50 results about "Ledipasvir" patented technology

Disclosed are pharmaceutical compositions having an effective amount of substantially amorphous ledipasvir and an effective amount of substantially crystalline sofosbuvir.

The invention relates to a method for preparing (1R,3S,4S)-N-tert-butyloxycarbonyl-2-azabicyclo[2,2,1]heptane-3-carboxylic acid (formula V), wherein the formula V is defined in the instruction. The method comprises: dissolving glyoxylate in a solvent, cooling to a temperature of -10-0 DEG C, adding a dewatering agent and (R)-phenyl ethylamine, and at unit time intervals, sequentially adding an alcohol solvent, an additive, cyclopentadiene and palladium carbon to carry out catalytic hydrogenation and adding an inorganic alkali aqueous solution and Boc anhydride to carry out a reaction. Compared with the method in the prior art, the method of the present invention has the following significant advantages that: the reaction operation is simple, the multi-step reaction is changed into the one-pot method, the production period is shortened, the separation purification is simple, the single configuration target product can be obtained only requiring the recrystallization, the yield is high, the reaction is efficient, the atom economy is reflected, -78 DEG C and other harsh reaction conditions are abandoned, and the method is expected to be used in mass production.

The invention relates to a new preparing method of hepatitis c medicine Ledipasvir (I) and new intermediates used in the preparing method. The chemical formula of the Ledipasvir (I) is shown in the specification.

The invention discloses a preparation method of Ledipasvir. The method has no need for chromatographic column separation, reduces the cost of raw materials, and can acquire a high purity product by a simple precipitation or crystallization purification means, thus providing feasible technical conditions for large-scale industrial production.

The invention relates to a preparation method of a ledipasvir key intermediate, and concretely relates to a preparation method of t-butyl (1R,3S,4S)-3-(5-halo-1H-benzimidazolyl-2-yl)-2-azabicyclo[2. 2. 1]heptane-carboxylate. The method has the advantages of low price and massive commercial purchasing of a raw material, and complete avoiding of generation of disubstituted impurities.

The invention discloses a ledipasvir and sofosbuvir compound coating tablet preparation. The preparation is prepared from the following active ingredients in percentage by mass: 45.0-55.0 percent of ledipasvir and sofosbuvir, 2.0-8.0 percent of a disintegrating agent, 30-40 percent of a diluting agent and 0.5-1.5 percent of a lubricating agent, wherein the disintegrating agent is one or more of povidone, croscarmellose sodium, hydroxypropyl methylcellulose and sodium carboxymethyl starch; the diluting agent is one or more of microcrystalline cellulose, mannitol, lactose and polyethylene glycol; the lubricating agent is one or more of magnesium stearate, talcum powder, aerosil and calcium stearate. The ledipasvir and sofosbuvir compound coating tablet preparation is prepared by coating with a rhombic buccal tablet, and the tablet content has good uniformity. The preparation has the advantages of simple process, high yield, good stability and the like, and is easy for large-scale industrial production.

The invention provides a preparation method of a key intermediate 1-(7-bromo-9,9-difluoro-9H-fluoren-2-yl)-2-chloroethanone. The method comprises the steps as follows: 2-amino-5-bromobenzoic acid is taken as a raw material, and subjected to diazotization, iodination,synthesis of 5-bromo-2-iodobenzoic acid, methylation, coupling reaction with phenylboronic acid, ester hydrolysis, acyl chlorination,intramolecular Friedel-Crafts alkylation, carbonyl reduction, iodization, fluorination and final reaction with 2-chloro-N-methoxy-N-methylacetamide to prepare the target product. The process adopts easily available starting raw materials, is low in price and free of hazardous process and has mild reaction conditions..

The invention discloses a method for reducing content of a diastereoisomer impurity (Ia) in a Ledipasvir intermediate (1R,3S,4S)-N-t-butyloxycarboryl-2-azabicyalo[2.2.1]heptane-3-carboxylic acid (I). The method comprises the steps of firstly taking a crude product of a compound shown as a formula (I) and containing the diastereoisomer impurity (Ia), dissolving in an organic solvent, adding alkaline organic amine to react with the crude product, separating out a solid, and filtering to obtain an amine salt of the compound shown as the formula (I); acidizing the obtained amine salt in an aqueous phase solution; extracting an obtained aqueous phase, separating out a solid, and separating to obtain the high-purity Ledipasvir intermediate (I). The product obtained by the method has a de value up to more than 99.5 percent, and the yield of more than 80 percent; reaction conditions in the method are mild, raw materials are easy to get, and the method is suitable for industrial application.

The invention discloses a preparation method of a ledipasvir intermediate (1R,3R,4R)-2-Boc-2-azabicyalo [2,2,1] pentane-3-carboxylic acid. Benzylamine and glyoxylic ester are adopted as raw materials, under the effect of a chiral catalyst, the raw materials react with cyclopentadiene to generate (1S,3S,4R)-2-benzyl-2-azabicyalo [2,2,2] penta-5-alkene-3-carboxylic ethyl ester in a high-selective mode, the (1S,3S,4R)-2-benzyl-2-azabicyalo [2,2,2] penta-5-alkene-3-carboxylic ethyl ester is subjected to debenzylation and Boc protection and then hydrolyzed to obtain ledipasvir intermediate (1R,3R,4R)-2-Boc-2-azabicyalo [2,2,1] pentane-3-carboxylic acid. The method is good in selectivity, easy to implement and environmentally friendly.

