69 results about "Aminothiazole" patented technology

The invention discloses a lead-free phosphorus chemical nickel plating solution, and relates to the field of chemical nickel plating, and the lead-free phosphorus chemical nickel plating solution comprises the following components: 6-10 g / L of nickel salt, 5-10 g / L of a complexing agent, 1-5 g / L of a brightener, 5-12 g / L of a reducing agent, 0.6-0.9 g / L of a composite stabilizer, 2-10 g / L of a plating starting agent, 0.1-0.6 g / L of a hydrogen evolution preventing agent and 30-60 mg / L of a surfactant. The adopted plating starting agent is high in decomposition capacity, after the service cycle is increased to 4 MTO, the problem that decomposition products are accumulatively increased to a certain degree to cause blackening of a plating layer can be relieved, 5-6 MTO can be achieved, meanwhile, the adopted composite stabilizer is a composition composed of an aminopyrrole carboxylic ester compound and an aminothiazole carboxylic ester compound, and the composite stabilizer has the beneficial effects of being environmentally friendly and free of pollution. The stability of traditional elements such as lead and cadmium can be improved, and the problem that the service cycle of stabilizers such as benzotriazole or sodium thiosulfate is short can be solved.

The invention discloses a sulfanilamide thiazolyl resorcinol derivative and application of the sulfanilamide thiazolyl resorcinol derivative in preparation of a tyrosinase inhibitor and whitening cosmetics. The structural formula of the derivative is # imgabs0 #, in the formula, R represents a fat (aromatic) group substituent, and R'represents a hydrogen atom or methyl; the preparation method comprises the following steps: taking 2-chloro-1-(2, 4-dimethoxyphenyl) ethanone as an initial raw material, carrying out cyclization condensation on the 2-chloro-1-(2, 4-dimethoxyphenyl) ethanone and thiourea to obtain 4-(2-amino-1, 3-thiazole-4-yl) benzene-1, 3-dimethanol, carrying out reaction on 2-amino of thiazole and different fat (aromatic) sulfonyl chloride, and then removing methyl to prepare the 4-(2-amino-1, 3-thiazole-4-yl) benzene-1, 3-dimethanol. Pharmacological activity tests show that the compound has good inhibitory activity on tyrosinase, which indicates that the sulfanilamide thiazolyl resorcinol derivative can be researched and utilized as a novel tyrosinase inhibitor and whitening cosmetics.

Provided in the present invention are a 2-aminothiazole compound derivative and the use thereof. The compound has a chemical structure of general formula (I) as shown in the following formula. The compound derivative provided in the present invention has an inhibitory activity against dihydroorotate dehydrogenase (DHODH), and is expected to be used in the preparation of a drug for preventing and / or treating diseases related to DHODH.

The present invention relates to aminothiazole compounds of general formula (I), wherein R 1 , R 2 , R 3 and R 4 as defined herein, and also relates to methods for preparing said compounds, intermediate compounds useful for preparing said compounds, pharmaceutical compositions and combinations comprising said compounds, and the use of said compounds as a single agent or in combination with other active ingredients in the preparation of pharmaceutical compositions for the treatment and / or prevention of diseases, in particular diseases regulated by diacylglycerol kinase ζ (DGKζ).

The invention relates to the technical field of corrosion inhibitors in the pickling industry, in particular to a preparation method and application of a Mannich base thiadiazole quaternary ammonium salt corrosion inhibitor for methanesulfonic acid pickling. According to the method, amino thiadiazole is modified by Mannich, quaternization is further performed, and the thiadiazole corrosion inhibitor with the advantages of Mannich base and quaternary ammonium salt is obtained. Quaternary ammonium salt groups in corrosion inhibitor molecules endow the corrosion inhibitor with good water solubility, and the dispersity and adsorbability of the corrosion inhibitor in an acid solution are improved; thiadiazole ring, thioamide and the like contained in the corrosion inhibitor contain N and S atom groups, so that coordination with metal is facilitated, and the adsorption performance of the corrosion inhibitor is improved; and the tail alkyl chain can effectively isolate corrosive substances from being in contact with a metal matrix. The preparation method is simple in synthesis step and low in raw material cost, and the obtained corrosion inhibitor is excellent in corrosion inhibition effect. Under the condition of 353 K, the highest corrosion inhibitor efficiency on Q235 steel in methanesulfonic acid with the molar concentration of 0.5 M reaches 99.8%.

