39 results about "Suvorexant" patented technology

The invention belongs to the field of organic synthesis and in particular relates to a synthesis method for an anti-sleeplessness medicine MK-4305 (suvorexant) intermediate. According to the synthesis method provided by the invention, 4-methyl-2-carboxyl phenylhydrazine hydrochloride is taken as substrate, hydrazone formation, oxime formation, loop closing and deoxidization are carried out, and 2-(4-methyl-2-carboxyl phenyl)-1,2,3-triazole can be conveniently and effectively synthesized. Compared with the existing method, the synthesis method provided by the invention has the advantages that raw materials are low in price, operation is easy, industrial production is easy to realize and no isomer is formed, so that the synthesis method provided by the invention has important application value. The compound synthesized by adopting the invention is a key intermediate for synthesizing anti-sleeplessness medicine MK-4305 (suvorexant) medicinal molecules.

The invention provides a synthesis method of a suvorexant intermediate (5S)-hexahydro-5-methyl-1H-1,4-diazepine-1-carboxylic t-butyl ester. The synthesis method of the suvorexant intermediate (5S)-hexahydro-5-methyl-1H-1,4-diazepine-1-carboxylic t-butyl ester comprises the following steps: (1) enabling a compound Suvor-1 to react with vitride solution to obtain a compound Suvor-2; enabling the compound Suvor-2 to react with 4,4-dimethoxy-2-butanone to obtain Suvor-3; (3) enabling the compound Suvor-3 to react with methanesulfonic acid to obtain a compound Suvor-4; (4) enabling the compound Suvor-4 to react with di-tert-butyl dicarbonate to obtain a compound Suvor-5; (5) enabling the compound Suvor-5 to react with hydrogen to obtain the suvorexant intermediate. The synthesis method of the suvorexant intermediate (5S)-hexahydro-5-methyl-1H-1,4-diazepine-1-carboxylic t-butyl ester provided by the invention has the advantages that the reaction is simple, starting materials are cheap and easy to obtain, the reaction condition is mild, and the production safety is high; in addition, the reaction steps are less, the reaction yield is high, and the production cost is lower; moreover, by introducing a chiral functional group, the purity of a target product obtained after induced synthesis and ring closure is high, the amount of impurities in enantiomer is small, the ee% is greater than97%, and the method is suitable for commercial large-scale production.

The invention relates to a synthetic method for an intermediate of suvorexant as an anti-insomnia medicament. The synthetic method is characterized in that 4-methyl-2-hydrazinobenzoic acid hydrochloride is taken as a starting raw material, and reacts with glyoxal to generate dihydrazone; then dihydrazone is subjected to cyclization under the action of copper trifluoromethanesulfonate to obtain a key intermediate 5-methyl-2-(2H-1,2,3-triazole-2-yl) benzoic acid of the suvorexant as the anti-insomnia medicament. The synthetic method disclosed by the invention has the advantages of low price of raw materials, short reaction step, simpleness and convenience in operation, no isomers difficult to separate, high content of products and easiness for industrial production; meanwhile, a ring-closing by-product 4-methyl-2-carboxy anilide is separated in a form of forming hydrochloride, and is a raw materials for synthesizing the starting raw material 4-methyl-2-hydrazinobenzoic acid, so that organic materials can be recycled, and further the total synthetic cost is lower; in addition, by recovering treatment, solvent can be used indiscriminately, economy, environment friendliness and important application value are realized.

The invention discloses a preparation method of raw drug suvorexant. The preparation method comprises the following step of generating S1 condensation acylation reaction by virtue of an intermediate I and an intermediate II in the presence of a condensing agent so as to generate an intermediate III, wherein the condensing agent is selected from one or combination of more than two of ethyl-(3-dimethylaminopropyl)carbodiimide hydrochloride, N,N'-carbonyldiimidazole, 1-hydroxybenzotriazole, 1-hydroxy-7-azobenzotriazole and tri(2,6-dimethoxyphenyl)bismuth. By adopting the proper condensing agent or condensing agent combination in the S1 condensation acylation reaction in the preparation method, and the yield in the prior art can be achieved at a reaction temperature of about 25 DEG C, and the condensing agent and intermediate products are simply separated, so that the energy saving and the consumption reduction in the large-scale industrial production are promoted.

The present invention relates to a process for the preparation of a compound of formula (A), Further, the present invention relates to the respective compound (A) as such and to its use in the preparation of antifungal agent.