The invention discloses a new method for synthesizing a Ledipasvir chiral intermediate. The specific synthetic method includes the following steps that 1,1-dihalo-methyl cyclopropane and N-Boc-glycine ethyl ester are subjected to cyclization in an alkaline environment, and a spiro-compound is obtained; the spiro-compound is subjected to saponification hydrolysis and BOC deprotection, and a 5-diazaspiro[2,4]heptane-6-carboxylic acid raceme is obtained; the 5-diazaspiro[2,4]heptane-6-carboxylic acid raceme is subjected to asymmetric resolution, and S-5-diazaspiro[2,4]heptane-6-carboxylic acid is obtained. By means of the new method for synthesizing the Ledipasvir chiral intermediate, the atom economy is improved, the production cost is reduced, synthesis is easy, preparation is convenient, and large-scale industrial production is promoted.

The invention discloses a ledipasvir intermediate monosulfate, a crystalline form thereof and a preparation method therefor, and specifically discloses a compound (crystal-form or amorphous) shown in a formula I, a preparation method therefor and application thereof. According to the preparation method provided by the invention, the crystal form I of the prepared compound shown in the formula I is good in light stability.

The invention provides a sofosbuvir and ledipasvir compound preparation. The compound preparation is prepared from sofosbuvir, ledipasvir, lactose, a solubilizer and a disintegrant, wherein the particle size d of ledipasvir is not larger than 55 mu m. With combined application of lactose, the solubilizer and the disintegrant in the compound preparation, dissolution of sofosbuvir and ledipasvir canbe obviously improved. The invention further provides a method for preparing the sofosbuvir and ledipasvir compound preparation. The method is simple and easy to operate, production requirements canbe met by conventional equipment, quality is controllable, and the method is suitable for industrial large-scale production.

Methods of preparing Ledipasvir and derivatives thereof, and intermediate compounds used in the preparation of Ledipasvir are provided. Specifically, a method for preparing the compounds of formula 1 and a series of preparation methods of preparing Ledipasvir are provided. The methods described herein are simple and efficient, and have better application prospects.

The invention belongs to the drug synthesis field and particularly relates to a preparation method of ledipasvir. The preparation method comprises the following steps: reacting by virtue of a compound (II) and a compound (III) under the action of alkali, so as to obtain a compound (IV); reacting by virtue of the compound (IV) and a compound (V) under the action of a metal catalyst, so as to obtain a compound (VI); reacting by virtue of the compound (VI) and an amine reagent, so as to obtain a compound (VII); reacting by virtue of the compound (VII) under the action of acid, so as to obtain a compound (VIII); and reacting by virtue of the compound (VIII) and Moc-L-valine under the action of a condensing agent, so as to obtain the ledipasvir represented by a chemical formula (I). The preparation method has the beneficial effects that the process route is short, the operation is simple and convenient, and the reaction yield is high.

The invention provides a novel method for preparing a ledipasvir intermediate compound VII. According to the method, a compound X is taken as a starting raw material and is subjected to three-step reactions by virtue of fluorine-containing compounds so as to obtain the compound VII; meanwhile, the total yield of three metal-catalyzed reactions is obviously increased, so that the atomic economic efficiency of fluorine is improved, and strong support is provided for the lowering of the cost of ledipasvir; and the reaction route is as follows: formula (shown in the description).

The invention relates to a method for recycling a precious metal catalyst in the preparation process of a ledipasvir midbody. The method comprises the following steps that a, a compound 1, bisdiboron,the catalyst palladium, dichlorobis(di-tert-butylphenylphosphine) and potassium carbonate are stirred and added into tetrahydrofuran in a reactor at the temperature of 50-60 DEG C, the reaction fluidis filtered so as to remove the residual potassium carbonate after the reaction is end, the filtrate is concentrated to be dry, then an organic solvent is added, the mixture is subjected to beating for 5-6 hours at the temperature of 60-70 DEG C, then the product is centrifugated when the temperature is decreased to be 20-30 DEG C, and a compound 2 is obtained; and b, the residual mother liquor being centrifugated in the last step is collected and concentrated to be dry, tetrahydrofuran, di-tert-butylphenylphosphine and an assistant with the weight being 5 times of the concentrated crude product are added to react for 1-2 hours at the temperature of 50-65 DEG C, and the catalyst palladium, dichlorobis(di-tert-butylphenylphosphine) can be obtained. The preparation technology is simple, thereaction yield is high, the production cost is lowered, and the method is suitable for industrialized production.

The invention discloses a synthesis technology for a ledipasvir intermediate. The synthesis technology is carried out through the steps of raw material selection and ledipasvir intermediate synthesis.The synthesis technology has the beneficial effects that synthesis steps are simple, impurity contents generated during the ledipasvir intermediate synthesis can be reduced so as to bring conveniencefor subsequent reaction, the synthesis efficiency of a ledipasvir finished product is improved, the yield of ledipasvir is improved, and therefore, the synthesis technology is favorable for realizingmass production and is also favorable for promotion, has a good use effect, and cost is lowered.

The invention discloses a synthesis process of a ledipasvir intermediate, wherein the intermediate is prepared by taking alpha-phenylethylamine and o-nitroaniline as raw materials, the two raw materials are low in price and easy to store, the alpha-phenylethylamine is further made into an intermediate 4, enamine is effectively prevented from reverse reaction under an acidic condition, and then the yield of the ledipasvir intermediate is affected; in addition, a catalyst is prepared in the process of preparing the ledipasvir intermediate, the catalyst takes a carbon nanotube as a carrier, the surface of the carbon nanotube contains a large number of active groups under the action of mixed acid, and the modified carbon nanotube is prepared; the modified carbon nanotube is soaked in an ethanol solution of palladium chloride and ruthenium chloride, so that the surface of the modified carbon nanotube contains a large amount of palladium and ruthenium; and compared with a traditional catalyst, the catalyst can be repeatedly used and is more convenient to separate from a reaction solution, the treatment difficulty of industrial wastewater is greatly reduced, and environmental pollution is prevented.