169 results about "Aminoketone" patented technology

The present invention includes a catheter locking solution having both antimicrobial and anticoagulant properties including a local anesthetic and a viscosifying agent. The local anesthetic of the present invention may be an amino amide; an amino ester; an aminoacylanilide; an aminoalkyl benzoate; an amino carbonate; an N-phenylamidine compound; an N-aminoalkyl amid; an aminoketone, or combinations and mixtures thereof. In a particular embodiment of the present invention, the local anesthetic is tetracaine or dibucaine.

An ink composition of the present invention is disclosed, which contains (i) a sensitizing dye represented by the following Formula (I); (ii) at least one polymerization initiator selected from the group consisting of α-aminoketones and acyl phosphine oxides; and (iii) an ethylenically unsaturated bond-containing polymerizable compound. In Formula (I), X represents O, S or NR; n represents an integer of 0 or 1; R represents a hydrogen atom, an alkyl group or an acyl group; R¹ to R⁸ each independently represent a hydrogen atom or a monovalent substituent; R¹ and R², R² and R³, and R³ and R⁴ may be connected to each other to form a ring; and R⁵ or R⁶ may be connected to R⁷ or R⁸ to form an aliphatic ring but not to form an aromatic ring.

The invention relates to a method for generating beta-aminoketone, ester, nitrile and amide derivatives by performing aza-Michael addition on amine substances and electron-deficient alkenes through an efficient environment-friendly catalyst under solvent-free mild (room temperature) reaction conditions. The method comprises the steps of taking ionic liquid as the catalyst, subjecting amine substances and electron-deficient alkenes to aza-Michael addition at room temperature under normal pressure and obtaining corresponding beta-aminoketone, ester, nitrile and amide derivatives. The ionic liquid is repeatedly used five times, and reaction yield does not obviously drop. The method has the advantages of simple operation, high yield, good using repeatability of the catalytic reaction system, mild reaction conditions and good prospects for industrialization.

The invention discloses a method for catalytically asymmetrically synthesizing a chiral beta-aminoketone derivative. The method includes taking a chiral binaphthol derivative shown in a formula (3) asa catalyst; and in the presence of an organic solvent and an additive, preforming, by potassium trifluoroborate shown in a formula (2), an asymmetric 1,4-addition reaction on a beta-phthalimide acrylone compound shown in a formula (1) to generate the beta-aminoketone derivative containing one chiral center shown in a formula (4), wherein the reaction formula is shown in the specification. The invention discloses a new chiral catalyst of a polyfluoroaphthol skeleton, adopts nonmetallic catalysis, avoids the use of metal catalysts from the source, and reduces the reaction cost. The yield and enantioselectivity of the target product are high, the reaction conditions are simple and mild, and a method for preparing multiple chiral beta-aminoketone derivatives is provided, so that the method has better application prospect and social value.

The invention discloses a method for efficiently synthesizing chiral 1,2-amino alcohol by catalyzing alpha-aminoketone through Ir/f-amphox. A ligand f-amphox used by the method can be more easily synthesized; the reaction has the characteristics of enantioselectivity, high yield and high TON (turn over number); most substrates achieve the conversion rate being 99 percent or higher and the ee value being 99 percent or higher under the condition of the catalyst dosage being 0.002 mol% (S/C=50000); the highest TON reaches 500000 and is the maximum value reported at the present. The chiral 1,2-amino alcohol can be successfully used for the synthesis of a series of important medicines; important significance is realized on medicine industrial production.

The invention discloses a preparation method for an alpha-amino ketone derivative as represented by formula II. The derivative is prepared by subjecting a compound as represented by formula I to a reaction in an organic solvent under the action of trichloroisocyanuric acid and an oxidation catalyst or subjecting the compound as represented by formula I to a reaction in an organic solvent with a pH value of 8 to 11 under the action of an oxidizing agent, an oxidation catalyst, a pH conditioning agent and a phase-transfer catalyst, wherein, R1, R2 and R3 are, independently, lower alkyl groups, aryl groups, aryl-substituted lower alkyl groups, lower alkoxy groups, aryl-substituted lower alkoxy groups, carboxyl-substituted lower alkyl groups or carbonyl groups connected with lower alkyl groups, and R4 is a carbonyl group connected with a lower alkyl group, a carbonyl group connected with an aryl group or a carbonyl group connected with a phenyl-substituted lower alkyl group. The preparation method provided in the invention has the advantages of cheap and easily available raw materials, mild reaction conditions, small pollution to the environment and a high conversion rate of the raw material and is beneficial for industrial large-scale production.

