1814results about "Amino-hyroxy compound preparation" patented technology

This invention discloses a fluorene-based organic small molecule hole transport material and its applications. The general structural formula of the fluorene-based organic small molecule hole transport material is as follows: where n = 1-4, and R represents the hole transport capacity. This fluorene-based organic small molecule hole transport material is used as an undoped hole transport material in perovskite solar cell devices. By introducing dicarboxylic acid groups onto the fluorene-based organic small molecule hole transport material, when used in an inverted perovskite solar cell device, it can form chemical bonds with the hydroxyl groups of the glass conductive substrate, forming a directionally aligned self-assembled layer on the surface of the glass conductive substrate. This effectively improves the charge transport capability at the interface and increases the photoelectric conversion efficiency of the perovskite solar cell device. Furthermore, since this perovskite solar cell device does not contain lithium salts, it exhibits high water and oxygen stability. In addition, the synthesis process of this fluorene-based organic small molecule hole transport material is simple, and the raw materials are inexpensive and readily available, making it highly valuable for practical applications.

Compound (I), deuterated derivatives, and pharmaceutically acceptable salts of any of the foregoing are disclosed. Methods of treating cystic fibrosis using these compounds are also disclosed.

The invention belongs to the technical field of oilfield chemistry, and discloses a cross-linking agent for degradable gel and a preparation method and application thereof.The preparation method comprises the steps that a compound A is dissolved in an organic solvent and stirred to be uniform, and a first solution is obtained; adding a polymerization inhibitor and a compound B into the first solution, and uniformly stirring at room temperature to obtain a second solution; the second solution is sequentially subjected to heating stirring, diethyl ether washing, ethanol recrystallization, suction filtration and drying, and the cross-linking agent for gel is obtained. According to the invention, a non-conjugated aromatic system is added into a cross-linking agent structure, so that the prepared gel can be automatically degraded under a certain temperature condition; ammonium ions and halide ions are added into a cross-linking agent structure, so that the anti-pollution performance of the gel is enhanced, and the problems that existing gel is difficult to degrade and poor in anti-pollution performance are solved.

The invention relates to the technical field of organic chemical synthesis, in particular to a preparation method of 3, 4 '-diaminodiphenyl ether.The preparation method comprises the steps that S1, under inert gas and in a first solvent, m-dinitrobenzene and p-acetamidophenol are subjected to a heating reaction under the condition of a weak base catalyst, and 3-nitro-4-acetamido diphenyl ether is prepared; s2, in a second solvent, the 3-nitro-4-acetamido diphenyl ether is subjected to a hydrogenation reduction reaction, and 3-amino-4-acetamido diphenyl ether is prepared; and S3, dissolving the 3-amino-4-acetaminodiphenyl ether in an alcohol solvent system, adding an aqueous solution of alkali, controlling the reaction temperature, carrying out a hydrolysis reaction, and after the reaction is finished, carrying out post-treatment to obtain the 3, 4 '-diaminodiphenyl ether. The preparation method provided by the invention has the advantages of easily available raw materials, low price, good selectivity and high product yield, and is more suitable for industrial production by comprehensively considering economical efficiency and safety.

The invention provides a novel method for synthesizing a fluoroalkyl substituted 4, 4 '-diaminodiphenylmethane compound, which comprises the following steps: under the action of a catalyst, reacting an amine compound with a fluorine-containing aldehyde compound in an organic solvent, and after the reaction is finished, carrying out post-treatment to obtain the fluoroalkyl substituted 4, 4'-diaminodiphenylmethane compound. The method has the advantages of mild reaction conditions, simple operation, high reaction efficiency, cheap and easily available raw materials, good atom economy, no generation of wastes, and large-scale application prospects. In addition, the fluoroalcohol solvent is recycled through simple distillation operation, the cost of a large amount of solvent is effectively saved, the process safety is improved, and efficient and green industrial production is facilitated.

The present disclosure, among other things, provides technologies for synthesis, including reagents and methods for stereoselective synthesis. In some embodiments, the present disclosure provides compounds useful as chiral auxiliaries. In some embodiments, the present disclosure provides reagents and methods for oligonucleotide synthesis. In some embodiments, the present disclosure provides reagents and methods for chirally controlled preparation of oligonucleotides. In some embodiments, technologies of the present disclosure are particularly useful for constructing challenging internucleotidic linkages, providing high yields and stereoselectivity.