The present invention covers aminothiazole compounds of general formula (I), in which R1, R2, R3 and R4 are as defined herein, methods of preparing said compounds, intermediate compounds useful for preparing said compounds, pharmaceutical compositions and combinations comprising said compounds and the use of said compounds for manufacturing pharmaceutical compositions for the treatment and / or prophylaxis of diseases, in particular of diacylglycerol kinase zeta (DGKζ) regulated disorders, as a sole agent or in combination with other active ingredients.

The invention discloses a tumor inhibition preparation based on Ackermania muciniphila, and belongs to the field of tumor medicine.AKK and tumor cells are mixed according to a certain proportion and jointly injected into a mouse body, and it is found that AKK can inhibit growth of the tumor cells and can survive for at least 7 days in the tumor cells; in addition, the effect of AKK in a living body is better than that of AKK in a dead body, the AKK is mixed in a bioactive solution to prepare the tumor inhibition preparation based on Ackermania muciniphila, and an auxiliary agent glucosamino acid conjugate can be added in the preparation of the tumor inhibition preparation, so that the AKK-based tumor inhibition preparation can be used for preparing the tumor inhibition preparation based on Ackermania muciniphila and the AKK-based tumor inhibition preparation based on Ackermania muciniphila. The glucosamine acid conjugate has a glucosamine group and a 2-aminothiazole-5-carboxylic acid ester group, which are coupled by a succinic acid. The ackermansiella muciniphila-based tumor inhibition preparation provided by the invention has a good inhibition effect on tumor cells, is good in safety and can be used for preparing anti-tumor drugs.

To provide a solid preparation of a sustained-release pharmaceutical composition in which even a solid preparation has excellent structural stability while maintaining an effect of sustained-release of a pharmaceutical composition.SOLUTION: A solid preparation of a sustained-release pharmaceutical composition contains: (1) (R)-2-(2-aminothiazole-4-yl)-4'-[2-[(2-hydroxy-2-phenylethyl)amino]ethyl] acetic acid anilide or a pharmaceutically acceptable salt thereof; (2) one or more kinds of polymeric substances which form hydrogel having the average molecular weight of 100,000 or more or in which 5% aqueous solution has viscosity of 25°C 12 mPa s or more; and (3) one or more kinds of non-hydrophilic additives showing dissolubility that [amount of water for dissolving 1 g at 20±5°C exceeds 10 mL], where the solid preparation without considering coating does not contain a hydrophilic component showing dissolubility that [amount of water for dissolving 1 g at 20±5°C is 10 mL or less] other than a polymeric substance forming hydrogel of the component (2).SELECTED DRAWING: Figure 2

The invention discloses a photosensitive surfactant, a preparation method of the photosensitive surfactant, and an application of the photosensitive surfactant in a Knoevenagel condensation reaction. The preparation method comprises the following steps: reacting 2-aminothiazole with 2-fluorophenol to obtain thiazole azophenol, then reacting the thiazole azophenol with dibromoalkane with different chain lengths to generate an intermediate, carrying out an addition reaction on the obtained intermediate and trimethylamine, and purifying to obtain the photosensitive surfactant. Compared with a traditional photosensitive surfactant, the photosensitive surfactant prepared by the invention can realize reversible conversion between cis-isomer and trans-isomer under irradiation of visible light with different wavelengths, and is applied to a Knoevenagel condensation reaction; the problems that in the Knoevenagel condensation reaction, a catalyst needs to be added, a large amount of organic solvent is used, and product separation is tedious can be solved.

The invention relates to the technical field of detection, and particularly discloses a method for detecting 2-aminothiazole in marine sediments in a sea area near an offshore wind field, which comprises the following steps: extracting a sample by using a mixed solution, then deriving by using hexyl chloroformate, converting a target compound 2-aminothiazole into N-(thiazole-2-yl) carbamic acid n-hexyl ester, and detecting the 2-aminothiazole in the marine sediments in the sea area near the offshore wind field by using the N-(thiazole-2-yl) carbamic acid n-hexyl ester. And enriching and purifying the obtained derivative by using a solid-phase extraction small column, and detecting by using a liquid chromatography-mass spectrometry system. The method provided by the invention can be used for efficiently, quickly and accurately analyzing and detecting, and is suitable for detecting 2-aminothiazole in marine sediments.

