United States Pharmacopeia, and the method is more suitable for industrial production.

The invention relates to a novel technology for synthesis of capecitabine. The technology is characterized in that: 5-fluorocytosine protected by trimethyl silicon is taken as raw material; and the capecitabine is obtained after condensation, esterification and deacetylation. The Reaction sequence is more economically reasonable, the synthetic route is short, the cost is low, the operation is simplified, the yield is high, the synthetic period is short, the quality of intermediates can be controlled, solvents used in reaction are few, pollution to the environment is little, and the technology is suitable for industrial production. Comparing the technology with the prior art for capecitabine production, trimethylsilyl trifluoromethanesulfonate (TMSOTf) which replaces a heavy metal agent stannic chloride is used as a condensing agent for glycosylation (condensation), and a sodium methoxide / methanol system replaces an ammonia gas / methanol system for deacetylation, so that the production yield is increased, and heavy metal residues of the products and the environmental pollution are reduced. The overall yield of the technology of the invention reaches 59%, the purity of the production is high and meets the standards of the United States Pharmacopeia.

The invention discloses a preparation method of 2',3'-bi-O-acetyl-5'-deoxy-5-fulurocytidine. The preparation method comprises the following steps of: carrying out glycosylation reaction on 1,2,3-tri-O-acetyl-5-deoxyribose and bi-silanized 5-fluorocytosine under the catalysis of polymer-supported lewis acid which can be separated and reused for multiple times to obtain reaction liquid, and separating and purifying the reaction liquid to obtain a high-purity important capecitabine intermediate, namely the 2',3'-bi-O-acetyl-5'-deoxy-5-fulurocytidine. According to the preparation method, the catalyst is stable and efficient, can be easily separated from a reaction system and is free of pollution and single in stereoselectivity; the content of an Alpha isomer in the reaction liquid is smaller than 1.4 percent and can be removed by recrystallization; and the 2',3'-bi-O-acetyl-5'-deoxy-5-fulurocytidine has the optical purity up to 99.6 percent and is suitable for industrial production.

The invention discloses a synthetic method for capecitabine key intermediate 2`,3`-O-diacetylpyridine-5`-deoxygenation-5-fluorine-N4-[(pentyloxy) carbonyl] cytidine. The synthetic method for the capecitabine key intermediate comprises the following steps that 1, 5- fluorocytosine, an acid-binding agent, chloroform, water and phase transfer catalyst are mixed, pentyl chloroformate is added dropwise under stirring, and the chloroform solution of (5-fluorine-2-oxo-1,2-dihydropyrimidine-4-base) amylcarbamate is obtained; 2, 1,2,3-three-O-acetyl-5-deoxygenation-6- ribofuranose is added into the chloroform solution obtained in the step 1, lewis acid is added dropwise, the reaction is performed for 2-10 hours after adding, and the capecitabine key intermediate is obtained after post-processing. The synthetic method is simple and convenient in operation, a silicane protective agent and intermediate product purification are not needed, the high yield of finished products is achieved, the proportion of alpha isomer in the products is effectively controlled, and compared with literature data, the purity of the obtained products is greatly improved.

The invention provides a preparation method of capecitabine intermediate 2',3'-di-O-acetyl-5'-deoxy-5-fluorocytidine, which is suitable for actual industrial big production and has the advantages of high yield and quality and fine stability. The preparation method of capecitabine intermediate comprises the step of innovatively using a trifluoromethanesulfonic acid trimethylsilyl ester catalyst as the silanization agent of 5-fluorocytosine. The method has the advantages of high yield and good quality, and the process is simple and easy to operate.

A compound method of high-yield nucleoside phosphorylase strains and arabinose nucleoside pertains to biochemical engineering field, in particular to the high-yield nucleoside phosphorylase strains and a method for compounding arabinose purine nucleoside with the strains by an enzyme method. The invention aims at solving a technical problem for providing the strains of the high-yield nucleoside phosphorylase and strains of uridine phosphorylase and the method for producing the arabinose purine nucleoside with the strains. The invention discloses enterobacter aerogenes with a preservation number of CGMCC No.2035 and the method for producing the arabinose purine nucleoside with the strains, and the invention comprises steps that (1) the enterobacter aerogenes DWOQ-58 of the invention is cultured and collected, and (2) the enterobacter aerogenes DWOQ-58 is contacted with arabinose donor and receptors of purine base. The strains of the invention are rich in vigor and resists 5-flucytosine with an average conversion rate of more than 80 percent in general and the reaction time of the invention is shortened to less than 12 hours.