The invention provides a novel aminoketones photoinitiator suitable for UV-LED light source curing. The novel aminoketones photoinitiator can be higher in adsorption in a long-wavelength region (365-395nm), is suitable for UV-LED light source curing, and overcomes the defects of high energy consumption and heavy pollution in traditional curing. The novel aminoketones photoinitiator is good in eectron delocalizability, has high intramolecular electron transfer performance and excellent photoelectric property, is higher in adsorption in the range of 365nm to 395nm in the long-wavelength region, is suitable for a high-power UV-LED ultraviolet photocuring system, and has considerable advantages compared with the photoinitiator in the prior art.

The invention provides a UV photocuring composition containing an aminoketone photoinitiator. The composition is suitable for a photocuring system, mainly suitable for a UV photocuring system, and particularly suitable for a UV photocuring ink and coating system; the UV photocuring composition containing the aminoketone photoinitiator is high in activity and can be subjected to radiation curing through a high-pressure mercury lamp and a UV-LED; surface layer curing of a coating can be achieved, and deep layer curing can also be achieved; and the UV photocuring composition has wide applicationprospects.

The invention discloses a protein polypeptide drug N-terminal fixed-point polyethylene glycol modification method. The method comprises the steps that 1, PEG terminal hydroxyl groups are converted into groups with higher activity to obtain a PEG active intermediate, and the PEG active intermediate and a small molecule compound of a hydroxyphenylacetic acid or alpha-hydroxy acid or beta-amino alcohol or alpha-aminoketones structure react to obtain a polyethylene glycol intermediate; 2, the polyethylene glycol intermediate is oxidized by an oxidizing agent to be a polyethylene glycol aldehyde derivative with active aldehyde groups at the terminal, then the polyethylene glycol aldehyde derivative is used for protein polypeptide drug N-terminal fixed-point polyethylene glycol modification, pegylation protein polypeptide drugs of a stable structure can be obtained through the reductive amination effect of a reducing agent, and the polyethylene glycol activity modifying agent preparation and decoration of the polyethylene glycol activity modifying agent for the protein polypeptide drugs need to be tightly connected. According to the protein polypeptide drug N-terminal fixed-point polyethylene glycol modification method, the problem that many polyethylene glycol aldehyde derivatives are likely to lose efficacy due to improper storage can be avoided, the period is short, and the cost is low.

The invention discloses a method for synthesizing alpha-amino ketone from ketone and imine, and belongs to the technical field of chemical organic synthesis. The method comprises the following steps: adding imine into an organic solvent, sufficiently dissolving so as to obtain an imine solution, further respectively adding ketone, a catalyst tetrabutyl ammonium iodide and an oxidant tert-butyl hydroperoxide into the solution, sealing up a tube opening, heating to be 130 DEG C, stirring for 3 hours, cooling down the system to be the room temperature after the reaction is ended, extracting by using dichloromethane and removing the solvent of on organic phase so as to obtain alpha-amino ketone. By adopting the method, defects in the conventional method for synthesizing alpha-amino ketone by electrophilic amination and nucleophilic amination are overcome, direct amination of alpha-position of a simple ketone compound such as acetone is achieved, a C-N bond is generated through oxidative coupling reaction between a N-H bond and a C-H bond at one step, and the alpha-position of a ketone substrate does not need to be prefunctionalized, so that the experiment steps are simple, the condition is gentle, the reagents are cheap, and the range of the substrate is wide; the method is applicable to industrial production.

The invention discloses a 5-aminolevulinic acid nano particle as well as a preparation method and a device thereof. The 5-aminolevulinic acid nano particle comprises therapeutically effective amount of 5-aminolevulinic acid, ion chelating agent and biodegradable polymer. The 5-aminolevulinic acid nano particle provided by the invention is stable in property, high in targeting selectivity, high in cell absorption rate, weakened in photo-bleaching phenomenon, and reinforced in photodynamic reaction, and is capable of enhancing tissue penetration depth combined with injection or micro-needle drug administration, so the 5-aminolevulinic acid nano particle has high application value.

The invention relates to photoactive oligomeric aminoketones of general Formulae I and II, for compositions and inks curable with ultraviolet (UV) light. The oligomeric aminoketones of the general Formula I are made by condensation of aminoketones with aldehydes, and aminoketones of the general Formula II are made by acylation of aromatic amines with phthalic anhydride, followed by esterification with a polyol. The aminoketones provide good curability of energy curable coatings and inks with UV-A light, and are proposed for photoinitiator systems for low migration inks.

