30 results about "Epinastine" patented technology

The invention discloses a new chemical synthesizing method of yipisidin, which comprises the following steps: ammonifying 6-chloromethyl-11-dihyrogen-dibenz [b,e] aza to generate 6-aminomethyl-11-dihydrogen-dibenz [b,e] aza; reducing the 6-aminomethyl-11-dihydrogen-dibenz [b,e] aza into 6-aminomethyl-6,11-dihydrogen-5H-dibenz [b,e] aza; generating the product through cyanogen bromide to loop. The invention simplifies the making method with little by-product, which improves the receiving rate by 69% with high purity (HPLC. 99. 0%) for industrial manufacturing.

The invention discloses a synthesis method of epinastine. The synthesis method is implemented by taking 2-aminobenzophenone as a raw material and comprises the following steps of: reacting the 2-aminobenzophenone with a silane agent to obtain 2-benzylaniline; then, carrying out acylation reaction on the 2-benzylaniline and 2-chloroacetyl chloride to obtain N-(2-benzyl phenyl)-2-chloroacetamide; carrying out acidamide dehydration and cyclization on the N-(2-benzyl phenyl)-2-chloroacetamide under the action of a dehydrating agent to obtain 6-(chloromethyl)-11H-dibenzo[b,e] azepine; carrying out azidation reaction on the 6-(chloromethyl)-11H-dibenzo[b,e] azepine to obtain 6-(azido-methytbiphenyl)-11H-dibenzo[b,e] azepine; carrying out reduction on the 6-(azido-methytbiphenyl)-11H-dibenzo[b,e] azepine to obtain 6-(aminomethyl)-6,11-dihydro-1H-dibenzo[b,e] azepine; and finally, carrying out cyclization on the 6-(aminomethyl)-6,11-dihydro-1H-dibenzo[b,e] azepine and cyanogen bromide to obtain the epinastine. The synthesis method disclosed by the invention avoids the application of expensive and flammable lithium aluminium hydride and aluminium hydride as well as hypertoxic sodium cyanide, so that the operation is safer in industrial production, and the cost is reduced. The method is simple in process and high in yield, requires mild conditions, and is suitable for industrialized production.

The invention discloses a stable granular medicine composition containing epinastine or hydrochloride thereof. The stable granular medicine composition also comprises a binding agent which has a stabilizing effect on the epinastine or the hydrochloride thereof. Meanwhile, the invention also discloses a preparation method of the stable granular medicine composition. The granular medicine composition disclosed by the invention can also be used as a medicament which urgently needs to be developed in clinic and has an excellent effect on allergic reaction diseases of children.

A pharmaceutical composition useful in the treatment of sneezing, itching runny nose, nasal congestion, redness of the eye, tearing, itching of the ears or palate, shortness of breath, inflammation of the bronchial mucosa, reduced Forced Expiratory Volume In One Second (FEV1), coughs, rash, itchy skin, headaches, and aches and pains associated with seasonal allergic rhinitis, perennial allergic rhinitis, common colds, otitis, sinusitus, allergy, asthma, allergic asthma and/or inflammation, in a mammalian organism in need of such treatment. The composition comprises: i) an effective amount of at least one leukotriene antagonist selected from a) montelukast, b) 1-(((R)- (3-(2-(6,7- difluoro-2- quinolinyl)ethenyl) phenyl)-3-(2- (2-hydroxy-2- propyl)phenyl) thio)methylcyclopropaneacetic acid; c) 1-(((1(R)-3 (3-(2-(2,3- dichlorothieno[3, 2-b]pyridin-5-yl) -(E)-ethenyl)phenyl) -3-(2-(1-hydroxy-1- methylethyl) phenyl)propyl) thio)methyl) cyclopropaneacetic acid; d) pranlukast; or f) [2-[[2-(4-tert -butyl-2-thiazolyl) -5-benzofuranyl] oxymethyl]phenyl] acetic acid; or a pharmaceutically acceptable salt thereof; in admixture with ii) an effective amount of at least one antihistamine which is descarboethoxyloratidine, cetirizine, fexofenadine, ebastine, astemizole, norastemizole, epinastine, efletirizine or a pharmaceutically acceptable salt thereof.

The invention provides a novel epinastine nasal drug delivery preparation and a preparation method thereof. According to the requirements of nose drops and biological characteristics of epinastine, an appropriate protective agent, a thickener and a corrosion remover are added to prepare aqueous solution nose drops. The novel epinastine nasal drug delivery preparation is free of bitter taste and thrill, and is suitable for nasal delivery, convenient to use, and especially suitable for medication on children and the old. The technological process provided by the invention has the advantages of being simple and reliable, and good in repeatability, can be applied to prevention and treatment of anaphylactic (including seasonal or non-seasonal) rhinitis, and has certain application value in clinical.