The invention belongs to the technical field of medicines and relates to a method for preparing an important intermediate {2-[(5-chlorobenzoxazole-2-yl)-(3-one-butyl)-amino]ethyl}-tert-butyl carbamate. A highly toxic product methyl vinyl ketone is substituted by a compound with low toxicity, and due to catalytic reactions of DBU, LDA, NaHMDS, KHMDS and the like, a compound of a formula (3) can be obtained at high yield of 90% or higher. Moreover, the HPLC (high performance liquid chromatography) content of the crude product reaches 99.5% or higher, and the method disclosed by the invention is suitable for industrial production.

The invention discloses a method for preparing a Suvorexantintermediate as shown in a formula 8A and an analogue thereof, or pharmaceutically acceptable salts and solvates thereof, wherein R is hydrogen or an alkyl group of C1 to C6. The method comprises the following steps of removing an amino protection group of a compound as shown in a formula 3 to obtain a compound as shown in a formula 4A; d, adopting the compound as shown in the formula 4A for preparing to obtain a compound as shown in a formula 5A; e, adopting the formula 5A for preparing to obtain a compound as shown in a formula 6A; f, reacting the compound as shown in the formula 6A and a compound as shown in a formula 10A for preparing to obtain a compound as shown in a formula 7A; g, adopting the compound as shown in the formula 7A for preparing to obtain the compound as shown in the formula 8A. According to the method provided by the invention, the compound 8 is synthesized through a brand new process route, and is then adopted as an intermediate for preparing Suvorexant, so that the problems of the usage of toxic substances, high cost, long route and low yield in an existing method for preparing the Suvorexant are effectively solved, and the method is suitable for industrial application.

A solid dispersion comprising suvorexant or a salt thereof in amorphous form and at least one pharmaceutically acceptable matrix compound, wherein the matrix compound is (i) a polymer and wherein the solid dispersion contains the suvorexant or salt thereof in an 5 amount of at least 50 weight-% based on the combined weight of the suvorexant or salt thereof and the at least one matrix compound, or (ii) a silicon-based inorganic adsorbent.

The invention relates to a preparation method of a suvorexant intermediate represented by a formula IV, wherein the preparation route is defined in the specification. According to the present invention, the method has advantages of simple and safe operation, good yield, low environmental pollution and good economic benefits, and is suitable for industrial production. The formulas III and IV are defined in the specification, wherein R represents C1-5 substituted or unsubstituted benzyl and allyl.

The present invention relates to a process for the preparation of a compound of formula (A), Further, the present invention relates to the respective compound (A) as such and to its use in the preparation of antifungal agent.

The present invention relates to pharmaceutical formulations comprising as active compound Suvorexant, or its salts, or its metabolites or derivatives, thereof and pharmaceutical excipients, process for the preparation thereof and pharmaceutical compositions containing them. The pharmaceutical formulations of the present invention possess instantaneous redispersibility, increased apparent solubility and permeability, no observable food effect with respect to immediate absorption and more predictable plasma concentration throughout the night and next morning. The invention also relates to methods of manufacturing the pharmaceutical formulations and pharmaceutical compositions containing them according to the invention, their uses and methods of treatments using the pharmaceutical formulations and their pharmaceutical compositions.

The present invention relates to a synthesis process of suvorexant, novel compounds represented by formulas II, III, IV or V, or salts thereof for preparing suvorexant, and a method for preparing the intermediates. The preparation method uses a chiral starting material to synthesize chiral compounds represented by formulas II, III, IV or V, the compounds obtained being used for synthesizing the suvorexant. The preparation method has the advantages of simple operation, low cost, mild reaction conditions, simple post-treatment, easy to purify, high yield, high ee value for the product, and easy to industrialize. In the reaction route shown, R represents benzyl, allyl or 1-phenethyl, or optionally substituted benzyl at the 2 position to 6 position, such as 4-methoxybenzyl, 4-nitrobenzyl, 2-methylbenzyl, 4-chlorobenzyl or 3-fluorobenzyl.