This invention relates to solid compositions and solid pharmaceutical products for use in methods of photodynamic diagnosis of cancer, pre-cancerous and non-cancerous conditions in the lower part of the gastrointestinal system. The solid pharmaceutical compositions and pharmaceutical products comprise an active ingredient which is 5-aminolevulinic acid (5-ALA) or a precursor or derivative of 5-ALA or pharmaceutically acceptable salts thereof. The invention relates further to methods of photodynamic diagnosis of cancer, pre-cancerous and non-cancerous conditions of the lower gastrointestinal tract, wherein the solid pharmaceutical compositions and pharmaceutical products are used.

The invention relates to rapid UV (Ultraviolet) photo-cured ink and an application method thereof. The DI special ink is prepared from a composite photoinitiator, wherein the composite photoinitiatorconsists of di-2,6-difluoro-3-pyrrole phenyl titanocene dichloride, a ketoxime ester type photoinitiator, a thioxanthone photoinitiator, an acyl phosphine type photoinitiator, an alpha-hydroxyalkyl phenyl ketone photoinitiator and a morpholinyl-containing alpha-aminoketone photoinitiator; the di-2,6-difluoro-3-pyrrole phenyl titanocene dichloride accounts for 5-8% by weight of the total weight ofthe composite photoinitiator; the sum of weights of the other photoinitiators accounts for 90-95% by mass of the total weight of the composite photoinitiator. By adopting the composite photoinitiatorprovided by the invention, the problem that ink cannot be directly cured with ultraviolet light efficiently is solved; because of the low efficiency that ink is cured with ultraviolet light, a very long time for curing common ink is needed, although the problem of precise photo-curing is solved, low-efficiency photo-curing can be still not adopted in the industry.

The invention discloses escherichia coli recombinant bacteria capable of high-producing 2, 5-dimethylpyrazine and a construction method of the escherichia coli recombinant bacteria, and belongs to thetechnical field of gene engineering. According to the escherichia coli recombinant bacteria and the construction method thereof, a genetic engineering method is applied, L-threonine dehydrogenase TDHis overexpressed in escherichia coli K-12 capable of high-producing L-threonine, and NADH oxidase NoxE derived from lactococcus microorganisms and aminoacetone oxidase AAOSO derived from streptococcus microorganisms are expressed in a heterologous manner, and meanwhile 2-amino-3-ketobutyric acid CoA ligase KBL and primary amine oxidase TynA are knocked out, so that a novel and efficient 2, 5-dimethylpyrazine synthetic route is constructed, and the problem of unbalance of cofactors in the recombinant bacteria is solved. By taking escherichia coli E. coli THR as an example, the accumulation amount of 2, 5-dimethylpyrazine reaches 1.2 +/-0.2 g/L through a 36h shaking flask fermentation experiment of the recombinant bacteria. According to the method, L-threonine high-producing strains are used as starting strains, the synthetic route of 2, 5-dimethylpyrazine in escherichia coli is successfully reconstructed, the defect of unbalanced intracellular cofactors is improved, and a new idea is provided for breeding 2, 5-dimethylpyrazine.

A process for easily producing an optically active β-amino alcohol useful as a pharmaceutical intermediate from an inexpensive, readily available starting material is provided. A readily available α-substituted ketone is reacted with an optically active amine to yield a diastereomer mixture of an optically active α-substituted aminoketone. One of the diastereomers is isolated optionally after the diastereomers are converted to salts with an acid. The optically active α-substituted aminoketone or a salt thereof thus isolated was stereoselectively reduced to yield an optically active β-substituted amino alcohol. The optically active β-substituted amino alcohol is subjected to hydrogenolysis to produce an optically active β-amino alcohol or a salt thereof.

The invention discloses a preparation method of a high-purity polyethylene glycol aldehyde derivative. The preparation method comprises the steps that 1, PEG terminal hydroxyl groups are converted into groups with higher activity to obtain a PEG active intermediate, and the PEG active intermediate and a small molecule compound of an alpha-hydroxy acid or beta amino alcohol or alpha-aminoketones structure react to obtain a polyethylene glycol intermediate; 2, the polyethylene glycol intermediate is separated and purified by ion exchange resin; 3, the polyethylene glycol intermediate is oxidized by an oxidizing agent to obtain the polyethylene glycol aldehyde derivative. According to the preparation method, the polyethylene glycol intermediate with the high purity is obtained through separation and purification of the ion exchange resin, then quantitative oxidation is carried out through the oxidizing agent, and therefore the high-purity polyethylene glycol aldehyde derivative is obtained. The high purity means that the content of the polyethylene glycol aldehyde derivative is more than 98%. The preparation method is an economical method suitable for commercialized production.