The application discloses isobutyryl amino thiazyl resorcinol dipalmitate and a preparation method and application thereof. The compound is successfully prepared by performing an acylation reaction on isobutyryl amino thiazyl resorcinol and palmitic acid. Experiments prove that, compared with the prior art, the compound not only retains excellent whitening efficacy, but also exhibits extremely low cytotoxicity and significant soothing efficacy. The compound has whitening, soothing and high safety, overcomes the defect that traditional whitening agents are strong in irritation, and can be directly applied to cosmetics or skin external drugs, and has extremely high industrial value.

To provide compounds for the treatment and / or prophylaxis of diacylglycerol kinase zeta (DGKζ) regulated disorders.SOLUTION: The present invention relates to an aminothiazole compound represented by the following formula (I).SELECTED DRAWING: None

This invention relates to a flash etching solution, its preparation method, and its application. The flash etching solution comprises hydrogen peroxide, sulfuric acid, a corrosion inhibitor, a stabilizer, and water; the corrosion inhibitor comprises a combination of aminotetrazole, hydroxyethyl ethylenediaminetriacetic acid, and 2-aminothiazole. The flash etching solution provided by this invention significantly improves the stability of hydrogen peroxide, greatly extending its service life; and effectively improves problems such as large lateral corrosion and high roughness, thereby improving production efficiency and reducing production costs.

The present invention belongs to the field of advanced materials technology, and relates to a new rhodamine derivative, specifically to a 2-aminothiazolyl rhodamine 6G derivative and its preparation method and application. The present invention uses rhodamine 6G and 2-aminothiazole as raw materials to prepare the 2-aminothiazolyl rhodamine 6G derivative RGAT in a one-step reaction. On the one hand, RGAT shows excellent selectivity and high sensitivity to Fe<supgt;3+< / supgt>, with a significant fluorescence enhancement, a wide linear range for Fe<supgt;3+< / supgt>, and a good linear relationship with the Fe<supgt;3+< / supgt> concentration in the range of 0-50 µM of Fe<supgt;3+< / supgt> concentration, and the detection limit is as low as 2.4 nM. On the other hand, RGAT has antibacterial properties superior to commercially available bleach against both Gram-positive and Gram-negative bacteria, and RGAT has very low cytotoxicity, showing good application prospects in the fields of environmental monitoring and biomedicine.

The invention discloses a high-strength modified polypropylene composite material and a preparation process thereof, and relates to the technical field of polypropylene composite materials. The high-strength modified polypropylene composite material comprises the following raw materials in parts by weight: 60-70 parts of polypropylene, 15-18 parts of modified glass fibers and 5-6 parts of a thiazolyl phosphorus-containing flame retardant. The preparation method comprises the following steps: sequentially reacting phosphorus oxychloride with p-hydroxybenzaldehyde and 2-aminothiazole to obtain a thiazolyl phosphorus-containing flame retardant; the preparation method comprises the following steps: sequentially reacting glass fibers with 3-chloropropyltriethoxysilane and tetraethylenepentamine to prepare aminated glass fibers; and carrying out a reaction on the aminated glass fiber, acrylate-based hindered phenol and 2-[3-(2H-benzotriazole-2-yl)-4-hydroxyphenyl] ethyl 2-methacrylate to prepare the modified glass fiber. The modified glass fiber and the thiazolyl phosphorus-containing flame retardant are added into polypropylene, so that the polypropylene composite material is endowed with excellent flame retardance, weather resistance and mechanical properties.