The invention provides a preparation method of a suvorexant key intermediate as shown in a formula (I), which comprises the following steps: S5, carrying out Mitsunobu reaction ring closure on a compound 5 to obtain a compound 6; s6, the compound 6 is subjected to a deprotection reaction in the presence of alkali; then, salifying with acid to obtain a compound 7; and S7, dissociating the compound 7 in a salt form in the presence of alkali to obtain the compound as shown in the formula (I). The method has the remarkable advantages that the used raw materials are low in price, wide in source and easy to obtain; meanwhile, the reaction conditions of each step are mild, the process operation is simple and convenient, and the production cost is effectively reduced. In addition, the use of expensive and high-toxicity reaction reagents in the original process route is avoided, so that the safety and environmental protection property of production are improved. Therefore, the method is more suitable for large-scale industrial production and has very high application value and market prospect.

Relating to processes for preparing suvorexant or its pharmaceutically acceptable salts through the formation of a cocrystal of (R)-benzyl 5-methyl-1,4-diazepane-1-carboxylate hydrochloride with (R)-(+)-1,1,2-triphenyl-1,2-ethanediol ((R)-TED). This cocrystal provides the resolution of an intermediate of suvorexant, in particular, of (rac)-benzyl5-methyl-1,4-diazepane-1-carboxy-lateor a hydrochloride salt thereof. It also relates to a new cocrystal useful in such preparation processes.

The invention relates to a preparation method of suvorexant, which comprises the following steps: (1) dissolving a compound VIII (R)-4-(5-chlorobenzo [d] oxazole-2-yl)-7-methyl-1, 4-diazacycloheptane-1-carboxylic acid tert-butyl ester in a reaction solvent, adding an acidic reagent at the temperature of 5-15 DEG C, and reacting at the temperature of 25-35 DEG C to prepare a compound IX (R)-5-chloro-2-(5-methyl-1, 4-diazacycloheptane-1-carboxylic acid tert-butyl ester; 2, 4-diazacycloheptane-1-yl) benzo [d] oxazole is used as a raw material; and (2) in an alkaline environment and an aprotic solvent, carrying out acylation nucleophilic reaction on the compound IX and 5-methyl-2-(2H-1, 2, 3-triazole-2-yl) benzoic acid to obtain the suvorexant. According to the preparation method, the obtained product is high in yield, the purity reaches 99.9% or above, and the intermediate product is good in character, few in impurity and suitable for industrial production.

The invention discloses a preparation method of raw drug suvorexant. The preparation method comprises the following step of generating S1 condensation acylation reaction by virtue of an intermediate I and an intermediate II in the presence of a condensing agent so as to generate an intermediate III, wherein the condensing agent is selected from one or combination of more than two of ethyl-(3-dimethylaminopropyl)carbodiimide hydrochloride, N,N'-carbonyldiimidazole, 1-hydroxybenzotriazole, 1-hydroxy-7-azobenzotriazole and tri(2,6-dimethoxyphenyl)bismuth. By adopting the proper condensing agent or condensing agent combination in the S1 condensation acylation reaction in the preparation method, and the yield in the prior art can be achieved at a reaction temperature of about 25 DEG C, and the condensing agent and intermediate products are simply separated, so that the energy saving and the consumption reduction in the large-scale industrial production are promoted.

The invention discloses a Suvorexan intermediate and a preparation method thereof. Said Suvorexan intermediate is wherein, R represents methyl or ethyl, and PG1 and PG2 represent amino protecting groups. The preparation method is as follows: carrying out a Michael addition reaction with the compound III to obtain compound III; removing the amino protecting group from compound III to generate compound IV; reducing compound IV to obtain compound V; protecting the secondary amine in compound V with an amino protecting group to obtain compound IV VI. The invention avoids the use of the highly toxic compound methyl vinyl ketone, obtains the intermediate of Suvorexan in the desired configuration by using the chiral starting material, and avoids the use of a chiral resolving agent or separation by chiral HPLC , as well as avoiding the use of transition metals and biological enzyme preparations for chiral catalysis. The reaction conditions have the advantages of simple post-processing, easy separation and purification, high yield, high ee value, and easy industrialization.

The invention belongs to the technical field of medicine synthesis, and particularly relates to a synthesis method of a suzertraline impurity, the process route is shown as the following reaction formula: S1, a compound I is subjected to double bond reduction to obtain a compound II; s2, carrying out carbonyl reduction on the compound II to obtain a compound III; s3, esterifying the compound III to obtain a compound IV; s4, performing nucleophilic substitution on the compound IV to obtain a compound V; s5, hydrolyzing the compound V to obtain a compound VI; and S6, carrying out condensation reaction on the compound VI and the compound VII to obtain an isomer impurity VIII. The invention discloses a synthesis route of the suzertraline isomer impurity VIII for the first time, solves the problem that the impurity lacks a standard reference substance in drug quality control, and provides a necessary material basis for quality research and analysis method development and verification of suzertraline bulk drugs and preparations.