The present invention provides a method for synthesizing alacastran, comprising reacting an amino compound of formula V with a chiral intermediate of formula VI, reducing the resulting product with a reducing agent capable of providing an ethyl group to produce a compound of formula VII, and then deprotecting the compound to obtain alacastran, as shown in the following reaction formula. The method for synthesizing alacastran of the present invention avoids the low yield caused by amide reduction and the risk of substrate racemization, has a high yield, low material cost, safe operation, and is suitable for industrial production.

The invention discloses a quaternary ammonium salt modified linalool derivative as well as preparation and application thereof. The structure of the quaternary ammonium salt modified linalool derivative is shown as a formula (I). The quaternary ammonium salt modified linalool derivative is prepared by carrying out nucleophilic substitution reaction on linalool and benzyltrimethylammonium chloride. The derivative can be applied to water-based disinfectants or antibacterial daily necessities. The derivative has good water solubility and bactericidal activity. Through the synergistic interaction of the quaternary ammonium salt group and the linalool mother nucleus, the disinfection and sterilization capacity of the linalool derivative is remarkably improved compared with that of independent quaternary ammonium salt or linalool, and the linalool derivative particularly has a better disinfection and killing effect on pathogens of a quaternary ammonium salt-resistant disinfectant. # imgabs0 #

The invention provides a method for preparing high-purity phosphatidylserine by a batch enzyme catalysis method based on dynamic choline removal, and belongs to the technical field of enzymatic reaction. According to the method disclosed by the invention, in a reaction system for preparing phosphatidylserine, a byproduct choline is selectively adsorbed by adopting resin. Choline in a reaction system is removed in real time through the integrated adsorption separation module, the enzyme inhibition problem is solved, and meanwhile, the PC conversion rate is larger than or equal to 98% and the PS purity is larger than or equal to 96% in combination with the immobilized enzyme circulation technology; the enzyme can be reused for more than or equal to 20 times (activity retention is more than or equal to 90%); and the choline residual concentration is less than or equal to 0.5 mM (an inhibition threshold value or less).

The invention discloses a functional cross-linking agent and a preparation method and application thereof, and relates to the technical field of oilfield chemistry and application, the structure of the functional cross-linking agent comprises a quaternary ammonium salt structure, an ester group and a conjugated non-planar central nucleus, no additional conditions such as illumination, acidic conditions or alkaline conditions are needed, and the functional cross-linking agent has good stability. The self-degradation can be realized under a certain temperature condition. The method is simple and reliable in technology, high in yield and suitable for large-scale industrial production. A three-dimensional network structure is formed through chemical crosslinking, weak bonds in the functional crosslinking agent are broken and the three-dimensional network structure is disintegrated under the action of a built-in catalyst, generated linear low-molecular-weight water-soluble polymers are dissolved in formation water to form low-viscosity fluid, flowback is not needed, and subsequent water injection is not affected; and temporary plugging maintenance and the like of a low-temperature oil field well can be realized.

The invention relates to the technical field of silicon dioxide surface modification, in particular to a silicon dioxide hollow sphere with an MOF composite layer, a manufacturing method and a dielectric loss prediction method. The silicon dioxide hollow sphere comprises a hollow spherical structure formed by silicon dioxide, an amino silane layer grafted on the surface of an inner core layer through a covalent bond, a ZIF-8 crystal layer growing in situ by taking amino as a nucleation site, and thiol groups distributed on the outer surface of an MOF crystal. According to the silicon dioxide hollow sphere with the MOF composite layer, the manufacturing method and the dielectric loss prediction method, the silicon dioxide hollow sphere with the MOF composite layer has good compatibility and stability in an LCP matrix, the dielectric loss is small, and the performance of a high-frequency FPC is effectively improved.

The application belongs to the technical field of functional resin, and particularly relates to a novel modified phenolic resin with high heat resistance, preparation and application thereof. The thermoplastic phenolic resin is modified by 4,4'-diaminodiphenyl methane (MDA) to improve the heat resistance of the phenolic resin. The obtained modified phenolic resin has excellent heat resistance, and when the modified phenolic resin is applied to a friction material as a binder, the wear rate of the friction material at high temperature is greatly reduced, and the service life of the friction material is prolonged.

A process for the hydrogenation of carbonyl compounds consisting of the following steps: (a) providing hydrogen with a molar share of deuterium ≤ 100 ppm, based on the total hydrogen content, by electrolysis of water using electrical power generated at least in part from non-fossil energy, (b) hydrogenating a carbonyl compound using the hydrogen provided in step (a) to form the corresponding hydrogenation product, wherein at least one carbonyl group of the carbonyl compound is hydrogenated.