The invention discloses hemi-5-fluorocytosine salt, as well as a preparation method and application thereof. The salt adopts acesulfame salt, and mainly composed of 5-fluorocytosine cation (FCH+), 5-fluorocytosine neutral molecule (FC) and acesulfame anion (AH-) according to the molar ratio of 1 to 1 to 1, the crystal cell of the salt belongs to an anorthic system, has the axial length a being equal to 7.2613(2)A, b being equal to 10.5289(3)A, and c being equal to 11.6662(4)A, and has the axial angle Alpha being equal to 66.8180(11) degrees, Beta being equal to 82.0220(12) degrees, and Gamma being equal to 78.5670(12) degrees. The hemi-5-fluorocytosine salt provided by the invention can effectively solve the problem of low moisture stability of the 5-fluorocytosine,and has excellent and effective medicine content and heat stability, the preparation technology of the hemi-5-fluorocytosine salt is simple, the operation is easy, the cost is low, poisonous solvent residue is avoided, meanwhile, the object molecule component serves as a sweetener, the medical mouthfeel can be improved, and the hemi-5-fluorocytosine salt is applicable to pharmaceutical industry.

The invention discloses a preparation for treating, preventing and / or slowing down uveal melanoma, the preparation comprises oncolytic herpes simplex virus type 1 capable of expressing cytosine deaminase genes and 5-fluorocytosine, and the oncolytic herpes simplex virus type 1 and the 5-fluorocytosine are combined to significantly reduce the volume of the uveal melanoma and improve the lifetime ofa subject. The invention further discloses a marker for evaluating the treatment effect of uveal melanoma through the preparation, and the marker is selected from markers capable of representing theepithelial-mesenchymal transition degree and mainly comprises IL-6, DPD, TWIST1, ZEB1, CD44 and CDH1.

The invention discloses a method for synthesizing flucytosine and belongs to the field of nucleoside synthesis in organic chemistry. The method comprises the following reaction steps: subjecting cytosine salt 1, which serves as a raw material, to a reaction with fluorine gas by taking water as a solvent so as to obtain an intermediate 2, then, subjecting the intermediate 2 to a reaction with an organic base, carrying out dehydrating so as to obtain crude 5-flucytosine, and carrying out water refining, thereby obtaining the 5-flucytosine 3. According to the method, the operation is simple, theemploying of solvents with relatively large danger such as hydrofluoric acid is avoided, the corrosiveness to equipment is also lowered greatly, and meanwhile, the production cost is reduced, so thatthe method is relatively applicable to industrial production.

The invention discloses a 5-fluorocytosine fluorination reactor with the stirring function. The outer surface of a barrel (1) is sleeved with a cooling jacket (2); the middle of the upper portion of the barrel (1) is provided with a solid material adding device (12); one side of the upper portion of the barrel (1) is provided with a gaseous phase outlet (10) which is internally provided with an electric discharging valve (8); the other side of the upper portion of the barrel (1) is provided with a temperature measuring sleeve (7); the upper portion of the temperature measuring sleeve (7) is located outside the barrel (1); the lower portion of the temperature measuring sleeve (7) is located in the barrel (1); the upper portion of the side face of the barrel (1) is provided with a fluorine and nitrogen inlet pipe (4) which is communicated with the interior of the barrel (1); a gas distributor (5) is arranged at the bottom of the barrel (1); a cooling coil pipe (3) is arranged on the inner surface of the barrel (1); a stirrer (6) is arranged at the center of the barrel (1); a liquid level meter port (9) is formed in the side face of the lower portion of the barrel (1); a liquid phase discharge port (11) is formed in the bottom of the barrel (1).

The invention provides a novel process for preparing an emtricitabine intermediate, namely, a compound shown in the formula (1) in the description, and relates to the field of medicine synthesis. The novel process includes the steps that (2R,5R)-5-hydroxy-1,3-oxathiolane-2-carboxy l-menthyl ester is subjected to triphosgene chlorination and reacts with 5-flucytosine protected with silane, and then the fine compound in the formula (1) is obtained through hydrolysis and crystallization with acetonitrile. The total yield reaches 85% or above, the purity is 99.7% or above, andany individual impurity is 0.2% or below; triphosgene replaces thionyl chloride for chlorination of (2R,5R)-5-hydroxy-1,3-oxathiolane-2-carboxy l-menthyl ester, operation is convenient, corrosivity is small, and the service life of equipment can be prolonged; sodium iodide is added into a silanization reaction of 5-flucytosine, and the yield is greatly increased.

