704results about How to "Wide range of substrates" patented technology

The invention belongs to the technical field of environmental microbiology, and relates to high-efficiency heterotrophic nitrification aerobic denitrifying bacteria and a culture method and application thereof. The bacteria are Rhodococcus sp. DN2.3 with the preservation registration number of CCTCC M209300, can effectively remove ammonia nitrogen, nitrite nitrogen, nitric nitrogen and the mixture thereof from a water body, also can remove CODCr from organic wastewater, are suitable for treating high-concentration organic nitrogen-containing wastewater; the accumulation of nitrite and nitrate is avoided in the denitrifying process; and the process for treating wastewater by using the strain is simple and the denitrifying effect is stable.

The invention discloses a novel method for synthesizing an N-substitute amide derivative. The novel method is characterized by comprising the steps that at the air atmosphere, no catalyst or alkali or other any additives are added, an organic amine compound shown in a formula (I) is adopted as a reaction substrate, a solvent shown in a formula (II) is adopted as an acylation reagent, an acylation reaction is performed under the reaction temperature of 120-150 DEG C to generate the N-substitute amide derivative shown in a formula (III), and the equation is shown in the description. The novel method has the advantages that environmental protection is achieved, and post-treatment and product separation are easy; the range of the substrate is wide, and the substrate can be primary amine and can also be secondary amine; the solvent can be amide and can also be carboxylic acid, and the solvent can be adopted as the acylation reagent to participate in the reaction; the reaction efficiency is high, and the majority of reactions can reach the quantified yield; water and air have no effect on the reaction, inert gas shielding is not needed, and operation is easy.

The invention discloses a fluorescent transparent coating capable of realizing full colors. The fluorescent transparent coating comprises quantum dots and ultraviolet (UV) curing transparent ink. A method for preparing the fluorescent transparent coating comprises the following steps of: adding the quantum dots and the UV curing transparent ink into a charging bucket, and stirring by using a dispersion machine for 30 to 120 minutes; adding zirconium oxide beads of which the grain diameters are 0.2 millimeter, and grinding for 3 to 8 hours; printing the ground UV curing transparent ink containing the quantum dots on a base material by using an inkjet printer to form a target image; and irradiating by using ultraviolet light while printing the target image or after the target image is printed. According to the fluorescent transparent coating, the quantum dots which can emit fluorescent light of different wavelengths and the UV curing transparent ink are combined to realize full colors, and the image is printed by using the UV curing transparent ink through the inkjet printer; and the method is simple, high in efficiency and flexible and can be used for large-area inkjet, and the coating is high in curing speed and environment-friendly.

The invention discloses a trifluoromethylthio reagent as well as a synthetic method and application thereof and provides a compound I and a preparation method of the compound I. The preparation method comprises the step: reacting a compound 1a with trifluoromethylthio silver, so as to obtain the compound 1, wherein the reaction is as shown in the specification. The invention further provides application of the compound 1 as the trifluoromethylthio reagent. The compound 1 can react with amine compounds, thiol or phenolic compounds to generate the compound containing trifluoromethylthio. The trifluoromethylthio reagent 1 has the beneficial effects of high efficiency, conversion rate and yield, mild reaction conditions, low production cost and wide applicable range and is applicable to industrial production.

The invention discloses a COF material-loaded transition metal catalyst, and a preparation method and application thereof. The COF material-loaded transition metal catalyst comprises a COF material and Pd<2 +> or Ni <2+> loaded on the COF material. The preparation method comprises the following steps: 1) mixing an aldehyde precursor, an amine precursor and absolute ethyl alcohol, carrying out a full reaction, and separating and purifying a reaction product to obtain a COF material; and 2) mixing the COF material, a soluble Pd salt or soluble Ni salt and dichloromethane, carrying out impregnation loading, and separating and purifying the obtained product. The COF material-loaded transition metal catalyst has the advantages of high catalytic activity, good selectivity, wide substrate application range, easiness in recycling, mild reaction conditions, usage of green and environment-friendly reaction solvents and the like when used for a semi-hydrogenation reaction of phenylacetylene compounds, and is simple in preparation process, easily available in raw materials and low in production cost.