The invention relates to sterile bispentadol sebacate, a preparation method thereof and medical application of a medicinal preparation containing the sterile bispentadol sebacate. Wherein the particle size D50 of the sterile bis (tapentadol) sebacate is 0.5 to 10 [mu] m. The invention also provides application of the bispentadol sebacate in preparation of various acute and chronic pain medicines, and the bispentadol sebacate has the characteristic of remarkable long-acting effect.

The invention belongs to the technical field of hydrogel sensors, and particularly relates to quaternary ammonium salt containing a carbamate structure as well as a preparation method and application of the quaternary ammonium salt. The structural formula of the quaternary ammonium salt is # imgabs0 #; wherein n comprises an integer from 7 to 17; m comprises an integer of 2-4; x comprises Cl, Br, I and F; the quaternary ammonium salt contains a carbamate group and can form a hydrogen bond, so that the quaternary ammonium salt and the generated hydrogel have excellent hydrophilicity and water-retaining property; the hydrogel participating in preparation has excellent fatigue resistance, tensile hysteresis, biocompatibility and antibacterial property.

The invention discloses a method for preparing a perovskite solar cell by passivating the surface of pure-phase two-dimensional perovskite, and belongs to the technical field of perovskite solar cells. The method comprises the following steps: synthesizing a pure-phase two-dimensional material by using an amine / ammonium compound, dissolving the pure-phase two-dimensional material in an organic solution, dynamically spin-coating the pure-phase two-dimensional material on the surface of three-dimensional perovskite, and annealing to form a pure-phase two-dimensional perovskite passivation layer. The pure-phase two-dimensional perovskite passivation layer with a wide band gap is applied to the top of the three-dimensional perovskite, so that energy level alignment between the perovskite layer and the charge transport layer can be improved, and electrons are effectively prevented from penetrating through the perovskite and a hole transport layer interface; meanwhile, the pure-phase two-dimensional perovskite passivation layer can effectively passivate surface defects of the three-dimensional perovskite thin film; the two-dimensional material has good hydrophobicity, degradation of the perovskite material caused by moisture can be reduced, and the long-term stability of the device can be improved. According to the method, the photovoltaic performance of the cell can be effectively improved, and the efficient and stable perovskite solar cell is obtained.

The invention belongs to the technical field of medicine synthesis, and particularly relates to a preparation method of metaraminol bitartrate. The preparation method comprises the following steps: reacting benzyloxycarbonyl-L-alanine serving as a raw material with dimethylhydroxylamine hydrochloride, then reacting with 3-benzyloxybromobenzene, then carrying out one-step hydrogenation reaction to obtain m-hydroxylamine, and finally salifying to obtain the metaraminol bitartrate. The method adopts a one-step hydrogenation method to simultaneously realize dual effects of reduction and deprotection, reduces operation steps and material consumption, saves material cost, and reduces generation of reaction wastes; in the preparation process, reaction conditions are mild, safety and reliability are achieved, operation is easy, and the obtained target product is high in yield, good in selectivity and suitable for large-scale production.

The invention discloses a migration-resistant macromolecular anti-aging agent as well as a preparation method and application thereof, and belongs to the technical field of anti-aging agents. The preparation method comprises the following steps: putting p-aminodiphenylamine into a reaction container; heating the reaction container, and stirring the interior of the reaction container by using a stirrer; dropwise adding glycidyl methacrylate into the reaction container; performing constant-temperature reaction for a period of time to obtain a reaction material; adding white carbon black, pouring reaction materials into a barrel of a high-speed stirring dispersion machine, and stirring and mixing; and taking out the powdery product to obtain the migration-resistant macromolecular anti-aging agent. According to the migration-resistant macromolecular anti-aging agent, p-aminodiphenylamine and glycidyl methacrylate serve as raw materials, the macromolecular anti-aging agent containing double bonds and hydroxyl is prepared through amino ring-opening epoxy reaction, the migration resistance of the anti-aging agent can be greatly improved through combination of the carbon-carbon double bonds and the structure on the surface of rubber, meanwhile, the hydroxyl can capture free radicals, and the migration resistance of the anti-aging agent is improved. The aging process of the rubber is delayed and the service life is prolonged.

The present disclosure provides derivatives of amino acids that have surface-active properties. The amino acid can be naturally-occurring or synthetic, or they may be obtained via a ring-opening reaction of a lactam, such as caprolactam. The amino acid may be functionalized to form a compound that is surface-active and have advantageous surfactant characteristics. The compounds of the present disclosure have low critical micelle concentrations (CMC) as well as superior ability to lower the surface tension of a liquid.

