205 results about "2-aminothiazole" patented technology

The invention discloses 4-tert-butyl-5-(1,2,4-triazol-1-yl)-2-benzylimino thiazole (I) having the chemical structural formula shown rightwards. A method for preparing the 4-tert-butyl-5-(1,2,4-triazol-1-yl)-2-benzylimino thiazole is as follows: the step of reflux reaction is carried out on the 4-tert-butyl-5-(1,2,4-triazol-1-yl)-2-aminothiazole and aryl aldehyde in benzene, thereby preparing the 4-tert-butyl-5-(1,2,4-triazol-1-yl)-2-benzylimino thiazole. The 4-tert-butyl-5-(1,2,4-triazol-1-yl)-2-benzylimino thiazole can be used for preparing bactericide.

The invention discloses 4-(benzofuran-5-yl)-2-benzal aminothiazole as shown in a chemical structural formula I. The preparation method of the 4-(benzofuran-5-yl)-2-benzal aminothiazole is as follows: 1-(7-hydroxy/ alkoxy-2,2-dimethyl-2,3-dihydro-benzofuran-5-yl) butanone is subject to bromination and reacts with thiourea to obtain 4-(7-hydroxy/ alkoxy-2,2-dimethyl-2,3-dihydro-benzofuran-5-yl)-2-aminothiazole which reacts with aromatic aldehyde to prepare the 4-(benzofuran-5-yl)-2-benzal aminothiazole. The 4-(benzofuran-5-yl)-2-benzal aminothiazole has good activity inhabiting activity on Hela cells, human liver cancer cells (Bel 7402 cells) and lung carcinoma cells (A549 cells) and can be used for preparing the antineoplastic agent.

The invention discloses 5-benzyl-4-alkyl-2-aminothiazole as shown in a chemical structure formula I and pharmaceutically acceptable salts of the 5-benzyl-4-alkyl-2-aminothiazole as shown in the specification. A preparation method of the 5-benzyl-4-alkyl-2-aminothiazole is as follows: heating 2-haslogen-1-aryl alkyl ketone, alkyl thiourea and ethanol, stirring, and reacting for a certain time; filtering, drying to obtain5-benzyl-4-alkyl-2-aminothiazole salts; and filtering the obtained filter cake and neutralizing with ammonia water, and then obtaining 5-benzyl-4-alkyl-2-aminothiazole. The invention also discloses application of the 5-benzyl-4-alkyl-2-aminothiazole or salts thereof in preparing antitumor medicaments.

The invention discloses a 4, 5-disubstituted-2-aminothiazole compound. The structural formula is shown in the specification, wherein R1 is 4-tolyl, 4-chlorophenyl, 4-methoxyphenyl, 4-nitrobenzene or propoxy, and R2 is phenyl, 4-tolyl, 4-fluorophenyl, 4-methoxyphenyl, 2-furyl, isopropyl, 4-nitrophenyl or n-propyl. The invention simultaneously provides a preparation method of the 4, 5-disubstituted-2-aminothiazole compound. The preparation method comprises the following steps: enabling an olefin azide type compound and potassium thiocyanate to react at the temperature of 75-85 DEG C in the presence of a solvent and a metal catalyst, concentrating an obtained reaction solution, then extracting with water and ethyl acetate, washing an obtained organic layer, then drying and concentrating by a rotary evaporator; performing silica gel column chromatography on an obtained concentrate to obtain the 4, 5-disubstituted-2-aminothiazole compound.

The invention relates to the technical field of medicinal chemistry, in particular to a 2-aminothiazoles compound or acceptable slat in pharmaceutical science, a preparing method thereof, pharmaceutical composition comprising the same, and application thereof in antineoplastic drug preparation.

The polishing solution for CMP of the invention comprises abrasive grains, a first additive and water, wherein the first additive is at least 1,2-benzoisothiazole-3(2H)-one or 2-aminothiazole. The polishing method of the invention is a polishing method for a substrate having a silicon oxide film on the surface, and the polishing method comprises a step of polishing the silicon oxide film with a polishing pad while supplying the polishing solution for CMP between the silicon oxide film and the polishing pad.

A pharmaceutical composition for modified release, comprising (1) (R)-2-(2-aminothiazol-4-yl)-4′-[2-[(2-hydroxy-2-phenylethyl)amino]ethyl]acetic acid anilide, or a pharmaceutically acceptable salt thereof, (2) at least one additive which ensures penetration of water into the pharmaceutical composition and which has a solubility such that the volume of water required for dissolving 1 g of the additive is 5 mL or less, and (3) a hydrogel-forming polymer having an average molecular weight of approximately 100,000 or more, or a viscosity of 12 mPa·s or more at a 5% aqueous solution at 25° C. is disclosed.