The invention relates to a continuous flow micro-reaction synthesis method of a suvorexant intermediate, and belongs to the technical field of medicine preparation. According to the preparation method, a key intermediate of a suvorexant bulk drug is technically optimized by adopting a continuous flow microreactor technology, and the suvorexant intermediate is synthesized by taking 2-amino-4-chlorophenol and potassium ethyl xanthate as initial raw materials through cyclization reaction, halogenation reaction, chiral resolution and other reactions. Meanwhile, influences of halogenating reagent types, acid-binding agent types and alkali equivalent factors involved in the technological process on the yield and purity of corresponding intermediates are investigated, and the optimal technological conditions are determined. The optimization process has the advantages of mild reaction conditions, simplicity and convenience in purification, environmental friendliness and the like, and is suitable for industrial large-scale production.

The invention relates to a synthetic method for an intermediate of suvorexant as an anti-insomnia medicament. The synthetic method is characterized in that 4-methyl-2-hydrazinobenzoic acid hydrochloride is taken as a starting raw material, and reacts with glyoxal to generate dihydrazone; then dihydrazone is subjected to cyclization under the action of copper trifluoromethanesulfonate to obtain a key intermediate 5-methyl-2-(2H-1,2,3-triazole-2-yl) benzoic acid of the suvorexant as the anti-insomnia medicament. The synthetic method disclosed by the invention has the advantages of low price of raw materials, short reaction step, simpleness and convenience in operation, no isomers difficult to separate, high content of products and easiness for industrial production; meanwhile, a ring-closing by-product 4-methyl-2-carboxy anilide is separated in a form of forming hydrochloride, and is a raw materials for synthesizing the starting raw material 4-methyl-2-hydrazinobenzoic acid, so that organic materials can be recycled, and further the total synthetic cost is lower; in addition, by recovering treatment, solvent can be used indiscriminately, economy, environment friendliness and important application value are realized.

The invention discloses a method for determining libosan, suvorexant, nemorexant and amolenet in food, and relates to the technical field of food detection, and particularly relates to a method for determining libosan, suvorexant, nemorexant and amolenet in food. According to the method, a method for determining the contents of the libosan, the suvorexant, the nemorexant and the amolenet in the food is provided, namely candies and beverages are adopted as analysis samples, and the contents of the libosan, the suvorexant, the nemorexant and the amolenet are determined by a high performance liquid chromatography method or a high performance liquid chromatography-tandem mass spectrometry method, so that the content of the libosan, the suvorexant, the nemorexant and the amolenet in the food is determined. And drawing a standard curve by taking the concentration of the standard working solution as an abscissa and the peak area of the chromatographic peak of the compound or quantitative ion as an ordinate, so as to respectively obtain the contents of the lyblogxant, the suvorexant, the nemorexant and the amolenet.

The present invention provides a method for synthesizing Suvorexan intermediate (5S)-hexahydro-5-methyl-1H-1,4-diazepine-1-carboxylate tert-butyl ester, comprising the following steps: (1) compound Suvor-1 reacts with red aluminum solution to obtain compound Suvor-2; (2) compound Suvor-2 reacts with 4,4-dimethoxy-2-butanone to obtain Suvor-3; (3) ) compound Suvor-3 reacts with methanesulfonic acid to obtain compound Suvor-4; (4) compound Suvor-4 reacts with di-tert-butyl dicarbonate to obtain compound Suvor-5; (5) compound Suvor-5 reacts with hydrogen, Obtain Suvorexan intermediates. The method has simple reaction, cheap and easy-to-obtain starting materials, mild reaction conditions, and high production safety; in addition, the method has few reaction steps, high reaction yield, and low production cost; Induced synthesis, the target product obtained after ring closure has high purity, less enantiomeric impurities, and ee% is greater than 97%, which is suitable for commercial scale production.