The invention relates to the technical field of isotope separation, and particularly discloses a functionalized ionic liquid as well as a preparation method and application thereof in separation of boron isotopes. The ionic liquid prepared from halogenated ether, a nitrogen-containing compound and fluorine-containing inorganic salt is used as a complexing agent for boron isotope separation. The ionic liquid has good chemical stability and thermal stability and can be kept stable in the long-time separation process of boron isotopes; the ionic liquid has unique selectivity, has different affinity and complexing stability to 10B and 11B, and is convenient to realize accurate separation of 10B and 11B; the boron isotope separation agent also has excellent solubility and flowability, can fully contact and react with boron isotopes, improves the separation efficiency, reduces equipment blockage and energy consumption, and provides convenient conditions for large-scale industrial boron isotope separation; in addition, the ionic liquid has better environmental friendliness, better meets the development requirements of green chemistry, and has huge application potential in the field of boron isotope separation.

The invention belongs to the technical field of stimuli-responsive materials, and particularly relates to a fluorene derivative as well as a preparation method and application thereof. The structural formula of the fluorene derivative is as shown in formula I. The fluorene derivative disclosed by the invention has a high-contrast three-color force-induced fluorescence discoloration property. The fluorescent powder has a green fluorescence emission characteristic under a room temperature condition, and the color of the fluorescent powder can be obviously changed when the fluorescent powder is subjected to different degrees of mechanical force. Specifically, after slight grinding treatment, the color of the fluorene derivative is changed from green to yellow, and the fluorene derivative emits light; and the heavy grinding operation is continued, the color is further converted from yellow to red to emit light, and the color can be recovered to the initial green under the fumigation of dichloromethane gas, so that the high-contrast three-color force-induced fluorescence discoloration is realized. Due to the unique property, the fluorene derivative has a wide application prospect in the fields of information encryption anti-counterfeiting technology, high-precision sensors, intelligent display equipment and the like. # imgabs0 #

The present invention relates to a method for continuously preparing 5-amino-1-pentanol, 1-amino-2-pentanol, and 1,5-pentanediamine using furfural as a raw material. The method comprises the following steps: After hydrogen and the raw material liquid are preheated to 20-150 °C in a preheater, they are simultaneously introduced into a fixed-bed reactor equipped with two sections of catalysts, and reacted at 30-150 °C and a reaction pressure of 0.1-8 MPa to obtain 5-amino-1-pentanol, 1-amino-2-pentanol, and 1,5-pentanediamine; the first catalyst is a metal catalyst supported on graphitic carbon nitride; the active metal of the second catalyst is one, two, or more of Ru, Pt, Rh, Cu, Co, and Ni; the carrier of the second catalyst is γ-Al2O3, TiO2, SiO2, ZrO2, CeO2, ZSM-5, cerium-zirconium solid solution, or activated carbon. The present invention solves the problem of poor selectivity in the process of generating 1,5-pentanediamine, and the product distribution can be changed by changing the catalyst.

The present invention provides a method for removing a nitrosamine with high selectivity and high efficiency.　More specifically, the present invention provides a method for removing a nitrosamine, the method including a step in which a substance to be irradiated, which contains the nitrosamine, is irradiated with light in the presence of an aromatic polyamine and a photocatalyst.

The invention provides a reaction type anti-aging agent composition and a preparation method thereof, and particularly, the anti-aging agent composition comprises a compound as shown in a formula I-1, a compound as shown in a formula I-2 and a compound as shown in a formula II, in the anti-aging agent composition, the total content of a compound as shown in a formula I-1 and a compound as shown in a formula I-2 is greater than 0 wt% and less than or equal to 99.8 wt%, and the content of a compound as shown in a formula II is greater than 0 wt% and less than or equal to 99.8 wt%; the structures of the compound in the formula I-1, the compound in the formula I-2 and the compound in the formula II are described in the specification. The anti-aging agent composition disclosed by the invention is simple in preparation process and almost free of three wastes. The anti-aging agent composition provided by the invention can endow the rubber composition with good thermo-oxidative aging resistance and excellent weather aging discoloration resistance.

The invention discloses a method for preparing a high-strength and high-toughness polyvinyl alcohol composite film by recycling waste polyimide, which comprises the following steps: mixing a waste polyimide material with organic diamine to perform ammonolysis reaction, recycling the organic diamine through reduced pressure distillation after the reaction is finished, uniformly mixing the organic diamine with a degradation product pure water, and filtering to obtain filtrate as a hydrogen bond cross-linking agent; and mixing and molding with a polyvinyl alcohol solution. According to the invention, the recycling of polyimide is realized, the method is green and environment-friendly, and accords with the concept of sustainable development, and the obtained polyvinyl alcohol composite film has high strength, high toughness, good transparency and good ultraviolet shielding performance.