The invention discloses a 5-flucytosine salt as well as a preparation method and application thereof. The 5-flucytosine salt is an acesulfame salt, and mainly comprises 5-flucytosine cation (FCH+), acesulfame anion (AH-) and hydrone (H2O) according to the molar ratio of 1:1:0.5, wherein the structure cell belongs to a monoclinic system; the axial length a is equal to 26.3596 (11) angstroms; b is equal to 5.8523 (3) angstroms; c is equal to 32.3137 (11) angstroms; the axial angle alpha is equal to 90.00 degrees; beta is equal to 105.987 (4) degrees; gamma is equal to 90.00 degrees. The 5-flucytosine salt disclosed by the invention can effectively solve the problem that 5-flucytosine is low in humidity stability; the 5-flucytosine salt is of high heat stability, and can be prepared by conventional methods such as a lyophilization method and a solution crystallization process; the preparation method is simple in process, easy in operation, low in cost and free of poisonous solvents; in the meantime, as a sweetening agent, the guest molecule can improve the taste of a drug, and can be applied to the pharmaceutical industry.

The invention provides a preparation method of a capecitabine intermediate 2', 3'-di-O-acetyl-5'-deoxy-5-fluorocytidine, which is suitable for actual industrial mass production and has the advantages of relatively high yield, quality and good stability. The preparation method of the capecitabine intermediate comprises the following steps: creatively converting substrates 5-fluorocytosine and 5-deoxyribose-1-phosphate to 5'-deoxy-5-fluoro-cytidine by using an enzyme catalyst pyrimidine nucleoside phosphorylase (EC2.4.2.2), and further performing acetylation reaction on the 5'-deoxy-5-fluoro-cytidine to obtain the 2', 3'-di-O-acetyl-5'-deoxy-5-fluorocytidine. The method has the advantages of high yield and good quality and is in line with environmental protection requirements; the process is simple and easy to operate.

The invention relates to a 2',3'- di-O-acetyl-5'-deoxy-5-fulurocytidineonium compound of formula (I) or a solvate thereof. The compound is prepared by using 5-deoxy-1,2,3-tri-O-acetyl-beta-D-ribofuranose as a raw material, carrying out condensation reaction on 5-deoxy-1,2,3-tri-O-acetyl-beta-D-ribofuranose and protected 5-flucytosine under the activation of iodotrimethylsilane to obtain a reaction product, and carrying out deprotection, acidification and crystallization. According to the invention, a novel intermediate for synthesizing Capecitabine is developed, one pot process is adopted for reacting to obtain the 2',3'- di-O-acetyl-5'-deoxy-5-fulurocytidineonium compound, and high-purity Capecitabine can be further synthesized by using the 2',3'- di-O-acetyl-5'-deoxy-5-fulurocytidineonium compound as a key intermediate. The compound has the characteristics of clear structure, high purity and stable quality. The use of the compound to synthesize Capecitabine can reduce reaction steps, control process cost, and reduce environmental pollution.

The invention discloses a preparation method of a capecitabine intermediate suitable for industrial production. The preparation method of the capecitabine intermediate comprises the following steps: carrying out feeding reaction, namely adding acetonitrile, 5-flucytosine, hexamethyldisilazane, trifluoromethanesulfonic acid, 1,2,3-triacetoxy-5-deoxy-D-ribose and trifluoromethanesulfonic acid into a reaction kettle, and performing stirring; carrying out concentrating reaction, namely performing reduced pressure distillation on the solution in the reaction kettle until the volume is 4 times of the reference volume, and adding dichloromethane which is 5-6 times of the reference volume and a sodium bicarbonate solution with the concentration of 8.9 mol / L; carrying out liquid separation and extraction to obtain an aqueous phase and an organic phase; carrying out equal-liquid-level distillation, namely distilling the organic phase until the volume of the liquid is 2.5 times of the volume of the starting material, maintaining the liquid level by continuously replenishing isopropanol in the subsequent distillation process, and replenishing isopropanol to the distillation end-point liquid level after dichloromethane in the system is removed; and then, carrying outcrystallization and filtration drying to obtain the capecitabine intermediate. According to the method, conventional distillation replacement is replaced by equal-liquid-level distillation operation on time; and moreover, the preparation route is further optimized. Thus, the method is suitable for industrial production and popularization of capecitabine intermediates.