The present invention relates to pharmaceutical formulations comprising as active compound Suvorexant, or its salts, or its metabolites or derivatives, thereof and pharmaceutical excipients, process for the preparation thereof and pharmaceutical compositions containing them. The pharmaceutical formulations of the present invention possess instantaneous redispersibility, increased apparent solubility and permeability, no observable food effect with respect to immediate absorption and more predictable plasma concentration throughout the night and next morning. The invention also relates to methods of manufacturing the pharmaceutical formulations and pharmaceutical compositions containing them according to the invention, their uses and methods of treatments using the pharmaceutical formulations and their pharmaceutical compositions.

The invention relates to a method for preparing 5-chlorine-2[5-(R)-methyl-1,4-diazacycloheptyl-1-] benzoxazole. The method includes the step of reducing a compound in the formula I (please see the formula in the specification). The invention further relates to a new midbody compound shown in the formula I. 5-chlorine-2[5-(R)-methyl-1,4-diazacycloheptyl-1-] benzoxazole is an important midbody for synthesizing medicine Suvorexant treating sleep disorders. According to the preparation method, initial materials are introduced into a chiral center, in the whole reaction process, reactions and reagents influencing the chiral center are not adopted, the chiral separation or chiral catalystic method which is high in cost and low in yield is avoided, chiral interference reactions do not exist in the technological process, chiral purity of products is guaranteed, only conventional methods and equipment are used, operation is easy, conditions are moderate, lines are short, the yield is high, and the method is suitable for industrial production.

Relating to processes for preparing suvorexant or its pharmaceutically acceptable salts through the formation of a cocrystal of (R)-benzyl 5-methyl-1,4-diazepane-1-carboxylate hydrochloridewith (R)-(+)-1,1,2-triphenyl-1,2-ethanediol ((R)-TED). This cocrystal provides the resolution of an intermediate of suvorexant, in particular, of(rac)-benzyl5-methyl-1,4-diazepane-1-carboxylateor a hydrochloridesalt thereof. It also relates to a new cocrystal useful in such preparation processes.

The invention discloses a suvorexant intermediate and a preparation method thereof. In the suvorexant intermediate, R represents methyl or ethyl, and PG1 and PG2 represent amino protecting groups. Thepreparation method comprises the following steps: carrying out Michael addition reaction to obtain a compound III; removing an amino protecting group from the compound III to generate a compound IV;reducing the compound IV to obtain a compound V; and protecting secondary amine in the compound V by using an amino protecting group to obtain a compound VI. According to the method disclosed by the invention, the use of a highly toxic compound methyl vinyl ketone is avoided, the suvorexant intermediate with the required configuration is obtained by using chiral starting raw materials, the separation by using a chiral resolving agent or chiral HPLC (High Performance Liquid Chromatography) is avoided, and the use of transition metal and a biological enzyme preparation for chiral catalysis is avoided. The reaction conditions have the advantages of simple post-treatment, easiness in separation and purification, high yield, high ee value, easiness in industrialization and the like.

The invention provides an oral soluble film for treating insomnia and a preparation method thereof, and the oral soluble film at least comprises suvorexant, a film forming material, and one or more of a plasticizer, a disintegrating agent, a flavoring agent or a sweetening agent, and a stabilizer. Wherein the film forming material is hydroxy propyl cellulose and a polyethylene caprolactam-polyvinyl acetate-polyethylene glycol grafted copolymer. Compared with existing tablets, the suvorexant oral soluble film is more suitable for old people, children or patients with dysphagia, can be rapidly disintegrated and dissolved out, is constant in release speed, is moderate in maximum blood concentration Cmax, and reduces side effects caused by too high blood concentration.

The invention relates to a method for preparing 5-chlorine-2[5-(R)-methyl-1,4-diazacycloheptyl-1-] benzoxazole. The method includes the step of reducing a compound in the formula I (please see the formula in the specification). The invention further relates to a new midbody compound shown in the formula I. 5-chlorine-2[5-(R)-methyl-1,4-diazacycloheptyl-1-] benzoxazole is an important midbody for synthesizing medicine Suvorexant treating sleep disorders. According to the preparation method, initial materials are introduced into a chiral center, in the whole reaction process, reactions and reagents influencing the chiral center are not adopted, the chiral separation or chiral catalystic method which is high in cost and low in yield is avoided, chiral interference reactions do not exist in the technological process, chiral purity of products is guaranteed, only conventional methods and equipment are used, operation is easy, conditions are moderate, lines are short, the yield is high, and the method is suitable for industrial production.