The invention relates to a trans-4-aminocyclohexanol preparation method, which specifically comprises: (1) adding p-acetamidophenol, an organic solvent and a catalyst to a reaction container, carrying out nitrogen displacement, introducing hydrogen, heating, carrying out a stirring reaction, filtering the catalyst after the reaction is completely carried out, concentrating the mother liquor, carrying out reduced pressure distillation, and recrystallizing to obtain a pure product of p-acetamidophenol; (2) adding the pure product of p-acetamido cyclohexanol obtained in the step (1), sodium hydroxide and water into a reactor, heating, stirring for reaction, concentrating, filtering, dissolving with dichloromethane for liquid separation, drying, concentrating, pulping and filtering to obtain trans-4-aminocyclohexanol; the catalyst in the step (1) is a palladium-carbon catalyst with the metal content of 5%. By introducing the palladium-carbon catalyst, the preparation method of the trans-4-aminocyclohexanol is good in stereoselectivity, the cis-trans isomer ratio of the intermediate p-acetamido cyclohexanol can reach 9: 91, and the obtained product is high in yield and good in purity.

The invention belongs to the technical field of catalysts, and particularly relates to a catalyst, a preparation method thereof and application of the catalyst in synthesis of primary amine compounds. The preparation method of the catalyst comprises the following steps: dissolving Ni (NO3) 2 and terephthalic acid in a solvent, uniformly mixing, carrying out a hydrothermal reaction at a certain temperature to obtain Ni-MOF, washing, drying, and reducing in an H2 / Ar atmosphere to obtain the catalyst Ov-NiO / Ni-C-T (X) (wherein T represents the reduction temperature, the unit is DEG C, and X represents the reduction time, the unit is h). The preparation method of the catalyst is simple, the catalyst can be recycled for 7 times without obvious loss of catalytic activity and selectivity, and the catalyst has high catalytic activity for synthesis of primary amine through reductive amination of aldehyde compounds and ketone compounds.

The present invention relates to a process for the preparation of (6R)-6-(2-(N-(4-(2- (ethylamino)ethyl)benzyl)-N-ethylamino)-4-methoxyphenyl)-5,6,7,8-tetrahydro nap- hthalen-2-ol dihydrochloride (1) and its novel intermediates thereof. Elacestrant dihydrochloride (1) The present invention further relates to a process for the preparation of intermediates of formula (3), formula (4), formula (4a), formula (5), formula (5a), formula (6), formula (6a), formula (7), formula (7a), formula (9) and formula (10). with enantiomeric excess greater than 50%.

The invention relates to the technical field of synthesis of chemical products, in particular to a synthesis method of acryloyloxyethyl trimethyl ammonium chloride. According to the method, a one-pot reaction system is adopted, ethyl acrylate and N, N-dimethylaminoethanol are taken as raw materials and are subjected to quaternization reaction with chloromethane under an alkaline condition, and efficient conversion is realized through the synergistic effect of a composite catalytic system and a polymerization inhibitor. The composite catalyst is constructed by compounding magnetic nanoparticles and a metal organic framework material, forms a multilevel structure through titanate crosslinking, and has high catalytic activity and magnetic separation and recovery characteristics. The method simplifies the traditional step-by-step process, has the advantages of simple and convenient one-pot operation, recyclable catalyst, high raw material utilization rate, environmental friendliness and the like, and is suitable for large-scale preparation of acryloyloxyethyl trimethyl ammonium chloride.

The invention discloses nearly-spherical silver powder formed by self-assembly of silver nanosheets and a preparation method and application of the nearly-spherical silver powder, and belongs to the technical field of micro-nano material preparation. The preparation method comprises the following steps: firstly, adding a dispersing agent solution into a silver precursor compound solution, stirring, then adding a morphology control agent solution, stirring, and finally adding a reducing agent solution for reaction; and after the reaction is completed, the prepared silver powder is washed and dried, and the nearly-spherical silver powder formed by self-assembly of the silver nanosheets is obtained. The nearly-spherical silver powder is formed through self-assembly of the silver nanosheets, the particle size range of the nearly-spherical silver powder is 0.5-2.0 m, the thickness range of the self-assembled silver nanosheets is 10-50 nm, the overall size is uniform, a large number of stacking faults exist on the surfaces of the silver nanosheets, and the silver nanosheets show an excellent catalytic effect in conversion of p-nitrophenol into p-aminophenol.