The invention relates to a preparation method of ceftriaxone sodium, which comprises the following steps: (1) mixing aminothiazole acetic acid, an organic solvent and ethylene glycol, dropwise adding thionyl chloride to carry out primary reaction, concentrating the reaction liquid after the reaction is finished, then adding the organic solvent again and dropwise adding thionyl chloride to carry out secondary reaction to obtain chloroethanol aminothiazole acetate; (2) reacting the chloroethanol aminothiazole acetate with 7-ACT in the presence of immobilized penicillin acylase for synthesis to generate a first intermediate product; (3) reacting the first intermediate product with tert-butyl nitrite under an acidic condition to generate a second intermediate product; (4) reacting the second intermediate product with a methylation reagent under the action of a base catalyst to generate ceftriaxone acid; and (5) reacting the ceftriaxone acid with an inorganic base to generate the ceftriaxone sodium. The preparation method disclosed by the invention is mild in reaction, green and environment-friendly, high in yield and high in purity.

The invention relates to the technical field of anti-tumor pharmacy. Specifically, the invention relates to an anti-tumor activity application of a compound with a structure as shown in a formula I. In-vitro MTT (3-(4, 5-Dimethylthiazol-2-yl)-2, 5-diphenyltetrazolium bromide) antitumor activity evaluation finds that the compound shown in the formula I has a remarkable inhibiting effect on the growth of human colorectal cancer HCT116 and human breast cancer cells MCF-7. The anti-tumor activity of the compound with the structure shown in the formula I is disclosed for the first time, and the compound can be used for preparing medicines for resisting colorectal cancer and other tumors and has good development and application prospects. .

The present application relates to the technical field of electrocatalytic material, disclose a kind of preparation method and device of cobalt-doped nano-zinc sulfide oxygen reduction electrocatalytic material, comprising: amino thiazole, anhydrous zinc acetate and the solution of the preset concentration of cobalt nitrate hexahydrate are placed in grinding mortar and mixed grinding and drying, obtain electrocatalytic precursor, after grinding electrocatalytic precursor is placed in porcelain boat and using tube furnace to the pyrolysis precursor to be pyrolyzed, obtain pyrolysis product, using hydrochloric acid to the pyrolysis product is etched, obtain pyrolysis etching product, to pyrolysis etching product is washed and filtered, obtain initial oxygen reduction electrocatalytic material, the initial electrocatalytic product is dried, obtain target oxygen reduction electrocatalytic material.The present application is mainly aimed at solving the problem of current Pt / C catalyst with high price and low catalytic performance.

This disclosure relates to the crystalline hydrate forms of (S)-2-((R)-6-(N-((1s,3S)-3-amino-cyclobutyl)carbamimidoyl)chroman-2-yl)-2-((((Z)-1-(2-aminothiazol-4-yl)-2-(((S)-2,2-dimethyl-4-oxo-1-(sulfooxy)azetidin-3-yl)amino)-2-oxoethylidene)amino)oxy)propanoic acid, including crystalline hydrate form A, crystalline hydrate form B and crystalline hydrate form D, which are useful as antibiotic agents for the treatment of bacterial infections, such as bacterial infections caused by gram-negative bacteria, including strains that are multidrug resistant.

The present invention discloses the preparation and application of piperidine-linked oxadiazole and piperidine-fused aminothiazole-substituted anti-tumor curcumol derivatives. Through multiple groups of experiments, the anti-tumor activities of these newly synthesized derivatives are explored.

The invention belongs to the technical field of medicine synthesis, and discloses a synthesis method of ceftazidime, which comprises the following steps: (1) under the action of an acid-binding agent, carrying out condensation reaction on 7-APCA and alpha-(2-aminothiazole-4-yl)-alpha-[(tert-butyloxycarboryl) isopropoxyimino] acetic acid mercaptobenzene isothiazole ester in a solvent to obtain 7-APCA-alpha (2-aminothiazole-4-yl)-alpha-[(tert-butyloxycarboryl) isopropoxyimino] acetic acid mercaptobenzene isothiazole ester; after the reaction is finished, carrying out post-treatment to obtain ceftazidime tert-butyl ester; in the step (1), the acid-binding agent is isooctylamine and an aniline compound in a mass ratio of (1-5): 1; (2) hydrolyzing and crystallizing the ceftazidime tert-butyl ester obtained in the step (1) under an acidic condition to obtain ceftazidime hydrochloride; and (3) further neutralizing and crystallizing the ceftazidime hydrochloride in the step (2) to obtain the ceftazidime. According to the synthesis method, by adopting the composite acid-binding agent, side reactions are reduced, the content of by-products is reduced, and the purity of the product is improved.

