104 results about "Gemcitabine Hydrochloride" patented technology

The invention relates to a compound in a formula (I), and discloses a method for preparing gemcitabine hydrochloride. The method includes preparing an intermediate type (III) compound by means of realizing Reformatsky reaction, removing a protecting group and realizing lactonization and double benzoylation; obtaining a compound in a formula (VI) via reduction, methyl sulfonylation and condensation; and finally removing a protecting group, saltifying and realizing crystallization to obtain a final product. The method is simple in process, high in yield and quite suitable for industrial production, the purity of the product is fine, and harsh reaction conditions are omitted.

A solution-type injection of Jixitabin hydrochloride features that it contains alkaline substance or weak acid's salt as stabilizer.

This invention relates a method of treating hyperproliferative diseases. More particularly, the present invention relates to a method of treating hyperproliferative diseases, such as cancer, comprising the step of administering to a mammal in need of such treatment, either simultaneously or sequentially, (i) a therapeutically effective amount of a taxane derivative, a platinium coordination complex selected from the group consisting of carboplatin, tetraplatin, and topotecan, a nucleoside analog selected from the group consisting of gemcitabine hydrochloride and 5-FU, an anthracycline, a topoisomerase selected from the group consisting of etoposide, teniposide, amsacrine, topotecan, and Camptosar®, an aromatase inhibitor; and (ii) a therapeutically effective amount of an isothiazole derivative. The combinations of the present invention may optionally include an anti-hypertensive agent. This invention also relates to pharmaceutical compositions useful in the treatment of hyperproliferative diseases in mammals, containing such combinations. The present invention also relates to kits having a first compartment with a compound of formula 1 and a second compartment containing a taxane derivative, a platinum coordination complex, a nucleoside analog, an anthracycline, a topoisomerase inhibitor, or an aromatase inhibitor and a third compartment containing an anti-hypertensive agent.

The invention discloses a synthesis method of gemcitabine hydrochloride. The gemcitabine hydrochloride has a molecular formula of C9H11F2N3O4.HCl, the molecular weight of 299.66 and a chemical abstracts service (CAS) registry number of 122111-03-9. The synthesis method of gemcitabine hydrochloride has the advantages of high yield, easiness of preparation of gemcitabine hydrochloride GH-7 having a single configuration, convenience of operation, and relatively stable configuration.

The present invention discloses a gemcitabine hydrochloride lyophilized preparation. The lyophilized preparation comprises, by weight, 20-70 parts of gemcitabine hydrochloride, 15-60 parts of a lyoprotectant and 0.005-0.5 parts of an antioxidant. Compared to the prior art, with the gemcitabine hydrochloride lyophilized preparation provided by the present invention, the problem of the stability ofthe gemcitabine hydrochloride is solved; the product quality is ensured; the risk of drug using is reduced; the preparation process is simple, the cost is low; and the preparation is suitable for theindustrial production, and has practical value.

The invention discloses the compounding method for hydrochloric acid Gemcitabine. It uses D-mannitol as raw material and takes the processes of hydroxyl protection, oxidation, and addition of reformatsky, hydroxy benzoylation, hydrolysis, hydroxyl sulfonylation, ring closure, carbonyl reduction, hydroxyl sulfonylation, condensation, hydrolysis and crystallization to gain hydrochloric acid Gemcitabine. It has the advantages of high yield, simple operation, and is suitable to industrial producing.

The invention belongs to technical field of pharmacy and provides a method for preparing gemcitabine hydrochloride, which solves the problems that the industrialization cost is high and the total yield is low in the original preparation method of gemcitabine hydrochloride. The method comprises the steps of a. converting and extracting alpha anomer of a formula (II) from a formula (I); b. coupling the formula (II) and a formula (III); and c. obtaining the gemcitabine hydrochloride of a formula (V). The step a comprises the steps of (1) dissolving the compound with the formula (I) in an aprotic solvent at least containing R1OH and three-level organic amine salified by R1OH, heating and reflowing, then reducing temperature so as to increase the mole ratio of the Alpha anomer of the formula (II) in the Alpha anomer mixer of the formula (I); (2) extracting the compound with the formula (I), reducing the temperature under recrystallization liquid so as to recrystallize the extracted product to obtain a solid Alpha anomer of the formula (II) and recrystallization liquid of the formula (I).

The invention relates to a synthesis process of industrial production of gemcitabine hydrochloride and pertains to the field of chemical product synthesis process. The invention takes 2, 3-oxygen-isopentylidene-D-glyceraldehyde as the raw materials and respectively uses TBDPSCl and benzoyl chloride to protect hydroxyl to produce an intermediate after addition, ring opening and cyclization. The intermediate is condensed with cytosine after reduction and methyl sulfonylation and then acquires gemcitabine hydrochloride after de-protection and salification. The invention has the advantage that TBDPSCl is adopted to protect one of hydroxyls, thus increasing the stability of the intermediate double benzoyl and facilitating the separation and purification of the product. The invention solves the problem in the prior gemcitabine hydrochloride production process that the intermediate double benzoyl protector is unstable and easily de-protected in alkalescence, thus affecting the product quality and yield. The total yield of the synthesis process is 17.9 percent and the purity is above 99.8 percent, thus being particularly applicable to the industrial production of gemcitabine hydrochloride.

The present invention discloses stable supersaturated gemcitabine hydrochloride solution and its preparation process. Gemcitabine hydrochloride in certain amount is heated in pH 4-8 condition for being dissolved completely to obtain supersaturated gemcitabine hydrochloride solution of 45 g/l concentration, higher than the saturation concentration at 23 deg.c, and the supersaturated gemcitabine hydrochloride solution is packed in single dosage container while the solution is still hot. The supersaturated gemcitabine hydrochloride solution may be maintained at room temperature without separating out, and filling nitrogen and/or adding antioxidant can further raise the chemical stability. It may be used in preparing gemcitabine hydrochloride preparation for intravenous injection.