The invention discloses a benzimidazole chiral heterocyclic compound as well as a preparation method and application thereof. The structure formula of the benzimidazole chiral heterocyclic compound isshown in formula I, formula II or formula III in the description. The benzimidazole chiral heterocyclic compound is prepared by treating an iridium complex which is prepared through a metal iridium compound and a phosphoramidite ligand as a catalyst, performing intra-molecular allyl amination on allyl substrate, and then synthesizing with high efficiency and high enantioselectivity. The method has the advantages of being high in catalytic reaction activity, mild in reaction conditions, high in enantioselectivity, wide in substrate applicable scope, and environmentally friendly; the primary in-vitro enzyme inhibition activity test shows that the compound is high in alpha-glucosidase inhibiting activity and can be used as an alpha-glucosidase inhibiting agent, and the compound can also be used as a further modified drug intermediate; the compound has a potential application value in preventing or treating II-diabetes, obesity and complication medicines thereof and pilot compounds thereof.

The invention discloses a method for preparing 6-difluoro alkyl ketone. The method includes mixing allylbenzene formaldehyde, phenylboronic acid, monobromo difluoro acetic ester, palladium catalysts, alkali and solvents with one another to form reaction systems; carrying out reaction and then treating reaction products to obtain the 6-difluoro alkyl ketone with the structure shown in a formula I. The structure of the allylbenzene formaldehyde is shown in a formula II. The method has the advantages that 1, n-hydrogen atom transfer radical addition strategies are applied to remote aryl difluoro alkylation for alkene, three-component reaction is completely carried out on monobromo difluoro methyl compounds, the allylbenzene formaldehyde and boric acid by means of palladium catalysis, accordingly, the 6-difluoro alkyl ketone can be synthesized by the aid of one-pot processes, reaction conditions are mild, the method is easy to implement and excellent in yield and has excellent theoretical value and an excellent application prospect, functional groups are good in compatibility, and substrates are wide in applicability.

The invention belongs to the technical field of organic synthesis, and particularly relates to application of a cyclopalladated ferrocenylimines-phosphine adduct in the synthesis of a cyclopropyl alkyl aromatic compound. Halogenated aromatic hydrocarbon Aryl-X, alkali and cyclopropyl borate which serve as raw materials, and the cyclopalladated ferrocenylimines-phosphine adduct is used as a catalyst. The catalyst has high stability, efficient catalytic activity and wide application range, and a corresponding coupling product can be synthesized in a mode of high yield (which is up to 96 percent) on the premise of small catalytic quantity; and the method is mild in reaction condition, wide in range of substrates and high in specifity of reaction.

The invention relates to a synthetic method of an alpha-hydroxyl carbonyl compound. The method is as below: mixing a carbonyl compound (I) with an organic phosphorus compound in an organic solvent; adding a catalyst cesium carbonate; and reacting under aerobic conditions to obtain the alpha-hydroxyl carbonyl compound (II). R1 is selected from the group consisting of hydrogen, alkyl, alkoxy, amino, aromatic base, substituted aromatic base and heterocyclic aromatic base; R2 is selected from alkyl, carbonyl, ester and phenyl; R3 is selected from alkyl, carbonyl, ester group and phenyl. Or, R1 combines with R2 to form naphthenic group or substituted cycloalkyl, benzo cycloalkyl base or substituted benzo cycloalkyl base, indole ring or substituted indole ring. Or, R2 combines with R3 to form the cycloalkyl or substituted cycloalkyl. The organic phosphorus compound is triphenylphosphine or triethyl phosphate. The organic solvent is dimethyl sulphoxide, N,N-dimethyl formamide, N,N-dimethyl acetamide or N-methyl pyrrolidone.