The present invention relates to extended release composition of Mirabegron and process of manufacture thereof. The extended release composition of mirabegron comprising non-polymeric hydrophobic excipient as release controlling agent along with one or more pharmaceutically acceptable excipient is used in the treatment of symptoms associated with overactive bladder.

The application discloses a kind of synthesis method of dasatinib intermediate in the field of organic synthesis, with 2-aminothiazole-4-carboxylic acid as raw material, first and tert-pivaloyl chloride in situ generates mixed anhydride, further and 2-chloro-6-methylaniline condensation reaction occurs after, the compound 2 obtained is not separated directly hydrolyzed to obtain high-purity 2-amino-N-(2-chloro-6-methylphenyl) thiazole-5-formamide.Due to the mixed anhydride formed by tert-pivaloyl chloride has greater steric hindrance, and the further reaction of corresponding amine is conducive to the regioselectivity, and by-product tert-pivalic acid can be easily removed by post-treatment, so as to solve the disadvantages existing in the prior art, the unit operation involved in the whole preparation process is simpler, and the product purity and yield are higher, with good application prospect.

The invention belongs to the technical field of chemical synthesis, and discloses a cefotaxime sodium synthesis method based on one-step salification of a mixed solvent system and sodium isooctanoate. The method comprises the following steps: by taking 7-aminocephalosporanic acid (7-ACA) and 2-(2-aminothiazole-4-yl)-2-(methoxyimino) acetoxyimino ethyl acetate (AE active ester) as raw materials, in a dichloromethane-methanol mixed solvent, completing a condensation reaction through triethylamine catalysis, directly dropwise adding a sodium isooctanoate acetone solution to realize salification in one step, and carrying out post-treatment to obtain the 7-aminocephalosporanic acid (7-ACA)-2-(methoxyimino) acetoxyimino ethyl acetate (AE active ester)-2-(methoxyimino) acetoxyimino ethyl acetate (AE active ester). The cefotaxime acid intermediate does not need to be separated; and performing low-temperature washing and accurate drying subsequently to obtain a cefotaxime sodium finished product. According to the method, the defects that in the prior art, a two-step method needs intermediate separation and a one-pot method needs alkaline degradation are overcome, the production period is shortened to be smaller than or equal to 8 h, the total yield is larger than or equal to 92%, the HPLC purity is larger than or equal to 99.6%, the wastewater COD is smaller than or equal to 2000 mg / L, solvent residues meet the ICH Q3C standard, and the method has the advantages of industrial feasibility and environmental protection.

The invention provides a pyridone-containing aminothiazole heterocyclic compound as well as synthesis and application thereof. The aminothiazole heterocyclic compound has a structure as shown in a general formula I or a general formula II or a pharmaceutically acceptable salt or an isotope labeled compound thereof. The invention also discloses a preparation method and the like of the derivative. Experiments prove that the aminothiazole heterocyclic compound containing pyridone can effectively inhibit replication of herpes simplex virus in Vero cells, the compound is of a non-nucleoside structure, the inhibitory activity of the compound is superior to that of a clinical first-line drug acyclovir, and the compound can be used for preparing active drugs for resisting the herpes simplex virus. The general formula I or the general formula II is shown in the specification.

(2-((1H-pyrrolo[2,3-b]pyridine-3-carbonyl)imino)-2,3-dihydrothiazol-4-yl)methyl dihydrogen phosphates and (2-((1H-pyrrolo[2,3-b]pyridine-3-carbonyl)imino)thiazolidin-4-yl)methyl dihydrogen phosphates are disclosed. The compounds activate Yap and inhibit Lats kinases. They are therefore useful for treating hearing loss.

Provided is a novel compound that exhibits an excellent control effect against harmful plant diseases. An N-substituted oxy-2-aminothiazolecarboxamide compound represented by the following formula (in the formula, each symbol is as described in the description) or a salt thereof exhibits an excellent control effect against harmful plant diseases.

The application relates to a preparation method of 2-acylaminothiazole compounds, in particular to a preparation method of an intermediate of alvocidib, in the preparation method, a mixed solution of tetrahydrofuran and DMSO is used as a solvent to form a homogeneous system, so that the preparation method has the advantages of simple post-treatment, high yield and high product purity, and the method is especially suitable for industrial production.