A process for isolating β-anomer enriched Gemcitabine hydrochloride by converting Gemcitabine base into Gemcitabine hydrochloride followed by its purification using solvents from the series of water soluble ethers like 1,4-dioxane or Monoglyme.

The invention belongs to the drug synthesis field, and provides a novel method for synthesizing gemcitabine hydrochloride. In the method, 2-deoxy-2,2-difluoro-D-erythro-pentafuranous-one-3,5-dibenzoate (bifluoro-sugar for short) is taken as the primary raw material, and then the primary raw material is subjected to steps of reduction, methyl-sulfonylation, condensation, deprotection, salt forming, separation, and refinement so as to obtain the finished product. The method has the advantages of simple technology, high yield, high purity (which can reach 99.8% or more), and more suitability for industrial production.

The invention discloses gemcitabine hydrochloride lyophilized powder for injection. The gemcitabine hydrochloride lyophilized powder consists of the following components in parts by mass: 100 parts of gemcitabine hydrochloride, 160-180 parts of lactose and 3-6 parts of sodium citrate. As proved by influencing factor testing investigation, each detection index the gemcitabine hydrochloride lyophilized powder for injection prepared by adopting a formula and a process provided by the invention does not change remarkably in a high-temperature, high-humidity and strong-light-irradiation environment, and high stability is achieved.

The present invention provides a highly stereoselective, simple and economical glycosylation process for preparation of β-anomer enriched 2¹-deoxy-2¹,2¹-D-ribofuranosyl difluoronucleosides of formula (II), and physiologically acceptable slats thereof, in particular, the β-enriched anomer of gemcitabine hydrochloride of formula (IIb) in purity of >99% is provided through utilization of a novel trichloroacetimidate of formula (I).

The invention relates to an industrialized gemcitabine hydrochloride synthesis method, and belongs to the field of chemical product synthesis process. According to the invention, 2'-deoxy-2',2'-difluorocytidine-3',5'-dibenzoate is subjected to benzoyl protecting group removing in a methanol solution comprising ammonia water, and salt-formation is proceeded, such that 2'-deoxy-2',2'-difluorocytidine hydrochloride is formed; and crystallization and separation is carried out in an acetone-water mixed solvent, such that a gemcitabine hydrochloride pure product is obtained. According to the invention, a commonly used method for adding ammonia gas in the step 1 is changed into adding concentrated ammonia water; and a freezing crystallization overnight operation is adopted in subsequent purification process, such that process operability is increased, and reaction yield is improved. The synthesized process product has high refined rate. The purity of the product is maintained above 99.8%.

The invention relates to gemcitabine hydrochloride injection and a preparation method of the gemcitabine hydrochloride injection. Specifically, 1ml of gemcitabine hydrochloride injection comprises the following components of 30-70mg of gemcitabine hydrochloride, 1-5mg of NaCl, 10-50mg of hydroxypropyl-beta-cyclodextrin and 1-10mg of pH (Potential of Hydrogen) regulator. The gemcitabine hydrochloride injection provided by the invention is better in stability, simple in preparation and convenient in use, and can reduce the pollution ways of drugs.

The invention discloses preparation method of a gemcitabine hydrochloride freeze-dried powder injection, which comprises the following steps of: Controlling the inlet temperature of the conducting oil within 20oC+-5 oC and putting the gemcitabine hydrochloride solution into the freeze-drying box; Conductng pre-freeze; Reducing the conduction oil inlet temperature at a full speed to - 2oC and keeping the temperature for 2 hours. Reducing the conduction oil inlet temperature at a full speed to -45oC and keeping the temperature for 4 hours. After the pre-freeze is completed, confirming that the condenser temperature has reduced to be lower than 45oC. Then pumping ultimate vacuum. When the vacuum degree reaches 10Pa , reducing the conduction oil inlet temperature from -45 oC to 20 oC and opening the vacuum control. Adjusting the vacuum control range of the front box to 35+-5Pa and keeping the temperature for 4 hours till the water trace disappears. Heating up the plate at a full speed to 30oC and maintaining it for 4-6 hours. Then stopping the vacuum control. Keeping maintaining the temperature for 1 hour. Testing that the pressure rise range does not exceed 2Pa within 15 minutes. Taking the gemcitabine hydrochloride solution out of the box. This preparation method can reduce the cost of freeze-drying, improve production efficiency and increase the production capacity to the utmost.

The invention relates to the field of pharmaceutic preparations and discloses a method for preparing gemcitabine hydrochloride lyophilized powder. According to the method for preparing the gemcitabine hydrochloride lyophilized powder, a primary pre-freezing process and a stage drying process are used for lyophilization; appropriate vacuum degrees and temperature are matched at all drying stages to avoid the problem that hydrochloric acid is removed from gemcitabine hydrochloride under high vacuum degree, and drying efficiency is low due to low vacuum degree; meanwhile, temperature is slowly raised at different speed at different drying stages, and the problem that the gemcitabine hydrochloride is deacidified due to too high heating speed can be solved. Compared with the prior art, the method for preparing the gemcitabine hydrochloride lyophilized powder has the advantages that the method is easy to operate, lyophilization time is short, and drying temperature is low; the prepared gemcitabine hydrochloride lyophilized powder product is high in outer structural quality and redissolution performance; a redissolution solution is clear and transparent, and opalescence is avoided; relative substances are low in content, and the prepared gemcitabine hydrochloride lyophilized powder is safe and reliable in quality; and the method is suitable for preparing the gemcitabine hydrochloridelyophilized powder and can be widely applied to large-scale production of the gemcitabine hydrochloride lyophilized powder.