The invention discloses a method for preparing substituted alkene. The method is characterized in that Suzuki coupling reaction and Heck coupling reaction occur in turn under the action of a catalyst with a vinyl fluoride potassium silicate compound and halogenated hydrocarbon as a reaction substrate to obtain the substituted alkene, wherein the halogenated hydrocarbon is a halogenated aromatic hydrocarbon or a halogenated aliphatic hydrocarbon, the halogen atom is selected from chlorine, bromine or iodine; the vinyl fluoride potassium silicate compound refers to an olefin compound with double bond connected with boric acid group, the catalyst is a palladium catalyst. The method provided by the invention has the advantages of simple operation, mild condition, convenient post-processing, easiness of geting raw materials and wide range of suitable substrates.

The invention discloses nail-free glue and a preparation method thereof, and belongs to the field of a binding agent. The nail-free glue is characterized in that the sealant consists of the following components in parts by weight: 100 parts of silane-terminated polyether, 70-140 parts of a plasticizer, 1-4 parts of a water removal agent, 0.5-4 parts of a stabilizer, 120-420 parts of filler, 3-6 parts of an adhesion accelerant and 2-5 parts of a catalyst. The product disclosed by the invention is free from volatile solvent component in a component formula, environmentally friendly and free from harm, and has performances of fast hardening, excellent mechanical property and adhesion property, heat resistance, water resistance, aging resistance and the like; and the nail-free glue can be widely applied to the binding of such base materials as stone, glass, wood, metal, plastic and the like.

The invention provides a method for performing gold-catalyzed selective C-H bond functionalization on phenol and aniline, which comprises the following steps: by taking phenol and aniline compounds as raw materials and taking phosphine ligand or carbene as ligand, in organic solvent, reacting with a diazo compound in the presence of a gold catalyst and a silver salt, performing carbon-hydrogen bond insertion at the para-position or ortho-position of the phenol or aniline structure. The method provided by the invention has the characteristics of low catalyst consumption, mild conditions, wide substrate application range and the like; the method can be used for quickly and efficiently synthesizing methyl acetate derivatives containing the phenol or aniline structure; and meanwhile, the method can be used for performing later modification on natural products or drug molecules (such as estrone), or be used for synthesizing some molecules having biological activity, thus having favorable application prospects.

The invention belongs to the anti-fake field, especially relates to a method of anti fake by utilizing the visible random structure character. The invention discloses a method of anti fake by utilizing the visible random structure characteristic an tifake method, wherein the key is that the visible random structure characteristic adopts the printing ink or paint during the printing and daubing-upprocess or the visible random structure character after the printing or daubing cup process.

Disclosed are methods for synthesizing an ester or a carboxylic acid from an organic alcohol. To form the ester one reacts, in the presence of oxygen gas, the alcohol with methanol or ethanol. This reaction occurs in the presence of a catalyst comprising palladium and a co-catalyst comprising bismuth, tellurium, lead, cerium, titanium, zinc and/or niobium (most preferably at least bismuth and tellurium). Alternatively that catalyst can be used to generate an acid from that alcohol, when water is also added to the reaction mix.

The invention discloses agranular type silver-based conductive ink. The agranular type silver-based conductive ink is prepared from the following raw materials in percentage by weight: 20-55% of a metal silver salt, 30-50% of an alcohol amine solution, 10-30% of a reducing agent and 0.3-0.5% of an additive, wherein the metal silver salt is at least one of silver nitrate, silver citrate and silver acetate; the alcohol amine solution is prepared by mixing an alcohol solvent and an amine solvent in a volume ratio of 1: (0.5-3); the reducing agent is at least one of ascorbic acid and formic acid; and the additive is at least one of curdlan and carboxymethyl cellulose sodium. The invention further discloses a preparation method for the conductive ink and the application in preparing an RFID label antenna. The conductive ink disclosed by the invention is strong in stability, low in thermal treatment temperature, simple in preparation method and easy to realize industrial production.