The invention provides a synthesis method of mirabegron and belongs to the technical field of medicine synthesis. The synthesis method solves the problems that the synthesis method of the mirabegron is low in product yield and is not suitable for large-scale industrialized production in the prior art. The synthesis method comprises the following steps: 1) amino protection: reacting 2-aminothiazole-5-acetic acid with an amino protective agent to obtain a mirabegron intermediate product A; 2) condensation reaction: performing condensation reaction on the mirabegron intermediate product A and 4-amino phenethyl alcohol to obtain a mirabegron intermediate product B; 3) oxidation reaction: performing oxidation reaction on the mirabegron intermediate product B and an oxidant to obtain a mirabegron intermediate product C; and 4) reductive amination and protecting group removal: reacting the mirabegron intermediate product C with (R)-2-amino-1-phenethyl alcohol and removing the protecting group from the mirabegron intermediate product C to obtain the mirabegron. The synthesis method of the mirabegron is low in cost, high in product yield and suitable for large-scale industrialized production.

The invention relates to a preparation method of a modified magnetic chitosan microsphere heavy metal ion adsorbent, and in particular relates to a modified magnetic chitosan material which has good selectivity and adsorptive property for heavy metal ions in food, and can be recycled, and a preparation method of the modified magnetic chitosan material. Specifically, the invention discloses the preparation method of the modified magnetic chitosan microsphere heavy metal ion adsorbent. The method comprises the steps of preparing magnetic chitosan microspheres by taking chitosan powder as a raw material, further preparing the magnetic chitosan microspheres into hydroxypropyl chlorine magnetic chitosan microspheres, and carrying out chemical grafting on the hydroxypropyl chlorine magnetic chitosan microspheres by taking the hydroxypropyl chlorine magnetic chitosan microspheres as parents and 2-aminothiazole as ligands to obtain the modified magnetic chitosan microsphere heavy metal ion adsorbent. The modified magnetic chitosan microsphere heavy metal ion adsorbent prepared by the method has preferential adsorption for Hg2+ ions.

The invention discloses a preparation method of a polyacrylonitrile chelating resin adsorbent. The method includes firstly, adding polyacrylonitrile microspheres to reaction solvents for immersion; secondly, adding 2-aminothiazole which serves as a ligand and metallic sodium which serves as a catalytic agent to the swelling polyacrylonitrile microspheres for reaction under protection of nitrogen; and thirdly, using the reaction solvents to immerse modified polyacrylonitrile chelating resins, washing the modified polyacrylonitrile chelating resins until washing liquids are colorless, sequentially using deionized water, alcohol and diethyl ethers to wash the modified polyacrylonitrile chelating resins for a plurality of times, then using distilled water to wash the modified polyacrylonitrile chelating resins, sequentially performing alkali wash, water washing, acid washing and water washing, and drying the polyacrylonitrile chelating resins to constant weight at the temperature between 40 DEG C and 60 DEG C to obtain the polyacrylonitrile chelating resin adsorbent. The polyacrylonitrile chelating resin adsorbent prepared by the method can absorb Hg (II) ions in a higher selectivity mode.

The invention provides a new preparation method of Cefdinir, in particular to a method for preparing Cefdinir from an intermediate of a new active ester. The preparation method comprises the following steps: using (Z)-2-(2-aminothiazole-4-yl)-2-acetoxyiminoacetic acid (ATAA) and 1-hydroxybenzotrizole (HOBT) to be subject to dehydrolysis condensation to generate a new active ester, i.e. 1-[(Z)-2-(2-amino-4-thiazyl)-2-(acetoxyimino) acetoxy] benzotrizole (AB-AE), then using the AB-AE and 7-amino-vinyl-3-cephalosporin-4-carboxylic acid (7-AVCA) as raw materials to be subject to the condensation reaction, and then hydrolyzing to prepare the Cefdinir. The invention has the advantages that the AB-AE has good stability and is convenient to store, the yield of the synthesized Cefdinir is more than 90%, and the process is more applicable to the industrial production.

The invention discloses a preparation method of cefepime hydrochloride, comprising the following steps of: reacting oxalyl chloride with 2-methoxyimino-2-(2-aminothiazole-4-yl) acetic acid hydrochloride to obtain a midbody I, i.e. 2-methoxyimino-2-(2-aminothiazole-4-yl) acetyl chloride hydrochloride; mixing silanized 7-aminoce-phalosporanic acid and silanized N-methylpyrrolidine, and reacting to obtain a midbody II, i.e. hydriodic acidification (6R, 7R)-7-amino-3-[(1-methyl-1-tetrahydro pyrrolidine) methyl]-3-cephem-4-formic betaine, in the presence of trimethyl idodine silicon hydride, isopropanol and an aqueous solution of hydrogen iodide; dissolving the midbody II into dichloromethane, sequentially adding trimethylchlorosilane and hexamethyldisilazane for reaction, and then adding the midbody I and triethylamine to react to prepare the cefepime hydrochloride. The cefepime hydrochloride prepared by the method has the advantages of uniform crystal form, good flowability and simple process and is suitable for industrialized production.