The invention discloses a method for synthesizing epinastine. The method comprises the following steps: (1) reacting 6-halomethylmorphanthridine with hexamine in an organic solvent, thereby obtaining a 6-halomethylmorphanthridine quaternary ammonium salt; (2) dissolving the 6-halomethylmorphanthridine quaternary ammonium salt in the organic solvent to carry out an acid hydrolysis reaction, thereby obtaining 6-halomethylmorphanthridine hydrochloride; (3) reducing the product 6-halomethylmorphanthridine hydrochloride obtained in the step (2) by using a reducing agent, thereby obtaining 6-aminomethyl-6,11-dihydro-5H-dibenzo[b,e]aza-cycloheptatrien; and (4) adding cyanogen bromide to carry out a ring-closure reaction, thereby obtaining the epinastine. According to the synthetic method disclosed by the invention, use of high-price and flammable lithium aluminum hydride or aluminum hydride is avoided, use of virulent sodium cyanide is avoided, and the security risk and production cost are effectively reduced. The method disclosed by the invention is simple in synthetic process, the reaction conditions are mild, the product is high in yield and high in purity, and industrial production is facilitated.

The invention discloses a preparation method of an epinastine related substance and relates to the technical field of medicines. The preparation method comprises steps as follows: epinastine is takenas a raw material, an oxidizing agent, a catalyst and a reaction system solvent are added, the mixture is stirred uniformly, an organic solvent is added after the reaction ends, extraction, washing, drying and suction filtration under reduced pressure are sequentially performed, and the organic solvent is recovered. An epinastine impurity A with the purity up to 97% is obtained through oxidation preparation, separation and purification steps, and the method is simple in preparation process, low in cost and high in yield.

There is provided homogeneous pharmaceutical compositions for the treatment of, for example, rhinitis, asthma and/or chronic obstructive pulmonary disease comprising a corticosteroid and an antihistamine, a polar lipid liposome and a pharmaceutical-acceptable aqueous carrier.

The invention belongs to the field of medicinal chemistry, and relates to a refined method of ebiprazole, which involves stirring and crystallizing crude ebiprazole with a mixture of ethers and ketones; collecting by filtration, washing, and vacuum drying to obtain pure ebiprazole The yield of prarazole crystals is more than 90%, and the purity (HPLC) reaches 99.4%, which reduces the impurities to about 0.1%.

The present invention discloses a new method for preparing an epinastine intermediate N-[2-(phenyl methyl) phenyl]-2-chloroacetamide. The method comprises the following steps of: by taking 2-aminobenzophenone as a starting raw material, firstly performing acylation and then performing reduction;, and introducing HCl gas to carry out selective reduction reaction for reducing carbonyl into methylene in the presence of Zn powder. The preparation method has the advantages of avoiding introduction of a solvent with a high boiling point and a toxic agent; and the method is simple in operation, mild in reaction condition, short in reaction time, low in cost, small in pollution, relatively high in product yield and product purity, and is suitable for industrial mass production.

The invention belongs to the technical field of medicines, and particularly relates to a preparation method of an epinastine impurity A. The invention provides a preparation method of an epinastine impurity A. The preparation method comprises the following steps: step 1, mixing epinastine free alkali, a hydrogenation catalyst and a reaction solvent, and carrying out heating reaction to prepare a reactant 1; step 2, filtering the reactant 1, removing the hydrogenation catalyst, and concentrating to obtain a reactant 2; and step 3, mixing the reactant 2 with a pulping solvent, pulping, filtering and drying to obtain an epinastine impurity A. The epinastine free alkali has a structure as shown in a formula I. The invention provides a preparation method of an epinastine impurity A. The technical defects of low purity and low yield of the prepared epinastine impurity A caused by many side reactions or low reaction conversion rate of an existing preparation method of the epinastine impurity A can be effectively overcome.

The invention discloses a synthesis method of epinastine, which comprises the following steps: taking cheap and easily available 2-aminobenzophenone as an initial raw material, reducing through hydroboron and lewis acid to obtain 2-benzylaniline, acylating with an acid-binding agent and chloroacetyl chloride to obtain N-[2-(phenylmethyl) phenyl]-2-chloroacetamide, cyclizing with a dehydrating agent to obtain 6-chloromethylmorphanthridine, and purifying to obtain the epinastine. The preparation method comprises the following steps: carrying out a condensation reaction on 2-(4-chlorophenyl)-6, 11-dibenzo-[b, e] azepine under the action of an acid-binding agent to obtain 6-(phthalimidomethyl)-6, 11-dihydro-dibenzo-[b, e] azepine, reducing carbon-carbon double bonds under the action of hydroboron to obtain 6-(phthalimidomethyl)-6, 11-dihydro-5H-dibenzo-[b, e] azepine, and carrying out a condensation reaction on the 6-(phthalimidomethyl)-6, 11-dihydro-5H-dibenzo-[b, e] azepine and the 6-(phthalimidomethyl)-6, 11-dihydro-dibenzo-[b, e] azepine. The preparation method comprises the following steps: firstly, preparing 6-aminomethyl-6, 11-dihydro-5H-dibenzo [b, e] azepine, hydrolyzing to obtain 6-aminomethyl-6, 11-dihydro-5H-dibenzo [b, e] azepine, and finally cyclizing with cyanogen bromide to obtain epinastine. According to the synthesis method disclosed by the invention, the use of an expensive silane reagent is avoided, the synthesis cost is greatly reduced, dangerous chemicals such as sodium azide and lithium aluminum hydride are not used, and the industrial operation is easy.

The present invention provides: an ophthalmic composition which has an effect of suppressing the degradation of a soft contact lens, the ophthalmic composition containing a boric acid or a salt thereof and an epinastine or a salt thereof; and a pollen rupture inhibitor containing a specific concentration of a boric acid or a salt thereof and an epinastine or a salt thereof.