The invention discloses a new method for preparing ethyl 2-(2-aminothiazole-4-yl)-2-hydroxyimino acetate. The method for preparing ethyl 2-(2-aminothiazole-4-yl)-2-hydroxyimino acetate comprises following steps: taking diketene as raw material and producing intermediate product 4-chloracetyl acetidin through chlorination and esterification, and preparing final product through nitrosation and cyclization reaction. The invention is characterized in that it employs cheaper raw material and phase transition catalysis technology, which simplifies operation process, reduces reaction phase transition, decreases production cost and three- waste pollution, and its industry application value is great.

The invention provides a compound of aztreonam and a synthetic method thereof. In the method, general solvents are used, suitable amines are chosen, (2-aminothiazole-4-group)-2-(tert-butoxycarbonyl)-iminodiacetic acid isopropoxide acid-2-ester mercaptobenzothiazole and (3-S-trans form)-3-amino-4-methyl-2-oxo-1-sulfonic acid azetidine are used as intermediates; therefore, the method simplifies reaction and has good effect on depriving protecting groups by the mixed aqueous solution of acetic acid and hydrochloric acid.

The invention relates to a one-pot method for preparing an acotiamide hydrochloride (a compound V). The method comprises the following steps: by taking 2,3,5-trimethoxybenzoic acid as shown in a formula (I) and 2-aminothiazole-4-methyl formate as shown in a formula (II) as raw materials, carrying out a condensation reaction to obtain a compound III; selecting an appropriate solvent and controlling a reaction condition, directly carrying out an aminating reaction between an intermediate III which is not separated and purified and N,N-diisoprylamino ethylamine as shown in a formula (IV), and finally obtaining the acotiamide hydrochloride (the compound V) by use of the one-pot method. The one-pot method for preparing the acotiamide hydrochloride has the advantages that the reaction steps are reduced, the operation process is simplified, and the production efficiency is improved; besides, the method is safe and environmental friendly, and suitable for industrial production. The formulas (I, II, III, IV and V) are as shown in the specification.

The invention discloses a cefdinir compound and a new preparation method thereof. The method prepares the cefdinir by performing reaction on (Z)-2-(2-aminothiazole-4-group)-2-triphenylmethyl iminoacetic acid serving as an initial raw material, pentafluorophenol serving as an activating group and 7-AVCA.

The invention relates to a preparation method of cefdinir. According to the invention, under the effect of triethylamine, 7-amino-3-vinyl-8-oxo-5-thia-1-azabicyclo[4.2.0]octa-2-alkene-2carboxylic acid is subject to a reaction with (Z)-2-(2-aminothiazole-4-group)-2-acetyl oxyimino thioacetic acid(S-2-benzothiazole), such that a cefdinir ester liquid is obtained; the cefdinir ester liquid is extracted; an organic solvent is added to the cefdinir ester liquid; acetyl is removed by alkaline hydrolysis; sylvite of a weak acid is added to the liquid, the pH value is controlled, such that cefdinir sylvite is obtained; the sylvite is dissolved by using water; an organic solvent is added to the solution; the pH value is regulated, such that cefdinir is obtained. With the method, yield and quality are substantially improved; crystal form of the product is stable; and the method is suitable for industrialized productions.

The present invention relates to novel Anilinopiperazine Derivatives of formula (I), compositions comprising the Anilinopiperazine Derivatives, and methods for using the Anilinopiperazine Derivatives for treating or preventing a proliferative disorder, an anti-proliferative disorder, inflammation, arthritis, a central nervous system disorder, a cardiovascular disease, alopecia, a neuronal disease, an ischemic injury, a viral disease, a fungal infection, or a disorder related to the activity of a protein kinase.

The invention discloses an efficient synthesis method of mirabergron. The method comprises the specific steps that nitrophenylacetonitrile is subjected to a nitroreduction and nitrile group reduction reaction in hydrazine hydrate under the catalysis effect of a catalyst of palladium on carbon hydrogenation to obtain ethylamine; (R)-1-phenyl-1,2-ethanediol and methylsulfonyl chloride react under the catalysis effect of a basic catalyst of piperidine or triethylamine to obtain (R)-1-phenyl-1-hydroxy-2-mesyl-ethane; the (R)-1-phenyl-1-hydroxy-2-mesyl-ethane and the ethylamine react under the catalysis effect of a basic catalyst of potassium carbonate or triethylamine to obtain (R)-2-((4-amino phenyl ethyl amine)-1-phenethyl alcohol; the (R)-2-((4-amino phenyl ethyl amine)-1-phenethyl alcohol and 2-aminothiazole-4-ethyl acetate are subjected to a condensation reaction under the effect of potassium methoxide to obtain mirabergron. The method is simple and easy to implement, the raw materials are cheap and easy to obtain, the reaction efficiency is high, and the repeatability is good.